Register the component libraries

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

Server Control

    <DNL:DbNetGrid 
        ID="DbNetGrid1" 
        runat="server" 
        ConnectionString="SamplesDatabase" 
        Update="true"
        Insert="true"
        FromPart="Products inner join Categories on Products.CategoryID = Categories.CategoryID" >
        <Columns>
            <DNL:GridColumn ColumnExpression="Products.ProductName" Edit="true" Required="true"/>
            <DNL:GridColumn ColumnExpression="Categories.CategoryName" />
            <DNL:GridColumn ColumnExpression="Products.ProductID" Display="false" Edit="false" PrimaryKey="true"/>
            <DNL:GridColumn ColumnExpression="Products.CategoryId" Display="false" Edit="true"  Required="true" Lookup="select categoryid, categoryname from categories"/>
        </Columns>
    </DNL:DbNetGrid>