.net上傳圖檔檔案，生成縮略圖，并寫上版權資訊

.net上傳圖檔檔案，生成縮略圖，并寫上版權資訊

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

   {

    if(File1.PostedFile.FileName!=null)

    {    

    string namestr = Path.GetFileName(File1.PostedFile.FileName);//提取檔案名   

    File1.PostedFile.SaveAs(Server.MapPath(".")[email protected]"/"+namestr);

    Image2.Visible=true;

    Image2.ImageUrl=Server.MapPath(".")[email protected]"/"+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);//寫版權資訊及文本格式及位置

    output.Save(Server.MapPath(".")[email protected]"/s_"+namestr,System.Drawing.Imaging.ImageFormat.Jpeg);

    Image1.Visible=true;

    Image1.ImageUrl=Server.MapPath(".")[email protected]"/s_"+namestr;

    }

   }

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