如何将丢失的焦点绑定到ViewModel中的命令

Question

<ComboBox x:Name="PrimaryCountyFIPS" Grid.Row="3" Grid.Column="3" Margin="3"
                        IsSynchronizedWithCurrentItem="False"
                        IsEditable="True"
                        LostFocus="{Binding LostFocusCommand }"
                        ItemContainerStyle ="{StaticResource ComboBoxItemStyle}"
                        IsEnabled="{Binding IsChecked, ElementName=IncludePrimZipCodeCheckBox}"
                        ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type viewmodel:GeocoderDataCleanerViewModel}, AncestorLevel=1}, Path=DestinationColsDictionary}" DisplayMemberPath="Value" SelectedItem="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type viewmodel:GeocoderDataCleanerViewModel}, AncestorLevel=1}, Path=PrimaryCountyFIPSField, Mode=OneWay}">
        </ComboBox>

  

我有一个ComboBox，我想将其丢失的焦点事件绑定到ViewModel中的命令。当我尝试绑定它时，出现一个错误，提示“ LostFocus不是一种方法”，我该如何将其绑定到该Command，甚至有可能？

Answer 1

我想这就是您要寻找的东西

    <ComboBox>
        <i:Interaction.Triggers>
            <i:EventTrigger EventName="LostFocus">
                <i:InvokeCommandAction Command="{Binding Path=DoSomethingCommand}"/>
            </i:EventTrigger>
        </i:Interaction.Triggers>
    </ComboBox>