CSharp Using Template When Editing With Detailsview Control. – ADO.Net Database

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
  "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Template Edit</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>    <asp:DetailsView
        id="dtlProducts"
        AutoGenerateRows="false"
        AutoGenerateEditButton="true"
        AllowPaging="true"
        DefaultMode="Edit"
        DataSourceID="srcProducts"
        DataKeyNames="Id"
        Runat="server">
        <fields>
    <asp:TemplateField HeaderText="Title:">
    <editItemTemplate>
    <asp:TextBox
        id="txtTitle"
        Text='<%# Bind("Title") %>'
        runat="server" />
    <asp:RequiredFieldValidator
        id="reqTitle"
        ControlToValidate="txtTitle"
        Text="(required)"
        Display="Dynamic"
        Runat="server" />
    </editItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Box Office Totals:">
    <editItemTemplate>
    <asp:TextBox
        id="txtTotals"
        Text='<%# Bind("Totals", "{0:f}") %>'
        runat="server" />
    <asp:RequiredFieldValidator
        id="reqTotals"
        ControlToValidate="txtTotals"
        Text="(required)"
        Display="Dynamic"
        Runat="server" />
    <asp:CompareValidator
        id="cmpTotals"
        ControlToValidate="txtTotals"
        Text="(invalid)"
        Display="Dynamic"
        Operator="DataTypeCheck"
        Type="currency"
        Runat="server" />
    </editItemTemplate>
    </asp:TemplateField>
    </fields>
</asp:DetailsView><asp:SqlDataSource
    id="srcProducts"
    ConnectionString="<%$ ConnectionStrings:Products %>"
    SelectCommand="SELECT Id,Title,Totals FROM Products"
    UpdateCommand="UPDATE Products SET Title=@Title, Totals=@Totals WHERE Id=@Id"
    Runat="server" />
    </div>
    </form>
</body>
</html>File: Web.config<configuration>
  <connectionStrings>
    <add name="Products"
         connectionString="Data Source=.\SQLEXPRESS;
         AttachDbFilename=|DataDirectory|MyDatabase.mdf;Integrated Security=True;User Instance=True" />
  </connectionStrings>
</configuration>

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