DataTemplateSelector Support

The DataTemplateSelector approach enables conditional selection of DataTemplates, based on information provided by the respective bound data item.

Read more about DataTemplateSelectors in the Template Selectors article.

DataTemplateSelectors in RadPropertyGrid

RadPropertyGrid enables its users to implement conditional editor DataTemplate selection for its PropertyGridFields trough a DataTemplateSelector:

Example 1: Creating custom DataTemplateSelector

C#

	public class Customer
	{
	    public string FirstName { get; set; }
	    public string LastName { get; set; }
	    public string PhoneNumber { get; set; }
	    public Department Department { get; set; }
	}
	 
	public class FieldTemplateSelector : DataTemplateSelector
	{
	    public override DataTemplate SelectTemplate(object item, DependencyObject container)
	    {
	        PropertyDefinition propDef = item as PropertyDefinition;
	        if (propDef.DisplayName == "PhoneNumber")
	        {
	            return this.PhoneNumberDataTemplate;
	        }
	        if (propDef.SourceProperty.PropertyType == typeof(string))
	        {
	            return this.StringDataTemplate;
	        }
	        return null;
	    }
	 
	    public DataTemplate PhoneNumberDataTemplate { get; set; }
	    public DataTemplate StringDataTemplate { get; set; }
	}

VB.NET

	Public Class Customer
	    Public Property FirstName() As String
	    Public Property LastName() As String
	    Public Property PhoneNumber() As String
	    Public Property Department() As Department
	End Class
	Public Class FieldTemplateSelector
	    Inherits DataTemplateSelector
	    Public Overrides Function SelectTemplate(item As Object, container As DependencyObject) As DataTemplate
	        Dim propDef As PropertyDefinition = TryCast(item, PropertyDefinition)
	        If propDef.DisplayName = "PhoneNumber" Then
	            Return Me.PhoneNumberDataTemplate
	        End If
	        If propDef.SourceProperty.PropertyType = GetType(String) Then
	            Return Me.StringDataTemplate
	        End If
	        Return Nothing
	    End Function
	    Public Property PhoneNumberDataTemplate() As DataTemplate
	        Get
	            Return m_PhoneNumberDataTemplate
	        End Get
	        Set(value As DataTemplate)
	            m_PhoneNumberDataTemplate = value
	        End Set
	    End Property
	    Private m_PhoneNumberDataTemplate As DataTemplate
	    Public Property StringDataTemplate() As DataTemplate
	        Get
	            Return m_StringDataTemplate
	        End Get
	        Set(value As DataTemplate)
	            m_StringDataTemplate = value
	        End Set
	    End Property
	    Private m_StringDataTemplate As DataTemplate
	End Class

Example 2: Defining custom DataTemplateSelector

XAML

			<Grid>
			    <Grid.Resources>
			        <local:FieldTemplateSelector x:Key="DataTemplateSelector">
			            <local:FieldTemplateSelector.StringDataTemplate>
			                <DataTemplate>
			                    <TextBox Foreground="Red"
			         TextAlignment="Right"
			         telerik:AutoBindBehavior.UpdateBindingOnElementLoaded="Text" />
			                </DataTemplate>
			            </local:FieldTemplateSelector.StringDataTemplate>
			            <local:FieldTemplateSelector.PhoneNumberDataTemplate>
			                <DataTemplate>
			                    <telerik:RadMaskedTextInput Mask="###-###-###" Value="{Binding PhoneNumber, Mode=TwoWay}" />
			                </DataTemplate>
			            </local:FieldTemplateSelector.PhoneNumberDataTemplate>
			        </local:FieldTemplateSelector>
			    </Grid.Resources>
			    <telerik:RadPropertyGrid x:Name="rpg" EditorTemplateSelector="{StaticResource DataTemplateSelector}" />
			</Grid>

You might wonder where these "telerik" and "local", in front of the tags RadPropertyGrid and FieldTemplateSelector, came from. Well, these are the names of the namespaces you give when you import the appropriate assembly or your custom DataTemplateSelector class into the XAML file.

The AutoBind attached behavior is fully compatible with the DataTemplateSelector approach.

See Also

• AutoBind Behaviour