如何将TextBlock的text属性绑定到TextBox的text属性的数据 [英] How to data bind the text property of a TextBlock to the text property of a TextBox

问题描述

我有一个包含两页的WPF应用程序.在第一页上，有一个TextBox(boxSource).在第二页上，我有一个TextBlock(blockDestination).我想在XAML中将boxSource的Text属性绑定到blockDestination的Text属性.

I have a WPF application with two pages. On page one, there is a TextBox (boxSource). On page two, I have a TextBlock (blockDestination). I want to databind in XAML, the Text property of boxSource to the Text property of blockDestination.

初始化应用程序时，我将第二页的DataContext设置为第一页.我将blockDestination设置如下:

I set the DataContext of page two to page one when the application is initialized. I setup blockDestination as follows:

<TextBlock Name="blockDestination" Grid.Row="0" Grid.Column="1" Text="{Binding boxSource, Path=Text, Mode=OneWay}" />

这不会获取TextBox的值.我的猜测是因为TextBox是变量而不是属性?

This does not pickup the value of the TextBox. My guess is that it is because the TextBox is a variable instead of a property?

任何人都可以解释这个问题，并且有一个优雅的解决方案吗?

Can anyone explain the issue, and is there an elegant solution?

感谢您的帮助

推荐答案

为使该XAML正常工作，您需要将第一页"设置为第二页的数据上下文，并将boxSource变量定义为一个属性，因此，在设置器中，您可以引发PropertyChanged事件.

For that XAML to work, your "page one" will need to be set as the data context of page two, with the boxSource variable defined as a property, so that in the setter, you can raise the PropertyChanged event.

Matthias是正确的，但这是实现此目标的一种非常脆弱的方法，并且是MVVM方法从长远来看将更可靠的地方之一.

Matthias is right, though, this is a pretty brittle way to implement this, and one of the places where an MVVM approach will be more robust in the long run.

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