Question

我有一个包含名称和两个复选框的列表视图（名称，男性（复选框），女性（复选框））。我想确保一次只从列表视图中选择一个复选框。

   <UserControl.Resources>
   <DataTemplate x:Key="datatemp">
        <StackPanel Orientation="Horizontal" Width="200" >
            <TextBlock Text="{Binding VmName}" Width="129" Visibility="Visible" />
            <CheckBox  Name="cb"  IsThreeState="False" Checked="off_chek_select"  IsChecked="{Binding IsCheck, Mode=TwoWay}"  Margin="6,0,18,6" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
            <CheckBox  Name="cb1" IsThreeState="False" Checked="ins_chek_select" IsChecked="{Binding IsCheck1, Mode=TwoWay}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"  />
        </StackPanel>
    </DataTemplate>
</UserControl.Resources>

在这里，我在listview中使用了 datatemplate 。我无法从datatemplate访问控件以便在check事件上写入。

Answer 1

进入Tag属性，您可以引用父元素（在您的情况下是StackPanel），在代码隐藏中，您可以使用FindName方法找到元素。

XAML：

<DataTemplate x:Key="datatemp">
    <StackPanel x:Name="stackPanel" Orientation="Horizontal" Width="200" >
        <TextBlock Text="{Binding VmName}" Width="129" Visibility="Visible" />
        <CheckBox  Name="cb" Tag="{Binding ElementName=stackPanel}"  IsThreeState="False" Checked="off_chek_select"  IsChecked="{Binding IsCheck, Mode=TwoWay}"  Margin="6,0,18,6" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
        <CheckBox  Name="cb1" Tag="{Binding ElementName=stackPanel}" IsThreeState="False" Checked="ins_chek_select" IsChecked="{Binding IsCheck1, Mode=TwoWay}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"  />
    </StackPanel>
</DataTemplate>

代码隐藏：

private void off_chek_select(object sender, RoutedEventArgs e)
{
    var cbSender = sender as CheckBox;
    if (cbSender != null)
    {
        var stackPanel = cbSender.Tag as StackPanel;
        if (stackPanel != null)
        {
            var cb1 = stackPanel.FindName("cb1") as CheckBox;
            if (cb1 != null)
            {
                cb1.IsChecked = !cbSender.IsChecked;
            }
        }
    }
}

private void ins_chek_select(object sender, RoutedEventArgs e)
{
    var cbSender = sender as CheckBox;
    if (cbSender != null)
    {
        var stackPanel = cbSender.Tag as StackPanel;
        if (stackPanel != null)
        {
            var cb = stackPanel.FindName("cb") as CheckBox;
            if (cb != null)
            {
                cb.IsChecked = !cbSender.IsChecked;
            }
        }
    }
}

如果您有多个选择，并且在您可以使用RadioButton（msdn）时只应选择一个。

<UserControl.Resources>
    <DataTemplate x:Key="datatemp">
        <StackPanel Orientation="Horizontal" Width="200" >
            <TextBlock Text="{Binding VmName}" Width="129" Visibility="Visible" />
            <RadioButton  Name="cb"  IsThreeState="False" IsChecked="{Binding IsCheck, Mode=TwoWay}"  Margin="6,0,18,6" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
            <RadioButton  Name="cb1" IsThreeState="False" IsChecked="{Binding IsCheck1, Mode=TwoWay}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"  />
        </StackPanel>
    </DataTemplate>
</UserControl.Resources>

处理wpf复选框上的检查事件

1 个答案: