#difference between java and dotnet

[valuecodetech]

Explore the key differences between .NET and Java, evaluating their performance, scalability, development processes, and suitability for web application technologies. More info: https://www.linkedin.com/pulse/net-vs-java-ultimate-comparison-web-app-technologies-amyra-sheldon-cbzie/ #.net #java #webdevelopment #webdevelopmentcompany #javadevelopers #DotNet #development #developer #WebApplications #technology

[hgllearn]

Why to Choose Python for Data Science Master Course

Choosing Python for a Data Science Master Course offers several compelling advantages that have made it the preferred language for data science and analysis. Here are some reasons why Python is a popular choice:

1. Ease of Learning and Readability: Python has a clean and easy-to-understand syntax that makes it approachable for beginners. Its code readability is often compared to pseudocode, which makes it convenient for both new and experienced programmers.

2. Rich Ecosystem of Libraries: Python boasts a vast collection of data science libraries and frameworks such as NumPy, pandas, Matplotlib, Seaborn, scikit-learn, TensorFlow, and PyTorch. These libraries provide tools for data manipulation, visualization, machine learning, deep learning, and more.

3. Community and Support: Python has a massive and active community of developers, data scientists, and researchers. This community support means you can easily find solutions to your problems, share knowledge, and collaborate with others.

4. Flexibility and Versatility: Python is a general-purpose programming language, meaning you can use it for a wide range of applications beyond data science. This versatility makes it valuable for transitioning between different projects and roles.

5. Interoperability: Python can seamlessly integrate with other languages like C, C++, and Java. This is particularly useful when working with existing codebases or utilizing specialized libraries in other languages.

6. Open Source and Free: Python is an open-source language, which means you won't need to worry about purchasing licenses or subscriptions. This affordability makes it accessible to students and professionals alike.

7. Data Visualization: Libraries like Matplotlib, Seaborn, and Plotly allow you to create visually appealing and informative graphs, charts, and plots to help you understand your data better and communicate your findings effectively.

8. Machine Learning and AI: With libraries like scikit-learn, TensorFlow, and PyTorch, Python is a go-to language for machine learning and artificial intelligence. You can build and train complex models efficiently, making it suitable for advanced data science projects.

9. Jupyter Notebooks: Python's integration with Jupyter Notebooks enables interactive and exploratory data analysis. You can combine code, visualizations, and explanatory text in a single document, making it easy to share and reproduce your analyses.

10. Career Opportunities: Python is in high demand in the job market, particularly in data science, machine learning, and artificial intelligence roles. Mastering Python can open doors to a wide range of exciting career opportunities.

11. Continuous Development: The Python language and its libraries are continually evolving, with regular updates and improvements. This ensures that you'll have access to the latest tools and features in the field of data science.

In summary, Python's ease of learning, extensive library ecosystem, community support, flexibility, and its applications across various domains make it an excellent choice for a Data Science Master Course. Its tools empower you to efficiently analyze, visualize, and model data, making it a valuable skill for anyone pursuing a career in data science or related fields.

HGL Learn is one of the Machine Learning in Hyderabad. We are providing professional educational services SAP training, Dotnet, Java, DevOps, Hadoop, Salesforce, Python, Core Java and other courses offered with a job orientation.

[meet28]

Difference Between Java and .NET - Which One is Better?

Difference Between Java and .NET – Which One is Better?

Technical languages are changing with time, and the evolution in programming industry is high-paced. This article will compare the Java vs .NET difference with an aim to aid in choosing the correct code for your website or app development. These two are the leading technologies that form the framework are used for developing server-side applications. The platforms focus on providing the languages…

[softwaredevelopmentcompanymel]

How to choose correct Software Development Company.

With such a staggering number of software designers across the globe, picking your ideal software development company turns into an overwhelming interaction. A best software development company fabricates software as per your necessities and helps you in taking your company to a higher level, wherein an obscure one will just wool cash from you.

A seaward software development group can represent the moment of truth your business. Subsequently, you should be cautious about whom you're joining forces with.

At the point when you search for software development organizations, you will go over various choices, with practically indistinguishable administrations and rates. Here is a nine direct agenda toward assist you with recruiting the best software development company.

1. What are their Moral Qualities?

A software development company with a solid hard working attitude will undoubtedly execute its undertakings in a more coordinated way. Survey their set of principles, investigate the staff's relational correspondence, and how well they can team up to achieve your venture. All things considered, one should enlist trustworthiness driven individuals and focus on giving you 100%.

2. Getting the Ideal Arrangement of Software Development Company.

The development processes for software require an expanded methodology and information on various programming dialects. Check the arrangement of the company and search for instruments used to effectively serve the past clients. The best software development company ought to have different encounters and ought to have the option to give you a decision between various dialects and stages. This implies that your ideal recruit ought to have insight in building complex software, food conveyance software, Web based business software, and so on.

Additionally, their methodology and procedure ought to give you more choices to make adaptable software, very much like you want. Consequently, to guarantee that you get the best administrations, search for the accompanying variables in the portfolio:

Huge involvement with different dialects like Java, DotNet, PHP, Respond Local, iOS, Android, JavaScript, Python, Hub, Respond and some more.

Experience in building an assortment of software.

