将截止日期与当前日期进行比较 [英] Comparing the due date with current date

问题描述

这是关于检查字段中选择的日期等于或大于（=>）到当前日期。所以我有字段ID（00001234）。现在我必须写一个if条件我认为.....任何人都可以帮助我，直到If条件，我会从那里开始，因为我很新，我很少与Dateformats混淆。



提前致谢。



我的尝试：



我尝试使用datetime.now，但是如果条件不正确则写错了。

Hi,

This is about checking the Date selected in the field is equal or greater than (=>)to current date. So i have the field ID (00001234). Now i have to write an if condition i think..... Can anyone help me till the If condition, i will take it forward from there as i am very new and i am little confused with Dateformats.

Thanks in advance.

What I have tried:

I tried using datetime.now but failed to write proper if condition.

推荐答案

理想情况下，当您比较日期时，您应该同时拥有这两个日期在相同的格式，否则你将得到奇怪的输出。这是一个用于日期比较的小片段。

Ideally when you compare dates you should have both the dates in same format otherwise you will end up with weird output. This is a small snippet for date comparison.

public void CompareDates()
        {
            string inputDate = "05/21/2016";
            DateTime convertedDate = DateTime.Parse(inputDate);//will have time part as well.
            DateTime nowDate = DateTime.Now;

            //The following code will consider time part in date.
            if (nowDate >= convertedDate)
            {
                //nowDate is greater or equal
            }
            else
            {
                //convertedDate is greater
            }

            //The following code will consider only date(no time)
            if (nowDate.Date >= convertedDate.Date)
            {
                //nowDate is greater or equal
            }
            else
            {
                //convertedDate is greater
            }
        }

将调试器放在代码的最开头，看看编译器在每行上给你的内容。有关不同的日期格式，请参阅此 [ ^ ]和这个 [ ^ ]链接

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