我怎样才能捕获tabitem_previewmousedown事件 [英] How can I catch tabitem_previewmousedown event

问题描述

您好！我尝试在我的WPF解决方案中捕获TabItem.PreviewMouseDown，但是当我单击选项卡项时，我将TabControl作为源。我可以在TabItem_PreviewMouseDown事件上给TabItem吗？



我尝试过：



此解决方案运行良好：

 <   tabcontrol     name   =  MyTabControl    tabitem.previewmousedown   =  TabItem_PreviewMouseDown >  
 <   tabitem     header   =  Tabitem 0 < span class =code-keyword>>  
 &l t;   tabitem     header   =  Tabitem 1 >  
 <   tabitem     header   =  Tabitem 2 >  
 <   tabitem     header   =  Tabitem 3 >  
 <   tabitem     heade r   =  Tabitem 4 >  
 <   tabitem     header   =  Tabitem 5 >  

在main.xaml.cs文件中：

  private   void  TabItem_PreviewMouseDown（ object  sender，MouseEventArgs e）
 {
  var  tabItem = e.Source  as  TabItem;  //   e.Source is TabItem  
} 

我需要设置带有绑定的TabItems：

 <   tabcontrol    名称  =  MyTabControl    itemssource   =  {Binding Path = Tabs}    tabitem.previewmousedown   =  TabItem_PreviewMouseDown >  

in .cs：

  public  ObservableCollection< TA bitem>标签{ get ;  set ; } 
 
  public  MainWindow（）
 {
 InitializeComponent（）; 
 Tabs =  new  ObservableCollection< tabitem>（）; 
  for （ int  i =  0 ; i <   5 ; i ++）
 {
 TabItem mti =  new  TabItem（）{Header = i.ToString（）}; 
 Tabs.Add（mti）; 
} 
 DataContext =  this ; 
} 
 
  private   void  TabItem_PreviewMouseDown（ object  sender，MouseEventArgs e）
 {
  var  tabItem = e.Source  as  TabItem;  //   e.Source是TabControl !!!  
} 

如何在TabItem_PreviewMouseDown事件上提供TabItem？

解决方案

嗯，你需要手动添加将TabItems添加到集合时的预览处理程序：

 mti.PreviewMouseDown + = MainWindow_PreviewMouseDown; 

当TabControl超出范围时，别忘了手动取消挂钩事件。



再一次，我无法让编译器接受

 TabItem.PreviewMouseDown =   eventHandler 

xaml中的
的TabControl

Hello! I try to catch TabItem.PreviewMouseDown in my WPF solution, but when I click on tab item I give TabControl as source. can I give TabItem on TabItem_PreviewMouseDown event?

What I have tried:

This solution working good:

<tabcontrol name="MyTabControl" tabitem.previewmousedown="TabItem_PreviewMouseDown">
   <tabitem header="Tabitem 0">
   <tabitem header="Tabitem 1">
   <tabitem header="Tabitem 2">
   <tabitem header="Tabitem 3">
   <tabitem header="Tabitem 4">
   <tabitem header="Tabitem 5">

In main.xaml.cs file:

private void TabItem_PreviewMouseDown(object sender, MouseEventArgs e)
{
    var tabItem = e.Source as TabItem; // e.Source is TabItem
}

I need to set TabItems with Binding:

<tabcontrol name="MyTabControl" itemssource="{Binding Path=Tabs}" tabitem.previewmousedown="TabItem_PreviewMouseDown">

in .cs:

public ObservableCollection<tabitem> Tabs { get; set; }
 
public MainWindow()
{
   InitializeComponent();
   Tabs = new ObservableCollection<tabitem>();
   for (int i = 0; i < 5; i++)
   {
     TabItem mti = new TabItem() { Header = i.ToString() };
     Tabs.Add(mti);
   }
   DataContext = this;
}
 
private void TabItem_PreviewMouseDown(object sender, MouseEventArgs e)
{
    var tabItem = e.Source as TabItem; // e.Source is TabControl!!!
}

How can I give TabItem on TabItem_PreviewMouseDown event?

解决方案

Well, you need to manually add the preview handler when you add the TabItems to the collection:

mti.PreviewMouseDown += MainWindow_PreviewMouseDown;

Don't forget to manually unhook those events when the TabControl goes out of scope.

Once again, I couldn't get the compiler to accept

TabItem.PreviewMouseDown="eventHandler"

in the xaml for the TabControl

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