Register the component libraries

<%@ Register TagPrefix="DNL" Assembly="DbNetLink.DbNetSuiteVS" Namespace="DbNetLink.DbNetSuiteVS" %>

Server Control

    FilterType
    <asp:DropDownList ID="FilterType" runat="server" AutoPostBack="True">
        <asp:ListItem Value="Simple" />
        <asp:ListItem Value="Composite" />
    </asp:DropDownList>
    <DNL:DbNetGrid 
        ID="DbNetGrid1" 
        runat="server" 
        ConnectionString="SamplesDatabase" 
        FromPart="Orders" >
        <Columns>
            <DNL:GridColumn ColumnExpression="CustomerID" Label="Customer" Lookup="select customerid, companyname from customers" Filter="true" />
            <DNL:GridColumn ColumnExpression="EmployeeID" Label="Employee" Lookup="select employeeid, lastname from employees" Filter="true" />
            <DNL:GridColumn ColumnExpression="OrderDate" Label="Order Date" Filter="true" EditFormat="g" />
            <DNL:GridColumn ColumnExpression="ShipVia" Label="Ship Via" Lookup="select shipperid, companyname from shippers" Filter="true" />
            <DNL:GridColumn ColumnExpression="ShipCountry" Label="Ship Country" Filter="true" />
        </Columns>
    </DNL:DbNetGrid>

Server-side script

///////////////////////////////////////////////////////////////
protected override void OnLoad(EventArgs e)
///////////////////////////////////////////////////////////////
{
	base.OnLoad(e);

    DbNetGrid1.FilterColumnMode = (DbNetGrid.FilterColumnModeValues)Enum.Parse(typeof(DbNetGrid.FilterColumnModeValues), FilterType.SelectedValue, true);
}