Add Watermark Text to Images in FormView using C# in ASP.Net

hello,

i want use this watermark:

http://www.aspsnippets.com/Articles/Create-Add-Watermark-Text-to-Images-Photo-in-ASPNet-using-C-and-VBNet.aspx

but i want used in formview, please how i changed code in C# ?

and this is my FormView:

Asp.net

<asp:FormView ID="FormView1" runat="server" DataKeyNames="id"
                DataSourceID="SqlDataSource1" DefaultMode="Insert" Width="1200px">

                <InsertItemTemplate>

                    <table class="style1">

                

                        <tr>
                            <td valign="top" class="style5">ناونیشان:</td>
                            <td>
                                <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("title") %>'
                                    Width="400px"></asp:TextBox>
                                <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"
                                    ControlToValidate="TextBox1" ErrorMessage="تکایە ناونیشان داخڵ بکە !"
                                    ValidationGroup="VG1">*</asp:RequiredFieldValidator>
                            </td>
                        </tr>


                        <tr>
                            <td valign="top" class="style5">درێژە:</td>
                            <td>
                                <telerik:RadEditor ID="RadEditor1" runat="server" Style="width: 100%; font-family: 'Droid Arabic Kufi'; font-size: 10px; direction: rtl; text-align: right"
                                    Content='<%# Bind("Detail") %>' Skin="Sunset" ImageManager-EnableImageEditor="true" ImageManager-DeletePaths="~/Files/Images" ImageManager-UploadPaths="~/Files/Images" ImageManager-ViewPaths="~/Files/Images" AllowScripts="true">
                                    <Content>
                                    </Content>
                                    <ImageManager DeletePaths="~/Files/Images"
                                        ImageEditorHttpHandlerUrl="~/Files/Images"
                                        UploadPaths="~/Files/Images" ViewPaths="~/Files/Images"
                                        MaxUploadFileSize="4000000" />

                                    <CssFiles>
                                        <telerik:EditorCssFile Value="~/AdpanelYoga/EditorContentArea.css" />
                                    </CssFiles>

                                    <DocumentManager DeletePaths="~/Files/Documents" MaxUploadFileSize="4000000"
                                        UploadPaths="~/Files/Documents" ViewPaths="~/Files/Documents" />
                                    <FlashManager DeletePaths="~/Files/Flash" MaxUploadFileSize="4000000"
                                        UploadPaths="~/Files/Flash" ViewPaths="~/Files/Flash" />
                                    <MediaManager DeletePaths="~/Files/Media" MaxUploadFileSize="4000000"
                                        UploadPaths="~/Files/Media" ViewPaths="~/Files/Media" />

                                </telerik:RadEditor>
                            </td>
                        </tr>


                        <tr>
                            <td valign="top" class="style5">وێنە:</td>
                            <td>
                                 <asp:FileUpload ID="FileUpload1" runat="server" style="margin-right: 0px" />
                                                           
                            </td>
                        </tr>

                     

                        <tr>
                            <td valign="top" class="style5">&nbsp;</td>
                            <td>


                                <telerik:RadButton ID="Button1" runat="server" Text="ناردن" CommandName="Insert" ValidationGroup="VG1" Skin="Office2007">
                                    <Icon PrimaryIconCssClass="rbSave" PrimaryIconLeft="4" PrimaryIconTop="4" />
                                </telerik:RadButton>


                                <telerik:RadButton ID="RadButton7" runat="server" Text="پەشیمان بوونەوە" CausesValidation="False" CommandName="Cancel" Skin="Office2007">
                                    <Icon PrimaryIconCssClass="rbCancel" PrimaryIconLeft="4" PrimaryIconTop="4" />
                                </telerik:RadButton>

                                <asp:ValidationSummary ID="ValidationSummary1" runat="server"
                                    ShowMessageBox="True" ShowSummary="False" ValidationGroup="VG1" />
                            </td>
                        </tr>
                    </table>

                </InsertItemTemplate>
            </asp:FormView>

C#

  protected void Upload(object sender, EventArgs e)
    {
        string watermarkText = "© test.com";
        
        //Get the file name.
        string fileName = Path.GetFileNameWithoutExtension(FileUpload1.PostedFile.FileName) + ".png";

        //Read the File into a Bitmap.
        using (Bitmap bmp = new Bitmap(FileUpload1.PostedFile.InputStream, false))
        {
            using (Graphics grp = Graphics.FromImage(bmp))
            {
                //Set the Color of the Watermark text.
                Brush brush = new SolidBrush(Color.Red);

                //Set the Font and its size.
                Font font = new System.Drawing.Font("Arial", 30, FontStyle.Bold, GraphicsUnit.Pixel);

                //Determine the size of the Watermark text.
                SizeF textSize = new SizeF();
                textSize = grp.MeasureString(watermarkText, font);

                //Position the text and draw it on the image.
                Point position = new Point((bmp.Width - ((int)textSize.Width + 10)), (bmp.Height - ((int)textSize.Height + 10)));
                grp.DrawString(watermarkText, font, brush, position);

                using (MemoryStream memoryStream = new MemoryStream())
                {
                    //Save the Watermarked image to the MemoryStream.
                    bmp.Save(memoryStream, ImageFormat.Png);
                    memoryStream.Position = 0;

                    //Start file download.
                    Response.Clear();
                    Response.ContentType = "image/png";
                    Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);

                    //Write the MemoryStream to the Response.
                    memoryStream.WriteTo(Response.OutputStream);
                    Response.Flush();
                    Response.Close();
                    Response.End();
                }
            }
        }
    }