ASP.NET使用fileupload控件上传图片

 protected void btnAddImage_Click(object sender, EventArgs e)
        {
            try
            {
                if (fileUploadImage.PostedFile.FileName == "")
                {
                    this.lblinfo.Text = "请选择文件！";

                }
                else
                {
                    string filepath = fileUploadImage.PostedFile.FileName;
                    string filename = filepath.Substring(filepath.LastIndexOf("/") + 1);
                    string serverpath = Server.MapPath("~/IMAGE/") + filename;
                    string imgExtendName = (filename.Substring(filename.IndexOf(".") + 1)).ToLower();
                    if (imgExtendName == "jpg" || imgExtendName == "gif" || imgExtendName == "png" || imgExtendName == "bmp")
                    {
                        fileUploadImage.SaveAs(serverpath);//int FileLen = this.FileUpload1.PostedFile.ContentLength;


                        int FileLen = this.fileUploadImage.PostedFile.ContentLength;
                        Byte[] FileData = new Byte[FileLen];
                        HttpPostedFile hp = fileUploadImage.PostedFile;//创建访问客户端上传文件的对象  
                        Stream sr = hp.InputStream;//创建数据流对象
                        sr.Read(FileData, 0, FileLen);//将图片数据放到FileData数组对象实例中,其中0代表数组指针的起始位置,FileLen表示要读取流的长度(指针的结素位置)image文件夹
                        string insertSql = "insert into image(userid,imggroup,img) values(1,1,@img)";
                        UserBll ub = new UserBll();
                        this.userImage.ImageUrl = @"/IMAGE/" + filename;
                        int flag=ub.ExecuteNonQuery(FileData,insertSql);
                        Response.Write(flag);