如何在wpf上的鼠標左鍵組合框中關注組合框？

Question

<ComboBox TextSearch.TextPath="MemberFullName" IsEditable="True" Height="23" VerticalAlignment="Center" Grid.Row="1" Grid.Column="1" Margin="5,0,0,0" ItemsSource="{Binding MemberCollection}" SelectedItem="{Binding SelectedSearchMember,Mode=TwoWay,ValidatesOnDataErrors=True}"> 
      <ComboBox.ItemTemplate> 
       <DataTemplate> 
        <TextBlock Text="{Binding MemberFullName}" VerticalAlignment="Center"/> 
       </DataTemplate> 
      </ComboBox.ItemTemplate> 
</ComboBox> 

在鼠標左鍵按下它變成可編輯的

Answer 1

如果使用MVVM模式，添加到您的視圖模型變量：

private bool _isEditableComboBox = false; 
     public bool IsEditableComboBox 
     { 
      get { return _isEditableComboBox; } 
      set { _isEditableComboBox = value; RaisePropertyChanged(() => IsEditableComboBox); } 
     } 

添加到您的項目彙編：System.Windows.Interactivity

添加到您的查看該組件的命名空間：

xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" 

您的組合框改成這樣：

<ComboBox TextSearch.TextPath="MemberFullName" IsEditable="{Binding IsEditableComboBox, UpdateSourceTrigger=PropertyChanged}" Height="23" VerticalAlignment="Center" Grid.Row="1" Grid.Column="1" Margin="5,0,0,0" ItemsSource="{Binding MemberCollection}" SelectedItem="{Binding SelectedSearchMember,Mode=TwoWay,ValidatesOnDataErrors=True}"> 
      <i:Interaction.Triggers> 
       <i:EventTrigger EventName="PreviewMouseDown"> 
        <i:InvokeCommandAction Command="{Binding TurnOnEditMode}" /> 
       </i:EventTrigger> 
      </i:Interaction.Triggers> 
      <ComboBox.ItemTemplate> 
       <DataTemplate> 
        <TextBlock Text="{Binding MemberFullName}" VerticalAlignment="Center"/> 
       </DataTemplate> 
      </ComboBox.ItemTemplate> 
     </ComboBox> 

而且你必須添加到您的視圖模型下面的命令：

public ICommand TurnOnEditMode { get; private set; } 
     private void OnTurnoOnEditMode() 
     { 
      IsEditableComboBox = true; 
     }