BINDING DATA IN A LITERAL CONTROL PRESENT INSIDE THE ITEM TEMPLATE OF GRIDVIEW

<asp:TemplateField Visible="false">
 <ItemTemplate>
  <asp:Literal runat="server" ID="ltlFileNameUrl" Text='<%#Eval("FileNameUrl") %>'></asp:Literal>
   </ItemTemplate>
   </asp:TemplateField>

DropDownList Fill

<tr>
                        <td colspan="2" style="height: 32px" align="left">
                            Select Branch&nbsp;
                            <asp:DropDownList ID="ddlBranches" runat="server" AppendDataBoundItems="True"
                                AutoPostBack="True" CausesValidation="True">
                                <asp:ListItem Value="-1">---Select---</asp:ListItem>
                            </asp:DropDownList>
                            <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"
                                ControlToValidate="ddlBranches" CssClass="red_text" Display="Dynamic"
                                ErrorMessage="Please enter Branches" InitialValue="-1" SetFocusOnError="True"
                                ValidationGroup="Eventsp"></asp:RequiredFieldValidator>
                        </td>
                    </tr>



 string str = "select id,branchname from branches";
                DataTable dt = new DataTable();
                dt = db_function.getDataTable(str);

                ddlBranches.DataSource = dt;
                ddlBranches.DataTextField = "branchname";
                ddlBranches.DataValueField = "id";

                ddlBranches.DataBind();

public static DataTable getDataTable(string SQL)
    {
        if (sqlcon == null || sqlcon.State == ConnectionState.Closed)
        {
            db_function.opensqlconnection();
        }
        DataTable dt = new DataTable("ABC");
        using (sqlcom = sqlcon.CreateCommand())
        {
            sqlcom.CommandType = CommandType.Text;
            sqlcom.CommandText = SQL;
            sqlcom.CommandTimeout = 0;
            using (IDataReader reader = sqlcom.ExecuteReader())
            {  dt.Load(reader);
                if (reader != null) reader.Close();
            }
        }
        return dt;
    }

public static DbConnection sqlcon;
    public static IDbCommand sqlcom;