在图片上加水印有点问题
//add_certify.aspx页面的内容如下: 
  <%@   Page      Language= "C# "      ResponseEncoding= "gb2312 "   src= "add_certify.aspx.cs "   Inherits= "namespace.classname "%>     
  <script   runat= "server ">  
 protected   void   Page_load(Object   Src,   EventArgs   E)    
 { 
 ................ 
 } 
 void   UploadBtn_Click(Object   sender,EventArgs   e) 
 {    
 AddTextToImg( "../img/1.gif ", "Family.Man ");    
 } 
  </script>    
 //add_certify.aspx.cs页面的内容如下: 
 using   System.Drawing;    
 using   System.IO;    
 using   System.Drawing.Imaging;      
 private   void   AddTextToImg(string   fileName,string   text)    
 {    
  if(!File.Exists(MapPath(fileName)))    
  {    
   throw   new   FileNotFoundException( "The   file   don 't   exist! ");    
  }      
  if(   text   ==   string.Empty   )    
  {    
   return;    
  }    
  //还需要判断文件类型是否为图像类型,这里就不赘述了      
  System.Drawing.Image   image   =   System.Drawing.Image.FromFile(MapPath(fileName));    
  Bitmap   bitmap   =   new   Bitmap(image,image.Width,image.Height);    
  Graphics   g   =   Graphics.FromImage(bitmap);      
  float   fontSize   =   12.0f;   //字体大小    
  float   textWidth   =   text.Length*fontSize;   //文本的长度    
  //下面定义一个矩形区域,以后在这个矩形里画上白底黑字    
  float   rectX   =   0;    
  float   rectY   =   0;    
  float   rectWidth   =   text.Length*(fontSize+8);    
  float   rectHeight   =   fontSize+8;    
  //声明矩形域    
  RectangleF   textArea   =   new   RectangleF(rectX,rectY,rectWidth,rectHeight);      
  Font   font   =   new   Font( "宋体 ",fontSize);   //定义字体    
  Brush   whiteBrush   =   new   SolidBrush(Color.White);   //白笔刷,画文字用    
  Brush   blackBrush   =   new   SolidBrush(Color.Black);   //黑笔刷,画背景用      
  g.FillRectangle(blackBrush,rectX,rectY,rectWidth,rectHeight);      
  g.DrawString(text,font,whiteBrush,textArea);    
  MemoryStream   ms   =   new   MemoryStream(   );    
  //保存为Jpg类型    
  bitmap.Save(ms,ImageFormat.Jpeg);      
  //输出处理后的图像,这里为了演示方便,我将图片显示在页面中了    
  Response.Clear();    
  Response.ContentType   =    "image/jpeg ";    
  Response.BinaryWrite(   ms.ToArray()   );      
  g.Dispose();     
  bitmap.Dispose();    
  image.Dispose();    
 }      
 我对c#不是很熟悉(上面这些是用在web上的),我调试的时候的错误信息是: 
 编译器错误信息:   CS0116:   命名空间并不直接包含诸如字段或方法之类的成员
------解决方案--------------------
------解决方案--------------------友情帮定一下
------解决方案--------------------using System; 
 using System.Drawing; 
 using System.Drawing.Imaging; 
 using System.Drawing.Drawing2D;   
 namespace Tutorial 
 { 
 	class WaterMark 
 	{   
 		[STAThread] 
 		static void Main(string[] args) 
 		{ 
 			//set a working directory 
 			string WorkingDirectory = @ "C:\Documents and Settings\administrator.JAZZMINE\My Documents\Projects\Tutorials\WaterMark ";