Local area commitments like GitHub, Stackoverflow, TechNetExperts, and so on.

Keeps up with cutoff times.

Offers best in class UX/UI.

3. All Round Experience.

There are many working frameworks, similar to Windows, Linux, and Macintosh. Break down your objective stage and measure whether your accomplice company can construct the ideal application on that stage. You likewise need to vet whether your favored software development accomplice can fabricate a responsive application. To guarantee consistent software support, an accomplice company should have all over experience in building and overseeing software.

4. What Are Others Talking about the picked Software Development Company?

The assessment of their past clients' matter more than whatever the company shows you on paper.

What's more, the last thing you'd believe should do is joining forces with a company that doesn't satisfy your hopes. In this way, research what others say regarding the company. Search for the past applications they have assembled and check the evaluations on the Play Store and Application Store.

5. Seaward Software Development Organizations - Protected To Go for it?

While this isn't a major issue, area is a fundamental element to consider. While working with a software development re-appropriating company, you want to vet time-region similarity, the company's status to leave their usual range of familiarity to oblige you, their brief reactions, etc.

Most software development organizations figure out this case, in any event, when 53.80% acknowledge that staying aware of the client prerequisites can get testing while working from a distance. As they view the test in a serious way, they likewise surpass their benchmark. Consequently, go with a seaward company that is sufficiently nimble to adjust to your functioning style and is prepared to walk the additional mile to fulfill your necessities.

6. Security Conventions.

Practically all software today gathers individual certifications for check. The client can trust your administrations provided that you give them an affirmation of first rate security. Your software development accomplice ought to execute fundamental codes expected to safeguard private and restrictive information. They ought to likewise be GDPR consistent.

[sunilwebtrackker-blog]

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[harrymarxblog-blog]

Classic ASP with OO: full inheritance

Classic ASP with OO: full inheritance

Harry Marx

OK - I added the source here for you as well - and if you want to read my self-praise thereafter, you are warned.

http://www.nimbushost.co.za/sandbox/asp/aspp.asp?fname=example

PS. I found some major issues in the code and fixed it... working even better now :-)

PS2. This was done in 2015 - now 2018 - major upgrade available - soon will add a new link.

Note - this is not just about how nice classic ASP is, it is also about enhancements of it.

Topic 1: Classic ASP - is it still alive?

You may think I'm mad, but I will make a statement and support it with some interesting facts... "Classic ASP is among, if not THE, most advanced programming language there ever was. "

Now the reasons I say so...

Imagine you have a programming language that CANNOT do some stuff.

Take for example Classic ASP, one of the scripting language used in IIS for web pages (although not "supported" any more...)

There are stuff you cannot do with classic ASP, for example its class structures does not have inheritance and therefore not polymorphism. Imagine your pet language is JAVA, yes, it also has limitations - no multiple inheritance. And so does all languages have some shortcoming.

Now, my question to you is, can YOUR pet language be "extended" to do what they say it can't?

I will stick to Classic ASP for now.

My first problem was runtime includes. An include is like a "module", another source file, that IIS pulls into the main source file. You specify the name of the file where you want it to be included, and it is compiled into your source exactly where you want it. Nice.

But my problem was that I had many of these, and they are becoming co-dependent.  A and B used C (each included C), and if you included A and B into main.asp, you generally get "name redefinition errors".

So can Classic ASPs do runtime includes, and thereby test is C is already included and then NOT include it a 2nd time? NO, it can't. Oops, sorry, it CAN!

For example, a very naïve implementation:

    Dim fso, f, alreadydone

    if instr(alreadydone, "myRuntimeInclude.INC") = 0 then

       alreadydone = alreadydone & "myRuntimeInclude.INC"

       Set fso = Server.CreateObject("Scripting.FileSystemObject")

       set f = fso.OpenTextFile("myRuntimeInclude.INC", 1)

       source = f.ReadAll

       f.close

       set f = Nothing

       set fso = Nothing

       ExecuteGlobal source

     end if

Now you could package this in a nice SUB, do error handling, etc., and put it inside its own include, and you have the beginnings of runtime includes. In particular, you can add a global variable to this include, into which you add the names of the files included, and NOT include them a 2nd time.

So with a few simple lines of code, ExecuteGlobal enabled Classic ASP to do something it could not.

For example, doing a runtime include like this, will of course not do the nested static includes. No problem - turn the INCLUDE function into a recursive one, and do the static includes also runtime!

Does this makes everything slower? With todays fast servers and cached hard drives etc? Yes, slightly, but just throw more hardware at it and we are OK again - ha ha ha. Yes it is slower, but if you want speed - you would not have gone for classic asp. C++ comes to mind.

And what about HTML and scripting intermixed, as classic asp developers usually does?

No problem - execute the script and print the html as you parse the tags in the include!

Now I will of course add some more notes here, and finally provide you with the source code, but if you are wondering what the final product does, here are a few features:

* dynamic includes

* inheritance - multiple inheritance in fact

* private / inherited methods / properties

* polymorphism

* try - finally - catch blocks

* optional parameters

* function overloading

Thinking about function overloading... Classic VB, being practically a non-typed language, actually is "typed" like any other language. The difference is that in languages like C, pascal, java, dotnet etc., you define the variable's type, and it is fixed. In Classic ASP, the type of a variable is NOT fixed, and it changes according to the type of data in it - much more dynamic than ANY other language I know of. All other languages resolve the overloading at compile time, which is quicker, but still static. Classic ASP, if it had overloading, would have had to do the binding to the correct version of the overloaded method, at runtime - totally dynamic.

