多文件上传

页面中添加了三个File控件

private   void  Button1_Click( object  sender, System.EventArgs e)
         {
            if(this.File1.PostedFile.FileName==""&&this.File2.PostedFile.FileName==""&&this.File3.PostedFile.FileName=="")
            {
                this.lbl_info.Text="请输入文件";

                                          }
            else
            {
                HttpFileCollection myFiles=Request.Files;
                for(int i=0;i<myFiles.Count;i++)
                {
                    HttpPostedFile myPost=myFiles[i];
                    try
                    {
                        if(myPost.ContentLength>0)
                        {
                            string filepath=myPost.FileName;
                            string filename=filepath.Substring(filepath.LastIndexOf("\\")+1);
                            string serverpath=Server.MapPath("images/")+filename;
                            myPost.SaveAs(serverpath);
                            this.lbl_info.Text="上传成功";
                        }
                    }
                    catch(Exception error)
                    {
                        Response.Write("你的错误原因："+error.Message);
                    }
                }
            }

        }