Asp.net比较验证器以验证日期

Question

众所周知,比较验证器可用于验证日期并根据运营商类型(<,<=,> =等)进行检查.我已将该cultureinvariantvalues="true"属性设置为验证两个包含日期的文本框控件.我必须约束它们,使得开始日期必须早于完成日期.当我输入如下所示的描述性日期时,验证似乎失败:

StartDate: Tuesday, 21 February 2012

FinishDate: Wednesday, 22 February 2012

即使22nd大于21,验证也会失败.我使用的标记如下.如果由于任何原因你需要格式信息,这里是dddd, dd MMMM yyyy

<asp:CompareValidator id="cvtxtStartDate" runat="server" 
       controltocompare="txtFinishDate" 
       cultureinvariantvalues="true" 
       display="Dynamic" 
       enableclientscript="true" 
       controltovalidate="txtStartDate" 
       errormessage="Start date must be earlier than finish date" 
       type="Date" 
       setfocusonerror="true" 
       operator="LessThanEqual" 
       text="Start date must be earlier than finish date">

Answer 1

尝试这种方法,首先输入开始日期并检查比较验证器和结束日期文本框:

<asp:CompareValidator id="cvtxtStartDate" runat="server" 
     ControlToCompare="txtStartDate" cultureinvariantvalues="true" 
     display="Dynamic" enableclientscript="true"  
     ControlToValidate="txtFinishDate" 
     ErrorMessage="Start date must be earlier than finish date"
     type="Date" setfocusonerror="true" Operator="GreaterThanEqual" 
     text="Start date must be earlier than finish date"></asp:CompareValidator>

Answer 2

比较验证器具有类型=日期。但该日期类型被限制为仅接受特定格式的日期，即 ToShortDateString()。如果要比较的两个文本框的日期格式是其他格式，如 ToLongDateString() 或 ToString("dd MMMM,yyyy") 指定的某种格式，则比较不起作用。CustomValidator 是唯一的选项。如果您只想使用比较验证器

textstartdate.text=Calendar1.SelectedDate.ToShortDateString();
textfinishdate=Calendar2.SelectedDate.ToShortDateString();
<asp:CompareValidator ID="CompareValidator4" runat="server" 
                    ControlToCompare="textstartdate" ControlToValidate="textfinishdate" 
                    CultureInvariantValues="True" 
                    ErrorMessage="Date should be greater than booking date." 
                    Operator="GreaterThanEqual" SetFocusOnError="True" Type="Date"></asp:CompareValidator>