检查RadDateTimePicker值与当前系统日期时间值

Question

如何验证 RadDateTimePicker 中选定的日期时间值是否大于使用服务器端验证的 asp.net中的当前系统日期时间值。

<telerik:RadDateTimePicker runat="server" ID="orderDate" >
      <Calendar ID="Calendar1" runat="server" EnableKeyboardNavigation="true">
        </Calendar>
</telerik:RadDateTimePicker>

Answer 1

要验证它，您需要使用CompareValidator或CustomValidator。

请使用以下日期时间选择器标记：

<telerik:RadDateTimePicker runat="server" ID="orderDate">
   <Calendar ID="Calendar1" runat="server" EnableKeyboardNavigation="true">
   </Calendar>
</telerik:RadDateTimePicker>
<asp:CustomValidator ID="cvOrderDate" runat="server" ControlToValidate="orderDate" ValidationGroup="vgSubmit" ErrorMessage="Please use correct date" OnServerValidate="cvOrderDate_ServerValidate"></asp:CustomValidator>

代码背后：

protected void cvOrderDate_ServerValidate(object source, ServerValidateEventArgs args)
{
  args.IsValid = orderDate.SelectedDate.Value > DateTime.Now;
}

此处还有一个RadDateTimePicker验证演示http://demos.telerik.com/aspnet-ajax/calendar/examples/datetimepicker/validation/defaultcs.aspx