c# - 将 BitmapSource 转换为 MemoryStream

Question

如何将 BitmapSource 转换为 MemoryStream。虽然我尝试了一些代码:

private Stream StreamFromBitmapSource(BitmapSource writeBmp)
{
    Stream bmp;
    using (bmp = new MemoryStream())
    {                    
        BitmapEncoder enc = new BmpBitmapEncoder();
        enc.Frames.Add(BitmapFrame.Create(writeBmp));
        enc.Save(bmp);                                     
    }

   return bmp;
}

它没有给出任何错误，但在放置调试点后，它显示了下面列出的一些异常。

Capacity: 'printStream.Capacity' threw an exception of type 'System.ObjectDisposedException' Length: 'printStream.Length' threw an exception of type 'System.ObjectDisposedException' Position: 'printStream.Position' threw an exception of type 'System.ObjectDisposedException'

Answer 1

using (bmp = new MemoryStream())原因 bmp最终使用块销毁对象。你回来 bmp被破坏的变量。

删除使用:

private Stream StreamFromBitmapSource(BitmapSource writeBmp)
{
    Stream bmp = new MemoryStream();

    BitmapEncoder enc = new BmpBitmapEncoder();
    enc.Frames.Add(BitmapFrame.Create(writeBmp));
    enc.Save(bmp);                                             

   return bmp;
}