当 UserControl 更改可见性时聚焦于 TextBox

发布于 2024-09-07 08:39:44 字数 489 浏览 3 评论 0原文

我在画布内加载了一个用户控件；默认情况下，此用户控件的可见性已折叠。当我的窗口的特定文本框聚焦时，用户控件变得可见。

当用户控件变得可见时，我想将焦点设置到用户控件内的另一个文本框。

我尝试这样做：

private void UserControl_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
{
        if (this.Visibility == Visibility.Visible)
        {                
            FocusManager.SetFocusedElement(this, TextBlockInput);
        }
}

看起来可行，但有一个问题：文本框似乎已聚焦，但文本框中的光标不闪烁，并且我无法键入字符进行输入。

我希望焦点之后文本框就可以输入了。我该怎么办？

原文

I have a usercontrol loaded inside a canvas; this usercontrol on default have visibility collapsed. When a specific textbox of my window is focused the usercontrol become visible.

When usercontrol become visible I want set focus to another textbox inside usercontrol.

I try to do that:

private void UserControl_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
{
        if (this.Visibility == Visibility.Visible)
        {                
            FocusManager.SetFocusedElement(this, TextBlockInput);
        }
}

It seems work but there is a problem: the textbox seems focused but the cursor into textbox don't blink and I can't type chars for input.

I would that after focus the textbox is ready for input. How can I do?

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≈。彩虹 2024-09-14 08:39:44

好吧，我以这种方式解决：

private void UserControl_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
{
    if (this.Visibility == Visibility.Visible)
    {
        this.Dispatcher.BeginInvoke((Action)delegate
        {
            Keyboard.Focus(TextBlockInput);
        }, DispatcherPriority.Render);
    }
}

我认为问题在于焦点调用 IsVisibleChanged 事件“范围”......对吗？

Well, I solve in this way:

private void UserControl_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
{
    if (this.Visibility == Visibility.Visible)
    {
        this.Dispatcher.BeginInvoke((Action)delegate
        {
            Keyboard.Focus(TextBlockInput);
        }, DispatcherPriority.Render);
    }
}

I think that the problem was tha focus call into IsVisibleChanged event "scope"...right?

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