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POHow to make custom Dynamic Data field template combo box required
 

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  1. POHow to make custom Dynamic Data field template combo box required
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    <p>I have created a custom dynamic data field template to display a drop down list of states. The drop down appears no problem. But it is not displaying as 'Required'. Meaning if I leave it blank, I can still move on to the next page. Other fields on the page do validate correctly.</p> <p>HTML of the field template</p> <pre><code>&lt;%@ Control Language="VB" AutoEventWireup="false" CodeFile="State_Edit.ascx.vb" Inherits="State_EditField" %&gt; &lt;asp:ObjectDataSource ID="objectDataSourceState" runat="server" SelectMethod="GetAll" DataObjectTypeName="AsbestosEntities.lu_state" TypeName="AsbestosBusiness.StateController"&gt; &lt;/asp:ObjectDataSource&gt; &lt;asp:DropDownList ID="DropDownList1" runat="server" CssClass="ui-corner-all ui-widget input-text" AppendDataBoundItems="true" DataSourceID="objectDataSourceState" DataTextField="description" DataValueField="code"&gt; &lt;asp:ListItem Value="-1" Text=""&gt;&lt;/asp:ListItem&gt; &lt;/asp:DropDownList&gt; &lt;asp:RequiredFieldValidator runat="server" ID="RequiredFieldValidator1" CssClass="validator" ControlToValidate="DropDownList1" Display="Static" Enabled="false" InitialValue="-1" /&gt; &lt;asp:DynamicValidator runat="server" ID="DynamicValidator1" CssClass="validator" ControlToValidate="DropDownList1" Display="Static" /&gt; </code></pre> <p>Code Behind of the field template</p> <pre><code>Imports System.ComponentModel.DataAnnotations Imports System.Web.DynamicData Imports System.Web Class State_EditField Inherits FieldTemplateUserControl Public Overrides ReadOnly Property DataControl As Control Get Return DropDownList1 End Get End Property Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) If (DropDownList1.Items.Count = 0) Then If Mode = DataBoundControlMode.Insert OrElse Not Column.IsRequired Then DropDownList1.Items.Add(New ListItem("[Not Set]", "")) End If PopulateListControl(DropDownList1) End If SetUpValidator(RequiredFieldValidator1) SetUpValidator(DynamicValidator1) End Sub Protected Overrides Sub OnDataBinding(ByVal e As EventArgs) MyBase.OnDataBinding(e) Dim selectedValueString As String = GetSelectedValueString() Dim item As ListItem = DropDownList1.Items.FindByValue(selectedValueString) If item IsNot Nothing Then DropDownList1.SelectedValue = selectedValueString End If End Sub Protected Overrides Sub ExtractValues(ByVal dictionary As IOrderedDictionary) ' If it's an empty string, change it to null Dim value As String = DropDownList1.SelectedValue If String.IsNullOrEmpty(value) Then value = Nothing End If ExtractForeignKey(dictionary, value) End Sub End Class </code></pre> <p>The form view to display the field</p> <pre><code>&lt;asp:FormView ID="FacilityInfo" runat="server" AllowPaging="True" DefaultMode="Insert" DataKeyNames="facility_id"&gt; &lt;InsertItemTemplate&gt; &lt;p&gt; &lt;h2&gt; Enter the facility information:&lt;/h2&gt; &lt;/p&gt; &lt;p&gt; &lt;asp:Label ID="Label7" runat="server" Text="State" CssClass="detailheader"&gt;&lt;/asp:Label&gt;&lt;br /&gt; &lt;asp:DynamicControl ID="facility_state" runat="server" DataField="facility_state" HtmlEncode="true" Mode="Insert" CssClass="detailitem" /&gt; &lt;/p&gt; &lt;/InsertItemTemplate&gt; &lt;/asp:FormView&gt; </code></pre> <p>The model</p> <pre><code>Imports System.ComponentModel Imports System.ComponentModel.DataAnnotations &lt;MetadataType(GetType(facilityMetadata))&gt; _ Public Class facility &lt;Key()&gt; _ Public Property facility_id As Integer Public Property facility_state As String End Class Public Class facilityMetadata &lt;UIHint("LongText")&gt; _ &lt;DisplayName("Facility ID")&gt; _ &lt;Required(ErrorMessage:="Facility ID is required")&gt; _ Public Property facility_id As Integer &lt;UIHint("State")&gt; _ &lt;DisplayName("State")&gt; _ &lt;StringLength(2, ErrorMessage:="State cannot be more than 2 characters")&gt; _ &lt;Required(ErrorMessage:="Facility state is required")&gt; _ &lt;RegularExpression("^[a-zA-Z]+$", ErrorMessage:="State can only contain letters.")&gt; _ Public Property facility_state As String End Class </code></pre>
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