WEB中的按键查询 [英] Keypress questin in WEB

问题描述

我使用此代码

I use this code

Private void txtnumber_KeyPress(Object sender,KeyPressEventArgs e)
{
     if(!char.IsNumber(e.Keychar))
      {
          e.Handled =true;
      }
}

用于过滤用户数据的是数字.因此，此代码不能在C#Web中使用.
我该怎么办?请帮我

to filter user data is be number .So this codes can not use in C# Web.
How can I do?please help me

推荐答案

请写以下( .aspx )

Hi,

Please write following (.aspx)

<SCRIPT LANGUAGE="JavaScript">
function checkNumber(evt) {
    evt = (evt) ? evt : window.event
    var charCode = (evt.which) ? evt.which : evt.keyCode
    if (charCode > 31 && (charCode < 48 || charCode > 57)) {
        //This field accepts numbers only.
        return false
    }
    return true
}
</SCRIPT>

请在( .aspx.cs )
中写以下内容

Please write following in (.aspx.cs)

Page_Load(..)
{
   if(!isPostBack)
   {
        txtnumber.Attributes.Add("onkeypress","return checkNumber(event)");
   }
}

谢谢，
Imdadhusen

Thanks,
Imdadhusen

请查看以下讨论:

1- http://www. dotnetspider.com/forum/3606-how-can-i-get-key-press-event-asp-net-C.aspx [ http://forums.asp.net/t/1124980. aspx/1?ASP + NET + TextBox + KeyPress + Event [

Please have a look at these discussions:

1 - http://www.dotnetspider.com/forum/3606-how-can-i-get-key-press-event-asp-net-C.aspx[^]. This one is regarding entering for numbers only.

2 - http://forums.asp.net/t/1124980.aspx/1?ASP+NET+TextBox+KeyPress+Event[^]

Hope this helps. :thumbsup:

总是有jQuery:将事件处理程序绑定到"keypress" JavaScript事件，或在元素上触发该事件 [ ^ ]

最好的问候
Espen Harlinn

There is always jQuery: Bind an event handler to the "keypress" JavaScript event, or trigger that event on an element[^]

Best regards
Espen Harlinn

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