Yes, the example source I added here does ALL of the above!

Inheritance

So lets tackle the difficult issues, firstly inheritance:

Imagine you want to inherit from Parent. The ideal would be that you can simply in the ChildClass say:

#inherits filename

where filename contains a class definition with the same name as the file. OR,

#inherits classname in filename

where the file may contain multiple classes. (Or #inherit classname, where the file is assumed to have the same name.)

In theory all the runtime include will have to do is to read the body of the parent class and insert it into the child class's body, right?

It should drop the "class classname" and "end class" declarations from the parent of course.

This was simple. To implement this was in fact just 26 lines of code...

What about private and public  items in a class? Well the words "private" and "public" are already used in classic ASP, so why not extend it to OO directive?

#private initiates a section of not inherited  properties and methods, and must be followed with

#public which switches inheritance on again.

To implement this is a breeze - all you do is cut the parts in the Parent source between #private and #public.

To implement this was in fact just 7 lines of code...

What about #abstract methods? A one liner! Replace the #abstract tag with ThrowCustomError "abstract method not defined".

So what happens if the parent has a method "Display" and the child attempts to override it? You will get two definitions of Display in the childe class, and it will not compile - Name redefinition error.

This is a good thing! Because now you know you are trying to override a parent 's method.

The way to allow this is to use #overrides or #extends This will flag the assembler to drop the Display method from the parent definition, or to keep it with an adapted name parent_Display(). Simple, but in order to make provision for properties, subs functions, etc., this took much more code to implement, exactly 45 lines.

This #overrides tag does introduce a slight deviation from the normal OO conventions. It means you cannot call the parent's Display method inside the Child method. All the overridden methods are not available. But there is an easy fix if this is actually required. Many time you would inside a child's method do some action, and then call the parent's method with the same name. This is very much standard practice.

The #extends tag causes the parent's class to be renamed before it is added into the child class. You can call the inherited method with parent_display(). Why did I do it like this? Read on.

So all in all, it took exactly 90 lines of code, in the runtime include class, to enable the gist of OO into classic ASP. I am thinking, this is why MS has dropped support for classic ASP - it is simply too powerful.... ;-)

To recap, we implemented:

#inherits

#private

#public

#overrides

#extends

#abstract

.... in about 90 lines of classic ASP code.

And there is a small bonus. If you carefully check the code, you will notice that if A inherits from B, and B from C, all the "parents" are assembled into the source if A. The runtime include does not differentiate between who is doing what inheritance. This means you can actually have a child class inherits from multiple parents!!! You can define a chile and say:

class Child_class

#inherits A

#inherits B

...

end class

VERY few languages can do this! And that is why the #extended classes are renamed for the parent class. You can now call A_display() or B_display(), inside the child.

And you also get the case where A inherits B, which inherits C, and you want to call C_display() in A!

..now that is something to digest.

polymorphism

This is one of the complexities of OO that very few people understand. I will explain it as simple as I can.

Imagine you have two different types of objects, a square, and a circle. They are derived from "Form". Now you can define an object of type Form, and treat it as a container, in which a Square or a Circle is instantiated. Now you can call the container's Dsiplay() method, and polyM allows the correct Display method to be invoked, relative to if the container contained a Square or Circle.

At compile time, the compiler does not know which, or even if the display method is implemented.

Yet at run time, it calls the correct method!

You can have a function that takes Form as parameter, and inside the function call the Form.display method. Depending if the argument provided was a circle or square, the correct method is called.

This is in other words runtime binding or linking.

Normally as the example went, you require a "parent" class, which is often an abstract class, to act as type (container) for the derived classes. And normally you can only do this type of runtime linking, if the parent class defines a method (can be abstract) with this name.

But, the way in which this OO implementation works - you don't need either...!? because classic ASP is un-typed.

I can define a function that accepts a parameter:

Sub doDisplay(Obj)     Obj.Display   End sub

This is perfectly "compilable" in classic ASP, even though the class is never defined for Obj. Of course trying to execute it with doDisplay 10  will throw an error, because 10 does not have a Display method.

However, I can call this sub with ANY object, regardless of parentage, as long as the object has a Display method. And it will call the correct method - polymorphism without the overhead of an abstract method, or even a container class!

Heresy!

try-catch blocks

Now this is a tougher one. We want something like:

Try

    a = 1     a = a/0

    a = 2 Finally     a=0 Catch     Response.write "ERROR: div/0<br>" End try

Note the order of the finally and catch blocks. I swapped these for reasons explained later...

The issues is that classic ASP only provides us with the "on error resume next" mechanism.

I played around with some ideas, and the best I came up for now is to do it with a limitation - you cannot do a do-loop inside the try-catch block.

This is because I use an EXIT DO to jump out of the try-block.

