上传图片并修改其大小

  //thefile是一个File Field HTML 控件


  thefile.PostedFile.SaveAs(System.Web.HttpContext.Current.Server.MapPath("temp.png"));


  MemoryStream MemStream=new MemoryStream();


  System.Drawing.Image imgOutput =System.Drawing.Bitmap.FromFile(System.Web.HttpContext.Current.Server.MapPath("temp.png"));


  //修改成80×80大小

  System.Drawing.Image imgOutput2=imgOutput.GetThumbnailImage(80,80,null,IntPtr.Zero);


  imgOutput2.Save(System.Web.HttpContext.Current.Server.MapPath("image.png"), ImageFormat.Png);


  Response.Write(thefile.PostedFile.FileName);


  Response.Write("Len:"+MemStream.Length.ToString());


  imgOutput.Dispose();
  imgOutput2.Dispose();

  Response.Write("上传成功!");


  Response.Write(System.Web.HttpContext.Current.Server.MapPath("image.png"));

本文转载:CSDN博客