我有一个自定义控件,继承自Textbox,在.cs文件中,我有一个名为SelectedItems的DependencyProperty(如果有任何项目,这些项目将显示在文本框内),如果没有,则文本框看起来像普通的文本框。
在generic.xaml中,在Template中添加了新的边框,并在其内部放置了ItemsControl,其中包含如下的项模板
XAML中的ItemControl部分:
<Border BorderBrush="Green" BorderThickness="1">
<ItemsControl x:Name="PART_SelectedItemsHost"
ItemsSource="{TemplateBinding SelectedItems}"
ItemTemplate="{TemplateBinding SelectedItemsTemplate}"
VerticalAlignment="Stretch"
HorizontalAlignment="Stretch"
Margin="{TemplateBinding Padding}"
Visibility="Visible">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel IsItemsHost="True">
</WrapPanel>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</Border>
Xaml ItemTemplate 部分:
<DataTemplate x:Key="DefaultSelectedItemsTemplate" >
<Border x:Name="selectedItemBorder" BorderBrush="Gray" BorderThickness="1" CornerRadius="5" Background="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" Margin="5,1,1,1">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="15"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{Binding}" Margin="5,0,3,0"></TextBlock>
<Button BorderThickness="0" Grid.Column="1" Click="???" or Command="???" >X</Button>
</Grid>
</Border>
</DataTemplate>
现在我该如何在我的.cs文件中绑定"X"按钮?我试着重写OnApplyTemplate()方法...我成功地绑定了当我点击项目文本框时的mousedown事件,但我不知道如何将click事件附加到按钮上。
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
ItemsControl itmControl = GetTemplateChild("PART_SelectedItemsHost") as ItemsControl;
if (itmControl != null)
{
itmControl.MouseLeftButtonDown += new MouseButtonEventHandler(itmControl_MouseLeftButtonDown);
// blind click on X buttons in ItemsControl
}
}
private void itmControl_MouseLeftButtonDown(object obj, MouseButtonEventArgs e)
{
//IsMouseLeftButtonDown = true;
System.Diagnostics.Debug.WriteLine(e.OriginalSource.ToString());
object item = (e.OriginalSource as FrameworkElement).DataContext;
deleteSelectedItem(item);
}
这是控件的外观,需要点击 X 按钮从 SelectedItem 集合中删除该项。