Silverlight Datagrid上UpdateSourceTrigger LostFocus的解决方法？

Question

我有一个Silverlight 2应用程序验证数据OnTabSelectionChanged.我立即开始希望UpdateSourceTrigger不仅允许LostFocus,因为如果单击选项卡而不选择控件,则在验证之前不会更新LINQ对象.

我通过将焦点设置为另一个控件然后返回OnTextChanged解决了TextBoxes的问题:

Private Sub OnTextChanged(ByVal sender As Object, ByVal e As TextChangedEventArgs)
    txtSetFocus.Focus()
    sender.Focus()
End Sub

现在我试图在DataGrid中完成同样的黑客攻击.我的DataGrid使用在运行时为CellTemplate和CellEditingTemplate生成的DataTemplates.我尝试将TextChanged ="OnTextChanged"写入DataTemplate中的TextBox,但不会触发它.

有人有主意吗？

Answer 1

您也可以使用应用于文本框的行为来执行此操作

// xmlns:int is System.Windows.Interactivity from System.Windows.Interactivity.DLL)
// xmlns:behavior is your namespace for the class below
<TextBox Text="{Binding Description,Mode=TwoWay,UpdateSourceTrigger=Explicit}">
    <int:Interaction.Behaviors>
       <behavior:TextBoxUpdatesTextBindingOnPropertyChanged />
    </int:Interaction.Behaviors>
</TextBox>


public class TextBoxUpdatesTextBindingOnPropertyChanged : Behavior<TextBox>
{
    protected override void OnAttached()
    {
        base.OnAttached();

        AssociatedObject.TextChanged += new TextChangedEventHandler(TextBox_TextChanged);
    }

    protected override void OnDetaching()
    {
        base.OnDetaching();

        AssociatedObject.TextChanged -= TextBox_TextChanged;
    }

    void TextBox_TextChanged(object sender, TextChangedEventArgs e)
    {
        var bindingExpression = AssociatedObject.GetBindingExpression(TextBox.TextProperty);
        bindingExpression.UpdateSource();
    }
}