So a simple solution is to translate the code into something like:

on error resume next Do

    a = 1: if err.number<>0 then exit Do     a = 1/0: if err.number<>0 then exit Do

    a = 2: if err.number<>0 then exit Do loop until True a=0 select case err.number

   Case 0

   case else       Response.write "ERROR: div/0<br>" end select

Err.Clear

on error goto 0

To get this working was a bit more difficult, it took about 66 lines of code.

Still, its working...

Arrays

I played around with [] brackets being replaced by array(). This is not very useful, but still its working.

For examp:

function foo( p )

   dim pp

   for each pp in p

      response.write pp & "<br>"

   next

end function

This you can then call with foo[], foo[1] or foo[1,2,3].

Function overloading

I started implementing function overloading, using the variable name, and an assigned type, as in : dim xxx #as myInt, where myInt could be ANY symbol. This I will call Variable Type Overloading. I implemented it as a global setting, and the value inside the variable does NOT carry the type with. Wherever xxx is used in the page, in all the includes as well, it is assumed to be of type myInt. This type has absolutely no effect on execution of any normal classic asp code, and only comes into affect when you overloaded a function/sub/property using Variable Name overloading: function foo(X #as myInt) can only be called now with xxx as input argument.

This is all done at compile time.

Take note that the variable type is GLOBAL, to all code underneath a runtime include, and all static includes inside the runtime include. This works for function, subs and properties, but I have not debugged it well.

Rather then I realized that classic ASP is not a type-less language, it merely hides the type from the developer, and as a bonus, the type of the variable can indeed be changed.

a = "string" 'a's type is String

a = 1 'a's type is now Integer

This is HUGE - I know of no other language that allows variable's types to change runtime, well other than when using polymorphism. So I realized that there is a 2nd form of function overloading possible: Value Type Overloading. And this has me excited.

With value type overloading, binding to the correct version of the function/sub/property is based on the data type in the variable, runtime! This is of course not achieved without overhead, as all runtime binding (even polymorphism) requires overhead. Yet it is simple and quick.

One important constraint to notice is that you CANNOT intermix variable type overloading and value type overloading in the same function. Keep them apart. This is because the one happens in the pre-processor, and the value type overloading happens runtime.

Variable type overloading is based on the actual symbol used for the data argument, while value type overloading is on the actual type of data being passed.

Value based overloading is local to within a class, or global outside all classes in a runtime include, and all nested includes. You can have the same function name as a class method, and as a global function, but they will be overloaded separately. Within a class, if you have two versions with the same pattern, you will get name redefinition errors, as the function name is merged with the pattern, and the combination is not unique. Functions that are inherited, are also pushed into the value type overload handler stack. If a parent's and child's function name and pattern are the same, you will get name redefinition errors.

There are a few constraints ito overloading:

*All versions of the function/property/sub must be of the same definition - they must be subs, or functions, or properties - you cannot mix these. All must public/private. Only a GET and a LET property can have the same overloaded name, any other will cause compile errors.

*Another silly constraint is that the definition of the method's name and parameters

must be in the same line, no line continuation character.

*Valid types are all types as returned by TypeName(): Byte, Integer, Long, Single,

Double, Currency, Decimal, Date, String, Boolean, Empty, Null, Object, Unknown,

Nothing, Error or the class name of an object.

You can also overload the return value of a getter or function. The return type will not be matched to the current type of whereto the value is returned, instead you have to tag the function/getter call itself with a type tag ex.: X = myFunc(Y) #of string. Only patterns that is tagged to return a string, will match to this call. Take note - the return type tag is not validated against the actual value returned either. So if function myFunc(Y) #of String  actually returns a n integer, the system will not see this as an error.

Also if you call myFunc with no type tag, as in X = myFunc(Y), it will match - if the type is omitted when calling the function, the return type of the overloaded function is ignored.

ooo

So tell me classic ASP is not powerful. To do all this, we needed just over 1000 lines of code.

By the way, I work at one of the largest universities in the world, and this whole runtime include concept, is forming the base of its current IIS web sites. In other words, it does work :-)

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The ASP.NET Core Revolution - .NET Core history through the years (2016-2019)

To summarize what happened in the ASP.NET world within the last four years is not an easy task; in short words, we can say that we've undoubtedly witnessed the most important series of changes in .NET Framework since the year it came to life: a revolution that changed the whole Microsoft approach to software development in almost every way. To properly understand what happened through these years it can be useful to identify some distinctive keyframes within a slow yet constant journey that allowed a company known (and somewhat loathed) for its proprietary software, licenses, and patents to become a driving force for open-source development worldwide.

Origins

The first relevant step, at least in my humble opinion, was taken on April 3, 2014, at the annual Microsoft Build Conference that took place at the Moscone Center (West) in San Francisco: it was there, during a memorable keynote speech, that Anders Hejlsberg -- father of Delphi and lead architect of C# -- publicly released the first version of the .NET Compiler Platform, known as Roslyn, as an open-source project; and it was also there that Scott Guthrie -- Executive Vice President of the Microsoft Cloud and AI group -- announced the official launch of the .NET Foundation, a nonprofit organization aimed to improve open-source software development and collaborative work within the .NET ecosystem. Starting from that pivotal day, the .NET Development team published a constant flow of Microsoft open-source projects on the GitHub platform, including: Entity Framework Core (May 2014), TypeScript (October 2014), .NET Core (October 2014), CoreFX (November 2014), CoreCLR & RyuJIT (January 2015), MSBuild (March 2015), .NET Core CLI (October 2015), Visual Studio Code (November 2015), .NET Standard (September 2016), and so on.

