如何将 TextBox 控件限制为仅允许值 0 和 1?
How can I limit the TextBox control to only allow the values 0 and 1?
谢谢.我还有一个问题:如何禁用将剪贴板中的文本放入我的文本框控件?
Thanks. And I have one more question: How can I disable put text from clipboard in my textbox control?
通过使用事件KeyPress
private void NumericOnlyKeyBox_KeyPress(object sender, KeyPressEventArgs e)
{
var validKeys = new[] { Keys.Back, Keys.D0, Keys.D1 };
e.Handled = !validKeys.Contains((Keys)e.KeyChar);
}
将 e.Handled
设置为 true/false 表示该字符是否应该被框接受.
Setting e.Handled
to true / false indicates if the character should be accepted to the box or not.
您可以阅读更多关于 KeyPressEventArgs 在 MSDN 上.
You can read more about KeyPressEventArgs on MSDN.
注意
Keys.Delete 应涵盖 Keys.Delete、Keys.Backspace 和其他返回"按钮.
Keys.Delete should cover Keys.Delete, Keys.Backspace and other "Back" buttons.
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