DataTemplateSelector Support

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

Here is an article that provides some additional, more extensive information on DataTemplateSelectors.

DataTemplateSelectors in RadPropertyGrid

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

Example 1: Creating custom DataTemplateSelector

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; }
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
            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
            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

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

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.

Rad Property Grid Template Selectors

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

See Also

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