MvvmLight EventToCommand和WPFToolkit DataGrid中双击
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18-09-2019 - |
题
试图找出如何使用EventToCommand设置的行DataGrid中双击处理程序。该命令居住在视图模型的每一行。刚刚的是的离谱了我的经验,因为我没有使用过的互动呢。
感谢。
我会用mvvmlight标签,但我没有足够高的声望还没有做出新的标签。
解决方案
这将是解决方案,如果命令住在“GridVieModel”,而不是对“RowViewModel”。
<Window...
...xmlns:dg="clr-namespace:Microsoft.Windows.Controls;assembly=WPFToolkit"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:GalaSoft_MvvmLight_Command="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras">
<dg:DataGrid x:Name="dg">
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseDoubleClick">
<GalaSoft_MvvmLight_Command:EventToCommand CommandParameter="{Binding SelectedItem, ElementName=dg}" Command="{Binding Path=SelectCommand, Mode=OneWay}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</dg:DataGrid>
</Window>
您可以创建一个rowview自排也有自己的视图模型,并在rowview使用行(容器)的子元素的MouseDoubleClick事件。
或者您为您的命令绑定一个转换器:
<GalaSoft_MvvmLight_Command:EventToCommand Command="{Binding SelectedItem, ElementName=dg, Mode=OneWay, Converter=...}"/>
转换器然后将检查是否将selectedItem是所需类型的返回指令(喜欢的东西ISelectCommandable与RelayCommand属性)
其他提示
在任何情况下,来寻找在这里和我想知道如何落得这样做是W / O EventToCommand
public class DataGridAttachedBehaviors
{
#region DoubleClick
public static DependencyProperty OnDoubleClickProperty = DependencyProperty.RegisterAttached(
"OnDoubleClick",
typeof(ICommand),
typeof(DataGridAttachedBehaviors),
new UIPropertyMetadata(DataGridAttachedBehaviors.OnDoubleClick));
public static void SetOnDoubleClick(DependencyObject target, ICommand value)
{
target.SetValue(DataGridAttachedBehaviors.OnDoubleClickProperty, value);
}
private static void OnDoubleClick(DependencyObject target, DependencyPropertyChangedEventArgs e)
{
var element = target as Control;
if (element == null)
{
throw new InvalidOperationException("This behavior can be attached to a Control item only.");
}
if ((e.NewValue != null) && (e.OldValue == null))
{
element.MouseDoubleClick += MouseDoubleClick;
}
else if ((e.NewValue == null) && (e.OldValue != null))
{
element.MouseDoubleClick -= MouseDoubleClick;
}
}
private static void MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
UIElement element = (UIElement)sender;
ICommand command = (ICommand)element.GetValue(DataGridAttachedBehaviors.OnDoubleClickProperty);
command.Execute(null);
}
#endregion DoubleClick
#region SelectionChanged
//removed
#endregion
}
在我的XAML:
<dg:DataGrid.RowStyle>
<Style BasedOn="{StaticResource DataGridDemoRowStyle}"
TargetType="{x:Type dg:DataGridRow}">
<Setter Property="skins:DataGridAttachedBehaviors.OnDoubleClick"
Value="{Binding Recall}" />
</Style>
</dg:DataGrid.RowStyle>
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