Question

我为它创建了资源字典和代码隐藏文件。在XAML中，我定义了命令绑定并添加了Executed handler：

<Button Grid.Row="2" Width="100" >
  <CommandBinding Command="Search" Executed="CommandBinding_Executed" />
</Button>

以下是代码：

partial class StyleResources : ResourceDictionary {

        public StyleResources() {
            InitializeComponent();
        }
        private void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e) {
            //this is never executed
        }
    }

我不知道为什么在单击按钮时命令没有执行，而且，为什么在我没有将CanExecute设置为true时启用按钮。我也尝试将其设置为true，但CanExecute事件也没有触发。以下是我使用资源字典的方法：

public partial class MyWindow : Window {
        public MyWindow() {
            InitializeComponent();
            Uri uri = new Uri("/WPFLibs;component/Resources/StyleResources.xaml", UriKind.Relative);
            ResourceDictionary Dict = Application.LoadComponent(uri) as ResourceDictionary;
            this.Style = Dict["WindowTemplate"] as Style;
        }
    }

Answer 1

这不是将命令绑定到按钮的方式。看起来应该是这样的：

<Grid>
  <Grid.CommandBindings>
    <CommandBinding Command="Search" 
                    Executed="Search_Executed"
                    CanExecute="Search_CanExecute" />
  </Grid.CommandBindings>
  ...
  <Button Grid.Row="2" Width="100" Command="Search" />
  ...
</Grid>

在代码隐藏中：

private void Search_Executed(object sender, ExecutedRoutedEventArgs e) {
    // do something
}

private void Search_CanExecute(object sender, CanExecuteRoutedEventArgs e) {
    e.CanExecute = ...; // set to true or false
}

执行命令不会在后面的资源字典代码中触发

1 个答案: