.net的asp:FileUpload 上传文件

前台代码：    <asp:FileUpload ID="FUpload" runat="server" />
                                                支持图片 <span id="SupportFileTypes"></span><span id="Notice" style="display: none; color: Red;
                                                    width: 100%">正在上传中……</span>

 

后台代码：string serverPath = Server.MapPath("~/Data/AdvertisementImgages/");  //映射服务器的根路径
        string fileName = this.FUpload.FileName;
        if (!System.IO.Directory.Exists(serverPath))
        {
            System.IO.Directory.CreateDirectory(serverPath);
        }
        this.FUpload.SaveAs(serverPath + fileName); //保存图片
        ViewState["Imgages"] = "/Data/AdvertisementImgages/" + fileName;  //数据库里的图片的文件名
        this.imgTrend.ImageUrl = ViewState["Imgages"].ToString();