Web (ASP.NET), VB.NET รบกวนเรื่องการแสดงข้อมูลใน GridView ทีคับไม่รู้ทำยังไงคับ

Protected Sub Btn_Add_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Btn_Add.Click
        If Trim(txt_A_memberID.Text) = "" Then
            lbl_A_memberID.Visible = True
            txt_A_memberID.Focus()
            Return
        End If
        Dim connStr As String = ConfigurationManager.ConnectionStrings("testConnectionString").ConnectionString.ToString()
        Dim conn As New SqlConnection(connStr)
        Dim cmd As New SqlCommand()
        cmd.CommandText = "INSERT INTO Table_บุคลากร(A_memberID,A_membernameL,A_Agency,A_memberTel,A_Date,A_FileName)" & _
            " VALUES(@A_memberID,@A_membernameL,@A_Agency,@A_memberTel,@A_Date,@A_FileName) "

        cmd.Parameters.Add("@A_memberID", SqlDbType.VarChar).Value = txt_A_memberID.Text
        cmd.Parameters.Add("@A_membernameL", SqlDbType.VarChar).Value = txt_A_membernameL.Text
        cmd.Parameters.Add("@A_Agency", SqlDbType.VarChar).Value = txt_A_memberAgency.Text
        cmd.Parameters.Add("@A_memberTel", SqlDbType.VarChar).Value = txt_A_memberTel.Text
        cmd.Parameters.Add("@A_Date", SqlDbType.DateTime).Value = DateTime.Now

        Response.Redirect("ข้อมูลบุคลากร.aspx")

        If Me.FileUpload1.HasFile Then
            Me.FileUpload1.SaveAs(Server.MapPath("Picture/" & FileUpload1.FileName))
            cmd.Parameters.Add("@A_FileName", SqlDbType.VarChar).Value = "Picture/" & FileUpload1.PostedFile.FileName
        End If
       


        cmd.Connection = conn
        conn.Open()
        cmd.ExecuteNonQuery()
        conn.Close()

        

        GetData()
    End Sub