验证日期 后台和前端

using System.Web.UI;

using System.Web.UI.WebControls;
//后台代码

public partial class A:System.Web.UI.Page

{

  protected void Page_Load(object sender,EventArgs e)

 {

  if(!IsPostBack)

   {

     validatorGradeDateLessThanNow.ValueToCompare=DateTime.Now.ToShortDateString();

   }

 }

  protected void custValidatorMonthDay_ServerValidate(object source,ServerValidateEventArgs args)

  {

  int month=Convert.ToInt32(txtMonth.Text);

  int day=Convert.ToInt32(args.Value);

  //

  int[] data=new int[]{31,29,31,30,..};

  int days=data[month-1];

  args.IsValid=(day>=1&&day<=days);

  }

}
// 客户端代码

 <title></title>

 <script type="text/javascript">

   function dayValidate(src,args)

   {

       var txtMonth=document.getElementById("<%=txtMonth.ClientID %>");

       var  month=parseInt(txtMonth.value,10);

       var day=parseInt(args.value,10);

       var data=[31,29,31,30,..];

       var days=data[month-1];

       args.IsValid=(day>=1&&day<=days);

   }

  </script>

 

<asp:CustomValidator ID="custValidatorMonthDay" runat="server"

     ClientValidateionFunction="dayValidate"

     ControlToValidate="txtDay" ErrorMessage="CustomValidator"

     onservervalidate="custValidatorMonthDay_ServerValidate">

</asp:CustomValidator>