如何将字节数组转换为ImageSource的Windows8.0应用程序 [英] How to Convert byte array to ImageSource for Windows 8.0 store application

问题描述

我正在使用Windows 8商店应用程序。我是新的。

我收到一个以字节数组形式的图片（byte []）。

我必须将其转换回Image并显示在Image Control中。

到目前为止，我在屏幕上有按钮和图像控制。当我点击按钮，我调用以下函数

  private async任务LoadImageAsync（）
 {
 byte [ ] code = //为字节数组调用第三方API 
 System.IO.MemoryStream ms = new MemoryStream（code）; 
 var bitmapImg = new Windows.UI.Xaml.Media.Imaging.BitmapImage（）; 
 
 Windows.Storage.Streams.InMemoryRandomAccessStream imras = new Windows.Storage.Streams.InMemoryRandomAccessStream（）; 
 
 Windows.Storage.Streams.DataWriter write = new Windows.Storage.Streams.DataWriter（imras.GetOutputStreamAt（0））; 
 write.WriteBytes（code）; 
 await write.StoreAsync（）; 
 bitmapImg.SetSourceAsync（imras）; 
 pictureBox1.Source = bitmapImg; 
} 
  

这不能正常工作。任何想法？
当我调试时，我可以看到以毫秒为单位的字节数组。但它不会被转换为bitmapImg。

解决方案

我在 Codeproject

  public class ByteImageConverter 
 {
 public static ImageSource ByteToImage（byte [] imageData）
 {
 BitmapImage biImg = new BitmapImage（）; 
 MemoryStream ms = new MemoryStream（imageData）; 
 biImg.BeginInit（）; 
 biImg.StreamSource = ms; 
 biImg.EndInit（）; 
 
 ImageSource imgSrc = biImg as ImageSource; 
 
 return imgSrc; 
} 
} 
  

b $ b

I am working on Windows 8 store application. I am new at it.

I am receiving an image in the form of byte array (byte []).

I have to convert this back to Image and display it in Image Control.

so far I have button and Image control on Screen. When I click button, I call following function

private async Task LoadImageAsync()
{
    byte[] code = //call to third party API for byte array
    System.IO.MemoryStream ms = new MemoryStream(code);
    var bitmapImg = new Windows.UI.Xaml.Media.Imaging.BitmapImage();

    Windows.Storage.Streams.InMemoryRandomAccessStream imras = new Windows.Storage.Streams.InMemoryRandomAccessStream();

    Windows.Storage.Streams.DataWriter write = new Windows.Storage.Streams.DataWriter(imras.GetOutputStreamAt(0));
    write.WriteBytes(code);
    await write.StoreAsync();
    bitmapImg.SetSourceAsync(imras);
    pictureBox1.Source = bitmapImg;
}

This is not working properly. any idea? When I debug, I can see the byte array in ms. but it is not getting converted to bitmapImg.

解决方案

I found the following on Codeproject

public class ByteImageConverter
{
    public static ImageSource ByteToImage(byte[] imageData)
    {
        BitmapImage biImg = new BitmapImage();
        MemoryStream ms = new MemoryStream(imageData);
        biImg.BeginInit();
        biImg.StreamSource = ms;
        biImg.EndInit();

        ImageSource imgSrc = biImg as ImageSource;

        return imgSrc;
    }
}

This should work fort you.

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