将焦点设置在 xaml wpf 中的文本框上 [英] Set the focus on a textbox in xaml wpf

问题描述

尽管这个论坛和其他一些帖子我找不到告诉我如何将焦点设置在 TextBox 上的内容.

Despite some posts on this forum and others i cannot find something that tells me how to set the focus on a TextBox.

我有一个带有许多标签和文本框的用户控件.加载表单时，我希望特定的文本框具有焦点.

I have a userControl with many labels and textBoxes. When the form is loaded I want the a particular textBox to have the focus.

我已经设置了 tabIndex，但这似乎不起作用.

I have set the tabIndex but that didn't seem to work.

有什么建议吗?

推荐答案

您可以为此目的使用 FocusManager.FocusedElement 附加属性.这是一段默认将焦点设置为 TxtB 的代码.

You can use the FocusManager.FocusedElement attached property for this purpose. Here's a piece of code that set the focus to TxtB by default.

<StackPanel Orientation="Vertical" FocusManager.FocusedElement="{Binding ElementName=TxtB}">
    <TextBox x:Name="TxtA" Text="A" />
    <TextBox x:Name="TxtB" Text="B" />
</StackPanel>

如果您不想在 XAML 中执行此操作，也可以在代码隐藏中使用 TxtB.Focus().

You can also use TxtB.Focus() in your code-behind if you don't want to do this in XAML.

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