用RoutedEventArgs傳遞變量？

我有以下類，並且想要將文本變量作爲RoutedEventArgs傳遞。用RoutedEventArgs傳遞變量？

public class CloseableTabItem : TabItem 
    { 
    String text; 

    public CloseableTabItem() 
    { 
     //This style is defined in themes\generic.xaml 
     DefaultStyleKeyProperty.OverrideMetadata(typeof(CloseableTabItem), 
      new FrameworkPropertyMetadata(typeof(CloseableTabItem))); 
    } 

    public CloseableTabItem(String incomingText) 
    { 
     //This style is defined in themes\generic.xaml 
     DefaultStyleKeyProperty.OverrideMetadata(typeof(CloseableTabItem), 
      new FrameworkPropertyMetadata(typeof(CloseableTabItem))); 
     text = incomingText; 
    } 

    public static readonly RoutedEvent CloseTabEvent = 
     EventManager.RegisterRoutedEvent("CloseTab", RoutingStrategy.Bubble, 
      typeof(RoutedEventHandler), typeof(CloseableTabItem)); 

    public event RoutedEventHandler CloseTab 
    { 
     add { AddHandler(CloseTabEvent, value); } 
     remove { RemoveHandler(CloseTabEvent, value); } 
    } 

    public override void OnApplyTemplate() 
    { 
     base.OnApplyTemplate(); 

     Button closeButton = base.GetTemplateChild("PART_Close") as Button; 
     if (closeButton != null) 
     closeButton.Click += new System.Windows.RoutedEventHandler(closeButton_Click); 
    } 

    void closeButton_Click(object sender, System.Windows.RoutedEventArgs e) 
    { 
     this.RaiseEvent(new RoutedEventArgs(CloseTabEvent, this)); 
    } 
    }

這是由窗口1的代碼這是一個WPF應用程序

public partial class Window1 : Window 
    { 
    public static Window1 myWindow1; 

    public Window1() 
    { 
     myWindow1 = this; 
     InitializeComponent(); 
     this.AddHandler(CloseableTabItem.CloseTabEvent, new RoutedEventHandler(this.CloseTab)); 
    } 

    private void CloseTab(object source, RoutedEventArgs args) 
    { 
     TabItem tabItem = args.Source as TabItem; 
     if (tabItem != null) 
     { 
     TabControl tabControl = tabItem.Parent as TabControl; 
     if (tabControl != null) 
      tabControl.Items.Remove(tabItem); 
     } 
    } 

    private void btnAdd_Click(object sender, RoutedEventArgs e) 
    { 
     CloseableTabItem tabItem = new CloseableTabItem("THIS IS A TEST"); 
     MainTab.Items.Add(tabItem); 
    } 
    }

我希望能夠在CloseTab方法打印「字符串文本」的值主類。我如何使「String text」與RoutedEventArgs參數一起傳遞？

最好的問候！

編輯

我做了一些變更項目，這裏是代碼

ClosableTabItem.cs

namespace SampleTabControl 
{ 
    public class CloseableTabItem : TabItem 
    { 

    String text; 
    public delegate void TabsEventHandler(object sender, TabsEventArgs e); 

    public CloseableTabItem() 
    { 
     //This style is defined in themes\generic.xaml 
     DefaultStyleKeyProperty.OverrideMetadata(typeof(CloseableTabItem), 
      new FrameworkPropertyMetadata(typeof(CloseableTabItem))); 
    } 

    public CloseableTabItem(String incomingText) 
    { 
     //This style is defined in themes\generic.xaml 
     DefaultStyleKeyProperty.OverrideMetadata(typeof(CloseableTabItem), 
      new FrameworkPropertyMetadata(typeof(CloseableTabItem))); 
     this.text = incomingText; 
    } 

    public static readonly RoutedEvent CloseTabsEvent = EventManager.RegisterRoutedEvent("CloseTab", RoutingStrategy.Bubble, typeof(TabsEventHandler), typeof(CloseableTabItem));  

    public event TabsEventHandler CloseTab 
    { 
     add { AddHandler(CloseTabsEvent, value); } 
     remove { RemoveHandler(CloseTabsEvent, value); } 
    } 


    public override void OnApplyTemplate() 
    { 
     base.OnApplyTemplate(); 

