从另一个窗口调用函数 [英] Call function from another window

问题描述

我从另一个窗口调用一个MainWindow函数时遇到问题。

I have a problem with call of one MainWindow function from another windows.

我有4个窗口：MainWindow，Window1，Window2和Window3。 MainWindow打开Window1，Window1打开window2，Window2打开Window3。我想从Window1和Window3调用MainWindow函数。我可以从Window1调用此函数，但是我不知道如何从Window3调用此函数。

I have 4 windows: MainWindow, Window1, Window2 and Window3. MainWindow open Window1, Window1 open window2 and Window2 open Window3. I want to call MainWindow function from Window1 and Window3. I can call this function from Window1 but i don't know how to do this from Window3.

代码：从Window1调用MainWindow函数：

Code: call MainWindow function from Window1:

MainWindow：

MainWindow:

private void button2_Click(object sender, RoutedEventArgs e)
{
     Window1 w1 = new Window1();
     w1.Owner = this;
     w1.ShowDialog();
}

Window1：

public void button_cancel_Click(object sender, RoutedEventArgs e)
{         
    var myObject = this.Owner as MainWindow;
    myObject.ruLanguage();
}

ruLanguage（）; -要从MainWindow调用的函数

ruLanguage(); - functon to call from MainWindow

推荐答案

在WPF中，您可以通过 Application.MainWindow 属性

In WPF, you can access the main window through the Application.MainWindow property.

public void button_cancel_Click(object sender, RoutedEventArgs e)
{         
    var myObject = Application.MainWindow as MainWindow;
    myObject.ruLanguage();
}

您还可以在Windows上定义属性，因此可以像这样使用它们：

You could also define properties on your windows, so you could use them like that:

public MainWindow AppMainWindow { get; set; }

private void button2_Click(object sender, RoutedEventArgs e)
{
     Window1 w1 = new Window1();
     w1.Owner = this;
     w1.AppMainWindow = this;
     w1.ShowDialog();
}

然后传递 AppMainWindow

And then pass the value of AppMainWindow around.

另外，您可能需要重新考虑设计。了解MVVM模式，这是使用WPF的更好方法。

As a side note, you may want to reconsider your design. Learn about the MVVM pattern, it's the better way to use WPF.

这篇关于从另一个窗口调用函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！