创建仅接受文本的WPF文本框

Question

private void txtLastName_PreviewKeyDown(object sender, KeyEventArgs e) 
    { 
     if (!char.IsDigit((char)e.Key)) e.Handled = true; 
    } 

但它不支持键盘上的所有键。

Answer 1

您必须使用IsLetter。

private void txtLastName_PreviewKeyDown(object sender, KeyEventArgs e) 
    { 
     if (Char.IsLetter((char)e.Key)) e.Handled = true; 
    } 

Answer 2

private void txtLastName_PreviewTextInput(object sender, TextCompositionEventArgs e) 
    { 
     if (!System.Text.RegularExpressions.Regex.IsMatch(e.Text, "^[a-zA-Z]")) 
     { 
      e.Handled = true; 
     } 
    }