FileUpLoad上传图片

protected void Button1_Click(object sender, EventArgs e) {

       bool Files = false; //判断文件的类型是否符合要求

       if(this .FileUpload1.HasFile) {

           //获取删除文件的后缀

           string fileSuffix = System.IO.Path.GetExtension(this .FileUpload1.FileName).ToLower();

           string[] Suffix={".jpg",".bmp",".gif","pnd"}; //判断文件是否符合要求

            for (int i = 0; i < Suffix.Length;i++) {

                      if (fileSuffix == Suffix[i]) { Files = true; } }

              } //如果符合要求就上次,并显示信息

           if (Files == true)

          {

                 this.Image1.ImageUrl = "~/imager/" + FileUpload1.FileName;

                 this.FileUpload1.SaveAs(Server.MapPath("~/imager/") + FileUpload1.FileName);

          } else {

              Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "");

         }

 }