聚焦时如何选择TextBox WPF中的所有文本? [英] How to select all text in TextBox WPF when focused?

问题描述

我已尝试使用以下代码在获得焦点时选择文本框中的所有文本.但这行不通.

I have tried the below code to select all text in textbox when focus. But this is not working.

XAML:

        <TextBox Text="test1" Width="100" Height="200"  
           GotFocus="TextBox_GotFocus"></TextBox>

c#:

private void TextBox_GotFocus(object sender, RoutedEventArgs e)
        {
            (sender as TextBox).SelectAll();    
            //(sender as TextBox).Select(0, (sender as TextBox).Text.Length);
            (sender as TextBox).Focus();  
            e.Handled = true;
        } 

我也尝试过异步.冲浪很多，但没有任何效果.请推荐?

I have tried with asynchronous also. Surf lots , but nothing works. Please suggest?

推荐答案

您可以使用调度程序:

private void TextBox_GotFocus(object sender, RoutedEventArgs e)
{
    TextBox textBox = (TextBox)sender;
    textBox.Dispatcher.BeginInvoke(new Action(() => textBox.SelectAll()));
}

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