Changing value dynamically with template problem

[Christie Admin]

Hi,

 

in my XAML I use the following TemplateSelector to have a button beside my "SourceFile" property to open a FileDialog to select a filename:

            <local:PropertyGridTemplateSelector x:Key="dataTemplateSelector">
                <local:PropertyGridTemplateSelector.SourceFilePropertyTemplate>
                    <DataTemplate>
                        <Grid Margin="0,0,2,0">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition/>
                                <ColumnDefinition Width="Auto"/>
                            </Grid.ColumnDefinitions>
                            <TextBox Text="{Binding SourceFile}" Grid.Column="0"/>
                            <Button Content="..." Width="25" Height="25" Grid.Column="1" Click="SelectFileClick"/>
                        </Grid>
                    </DataTemplate>
                </local:PropertyGridTemplateSelector.SourceFilePropertyTemplate>
                <!-- More templates here -->
            </local:PropertyGridTemplateSelector>

 

    public class PropertyGridTemplateSelector : DataTemplateSelector 
    {
        public override DataTemplate SelectTemplate(object item, DependencyObject container)
        {
            PropertyDefinition dpi = item as PropertyDefinition;
            
            if (dpi.DisplayName == "SourceFile")
            {
                return SourceFilePropertyTemplate;
            }

            return null;
        }

        public DataTemplate SourceFilePropertyTemplate { get; set; }
    }

 

when I select a file through my file dialog,I want to update the recontrol to reflect the selection I made in my file dialog...

 

Thank's

Alain

[Dilyan Traykov]

Hello Alain,

I've attached a sample project to show you how to achieve the desired behavior.

What I've done is created an Avatar class with a single SourceFile property, which implements the INotifyPropertyChanged. Then I set the SourceFile property of the item to the SafeFileName of the selected file, which triggers the OnPropertyChanged event, which in turn updates the value of the textbox.

Let me know whether this works for you. Feel free to approach me with any further questions you might have.

Regards,
Dilyan Traykov
Telerik