判断上传文件格式和容量

        string fullFileName = this.FileUp.PostedFile.FileName; //获取上传文件的全名
       
       string type = fullFileName.Substring(fullFileName.LastIndexOf(".") + 1); //获取上传文件的类型 

         if ((type == "jpg" || type == "jpeg" || type == "gif" || type == "png" || type == "swf" || type == "rar" || type == "zip") && FileUp.PostedFile.ContentLength < 2 * 1024 * 1024)//判断文件的类型
            {
                this.FileUp.PostedFile.SaveAs(Server.MapPath("../UpFiles/") + "\\" + fileName);
                this.UploadPan.Visible = false;
                this.UploadedPan.Visible = true;
               this.CopyTxt.Value = "../UpFiles/" + fileName;            
            } 
            else
            {
                this.message.Text = "文件格式不正确/或者文件过大!";
            }