将值从子窗口传回 MainPage [英] Pass value from child window back to MainPage

问题描述

我在 Silverlight 中有一个子窗口，我希望发送一个字符串值来填充应用程序 MainPage.xaml 中的文本框.

I have a child window in Silverlight and I wish to send a string value to populate a text box in the applications MainPage.xaml.

如何将值传回?

我已经试过了 -

MainPage m = (MainPage)Application.Current.RootVisual;
m.textBox1.Text = value;

推荐答案

你应该反过来做.打开子窗口的父窗口应该为子窗口的事件附加一个事件处理程序，例如:

You should do this the other way around. The parent that opens the child window should attach an event handler to an event of the child, for example:

 childwindow.ButtonClicked += new EventHandler(childWindow_ButtonClicked);

在此处理程序中，父级可以使用子窗口的属性值更新自己的控件.

Within this handler, the Parent can update its own Controls with values from properties of the child Window.

private void childWindow_ButtonClicked(object sender, EventArgs e)
      {
            txtValue.Text = childwindow.Value;
      }

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