#How to save to clipboard xamarin forms pcl

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How to save to clipboard xamarin forms pcl

#How to save to clipboard xamarin forms pcl portable#

#How to save to clipboard xamarin forms pcl for android#

#How to save to clipboard xamarin forms pcl windows#

#How to save to clipboard xamarin forms pcl for android#

The implementation for Android is similar, but before we write any code, we need to give our solution permission to write to the external storage of a device. Note that it's important to include the following line for the DependencyService to work: you can retrieve the saved UI Image as well if needed using Var chartImage = new UIImage(NSData.FromArray(imageData)) ĬhartImage.SaveToPhotosAlbum((image, error) => Public void SavePictureToDisk(string filename, byte imageData) For iOS, this is a relatively straightforward call to the SaveToPhotosAlbum() Method: Each class will handle saving somewhat differently. The next step is to create classes in each of our platform-specific projects to work with IPicture. The usage for the DependencyService is:ĭependencyService.Get().SavePictureToDisk("ChartImage", chart.GetImage()) Ĭreate Classes in Platform-Specific Projects iOS Project We’ll eventually create classes in each platform-specific project for file saving, and our DependencyService will delegate image saving to the appropriate class.

#How to save to clipboard xamarin forms pcl portable#

The portable class library will use a dependency service to call the correct native implementation of the interface. In this manner, we can provide a basic API for saving our byte arrays. Void SavePictureToDisk (string filename, byte imageData) The interface is fairly simple, because we're really only interested in passing the byte array and a filename when we save the image to disk. Fortunately, Xamarin.Forms provides us with the ability to implement a DependencyService, which we use in tandem with our own interface, so we can provide platform-specific implementations for saving our byte array to disk. Assuming we’ve already created a FlexChart object (called “chart” here), the usage to return a byte array is:Ĭreating the byte array is thus quite easy, but saving the image to disk is complicated by the matter of each platform having its own capabilities and file system structure. The first step in this walkthrough is to use GetImage() to return a byte array.

#How to save to clipboard xamarin forms pcl windows#

Though saving an image can be accomplished in a straightforward manner on the native platforms, doing so in Xamarin.Forms requires a more nuanced approach, since it requires accommodating iOS, Android, and Windows Phone all at once. A more obvious scenario is when a user simply wants to preserve a snapshot of data from their mobile application. The GetImage() method is beneficial in any scenario where an image file is easier to work with, such as incorporating graphics into an email, document, or presentation. In this article we cover basic implementation of the GetImage() method of the FlexChart control in a Xamarin.Forms portable class library project, creating an interface for saving the picture to disk, and using a DependencyService to automatically call the correct logic for saving an image based on the platform. One of the most practical features is the GetImage() method, which captures an image of a control as a byte array. I guess my last resort would be to display the configuration information in a XF editor control or such or just copy it to the clipboard (if possible) and have the user manually save the data to a file outside of the application.We have several exciting new features for our existing controls.

I have tried using the System.IO namespace but encountered the same Access Denied error when saving the file to a someplace outside the application.

(A user trying to find the folder here would not be easy.) Saving anyplace else I received an Access Denied error.

I have tried using the FilePicker plug in but could not get it to save to anywhere outside the application.

The file needs to be savable in a place where the user can access / copy it to another device (i.e.

The app itself does not required the device to have a network connection.

It needs to work on all supported Xamarin Forms platforms - UWP, Android, iOS and Mac.

This will prevent the users from re-entering all the configuration information on each device where they wish to run the app. Additionally, the app can be run on multiple computers by the same user (There are valid business reasons for doing this.) What I would like to be able to do is backup the configuration of the app to a file that can then be used on another device to automatically configure the app on the new device in exactly the same way. My Xamarin forms app required the user to perform a certain amount of configuration before it can be used.