绑定RelayCommand时,WFP DataGrid CurrentCellChanged中发生强制转换错误
本文关键字:错误 转换 CurrentCellChanged RelayCommand WFP DataGrid 绑定 | 更新日期: 2023-09-27 18:30:01
内部异常消息:无法将"System.Reflection.RuntimeEventInfo"类型的对象强制转换为"System.Refraction.MethodInfo"类型
<DataGrid CurrentCellChanged="{Binding CallCommand}" AutoGenerateColumns="False" ItemsSource="{Binding MobileList, UpdateSourceTrigger=PropertyChanged}" SelectionUnit="FullRow" IsReadOnly="True">
<DataGrid.InputBindings>
<KeyBinding Key="C" Modifiers="Ctrl" Command="{Binding Path=DataContext.CopyToClipBoardCommand}" CommandParameter="{Binding }" />
</DataGrid.InputBindings>
<DataGrid.Columns>
<!--Column 1-->
<DataGridTextColumn Binding="{Binding MobileName}" Header="Name" />
<!--Column 2-->
<DataGridTextColumn Binding="{Binding MobileOS}" Header="OS" />
</DataGrid.Columns>
</DataGrid>
我的RelayCommand源代码:
public RelayCommand<KeyboardEventArgs> CallCommand
{
get
{
return new RelayCommand<KeyboardEventArgs>((selectedItem) =>
{
});
}
}
请帮助我,如何使用MVVM方法将RelayCommand
绑定到DataGrid中的CurrentCellChanged
属性?
请将事件命令绑定到CurrentCellChanged
属性。
使用System.Windows.Interactivity.dll来使用交互,它用于将命令绑定到事件,因此,您的MVVM模式不会违反。
在Window/Usercontrol的顶部,您必须编写用于使用交互的命名空间,
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
在这里,我放了一些xaml代码。
<DataGrid AutoGenerateColumns="False"
ItemsSource="{Binding MobileList, UpdateSourceTrigger=PropertyChanged}"
SelectionUnit="FullRow" IsReadOnly="True" >
<DataGrid.InputBindings>
<KeyBinding Key="C" Modifiers="Ctrl" Command="{Binding Path=DataContext.CopyToClipBoardCommand}" CommandParameter="{Binding }" />
</DataGrid.InputBindings>
<i:Interaction.Triggers>
<i:EventTrigger EventName="CurrentCellChanged">
<i:InvokeCommandAction Command="{Binding Path=DataContext.CallCommand,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type Window}}}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
<DataGrid.Columns>
<!--Column 1-->
<DataGridTextColumn Binding="{Binding MobileName}" Header="Name" />
<!--Column 2-->
<DataGridTextColumn Binding="{Binding MobileOS}" Header="OS" />
</DataGrid.Columns>
</DataGrid>