C# 如何将UserControl事件用于MainWindow

我正在使用MVVM模式创建一个WPF应用程序

在我的应用程序中，我有一个像应用程序的主模板一样工作的主窗口。我在

UserControl

中创建了一个类似于菜单的

TreeView

在主窗口中，所有演示文稿都位于选项卡控件中，因此my

TreeView

中的每个项目实际上都是一个新选项卡

选项卡控件在主窗口上定义

因此，我的问题是，当

TreeView

的事件处理程序位于

UserControls

代码隐藏文件而不在主窗口文件中，因此我无法与它交互时，如何在当前选项卡控件中打开新选项卡（按

TreeView

中的项目）

---

是否可以在主窗口的代码隐藏文件中托管

TreeView

的事件处理程序？

您应该可以这样做

Usercontrol.xaml

<TreeView SelectedItemChanged="TreeViewHandler" />

<local:myUsercontrol TreeViewSelectedItemChanged="myHandler" />

Usercontrol.cs

public delegate void TreeViewSelectedItemHandler(object sender, RoutedPropertyChangedEventArgs<object> e);
public event TreeViewSelectedItemHandler TreeViewSelectedItemChanged;

private void TreeViewHandler(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    //Capture event from usercontrol and execute defined event
    if (TreeViewSelectedItemChanged != null)
    {
        TreeViewSelectedItemChanged(sender, e);
    }
}

private void myHandler(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    //Do stuff
}

public委托void TreeViewSelectedItemHandler（对象发送方，RoutedPropertyChangedEventArgs e）；
公共事件TreeViewSelectedItemHandler TreeViewSelectedItemChanged；
私有void TreeViewHandler（对象发送方，RoutedPropertyChangedEventArgs e）
{
//从usercontrol捕获事件并执行定义的事件
if（TreeViewSelectedItemChanged！=null）
{
TreeViewSelectedItemChanged（发送方，e）；
}
}

Window.xaml

<TreeView SelectedItemChanged="TreeViewHandler" />

<local:myUsercontrol TreeViewSelectedItemChanged="myHandler" />

Window.cs

public delegate void TreeViewSelectedItemHandler(object sender, RoutedPropertyChangedEventArgs<object> e);
public event TreeViewSelectedItemHandler TreeViewSelectedItemChanged;

private void TreeViewHandler(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    //Capture event from usercontrol and execute defined event
    if (TreeViewSelectedItemChanged != null)
    {
        TreeViewSelectedItemChanged(sender, e);
    }
}

private void myHandler(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    //Do stuff
}

private void myHandler（对象发送方，RoutedPropertyChangedEventArgs e）
{
//做事
}

您应该能够执行类似的操作

Usercontrol.xaml

<TreeView SelectedItemChanged="TreeViewHandler" />

<local:myUsercontrol TreeViewSelectedItemChanged="myHandler" />

Usercontrol.cs

public delegate void TreeViewSelectedItemHandler(object sender, RoutedPropertyChangedEventArgs<object> e);
public event TreeViewSelectedItemHandler TreeViewSelectedItemChanged;

private void TreeViewHandler(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    //Capture event from usercontrol and execute defined event
    if (TreeViewSelectedItemChanged != null)
    {
        TreeViewSelectedItemChanged(sender, e);
    }
}

private void myHandler(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    //Do stuff
}

public委托void TreeViewSelectedItemHandler（对象发送方，RoutedPropertyChangedEventArgs e）；
公共事件TreeViewSelectedItemHandler TreeViewSelectedItemChanged；
私有void TreeViewHandler（对象发送方，RoutedPropertyChangedEventArgs e）
{
//从usercontrol捕获事件并执行定义的事件
if（TreeViewSelectedItemChanged！=null）
{
TreeViewSelectedItemChanged（发送方，e）；
}
}

Window.xaml

<TreeView SelectedItemChanged="TreeViewHandler" />

<local:myUsercontrol TreeViewSelectedItemChanged="myHandler" />

Window.cs

public delegate void TreeViewSelectedItemHandler(object sender, RoutedPropertyChangedEventArgs<object> e);
public event TreeViewSelectedItemHandler TreeViewSelectedItemChanged;

private void TreeViewHandler(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    //Capture event from usercontrol and execute defined event
    if (TreeViewSelectedItemChanged != null)
    {
        TreeViewSelectedItemChanged(sender, e);
    }
}

private void myHandler(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    //Do stuff
}

private void myHandler（对象发送方，RoutedPropertyChangedEventArgs e）
{
//做事
}

@pilixonis如果答案对你合适，就接受它吧。谢谢。@pilixonis如果答案对你有用，就接受吧。谢谢