WPF ListBox Multiple Item Templates

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Hi,

I have a query that so far I haven't been able to find a solution too.

I have several datatemplates that are to be applied to a ListBox as follows:

XML

<DataTemplate x:Key="ValidationTemplate" DataType="{x:Type meta:CustomerValidationResult}">
                <views:ResultViewCustomerValidation />
            </DataTemplate>

            <DataTemplate x:Key="FileLoadTemplate" DataType="{x:Type meta:FileLoadResult}">
                <views:ResultViewFileLoad />
            </DataTemplate>

            <DataTemplate x:Key="ImportTemplate" DataType="{x:Type meta:CustomerImportResult}">
                <views:ResultViewCustomerImport />
            </DataTemplate>

Each of these is defined in the UserControl.Resources section of a user control and a DataTemplateSelector is applied to a Listbox to choose which to use.

This all works perfectly. However, I would like to introduce a second ValidationTemplate which is a "ResultViewCustomerValidationDetailed" and would like this to be enabled when an item of type "CustomerValidationResult" is selected.

I have read up on these links:
Change WPF DataTemplate for ListBox item if selected[^]
Focus and Selection Styling listbox items with multiple possible templates[^]
A Guided Tour of WPF – Part 4 (Data templates and triggers)[^]
http://blogs.msdn.com/b/wpfsdk/archive/2006/11/07/resource-style-datatemplate-controltemplate.aspx[^]

Thinking that they might point me in the right direction, and if I wasn't using a Template Selector they would work. However I cannot seem to grasp how to do a similar approach when using the Template Selector.

Any ideas?

Posted 28-May-13 1:47am

Pheonyx

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koleraba · Answer 1 · 2013-06-01T03:10:00

Try defining your ValidationTemplate as follows:

XML

<DataTemplate x:Key="ValidationTemplate" DataType="{x:Type meta:CustomerValidationResult}">
            <ContentControl Content="{Binding Path=.}">
                <ContentControl.Style>
                    <Style TargetType="{x:Type ContentControl}">
                        <Setter Property="ContentTemplate">
                            <Setter.Value>
                                <DataTemplate DataType="{x:Type meta:CustomerValidationResult}">
                                    <views:ResultViewCustomerValidation />
                                </DataTemplate>
                            </Setter.Value>
                        </Setter>
                        <Style.Triggers>
                            <DataTrigger Binding="{Binding Path=IsSelected}" Value="True">
                                <Setter Property="ContentTemplate">
                                    <Setter.Value>
                                        <DataTemplate DataType="{x:Type meta:CustomerValidationResult}">
                                            <views:ResultViewCustomerValidationDetailed />
                                        </DataTemplate>
                                    </Setter.Value>
                                </Setter>
                            </DataTrigger>
                        </Style.Triggers>
                    </Style>
                </ContentControl.Style>
            </ContentControl>
        </DataTemplate>

Pay attention to DataTrigger defined in the style of the ContentControl. This trigger binds to the IsSelected property of your view-model. When the value of that property will be true, the detailed template will be applied.

Hope that helps.
Uros