如何获取两个日期之间选择的总天数？

Question

I have this jquery script that allows a user to choose a start date and end date:

<script type="text/javascript" charset="utf-8">
    $(document).ready(function () {

        $('#txtToDate').datepicker({ showOn: 'button',
            buttonImage: 'images/20/calendar200.gif',
            buttonImageOnly: true, onSelect: function () { },
            onClose: function () { $(this).focus(); }
        });


        $('#txtFromDate').datepicker({ showOn: 'button',
            buttonImage: 'images/20/calendar200.gif',
            buttonImageOnly: true, onSelect:
        function (dateText, inst) {
            $('#txtToDate').datepicker("option", 'minDate', new Date(dateText));
        }
      ,
            onClose: function () { $(this).focus(); }
        });
        $('#txtToDate').datepicker({
       // Your other options here
        onSelect: function(dateText, inst) {
        var days = ($("#txtToDate").datepicker('getDate') - 
            $("#txtFromDate").datepicker('getDate'))/(24*60*60*1000);
        $('#numOfDays').val(days);
       console.log(days);
    }
  }
  );  

    });  
</script>

Then I have a textbox control:

<asp:TextBox ID="numOfDays" class="fptextbox12" runat="server" style="width:60px;"></asp:TextBox>

Once a user chooses a start date and an end date, we would like the total number of days in that box.

Any ideas how to calculate this?

Answer 1

Add the onSelect option to the datepicker and calculate the number of days.

$('#txtToDate').datepicker({
        // Your other options here
        onSelect: function(dateText, inst) {
            var days = ($("#txtToDate").datepicker('getDate') - 
                $("#txtFromDate").datepicker('getDate'))/(24*60*60*1000);
            $('#numOfDays').val(days);
        }
    }
);