如何在Visual Studio 2017中的C＃Razor中获取当前日期

Question

I've got some C# Razor code that is supposed to generate the current date and format it into the following string format - yyyy-mm-dd . It doesn't seem to be working with the code I'm using. I'm getting 2001-01-02 instead of the current date. I'm not sure what I'm doing wrong here. Doesn't the DateTime() give the current date by default?

var today = new DateTime();
var dd = today.Date.Day;

var mm = today.Month + 1;
var yyyy = today.Year;

var yyyy_string = yyyy.ToString();
var mm_string = mm.ToString();
var dd_string = dd.ToString();

if (dd < 10)
{
    dd_string = '0' + dd_string;
}

if (mm < 10)
{
    mm_string = '0' + mm_string;
}
var today_string = yyyy_string + '-' + mm_string + '-' + dd_string;

Answer 1

You can get the formatted current date plus one month with

string today_string = DateTime.Now.AddMonths(1).ToString("yyyy-MM-dd");

Outputs something like "2019-07-27" where month and day have always two digits.

Note that the format "yyyy-Md" would produce months and days with one digit for numbers < 10.

The static property DateTime.Now yields the current date and time. We could also use DateTime.Date to strip off the time part, but this is not necessary, as we specify the desired format in ToString .

You are adding 1 to the month number. This is wrong, as in December, you would get 13. Also, at the 31st of a month (eg Jan 31) you would get Feb 31 as a result. So, it is better to add 1 month to the whole date with .AddMonths(1) . This method takes care to produce a valid date.

Answer 2

Can't you just use DateTime.Now?;

    var today = DateTime.Now;
    var dd = today.Date.Day;

    var mm = today.Month + 1;
    var yyyy = today.Year;

    var yyyy_string = yyyy.ToString();
    var mm_string = mm.ToString();
    var dd_string = dd.ToString();

    if (dd < 10)
    {
        dd_string = '0' + dd_string;
    }

    if (mm < 10)
    {
        mm_string = '0' + mm_string;
    }
    var today_string = yyyy_string + '-' + mm_string + '-' + 
    dd_string;