Get element inside a DataTemplate

I have a following XAML and I need to change visibility of imageRemoveButton at runtime from the code behind file. How do I access that button?

<ItemsControl x:Name="ImagesItemsControl">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <Border BorderBrush="#ffdddddd"
                    BorderThickness="0,0,0,1">
                <Grid Margin="0,2">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="15" />
                        <ColumnDefinition />
                        <ColumnDefinition Width="20" />
                    </Grid.ColumnDefinitions>

                    <Grid Grid.Column="1"
                          VerticalAlignment="Center">
                        <TextBlock Text="{Binding Name}"
                                      TextWrapping="Wrap" />
                    </Grid>
                    <Button Grid.Column="3"
                            Width="20"
                            Height="20"
                            Content="X"
                            Template="{StaticResource ButtonAddTab}"
                     开发者_开发问答       Style="{StaticResource ButtonWizard}"
                            Tag="{Binding}"
                            x:Name="imageRemoveButton"
                            Click="ImageRemoveButton_Click" />
                </Grid>
            </Border>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

Use the loaded event on the button to save a reference to the button in the cs file. Use this reference when needed to change the visibility.

You cannot reference-by-name elements in a template. There is no matching code-behind/designer property generated by templates.

You want to bind the visibility of a control in the template to a property of your data items. That means you will need to add a property to your data items. Can you provide more details of your data items? If the property is a bool value, use a VisibilityConvertor (dime a dozen on this site).

Think of templates as wanting to always pull settings from the bindings, rather than have settings stuffed into them from the outside.

Try using Source binding to a class that will manage the button's visibility state. Adding a property to all your data items would be painfull but could be required if the button's visibility needs to be set based on a property of your data item. As per standard MVVM patterns you can then control the button's visibility from C#. If you need a specific instance of the button you can add a Loaded event handler to it and cache it accordingly.