Problem to show Upload File text in a textbox.

<asp:TemplateField HeaderText="Upload File" HeaderStyle-HorizontalAlign="Center">

<Hari:Fileupload ID="FileUpload1"  runat="server" Width="180px" size="25" CssClass="button" />
<asp:ImageButton ID="ImgFileName" CausesValidation="False" ImageUrl="~/Images/arrow.png" Width="17px" runat="server" OnClick="x" />



<asp:TemplateField HeaderText="File Name" HeaderStyle-HorizontalAlign="Center">

<asp:TextBox ID="TxtFileName" Width="100px" runat="server" >

Public Sub x()
       Dim cmd As New SqlCommand With {.Connection = Hari.Utility.dbutility.Con}
       For Each row As GridViewRow In GridView1.Rows

           If CType(row.FindControl("FileUpload1"), FileUpload).HasFile Then
               Dim fileName As String = Path.GetFileName(CType(row.FindControl("FileUpload1"), FileUpload).PostedFile.FileName).ToString
               CType(row.FindControl("FileUpload1"), FileUpload).PostedFile.SaveAs((Server.MapPath("~/photos/doc/") + fileName))

               Dim doc As String() = Split(fileName, ".")
               Dim FName As String = doc(0)
               CType(row.FindControl("TxtFileName"), TextBox).Text = FName

               fpath = "~/photos/syllabus/" + fileName




           End If

       Next

   End Sub