如何将月份添加到输入的日期时间值？ [英] How to add month to entered datetime value?

问题描述

我有一个文本框，我在其中获取一个日期时间值，例如'7/27/2015 12:00:00 AM'，我有一个下拉列表控件，其中包含每月，每季度，每半年，每年的列表。那么如何通过更改下拉期来仅在该日期添加几个月？



我尝试如下，但如果月份超过12，则额外的月份和年份不会改变。< br $> b $ b

我的尝试：

I have one textbox in which i am getting one datetime value for example '7/27/2015 12:00:00 AM', and I have one dropdown list control with the list of Monthly,Quarterly,HalfYearly,Yearly. So how to add only months on that date by changing the dropdown periods?

I tried like below but getting extra months and year not changing if month get above 12.

What I have tried:

var d = new Date($("#<%=txtActDate.ClientID%>").val());
            var curr_date = d.getDate();                            
            if (packPeriod == 'Monthly') {

                 var curr_month = d.getMonth() + 1;
            var curr_year = d.getFullYear();
            var dates = curr_date + "/" + curr_month + "/" + curr_year;
              alert(dates );
            }
            else if (packPeriod == 'Quarterly') {
              var curr_month = d.getMonth() + 3;
            var curr_year = d.getFullYear();
            var dates = curr_date + "/" + curr_month + "/" + curr_year;
                alert(dates );
            }
            else if (packPeriod == 'HalfYearly') {
               var curr_month = d.getMonth() + 6;
            var curr_year = d.getFullYear();
            var dates = curr_date + "/" + curr_month + "/" + curr_year;
                alert(dates );
            }
            else if (packPeriod == 'Yearly') {
              var curr_month = d.getMonth() + 12;
            var curr_year = d.getFullYear();
            var dates = curr_date + "/" + curr_month + "/" + curr_year;
                alert(dates );
            }

推荐答案

（＃<％= txtActDate.ClientID％>）。val（））;
var curr_date = d.getDate（）;
if（packPeriod =='Monthly'）{

var curr_month = d.getMonth（）+ 1;
var curr_year = d.getFullYear（）;
var dates = curr_date +/+ curr_month +/+ curr_year;
提醒（日期）;
}
else if（packPeriod =='Quarterly'）{
var curr_month = d.getMonth（）+ 3;
var curr_year = d.getFullYear（）;
var dates = curr_date +/+ curr_month +/+ curr_year;
提醒（日期）;
}
else if（packPeriod =='HalfYearly'）{
var curr_month = d.getMonth（）+ 6;
var curr_year = d.getFullYear（）;
var dates = curr_date +/+ curr_month +/+ curr_year;
提醒（日期）;
}
else if（packPeriod =='Yearly'）{
var curr_month = d.getMonth（）+ 12;
var curr_year = d.getFullYear（）;
var dates = curr_date +/+ curr_month +/+ curr_year;
提醒（日期）;
}

("#<%=txtActDate.ClientID%>").val()); var curr_date = d.getDate(); if (packPeriod == 'Monthly') { var curr_month = d.getMonth() + 1; var curr_year = d.getFullYear(); var dates = curr_date + "/" + curr_month + "/" + curr_year; alert(dates ); } else if (packPeriod == 'Quarterly') { var curr_month = d.getMonth() + 3; var curr_year = d.getFullYear(); var dates = curr_date + "/" + curr_month + "/" + curr_year; alert(dates ); } else if (packPeriod == 'HalfYearly') { var curr_month = d.getMonth() + 6; var curr_year = d.getFullYear(); var dates = curr_date + "/" + curr_month + "/" + curr_year; alert(dates ); } else if (packPeriod == 'Yearly') { var curr_month = d.getMonth() + 12; var curr_year = d.getFullYear(); var dates = curr_date + "/" + curr_month + "/" + curr_year; alert(dates ); }

在这篇文章中看看bmpasini的答案 - Javascript函数将X个月添加到日期 - Stack Overflow [ ^ ]



NB - 最受欢迎（和接受）的解决方案实际上无法正常工作 - 使用bmpasini中的一个

Have a look at the answer from bmpasini on this post - Javascript function to add X months to a date - Stack Overflow[^]

NB - the most popular (and the accepted) solution doesn't actually work properly - use the one from bmpasini

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