ASP.NET Core 1.x

The most important achievement brought by these efforts towards the open-source development was the public release of ASP.NET Core 1.0, which came out in Q3 2016. It was a complete re-implementation of the ASP.NET Framework that we knew since January 2002 and that had evolved -- without significant changes in its core architecture --- up to version 4.6.2 (August 2016); the brand new framework united all the previous web application technologies, such as MVC, Web API, and web pages, into a single programming module, formerly known as MVC6. The new framework introduced a fully-featured cross-platform component, also known as .NET Core, shipped with the whole set of open-source tools which we mentioned above: a compiler platform (Roslyn), a cross-platform runtime (CoreCLR), and an improved x64 Just-In-Time compiler (RyuJIT). Someone might be wondering about what happened to ASP.NET 5 and Web API 2, as these used to be quite popular names until mid-2016. ASP.NET 5 was no less than the original name of ASP.NET Core, before the developers chose to rename it to emphasize the fact that it is a complete rewrite. The reasons for that, along with the Microsoft vision about the new product, are further explained in the following Scott Hanselman's blog post that anticipated the changes on Jan 16, 2016: http://www.hanselman.com/blog/ASPNET5IsDeadIntroducingASPNETCore10AndNETCore10.aspx For those who don't know, Scott Hanselman is the outreach and community manager for .NET/ASP.NET/IIS/Azure and Visual Studio since 2007. Additional information regarding the perspective switch is also available in the following article by Jeffrey T. Fritz, Program Manager for Microsoft and NuGet team leader: https://blogs.msdn.microsoft.com/webdev/2016/02/01/an-update-on-asp-net-core-and-net-core/ As for Web API 2, it was a dedicated framework for building HTTP services returning pure JSON or XML data instead of web pages. Initially born as an alternative to the MVC platform, it has been merged with the latter into the new, general-purpose web application framework known as MVC6, which is now shipped as a separate module of ASP.NET Core. The 1.0 final release was shortly followed by ASP.NET Core 1.1 (Q4 2016), which brought some new features and performance enhancements, and also addressed many bugs and compatibility issues affecting the former one. The new features include the ability to configure middleware as filters (by adding them to the MVC pipeline rather than the HTTP request pipeline); a built-in, host-independent URL rewrite module, made available through the dedicated  NuGet package; View Components as tag helpers; View compilation at runtime instead of on-demand; .NET native Compression and Caching middleware modules; and so on. For a detailed list of all the new features, improvements and bug fixes of ASP.NET Core 1.1, check out the following links: Release notes: https://github.com/aspnet/AspNetCore/releases/1.1.0 Commits list: https://github.com/dotnet/core/blob/master/release-notes/1.1/1.1-commits.md

ASP.NET Core 2.x

Another major step was taken with ASP.NET Core 2.0, which came out in Q2 2017 as a preview and then in Q3 2017 for the final release. The new version featured a wide number of significant interface improvements, mostly aimed to standardize the shared APIs among the .NET Framework, .NET Core and .NET Standard in order to make the last two more backward-compatible with the former: thanks to these efforts, moving existing .NET Framework projects to .NET Core and/or .NET Standard became a lot easier than before, giving many "traditional" developers the chance to try and adapt to the new paradigm without losing their existing know-how. Again, the major version was shortly followed by an improved and refined one: ASP.NET Core 2.1, officially released on May 30, 2018, introduced a series of additional security & performance improvements and a bunch of new features, including: SignalR, an open-source library that simplifies adding real-time web functionality to .NET Core apps; Razor class libraries, a significant improvement in Razor SDK that allows developers to build views and pages into reusable class libraries and/or library projects that could be shipped as NuGet packages; Identity UI library & scaffolding, to add identity to any app and customize it to meet your needs; HTTPS support enabled by default; built-in GDPR support using privacy-oriented APIs and templates that give users control over their personal data and handle cookie consent; Updated SPA templates for Angular and ReactJS client-side frameworks; and much more. For a detailed list of all the new features, improvements and bug fixes of ASP.NET Core 2.1, check out the following links: Release notes: https://docs.microsoft.com/en-US/aspnet/core/release-notes/aspnetcore-2.1 Commits list: https://github.com/dotnet/core/blob/master/release-notes/2.1/2.1.0-commit.md Wait a minute: did we just say Angular? Yeah, that's right. As a matter of fact, ASP.NET Core has been specifically designed to seamlessly integrate with popular client-side frameworks such as ReactJS and Angular since its initial release: it is precisely for this reason that books like this do actually exist. The major difference introduced in ASP.NET Core 2.1 is that the default Angular and ReactJS templates have been updated to use the standard project structures and build systems for each framework (Angular CLI and NPX's  command) instead of relying on task runners like Grunt or Gulp, module builders like Webpack or toolchains such as Babel, which were widely used in the past although being quite difficult to install and configure. Being able to eliminate the need for these tools was a major achievement, which played a decisive role in revamping the .NET Core usage and growth-rate among the developer communities since 2017. If you take a look at the two previous installments of this book -- ASP.NET Core and Angular 2, published in mid-2016, and ASP.NET Core 2 and Angular 5, out in late-2017 -- and compare their first chapter with this one, you could feel the huge difference between having to manually use Gulp, Grunt or Webpack and relying to the integrated framework-native tools: a substantial reduction in complexity that would greatly benefit any developer, especially those less accustomed to working with those tools. After six months from the release of the 2.1 version, the .NET Foundation came out with a further improvement: ASP.NET Core 2.2 was released on December 4, 2018 with several fixes and new features: an improved endpoint routing system for a better dispatching of requests; updated templates, featuring Bootstrap 4 and Angular 6 support; A new health checks service to monitor the status of deployment environments and their underlying infrastructures, including container-orchestration systems such as Kubernetes; built-in HTTP/2 support in Kestrel; a new SignalR Java Client to ease the usage of SignalR within Android apps;  and so on. For a detailed list of all the new features, improvements and bug fixes of ASP.NET Core 2.2, check out the following links: Release notes: https://docs.microsoft.com/en-US/aspnet/core/release-notes/aspnetcore-2.2 Commits list: https://github.com/dotnet/core/blob/master/release-notes/2.2/2.2.0/2.2.0-commits.md

