public void GreateMiniImage(string oldpath, string newpath, int tWidth, int tHeight)
{
try
{
System.Drawing.Image image = System.Drawing.Image.FromFile(oldpath);
double bl = 1d;
if ((image.Width <= image.Height) && (tWidth >= tHeight))
{
bl = Convert.ToDouble(image.Height) / Convert.ToDouble(tHeight);
}
else if ((image.Width > image.Height) && (tWidth < tHeight))
{
bl = Convert.ToDouble(image.Width) / Convert.ToDouble(tWidth);
}
else if ((image.Width <= image.Height) && (tWidth <= tHeight))
{
if (image.Height / tHeight >= image.Width / tWidth)
{
bl = Convert.ToDouble(image.Width) / Convert.ToDouble(tWidth);
}
else
{
bl = Convert.ToDouble(image.Height) / Convert.ToDouble(tHeight);
}
}
else
{
if (image.Height / tHeight >= image.Width / tWidth)
{
bl = Convert.ToDouble(image.Height) / Convert.ToDouble(tHeight);
}
else
{
bl = Convert.ToDouble(image.Width) / Convert.ToDouble(tWidth);
}
}
Bitmap b = new Bitmap(image, Convert.ToInt32(image.Width / bl), Convert.ToInt32(image.Height / bl));
//保存本地
b.Save(newpath);
//输出客户端
System.IO.MemoryStream ms = new System.IO.MemoryStream();
b.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
Response.ClearContent();
Response.ContentType = "image/Gif";
Response.BinaryWrite(ms.ToArray());
b.Dispose();
image.Dispose();
}
catch
{
}
}