簡體   English   中英

如何通過上下文菜單中的復制命令復制選定的列表視圖項目

[英]How to copy selected listview item by copy command in the context menu

我有一個列表視圖,我想通過在上下文菜單中選擇復制命令來復制所選項目。 我可以使用copy命令創建上下文菜單,如下圖所示:

在此處輸入圖片說明

問題是當我選擇一個行項目並右鍵單擊它時,上下文菜單不會顯示,並且我無法選擇復制命令來復制所選項目。 當我右鍵單擊列表視圖中的空白區域時,將顯示上下文菜單。

在此處輸入圖片說明

這是代碼:

的.xaml

<ListView x: Name = "DebugLogLb" BorderBrush = "{x:Null}" SelectionMode = "Extended" MouseRightButtonDown = "DebugLogLb_MouseRightButtonDown">
  <ListViewItem x: Name = "DebugLogItem">
    <ListViewItem.ContextMenu>
      <ContextMenu x: Name = "CommandMenu">
        <MenuItem Header = "Clear log" Click = "CommandMenuItem_Click"/>
        <MenuItem Header = "Copy" Command = "Copy" CommandTarget = "{Binding ElementName=DebugLogItem}"/>       
      </ContextMenu>
    </ListViewItem.ContextMenu>
  </ListViewItem>
</ListView >

.xaml.cs:

 private void DebugLogLb_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
 {
   ContextMenu contextMenu = this.FindName("CommandMenu") as ContextMenu;
   contextMenu.PlacementTarget = sender as ListViewItem;
   contextMenu.IsOpen = true;
 }

 private void CommandMenuItem_Click(object sender, RoutedEventArgs e) 
 {
   MenuItem menuItem = (MenuItem) e.OriginalSource;

   switch (menuItem.Header.ToString())
   {
     case "Clear log":
       DebugLogLb.Items.Clear();
       break;
     default:
       break;
   }
 }

這樣的事情將使您可以將ContextMenu及其MenuItems一起使用:

       <ListView x:Name = "DebugLogLb" BorderBrush = "{x:Null}" SelectionMode = "Extended" ItemsSource="{Binding items}">
        <ListView.ItemTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding}">
                    <TextBlock.ContextMenu >
                        <ContextMenu x:Name = "CommandMenu">
                            <MenuItem Header = "Clear log" />
                            <MenuItem Header = "Copy" Command = "Copy" CommandTarget = "{Binding ElementName=DebugLogItem}"/>
                        </ContextMenu>
                    </TextBlock.ContextMenu>
                </TextBlock>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView >

因此,在ItemTemplate內部定義它,以便在選擇每個項目時能夠使用它。

items集合在后面的代碼中定義:

    public ObservableCollection<string> items { get; set; }
    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = this;
        items = new ObservableCollection<string>();
        items.Add("first item");
        items.Add("second item");
    }

只是為了舉例,沒有什么幻想。

還有一件事,如果您仍然希望在單擊空白時仍可用,請在ListView上也添加一個ContextMenu:

          <ListView.ContextMenu>
            <ContextMenu x:Name = "CommandMenu">
                <MenuItem Header = "Clear log" />
                <MenuItem Header = "Copy" Command = "Copy" CommandTarget = "{Binding ElementName=DebugLogItem}"/>
            </ContextMenu>
        </ListView.ContextMenu>

暫無
暫無

聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.

 
粵ICP備18138465號  © 2020-2024 STACKOOM.COM