文本框的动态丢失焦点事件会引发错误

Question

失去焦点事件代码：

public void myTextBox_LostFocus(object sender, System.Windows.Input.GestureEventArgs e)
    {
        string name = ((TextBox)sender).Name;

        string strl = "tbox" + name.Substring(4);
        TextBox text = FindTextBoxByName(strl);

        text.HorizontalAlignment = HorizontalAlignment.Left;
        text.Width = 50;
        text.Height = 40;
    }

事件致电： -

 myTextBox1j.LostFocus += new EventHandler<GestureEventArgs>(myTextBox_LostFocus);

引发以下错误： - 无法隐式转换类型＆＃39; System.EventHandler＆＃39;到＆＃39; System.Windows.RoutedEventHandler＆＃39;

Answer 1

LostFocus事件需要RoutedEventHandler，而不是EventHandler。

myTextBox1j.LostFocus += new RoutedEventHandler(myTextBox_LostFocus);

这也应该有效：

myTextBox1j.LostFocus += myTextBox_LostFocus;