I need disable a combobox whenever it contains only 1 item. I spent a fair amount of time reading the documentation on the microsoft website, but I cannot see any trigger for this type of events. Is this possible in a mvvm way?
I have several (~100) comboboxes that share the same style, so I was looking to add the trigger to the style but I cannot find a way to do this.
Any help is appreciated, even if it involves more documentation to read.
<DataGridTemplateColumn Header="D">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox Style="{StaticResource ComboboxStyleD}" HorizontalContentAlignment="Center" SelectedValue="{Binding D[0]}" ItemsSource="{Binding D}" IsSynchronizedWithCurrentItem="False">
</ComboBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
Found an "easy" solution for this in WPF.
<Style x:Key="ComboboxStyleD" TargetType="{x:Type ComboBox}">
<Setter Property="TextBlock.Foreground" Value="Red"/>
<Setter Property="TextBlock.Background" Value="Red"/>
<Style.Triggers>
<DataTrigger Binding="{Binding D.Count}" Value="1">
<Setter Property="IsEnabled" Value="False" />
<Setter Property="TextBlock.Foreground" Value="Black"/>
<Setter Property="TextBlock.Background" Value="Black"/>
</DataTrigger>
</Style.Triggers>
</Style>