根据WPF 完美截图 <一>总结:

1.BitmapSource与BitmapImage及CorppedBitmap之间的转换

2.中心及边角的模板实现及其拖动

3.除了拖动矩形外区域要实现遮罩,遮罩的实现

今天实现第一个技术点,各类型间的转换,代码均为网上搜集。

BitmapSourceToBitmapImage转换:

     private BitmapImage BitmapSourceToBitmapImage(BitmapSource bitmapSource)
{
var encoder = new JpegBitmapEncoder();
var memoryStream = new MemoryStream();
var bImg = new BitmapImage(); encoder.Frames.Add(BitmapFrame.Create(bitmapSource));
encoder.Save(memoryStream); bImg.BeginInit();
bImg.StreamSource = new MemoryStream(memoryStream.ToArray());
bImg.EndInit(); memoryStream.Close(); return bImg;
}

ByteArrayToBitmapImage转换:

       private BitmapImage ByteArrayToBitmapImage(byte[] byteArray)
{
BitmapImage bmp = null; try
{
bmp = new BitmapImage();
bmp.BeginInit();
bmp.StreamSource = new MemoryStream(byteArray);
bmp.EndInit();
}
catch
{
bmp = null;
} return bmp;
}

BitmapImageToByteArray转换:

      private byte[] BitmapImageToByteArray(BitmapImage bmp)
{
byte[] byteArray = null;
try
{
Stream sMarket = bmp.StreamSource;
if (sMarket != null && sMarket.Length > )
{
sMarket.Position = ;
using (BinaryReader br = new BinaryReader(sMarket))
{
byteArray = br.ReadBytes((int)sMarket.Length);
}
}
}
catch
{
//other exception handling
}
return byteArray;
}
05-04 07:21