CODEWITHSUNDEEP
c#windows-runtimewindows-phone-8.1
user3758386
user3758386

Reputation: 83

Save image in windows phone 8.1 using FileSavePicker

I want to save an image using File Save Picker . I am using this link to save but it is only for text , how I modify it to save an image?

Upvotes: 3

Views: 2794

Answers (1)

Romasz
Romasz

Reputation: 29792

As you have provided the link then I assume that you managed to get StorageFile after Continuation (this is how it works at WP8.1 Runtime).

I also assume that you have a Stream with your image or you know how to obtain such a one. Basing on those two, you can save your image in png format to a file selected by picker for example like this:

public async Task SaveStreamAsync(IRandomAccessStream streamToSave, StorageFile destination)
{
    BitmapDecoder bmpDecoder = await BitmapDecoder.CreateAsync(streamToSave);
    PixelDataProvider pixelData = await bmpDecoder.GetPixelDataAsync(BitmapPixelFormat.Rgba8, BitmapAlphaMode.Straight, null, ExifOrientationMode.RespectExifOrientation, ColorManagementMode.DoNotColorManage);
    using (var destFileStream = await destination.OpenAsync(FileAccessMode.ReadWrite))
    {
        BitmapEncoder bmpEncoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, destFileStream);
        uint yourWidthAndOrHeight = 1024;
        bmpEncoder.SetPixelData(BitmapPixelFormat.Rgba8, BitmapAlphaMode.Straight, yourWidthAndOrHeight, yourWidthAndOrHeight, 300, 300, pixelData.DetachPixelData());
        await bmpEncoder.FlushAsync();
    }
}

Also please remember to Dispose your streamToSave (and other resources) after finishing working with them.

If you take a look at BitmapEncoder and BitmapDecoder classes, then you will see more options including transformation and various properties.

(I've not tested the code above rough, but hopefully it will work fine)

Upvotes: 3

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