[WPF]实现TextBox文本框单击全选

原文:[WPF]实现TextBox文本框单击全选

/// <summary>

/// Void:设置获取焦点时全选文本

/// </summary>

/// <param name="textbox">指定文本框</param>

public void SetSelectionAllOnGotFocus(TextBox textbox)

{

MouseButtonEventHandler _OnPreviewMouseDown = (sender, e) =>

{

TextBox box = e.Source as TextBox;

box.Focus();

e.Handled = true;

};

RoutedEventHandler _OnLostFocus = (sender, e) =>

{

TextBox box = e.Source as TextBox;

box.PreviewMouseDown += _OnPreviewMouseDown;

};

RoutedEventHandler _OnGotFocus = (sender, e) =>

{

TextBox box = e.Source as TextBox;

box.SelectAll();

box.PreviewMouseDown -= _OnPreviewMouseDown;

};

textbox.PreviewMouseDown += _OnPreviewMouseDown;

textbox.LostFocus += _OnLostFocus;

textbox.GotFocus += _OnGotFocus;

}

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原文地址：https://www.cnblogs.com/lonelyxmas/p/12075360.html