C#.net中，如何设置textbox只能输入数字？

Question

onkeyup="this.value.replace('',/[^\d]+/g)"
看看好用不

Answer 1

keypress事件里，看情况设置e.Handle
例如
if (e.KeyChar<'0' || e.KeyChar>'9')
    e.Handle=true;

Answer 2

<asp:textbox onkeypress="isnum()" id="TextBox1" runat="server"></asp:textbox>
<script language="javascript">
    function isnum()
    {
        if(event.keyCode<45 || event.keyCode>57)
        {
            event.keyCode=0;
        }
    }                             
</script>

Answer 3

if (Regex.IsMatch(str, @"^[0-9]+$"))
                {
                    return true;
                }
                else
                {
                    return false;
                }

Answer 4

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if ((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8)
            {
                e.Handled = true;
            }
        }

Answer 5

<input
onkeypress="return event.keyCode>=48&&event.keyCode<=57||event.keyCode==46"
onpaste="return !clipboardData.getData('text').match(/\D/)"
ondragenter="return false"
style="ime-mode:Disabled"
>只能输入数字，防止粘贴

Answer 6

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if ((e.KeyChar < 48 || e.KeyChar > 57) )
            {
                e.Handled = true;
            }
        }

Answer 7

  if (!Regex.IsMatch(this.txtNum.Text, @"^-?\d+(\.\d{2})?$"))
            {
                MessageBox.Show("User num is invalid");
            }
            else
            {
                MessageBox.Show("User num is usable");
            }