以下是代码：

  1. protected void Button1_Click(object sender, EventArgs e)   
  2.  {       
  3.  this.DownLoadFile("说明.txt");    
  4. }    
  5. //下载函数   
  6.  private void DownLoadFile(string fileName)  
  7.   {         
  8.  string filePath = Server.MapPath(".") + "\\" + fileName;       
  9.  if (File.Exists(filePath))       
  10.  {           
  11.  FileInfo file = new FileInfo(filePath);           
  12.  Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8"); //解决中文乱码            
  13. Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name)); //解决中文文件名乱码                
  1. Response.AddHeader("Content-length", file.Length.ToString());  
  3.   Response.ContentType = "appliction/octet-stream";      
  5.       Response.WriteFile(file.FullName);    
  7.         
  8. Response.End();       
  9.  }   
  10.  }

 

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