在ASP.NET中将图像添加到SQL数据库时出现问题

ALTER PROCEDURE pr_INSRT_Img (@Img image, @name varchar(50))
AS
BEGIN
    UPDATE usr
    SET Img= @Img
    WHERE disp_nm = @name
END

INSERT

protected void OnUpdateComplete(object sender, EventArgs e)
        {
            Image ImgUser = new Image();
            AsyncFileUpload asyncSender = new AsyncFileUpload();
            UpdatePanel pnlinfo = new UpdatePanel();
            AsyncFileUpload asyncGv = new AsyncFileUpload();
            Accordion accordion = new Accordion();
            Label lblName = new Label();

            //finding the row of the sender
            asyncSender = (AsyncFileUpload)sender;

            foreach (GridViewRow Row in gvData.Rows)
            {
                accordion = (Accordion)Row.Cells[0].FindControl(\"Accordion\");
                asyncGv = (AsyncFileUpload)accordion.FindControl(\"AsyncFileUpload\");
                if (asyncSender.ClientID == asyncGv.ClientID)
                {
                    ImgUser = (Image)accordion.FindControl(\"imgUser\");
                    ImgUser.ImageUrl = asyncGv.FileName;
                    lblName = (Label)Row.Cells[0].FindControl(\"lblPnlName\");
                    bool IsWorking = InsertImage(asyncGv.FileBytes, lblName.Text);
                    pnlinfo = (UpdatePanel)Row.Cells[0].FindControl(\"pnlInfo\");
                    pnlinfo.Update();
                    break;
                }
            }

    //pr_INSRT_Img
    SqlCommand cmd = new SqlCommand(ConfigManager.InsertImage);
    cmd.CommandType = CommandType.StoredProcedure;

    //set the parameters
    cmd.Parameters.Add(\"@Img\", SqlDbType.Image).Value = ImgData;
    cmd.Parameters.Add(\"@name\", SqlDbType.VarChar).Value = Name;

    int ifWorks = DBUtils.ExecuteCmdScalar(cmd, ConfigManager.PhonebookSQLConnectionString);

    if (ifWorks != 0)
        return true;
    else
        return false;

<div runat=\"server\" class=\"divRow\" style=\"text-align:center; width:300px; float:left;\">
                                        <asp:Accordion ID=\"Accordion\" runat=\"server\" FadeTransitions=\"true\" FramesPerSecond=\"40\" TransitionDuration=\"250\" 
                                            AutoSize=\"None\" SelectedIndex=\"-1\" RequireOpenedPane=\"false\" SuppressHeaderPostbacks=\"true\" Height=\"50px\" Width=\"360px\">
                                            <Panes>
                                                <asp:AccordionPane ID=\"AccordionPane\" runat=\"server\">
                                                    <Header>
                                                        <asp:Image ID=\"imgUser\" runat=\"server\" ImageAlign=\"Middle\" ImageUrl=\"~/silhouette.jpg\"
                                                            Width=\"100px\" Height=\"100px\" EnableViewState=\"true\"/>
                                                    </Header>
                                                    <Content>
                                                        <asp:AsyncFileUpload ID=\"AsyncFileUpload\" runat=\"server\" OnUploadedComplete=\"OnUpdateComplete\" />
                                                    </Content>
                                                </asp:AccordionPane>
                                            </Panes>
                                        </asp:Accordion>
                                        <asp:Button ID=\"btnUpdate\" runat=\"server\" OnClick=\"btnUpdate_Click\" Visible=\"false\"  />
                                    </div><br /><br />