     Button closeButton = base.GetTemplateChild("PART_Close") as Button; 
     if (closeButton != null) 
     closeButton.Click += new System.Windows.RoutedEventHandler(closeButton_Click); 
    } 

    void closeButton_Click(object sender, System.Windows.RoutedEventArgs e) 
    { 
     TabsEventArgs args = new TabsEventArgs(CloseTabsEvent, text); 
     RaiseEvent(args); 
    } 
    } 
}

TabsEventArgs.cs

public class TabsEventArgs : RoutedEventArgs 
{ 
    private readonly string text; 

    public string Text 
    { 
     get { return text; } 
    } 

    public TabsEventArgs(RoutedEvent routedEvent, string text) : base(routedEvent) 
    { 
     this.text = text; 
    } 
}

Window1.cs

public partial class Window1 : Window 
    { 
    public static Window1 myWindow1; 

    public Window1() 
    { 
     myWindow1 = this; 
     InitializeComponent(); 
     this.AddHandler(CloseableTabItem.CloseTabsEvent, new RoutedEventHandler(this.CloseTab)); 
    } 

    private void CloseTab(object source, RoutedEventArgs args) 
    {  
     TabItem tabItem = args.Source as TabItem; 
     if (tabItem != null) 
     { 
     TabControl tabControl = tabItem.Parent as TabControl; 
     if (tabControl != null) 
      tabControl.Items.Remove(tabItem); 
     } 
    } 

    private void btnAdd_Click(object sender, RoutedEventArgs e) 
    { 
     CloseableTabItem tabItem = new CloseableTabItem("THIS IS A TEST"); 
     MainTab.Items.Add(tabItem); 
    } 
    }

進行更改（當我打開多個選項卡時，應用程序崩潰）後，如何訪問Window1類中CloseTab方法中的「字符串文本」？

來源

2011-11-13 Arya

謝謝，我真的很感謝討論這個問題以及你所做的修改/補充。 – wonea

創建的RoutedEventArgs一個新的子類，一個屬性添加到它，你可以存儲要傳遞的變量，並創建void (object, YourNewEventArgs)類型的相應處理程序委託，隨後再爲其分配的處理器類型的事件（目前使用正常RoutedEventHandler，因此只提供正常的RoutedEventArgs）。

如果要提高事件，則需要創建新事件參數並將該變量傳遞給該變量的屬性。如何獲取處理程序中的值應該是不言自明的。

來源

2011-11-13 03:51:48

@Arya：你的'CloseTabs'方法在應該有'TabsEventArgs'時仍然使用通用的'RoutedEventArgs'，然後你可以通過'args.Text'獲取文本。我不知道它爲什麼會崩潰，如果你需要幫助，你會發布異常消息和堆棧跟蹤。 –

我需要類似的東西，並在@Arya和@ H.B的幫助下。我想出了這個：

我自RoutedEventArgs子

public class ChangePageEventArgs : RoutedEventArgs { 
    private readonly int _pageNumber; 

    public int PageNumber { 
     get { return _pageNumber; } 
    } 

    public ChangePageEventArgs(RoutedEvent routedEvent, int pageNumber) : base(routedEvent) { 
     this._pageNumber = pageNumber; 
    } 
}

我的孩子上課

private void defineButton_Click(object sender, RoutedEventArgs e) { 
    ChangePageItemList(2); 
} 

public static readonly RoutedEvent GoToItemPropertiesViewEvent = EventManager.RegisterRoutedEvent(
"GoToItemPropertiesView", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(NoObjectView)); 

// Provide CLR accessors for the event 
public event RoutedEventHandler GoToItemPropertiesView { 
    add { AddHandler(GoToItemPropertiesViewEvent, value); } 
    remove { RemoveHandler(GoToItemPropertiesViewEvent, value); } 
} 

public void ChangePageItemList(int _pageNumber) { 
    ChangePageEventArgs args = new ChangePageEventArgs(GoToItemPropertiesViewEvent, _pageNumber); 
    this.RaiseEvent(args); 
}

我的父類

private ItemListView createItemListView() { 
    _itemListView = new ItemListView(); 
    _itemListView.GoToItemPropertiesView += new RoutedEventHandler(ChangePage); 

    return _itemListView; 
} 

private void ChangePage(object sender, RoutedEventArgs e) { 
    ChangePageEventArgs args = (ChangePageEventArgs)e; 
    // Value of page number is 2 
    int _pageNumber = args.PageNumber; 
}

希望它可以幫助你@Arya

來源

2013-05-13 17:21:51

用RoutedEventArgs傳遞變量？

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