我正在分析使用Catel作为MVVM框架的WPF应用程序,并且我已经看到在ViewModel中我有2个保留路径
现在我在附加到上下文菜单的行为中创建了这样的RadMenuItem,它们被定义为
protected virtual IEnumerable<RadMenuItem> GetRowMenuItems(RadContextMenu contextMenu)
{
var rowItems = new List<RadMenuItem>();
RadMenuItem saveSettings = new RadMenuItem
{
Tag = "force",
Header = CoreResources.LBL_SAVE_SETTINGS,
Command = DefaultRtViewContextMenuCommands.SaveLayoutDataCommand,
CommandParameter = AssociatedObject,
Icon = new Image { Source = new BitmapImage(new Uri("pack://application:,,,/IF.Tesoreria.Client.WPF.Core;component/Media/save.png")) }
};
rowItems.Add(saveSettings);
RadMenuItem loadSettings = new RadMenuItem
{
Tag = "force",
Header = CoreResources.LBL_LOAD_SETTINGS,
Command = DefaultRtViewContextMenuCommands.LoadLayoutDataCommand,
CommandParameter = AssociatedObject,
Icon = new Image { Source = new BitmapImage(new Uri("pack://application:,,,/IF.Tesoreria.Client.WPF.Core;component/Media/load.png")) }
};
现在命令在
中定义 public class DefaultRtViewContextMenuCommands
{
public static Command<FlexGridCommandParameter> SaveLayoutDataCommand { get; private set; }
public static Command<FlexGridCommandParameter> LoadLayoutDataCommand { get; private set; }
private static void OnLoadLayoutCommandExecute(FlexGridCommandParameter grid)
{
Argument.IsNotNull(() => grid);
var dependencyResolver = DependencyResolverManager.Default;
var openFileService = dependencyResolver.DefaultDependencyResolver.Resolve<IOpenFileService>();
openFileService.Filter = "Gridview setting file|*.flexgrid";
if (openFileService.DetermineFile())
{
// User selected a file
using (var fs = File.OpenRead(openFileService.FileName))
{
GridViewPersistenceHelper.LoadLayout(grid.Grid, fs, null);
}
}
}
private static void OnSaveLayoutCommandExecute(FlexGridCommandParameter grid)
{
Argument.IsNotNull(() => grid);
var dependencyResolver = DependencyResolverManager.Default;
var saveFileService = dependencyResolver.DefaultDependencyResolver.Resolve<ISaveFileService>();
saveFileService.Filter = "Gridview setting file|*.flexgrid";
if (saveFileService.DetermineFile())
{
// User selected a file
using (var fs = File.OpenWrite(saveFileService.FileName))
{
GridViewPersistenceHelper.SaveLayout(grid.Grid, fs);
}
}
}
static DefaultRtViewContextMenuCommands()
{
viewModelFactory = ServiceLocator.Default.ResolveType<IViewModelFactory>();
portfolioService = ServiceLocator.Default.ResolveType<IPortfoliosService>();
pkInstrumentsService = ServiceLocator.Default.ResolveType<IPkInstrumentsService>();
SaveLayoutDataCommand = new Command<FlexGridCommandParameter>(OnSaveLayoutCommandExecute,_=>true);
LoadLayoutDataCommand = new Command<FlexGridCommandParameter>(OnLoadLayoutCommandExecute,_=>true);
}
我做错了什么? 感谢
答案 0 :(得分:1)
radMenuItem.Command = null;
适合我。您可以反编译并在执行此操作时看到该菜单项从Command的CanExecuteChanged
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