一个按钮点击一个用户控件如何在包含的窗口中执行一个方法?

可以在窗口中创建命令,并将按钮的命令属性设置为此命令的名称。单击该按钮将触发该命令,而不需要引用父窗口。

This tutorial explains everything very clearly.

我最终不得不在VB中做的事情:

为自定义命令创建新的公共类,因为不希望将主窗口类设置为公共:

Public Class Commands
  Public Shared myCmd As New RoutedCommand
End Class

创建运行所需代码的Execute和CanExecute方法。这两种方法是在主窗口代码隐藏中创建的:

Class MainWindow

Private Sub myCmdCanExecute(ByVal sender As Object, ByVal e As CanExecuteRoutedEventArgs)
  e.CanExecute = True
  e.Handled = True
End Sub

Private Sub myCmdExecuted(ByVal sender As Object, ByVal e As ExecutedRoutedEventArgs)
  //Do stuff here...
  e.Handled = True
End Sub

End Class

在主窗口代码隐藏中创建命令绑定,并将两个处理程序方法添加到绑定中(这是C和VB之间完全不同的部分):

Class MainWindow
 Public Sub New()
      // This call is required by the designer.
      InitializeComponent()
      //Add any initialization after the InitializeComponent() call.
      //Create command bindings.
      Dim cb As New CommandBinding(Commands.myCmd)
      AddHandler cb.CanExecute, AddressOf myCmdCanExecute
      AddHandler cb.Executed, AddressOf myCmdExecuted
      Me.CommandBindings.Add(cb)
 End Sub
End Class

将新的自定义命令添加到用户控件上的按钮对象。使用自定义命令,这在XAML中似乎是不可能的,所以我必须在代码后面执行。Commands类需要是公共的,以便可以在此用户控件中访问这些命令:

Public Class myUserControl
  Public Sub New()
    //This call is required by the designer.
    InitializeComponent()
    // Add any initialization after the InitializeComponent() call.
    myButton.Command = Commands.myCmd
  End Sub
End Class

我建议你了解 Routed Events 和 Routed Commands -这是他们注定要做的事。

以上都很好。。。但我觉得有点复杂。。。

我的类似问题: 我有一个窗口(MainWindow.xaml)中有一个UserControl(SurveyHeader.xaml),在这个窗口中,UserControl是另一个UserControl(GetSurveyByID.xaml)。我在MainWindow.xaml中有一个私有void,当在GetSurveyByID.xaml中单击按钮(btnGetSurvey)时,我想运行它。

这条单行线的解决方案对我很有效。

this.ucSurveyHeader.ucGetSurveyByID.btnGetSurvey.Click += new RoutedEventHandler(btnGetSurvey_Click);

每个控件都有一个父属性,该属性告诉您谁实际“拥有”此控件。您可以在类型转换的同时使用它来访问myWindow的myMethod。
你也可以使用 发件人 事件处理程序的参数如下:

(sender as MyWindow).myMethod()

尝试以下静态帮助程序方法:

    public static T GetParentOfType<T>(DependencyObject currentObject)
        where T : DependencyObject
    {
        // Get the parent of the object in question
        DependencyObject parentObject = GetParentObject(currentObject);

        if (parentObject == null) 
            return null;

        // if the parent is the type then return
        T parent = parentObject as T;
        if (parent != null)
        {
            return parent;
        }
        else // if not the type, recursively continue up
        {
            return GetParentOfType<T>(parentObject);
        }
    }
    public static DependencyObject GetParent(DependencyObject currentObject)
    {
        if (currentObject == null)
            return null;
        // Convert the object in question to a content element
        ContentElement contentEl = currentObject as ContentElement;

        if (contentEl != null)
        {
            // try dependencyobject
            DependencyObject parent = System.Windows.ContentOperations.GetParent(contentEl);
            if (parent != null) 
                return parent;

            // Convert the contentEl to a FrameworkContentElement
            FrameworkContentElement frameworkEl = contentEl as FrameworkContentElement;
            // try frameworkcontentelement
            if (frameworkEl != null)
                return frameworkEl.Parent;
            else
                return null;
        }

        // couldn't get the content element, so return the parent of the visual element
        return System.Windows.Media.VisualTreeHelper.GetParent(currentObject);
    }

像这样执行:

StaticHelpers.GetParentOfType<Window>(this);