0
我有一個列表框,顯示一個項目和一個旁邊的刪除按鈕。我如何觸發中繼命令傳遞一個參數到viewmodel,所以我可以執行刪除操作。silverlight:如何通過單擊項目旁邊的按鈕來傳遞列表框中項目的值
示例代碼。
<ListBox ItemsSource="{Binding Path=CurrentUserRoles, Mode=TwoWay}" SelectedValuePath="Id" Name="lstRoles" Grid.Row="0" >
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" VerticalAlignment="Center">
<Button Command="{Binding Path=RemoveFromUserRolesCommand, Mode=TwoWay}" Content="Delete">
</Button>
<TextBlock Text=" "></TextBlock>
<TextBlock Text="{Binding Path=Name}"></TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
視圖模型:
private RelayCommand _removeFromUserRolesCommand = null;
public RelayCommand RemoveFromUserRolesCommand
{
get
{
if (_removeFromUserRolesCommand == null)
{
_removeFromUserRolesCommand = new RelayCommand(
() => this.OnARemoveFromUserRolesCommand(),
() => (this._adminModel != null));
}
return _removeFromUserRolesCommand;
}
}
private void OnARemoveFromUserRolesCommand()
{
try
{
if (!_adminModel.IsBusy && SelectedAvailableRole != null)
{
...
}
}
catch (Exception ex)
{
...
}
}
但它不工作。我是Silverlight的新手,所以任何人都會遇到這種情況?你能分享嗎?