日历自定义验证器 [英] Calendar Custom Validator

问题描述

有人可以建议如何为 Web 窗体日历控件实现自定义验证器吗?显然，RequiredValidator 和 CustomValidator 都不是开箱即用的 Calendar 控件.

Can someone suggest how to implement a custom validator for a Web Forms Calendar control? Apparently, neither RequiredValidator nor CustomValidator work out of the box with the Calendar control.

Microsoft 提供的一种解决方案是扩展日历:

One solution offered by Microsoft is to extend the Calendar:

如何使用 Visual C# 扩展 Web 表单控件以使用验证控件

没有更简单的解决方案吗?

Is there not a simpler solution?

推荐答案

我终于让它这样工作了:

I finally got it to work this way:

<asp:Calendar ID="startCalendar" CssClass="startDate" 
    OnSelectionChanged="Selection_Changed" runat="server"></asp:Calendar>
<asp:CustomValidator ID="dateCustVal" OnServerValidate="DateCustVal_Validate" 
    runat="server"></asp:CustomValidator>

protected void DateCustVal_Validate(object source, ServerValidateEventArgs args)
{            
    if (startCalendar.SelectedDate == null 
        || startCalendar.SelectedDate == new DateTime(0001, 1, 1, 0, 0, 0))
    {
        args.IsValid = false;
    }
    else
    {
        args.IsValid = true;
    }
}

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