ASP.NET Core 3.x

ASP.NET Core 3 has been released on September 2019 and comes with another bunch of performance & security improvements and new features, such as: Windows desktop applications support (Windows only), with advanced importing capabilities for Windows Forms and Windows Presentation Foundation (WPF) applications; C# 8 support;  .NET Platform-Dependent Intrinsic access through a new set of build-in APIs, that could bring significant performance improvements in certain scenarios; Single-file executables support via the  command using the  XML element in project configuration or through the  command-line parameter; a new built-in JSON support featuring high-performances and low allocation, arguably 2x-3x faster than the Json.NET third-party library (which became a de-facto standards in most ASP.NET web projects); TLS 1.3 & OpenSSL 1.1.1 support in Linux; some important security improvements in the  namespace, including AES-GCM and AES-CCM ciphers support; and so on. A lot of work has also been done to improve the performance and reliability of the framework when used in a containerized environment. The ASP.NET Core development team put a lot of our effort to improve the .NET Core Docker experience on .NET Core 3.0. More specifically, this is the first release featuring substantive runtime changes to make CoreCLR more efficient, honor Docker resource limits (such as memory and CPU) better by default, and offer more configuration tweaks. Among the various improvements, we could mention an improved memory and GC heaps usage by default, and PowerShell Core, a cross-platform version of the famous automation and configuration tool which is now shipped with the .NET Core SDK Docker container images. Last but not least, it's worth noting that the new .NET Core SDK is much smaller than the previous installments, mostly thanks to the fact that the development team removed from the final build a huge set of non-required artifacts included in the various NuGet packages that were used to assemble the previous SDKs (including ASP.NET Core 2.2), thus wasting a lot of space. The size improvements are huge for Linux and macOS versions, while less noticeable on Windows because that SDK also contains the new WPF and Windows Forms set of platform-specific libraries. For a detailed list of all the new features, improvements and bug fixes of ASP.NET Core 3.0, check out the following links: Release notes: https://docs.microsoft.com/en-us/dotnet/core/whats-new/dotnet-core-3-0 ASP.NET Core 3.0 releases page: https://github.com/dotnet/core/tree/master/release-notes/3.0

Conclusion

That's it, at least for now: I hope that this quick recap will be useful for those who wanted to get a gist of the whole ASP.NET Core history from its birthday to the present days. Read the full article

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[erossiniuk]

Write a reusable Blazor component

In this blog I have already talked about creating components but now I want to start from the beginning and explain how to write a reusable Blazor component from scratch. This is the first part of a Blazor article series to tell how to create a reusable Blazor component. So, we can use them in our Blazor application independently of the hosting model (Web Assembly or Server-side). If you google a bit, you can find a lot of example like that but I can’t find one example that explain exactly how the interaction works. Here, step by step what I understood.

Then, for more documentation, example and components about Blazor, here same links in this blog:

Getting Started With C# And Blazor

Setting Up A Blazor WebAssembly Application

Working With Blazor’s Component Model

Secure Blazor WebAssembly With IdentityServer4

Blazor Using HttpClient With Authentication

InputSelect component for enumerations in Blazor

Use LocalStorage with Blazor WebAssembly

Modal Dialog component for Blazor

Create Tooltip component for Blazor

Consume ASP.NET Core Razor components from Razor class libraries | Microsoft Docs

Also, you can download the source code of this post from GitHub.

So, there result of this post is a simple button. When you click the button, Blazor calls the code in a javascript file and runs it. The result is passed to the C# code and then as result of the component.

Start!

First, I have to create a new Blazor project. For that, Create a new project and search for Blazor. Then, select Blazor WebAssembly App.

Visual Studio 2019 – Create a new project

Then, you have to select the name of the project and its location. The name of my project is PSCBlazor and you can find it on GitHub.

Configure a new project

Select as Target Framework .NET 5. Then, Create.

Addition Information

Now, we have the main project. But to write a reusable Blazor component, we have to create another project for it. Following the same procedure, create a new project but this time select Razor Class Library.

