Silverlight 4中：我如何转换BMP字节数组PNG字节数组？ [英] Silverlight 4: How can I convert bmp byte array to png byte array?

问题描述

我有它返回的byte []一个bmp WCF服务。然而Silverlight中的Image控件犯规支持BMP显示的，所以我需要在BMP的byte []转换成PNG或JPG格式的byte []。是否有一个图书馆在那里它做到这一点的转换？或Silverlight客户端上显示BMP字节[]的任何其他方式？

谢谢！

UPDATE1

为了实现我会做这样的事情在.NET

转换

 专用字节[] ConvertBmpToJpeg（字节[] BMP）使用
 {
（System.Drawing.Image对象图像= System.Drawing.Image.FromStream（新的MemoryStream （BMP）））
 {
的MemoryStream毫秒=新的MemoryStream（）; 
 image.Save（MS，ImageFormat.Jpeg）; 
返回ms.ToArray（）; 
} 
} 
  

由于System.Drawing中不可用在Silverlight，如何？我实现上面的代码确实在Silverlight是什么

答是由DJ提到的库
低于KRAZE -

  ExtendedImage IMG =新ExtendedImage（）; 
变种BD =新BmpDecoder（）; 
无功济=新JpegEncoder（）; 
 bd.Decode（IMG，新的MemoryStream（bitmapBytes））; 
的MemoryStream毫秒=新的MemoryStream（）; 
 je.Encode（IMG，MS）; 
 
 BitmapImage的双向=新的BitmapImage（）; 
 bi.SetSource（新的MemoryStream（ms.ToArray（）））; 
 display_ScreenShot.Source =双向; 
  

解决方案

下面是做的更简单的方法..
这个网站可以帮助了很多

的图像转换

I have a wcf service which returns a bmp in byte[]. However Silverlight's Image control doesnt support displaying bmp's so i need to convert the bmp byte[] to png or jpg byte[]. Is there a library out there which does this conversion? Or any other way of displaying the bmp byte[] on the silverlight client?

Thanks!

Update1

In order to achieve the conversion I would have done something like this in .NET

private byte[]  ConvertBmpToJpeg(byte[] bmp)
{
    using (System.Drawing.Image image = System.Drawing.Image.FromStream(new MemoryStream(bmp)))
    {
        MemoryStream ms = new MemoryStream();                
        image.Save(ms, ImageFormat.Jpeg);
        return ms.ToArray();
    }
 }

Since System.Drawing is not available in Silverlight, how do I achieve what the code does above in Silverlight?

Answer using the library mentioned by dj kraze below-

        ExtendedImage img = new ExtendedImage();
        var bd = new BmpDecoder();
        var je = new JpegEncoder();
        bd.Decode(img, new MemoryStream(bitmapBytes));
        MemoryStream ms = new MemoryStream();
        je.Encode(img, ms);

        BitmapImage bi = new BitmapImage();
        bi.SetSource(new MemoryStream(ms.ToArray()));
        display_ScreenShot.Source = bi;

解决方案

Here is an even easier way of doing it.. This site may help out a lot

Image Converting

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