如何使用下拉列表验证结束日期必须大于开始日期

3 回答

• 0

  尝试这样的事情 .

  <asp:CompareValidator ID="CompareValidatorDate" runat="server"
  ControlToCompare="ddlDate1"
  ControlToValidate="ddlDate2" Display="Dynamic"
  ErrorMessage="date 2nd is must be grater than 1st "
  Operator="LessThanEqual"
  Type="Date" 
  ValueToCompare="<%= ddlDate2.SelectedValue.ToShortString() %>"></asp:CompareValidator>
  

  回复于 2024-04-29T22:26:41+08:00
• 1

  假设您正在使用ASP.Net，您可以使用CompareValidator

  <asp:CompareValidator ID="cmpVal1" ControlToCompare="ddlStartDate" 
           ControlToValidate="ddlEndDate" Type="Date" Operator="GreaterThanEqual"   
           ErrorMessage="*Invalid Data" runat="server"></asp:CompareValidator>
  

  回复于 2024-04-29T22:26:41+08:00
• 1

  如果您正在使用JavaScript，那么您可以只使用简单的if条件来比较日期

  var startDate = document.getElementById("StartDate").value;
  var endDate = document.getElementById("EndDate").value;
  
  if ((Date.parse(startDate) <= Date.parse(endDate))) {
      alert("End date should be greater than Start date");
      document.getElementById("EndDate").value = "";
  }
  

  回复于 2024-04-29T22:26:41+08:00