Asp.Net Textbox Rakam Kontrolü
<script type="text/javascript">
function onlyNumber(e)
{
var keyCode = event.keyCode;
if ((keyCode < 46 || keyCode > 57) && keyCode != 8 && keyCode != 9 && keyCode != 0 && keyCode != 47 && (keyCode < 96 || keyCode > 105))
{ return false; }
}
</script>
<asp:TextBox ID="txtFiyat" runat="server" onkeydown="return onlyNumber(event)" />