private void Button1_Click(object sender, System.EventArgs e)

{

if(File1.PostedFile.FileName!=null)

{

string namestr = Path.GetFileName(File1.PostedFile.FileName);//提取文件名

File1.PostedFile.SaveAs(Server.MapPath(".")+@"\"+namestr);

Image2.Visible=true;

Image2.ImageUrl=Server.MapPath(".")+@"\"+namestr;

System.Drawing.Image image,aNewImage;

image=System.Drawing.Image.FromStream(File1.PostedFile.InputStream);

decimal width=image.Width;

decimal height=image.Height;

int newwidth,newheight;

if(width>height)

{

newwidth=150;

newheight=(int)(height/width*150);

}

else

{

newheight=150;

newwidth=(int)(width/height*150);

}

aNewImage=image.GetThumbnailImage(newwidth,newheight,null,IntPtr.Zero);

Bitmap output=new Bitmap(aNewImage);

Graphics g=Graphics.FromImage(output);

g.DrawString(TextBox1.Text.Trim(),new Font("Courier New", 9),new SolidBrush(Color.Red),60,60);//写版权信息及文本格式及位置

output.Save(Server.MapPath(".")+@"\s_"+namestr,System.Drawing.Imaging.ImageFormat.Jpeg);

Image1.Visible=true;

Image1.ImageUrl=Server.MapPath(".")+@"\s_"+namestr;

}

}