问题描述
我正在将BitmapImage保存到一个byte []中以保存在数据库中.我很确定数据可以准确地保存和检索，所以这不是问题.
I'm saving a BitmapImage to a byte[] for saving in a DB. I'm pretty sure the data is being saved and retrieved accurately so it's not an issue there.
在我的将byte []转换为BitmapImage的过程中，我不断遇到"System.NotSupportedException:未找到适合完成此操作的成像组件"的异常.
On my byte[] to BitmapImage conversion I keep getting an exception of "System.NotSupportedException: No imaging component suitable to complete this operation was found."
有人可以在这里看到我的两个功能在做什么吗?
Can anyone see what I'm doing wrong with my two functions here?
private Byte[] convertBitmapImageToBytestream(BitmapImage bi)
{
int height = bi.PixelHeight;
int width = bi.PixelWidth;
int stride = width * ((bi.Format.BitsPerPixel + 7) / 8);
Byte[] bits = new Byte[height * stride];
bi.CopyPixels(bits, stride, 0);
return bits;
}
public BitmapImage convertByteToBitmapImage(Byte[] bytes)
{
MemoryStream stream = new MemoryStream(bytes);
stream.Position = 0;
BitmapImage bi = new BitmapImage();
bi.BeginInit();
bi.StreamSource = stream;
bi.EndInit();
return bi;
}
推荐答案
结果证明，位图图像CopyPixels不正确.我将bitmapimage的输出转换为可用的图片(在这种情况下为jpg).
Turns out the bitmapimage CopyPixels isn't right. I take the output of the bitmapimage and convert it to something usable in this case a jpg.
public static Byte[] convertBitmapImageToBytestream(BitmapImage bi)
{
MemoryStream memStream = new MemoryStream();
JpegBitmapEncoder encoder = new JpegBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bi));
encoder.Save(memStream);
byte[] bytestream = memStream.GetBuffer();
return bytestream;
}
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