Create a Razor Class Library

Then, follow the instruction. The name of my project is PSCBlazor.SimpleComponent.

If you don’t want to use Visual Studio, you can run from the Command Line

dotnet new razorclasslib

By default, the created project contains several elements:

A predefined “Component1” that is a basic component displaying some styled text in Component1.razor.

A ExampleJsInterop class that demonstrate how to call a basic JS function defined in its own js file in ExampleJsInterop.cs.

The static resources (like png, css and js files) in the “wwwroot” folder: – background.png – exampleJsInterop.js – styles.css

The solution for the custom component

Separate the code from the razor code

Behind the scenes, when you write a razor page, an actual C# class is generated and hopefully the class is partial. It means that it is easy to separate the behavioral code of your component from the html view code.

Single mixed file Component1.razor:

<div class="my-component"> This Blazor component is defined in the <strong>PSCBlazor.SimpleComponent</strong> package. </div> @code { }

Sometimes it is nice to separate the view from the code. In Visual Studio is pretty simple. Create a new Class with the full name of the view file plus cs. For example, if the view is Component1.razor the new file should be Component.razor.cs and automatically Visual Studio understands that this file is part of the view.

Split view and code

Then, a little change in the code because the new class must be a partial class. For example:

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace PSCBlazor.SimpleComponent { public partial class Component1 { } }

Interop between Blazor and JavaScript

Now, I write a reusable component for Blazor and I’m going to modify the component to be able to exchange some data between the component itself and the parent. For that, I have to use a JS function through the generated ExampleJsInterop to prompt the user for a text input.

The component will be used this way with TextValue being a property used in the binding:

<Component1 ParentName=”Some text I want to transmit from the parent to the child component” @bind-Text=”TextValue”> </Component1>

Define the parameters

We need to define a property ParentName to transmit some data from the parent to the child component:

[Parameter] public string ParentName { get; set; }

The Parameter attribute tells that the C# property can be used as component parameter.

Now, I need to define a parameter to be able to transmit data to the child component, but we also want to get data from the component using a @bind property.

To make it possible, I have to define a parameter like the previous one named in our case Text.

[Parameter] public string Text { get; set; }

Define a EventCallback parameter to be able to notify the binding engine that the value has changed. As a convention, the name of the event callback property must be named accordingly to the property you want to bind. In our case it must be named TextChanged.

[Parameter] public EventCallback<string> TextChanged { get; set; }

The name of the event callback can be named differently but in that case it is required to specify it when binding a value using

@bind-{Property}:event=”NameOfPropertyChanged”

It means that the two notation are equivalent when binding a value:

<Child @bind-MyProperty="Text" /> <Child @bind-MyProperty="Text" @bind-MyProperty:event="TextChanged" />

Once the properties are defined, the component will have to invoke the event callback when the property value is changing.

await TextChanged.InvokeAsync(valueOfUserTextInputFromModalDialog);

Inject the appropriate services

To use the Java Script interop and the ExampleJsInterop example class we have to use an injected instance of IJSRuntime. We can do it with a dedicated attribute Inject in the component C# file.

Implement the behavior

Now, I have all we need to implement the behavior by adding a button with a click handler that is going to call the JS function through the ExampleJsInterop.Prompt method. Once we got the result we just need to forward to the TextChanged event call back and to update our Text property value.

So, in the razor file I created a bit of HTML, just to have a bit more fun.

<div class="my-component"> <div class="my-buttonkeeper"> <button class="my-button" @onclick="GetTextAsync">Click me</button> </div> </div> <br /> <text>Text (in the component) : @Text</text> <br />

Then, in the Component1.razor.css I added some CSS code

.my-component { border: 2px dashed red; padding: 1em; margin: 1em 0; background-image: url('background.png'); } .my-buttonkeeper { text-align: center; } .my-button { width: 150px; height: 150px; background-color: green; color: white; font-size: 20px; }

Why? Because I want to be sure the main application adds the CSS from this component but also the javascript we need. I’ll explain that in a second.

Then, it is the moment of the CS file:

private async Task GetTextAsync() { // Call JS interop. var text = await new ExampleJsInterop(JsRuntime).Prompt("Enter some text:"); // Trigger the changed event. await TextChanged.InvokeAsync(text); // Set the property value. Text = text; }

Inside wwwroot directory we have ready to use exampleJsInterop.js file which was created by Visual Studio or CLI. The code is like that

// This is a JavaScript module that is loaded on demand. It can export any number of // functions, and may import other JavaScript modules if required. export function showPrompt(message) { return prompt(message, 'Type anything here'); }

This is a simple javascript function. This rings a bell to me, it is like in React. Now, the magic is happening in the ExampleJsInterop.cs

using Microsoft.JSInterop; using System; using System.Threading.Tasks; namespace PSCBlazor.SimpleComponent { // This class provides an example of how JavaScript functionality can be wrapped // in a .NET class for easy consumption. The associated JavaScript module is // loaded on demand when first needed. // // This class can be registered as scoped DI service and then injected into Blazor // components for use. public class ExampleJsInterop : IAsyncDisposable { private readonly Lazy<Task<IJSObjectReference>> moduleTask; public ExampleJsInterop(IJSRuntime jsRuntime) { moduleTask = new(() => jsRuntime.InvokeAsync<IJSObjectReference>( "import", "./_content/PSCBlazor.SimpleComponent/exampleJsInterop.js").AsTask()); } public async ValueTask<string> Prompt(string message) { var module = await moduleTask.Value; return await module.InvokeAsync<string>("showPrompt", message); } public async ValueTask DisposeAsync() { if (moduleTask.IsValueCreated) { var module = await moduleTask.Value; await module.DisposeAsync(); } } } }

So, between the lines 24 and 28 there is a call via IJSObjectReference to the javascript function in the file under the wwwroot. You can see that in line 21 where there is an import of the javascript file.

