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 
        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

        <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.

Rad Property Grid Template Selectors

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

See Also

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