c# - 日期类型 c#.net 上的比较验证器

Question

如何解决这个问题？我遇到与此链接相关的相同问题，但未得到解答。谁能帮帮我。

 <telerik:RadDatePicker ID="DateTextBox" runat="server" Culture="en-GB" MinDate="1901-01-01"
                                TabIndex="4" FocusedDate="1991-01-01" MaxDate="2099-01-01">
                                <Calendar UseColumnHeadersAsSelectors="False" UseRowHeadersAsSelectors="False" ViewSelectorText="x">
                                </Calendar>
                                <DateInput DateFormat="dd/MM/yyyy" DisplayDateFormat="dd/MM/yyyy" TabIndex="4">
                                </DateInput>                                                                  
                            </telerik:RadDatePicker>

  <asp:CompareValidator ID="dateCompareValidator" runat="server" ControlToValidate="DateTextBox" ToolTip="The date to achieve the objective must be in the future"
                                    ErrorMessage="The date to achieve the objective must be in the future" Operator="GreaterThan" Type="Date"
                                    ValueToCompare='<%# DateTime.Now.ToString() %>'>*</asp:CompareValidator>

Intermittent error with CompareValidator - ValueToCompare property is ""

Answer 1

您必须设置 CompareValidator 的以下属性来验证日期输入。

1. ControlToValidate="controlId"
2. ErrorMessage="错误信息描述"
3. 类型="日期"
4. Operator="DataTypeCheck"

编辑:OP更新后实现。

可能你需要设置yyyy-MM-dd格式。

 ValueToCompare='<%# DateTime.Now.ToString("yyyy-MM-dd") %>'>

查看 telerik 论坛上的主题:

1. http://www.telerik.com/community/forums/aspnet/calendar/raddatepicker-validate-manually-entered-value.aspx
2. http://www.telerik.com/community/code-library/aspnet-ajax/calendar/validation-of-non-mandatory-datepicker-control.aspx
3. http://demos.telerik.com/aspnet-ajax/calendar/examples/datepicker/validation/defaultcs.aspx