【www.bbyears.com--代码生成】
using System.IO;using System.Drawing.Imaging;
private void Button1_ServerClick(object sender, System.EventArgs e)
{
Graphics g=null;
System.Drawing.Image upimage=null;
System.Drawing.Image thumimg=null;
System.Drawing.Image simage=null;
Bitmap outputfile=null;
try
{
string extension = Path.GetExtension(File1.PostedFile.FileName).ToUpper();
string filename = DateTime.Now.ToString("yyyyMMddhhmmss");
string smallpath = Server.MapPath(".")+"/smallimg/";
string bigpath = Server.MapPath(".")+"/bigimg/";
int width,height,newwidth,newheight;
System.Drawing.Image.GetThumbnailImageAbort callb =new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);
if(!Directory.Exists(smallpath))
Directory.CreateDirectory(smallpath);
if(!Directory.Exists(bigpath))
Directory.CreateDirectory(bigpath);
Stream upimgfile = File1.PostedFile.InputStream;
string simagefile = Server.MapPath("a8logo.jpg"); //要加水印的文件
simage=System.Drawing.Image.FromFile(simagefile);
upimage= System.Drawing.Image.FromStream(upimgfile); //上传的图片
width = upimage.Width;
height = upimage.Height;
if(width>height)
{
newwidth=200;
newheight =(int)((double)height/(double)width * (double)newwidth);
}
else
{
newheight=200;
newwidth=(int)((double)width/(double)height * (double)newheight);
}
thumimg = upimage.GetThumbnailImage(newwidth,newheight,callb,IntPtr.Zero);
outputfile=new Bitmap(upimage);
g=Graphics.FromImage(outputfile);