public override void SaveToStream(Stream aStream, int aStart, int aEnd)
{
base.SaveToStream(aStream, aStart, aEnd);
// 图像不能直接写流，会导致流前面部分数据错误
using (MemoryStream vImgStream = new MemoryStream())
{
using (Bitmap bitmap = new Bitmap(FImage)) // 解决GDI+ 中发生一般性错误，因为该文件仍保留锁定对于对象的生存期
{
bitmap.Save(vImgStream, ImageFormat.Bmp);
}
// write bitmap data size
uint vSize = (uint)vImgStream.Length;
byte[] vBuffer = BitConverter.GetBytes(vSize);
aStream.Write(vBuffer, 0, vBuffer.Length);
vBuffer = new byte[vImgStream.Length];
vImgStream.Seek(0, SeekOrigin.Begin);
vImgStream.Read(vBuffer, 0, vBuffer.Length);
aStream.Write(vBuffer, 0, vBuffer.Length);
}
FShapeManager.SaveToStream(aStream);
}
public override void SaveToStreamRange(Stream aStream, int aStart, int aEnd)
{
base.SaveToStreamRange(aStream, aStart, aEnd);
// 图像不能直接写流，会导致流前面部分数据错误
using (MemoryStream vImgStream = new MemoryStream())
{
using (Bitmap vBitmap = new Bitmap(FImage.Width, FImage.Height)) // 解决GDI+ 中发生一般性错误，因为该文件仍保留锁定对于对象的生存期
{
using (Graphics vGraphic = Graphics.FromImage(vBitmap))
{
vGraphic.Clear(Color.White);
vGraphic.DrawImage(FImage, 0, 0);
}
vBitmap.Save(vImgStream, ImageFormat.Bmp);
}
// write bitmap data size
uint vSize = (uint)vImgStream.Length;
byte[] vBuffer = BitConverter.GetBytes(vSize);
aStream.Write(vBuffer, 0, vBuffer.Length);
vBuffer = new byte[vImgStream.Length];
vImgStream.Seek(0, SeekOrigin.Begin);
vImgStream.Read(vBuffer, 0, vBuffer.Length);
aStream.Write(vBuffer, 0, vBuffer.Length);
}
FShapeManager.SaveToStream(aStream);
}