Entity Templates - ASP.NET Dynamic Data - page 121

LISTING 4.4

Customer Entity Template (Code-Behind)

using System.Web.DynamicData;

namespace WebApplication.DynamicData.EntityTemplates
{

public partial class CustomerEntityTemplate : EntityTemplateUserControl
{
}

}

Having defined the entity template, you can modify the Customer Information page to
take advantage of it by replacing the entire contents of the FormView with a
DynamicEntity control, as shown in Listing 4.5.

LISTING 4.5 Customer Information Page with Entity Template (Markup)

<%@ Page Language=”C#”
MasterPageFile=”~/Site.master” CodeBehind=”SamplePage.aspx.cs”
Inherits=”WebApplication.Samples.Ch04.ReadOnlyTemplate.SamplePage” %>

<asp:Content runat=”server” ContentPlaceHolderID=”main”>
<asp:ValidationSummary runat=”server” />
<asp:FormView ID=”form” runat=”server” DataSourceID=”dataSource”>
<ItemTemplate>
<asp:DynamicEntity runat=”server” />
</ItemTemplate>
</asp:FormView>
<asp:EntityDataSource ID=”dataSource” runat=”server”
ConnectionString=”name=NorthwindEntities” AutoGenerateWhereClause=”true”
DefaultContainerName=”NorthwindEntities” EntitySetName=”Customers”>
<WhereParameters>
<asp:QueryStringParameter QueryStringField=”ID” Name=”CustomerID” />
</WhereParameters>
</asp:EntityDataSource>
</asp:Content>

DynamicEntity is a new control defined in the System.Web.DynamicData namespace.
At run time, it automatically determines the MetaTable associated with its parent
FormView control and locates a template with a matching name in the
DynamicData\EntityTemplates folder of the web application. If the matching entity
template exists, DynamicEntity loads and includes it the web page, which in this example
makes it look identical to the one shown in Figure 4.1.