Run the demo project

So, almost finish to write a reusable Blazor component with interop with javascript. First, I have to add the component as dependency in the project. In Solution Explorer, right click on Dependecies in the PSCBlazor and click on Add project references… Then, select the component.

Reference manager

Now, open _Imports.razor and add the reference to this component to add this line

@using PSCBlazor.SimpleComponent

Then, open Index.razor and add this code

<Component1 ParentName="This is a test" @bind-Text="_text"></Component1> The text from the component is: @_text @code { private string _text = ""; }

Also, we want to add the CSS and the javascript for the magic. Depending on the hosting model, it is required to add the reference to the CSS and javascript in specific index files in the application project:

wwwroot/index.html for the Web Assembly hosting model.

and

Pages/_Host.cshtml for the Server-side hosting model.

So, open the index.html under wwwroot and add those lines (I deleted a lot of lines for the purpose of showing what you have to add):

<head> <link href="_content/PSCBlazor.SimpleComponent/styles.css" rel="stylesheet" /> </head> <body> <script src="_framework/blazor.webassembly.js"></script> <script src="_content/PSCBlazor.SimpleComponent/exampleJsInterop.js" /> </body>

Basically, in the head I have to add the reference to the CSS from the component. Similarly, I have to do the same to add the javascript.

Compile and run. If everything is ok, you have the same result as I show at the top of this post.

The post Write a reusable Blazor component appeared first on PureSourceCode.

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[prakashsoftwares]

Advantages and disadvantages of Dot NET

Dot NET allows different programming languages and libraries to work together, create Windows-based applications and integrate them with other networked systems. The framework provides programs enabling users to interact with one another's systems rather than the program itself.

Main Advantages of Dot NET:

Dot NET is a cutting edge web development technology. It offers a great set of development tools striving to meet needs of the most demanding customers. Among the main advantages are:

Improved Performance Level

Improved Performance Level is provided due to reduced amount of code necessary for building applications.

ASP.NET Developers in India

Dot NET is Easy to Use

A set of user-friendly tools helps to sufficiently increase programmers' productivity and, as a result, save customer's time and costs.

Independent Multi-Language Support

Dot NET possesses explicit extremely convenient multi-language support. Framework provides binary compatibility between more than 20 languages (C#, C++, VB.NET, Java, Eiffel, FORTRAN, COBOL, ML, Haskell, Pascal, Oberon, Perl, Python, etc.)

Interoperability

Dot NET possesses the ability to interact with programs executed outside the framework due to resources and functionality sharing.

Wide Range Applications can be Developed in Dot NET

These are console applications: Windows Form-based applications / Windows GUI applications, Web and Mobile apps, Pocket PC apps, etc.

Simplified Deployment

With Dot NET one can build applications more rapidly and deploy and maintain them with efficiency. Dot NET ensures that all very important application components are available on the computer or laptop before the application starts working. The Dot NET technology also provides web application developers with automatic deployment.

Hire APS.Net Developers

Reliability

Web application developed in Dot NET is highly reliable due to web server control over the pages on an ongoing basis. Any type of illegal activities or other defects are detected by the server and removed.

Dot NET FRAMEWORK Disadvantages:

While the Dot NET framework advantages usually far outweigh the disadvantages, there are a couple of criticisms worth mentioning:

Windows-only Compatibility

Framework is tightly integrated with Microsoft's operating system and enterprise server software and, as a result, runs only on Windows, restricting vendor choice. For comparison, Java is supported by Windows, Mac and Linux operating systems, and utilizing Java can be easily ported to all operating systems.

Time-consuming Installation

Since its implementation date in 2002 of the Microsoft Dot Net platform structure has become more complicated. As the framework has become larger, the installer did too. The 2009 installer's size is as much as 50 MB; consequently downloading the application can take a considerable amount of time, which causes inconveniences and unnecessary irritation.

Other Installation Troubles

A large number of programs are run on Microsoft's system, and a user may lack the version required. So installing a simple program can be quite challenging. Some users would rather avoid the need to download the framework. Conflicts during Windows installations can also occur and the small fault may cause the framework installation fail. It's also hard to make older applications run in new DotNet environment.

Power-consuming Operation

Microsoft-relied applications tend to consume far more CPU power. This causes a slow and dissatisfactory performance on the less powerful machines.

Whatever the criticism may be Dot NET remains to be a great development platform for a wide range of applications, especially for web-based ones. Moreover, Dot NET has a powerful framework for building rich graphical user interfaces, built-in support for Web services standards and other useful features. It can also cut some expenses for you due to built-in application server in Windows, unified management and less expensive tools.