使用它：



http://***.com/questions/463299/how-do-i-make-a-textbox-that -only-accepted-numbers [ ^ ]

而不是 TextChanged 事件，请使用 KeyPress 事件，并尝试以下代码：

Instead of the TextChanged event, use the KeyPress event, and try this code:

static HashSet<char> allowedChars = new HashSet<char>() { { '\b', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' }; // you can add more chars if you want
private void txt1_KeyPress(object sender, KeyPressEventArgs e)
{
     if (!allowedChars.Contains(e.KeyChar))
     {
         e.Handled = true; // setting e.Handled to true cancels the KeyPress event
     }
}

希望这会有所帮助。



数组已更改为 HashSet 并将其设为 static ，如PIEBALDconsult建议[/ Edit]

Hope this helps.

Array changed into HashSet and made it static, as PIEBALDconsult suggested[/Edit]

hi，men！

使用Regex类，你可以这样做。

men!
use the Regex class ,you can do that .