C How do I get the next day date of the system? And convert to yyyy mm dd format?

Tomorrow:"yyyy-mm-dd");

Yesterday:"yyyy-mm-dd");

If you don't understand, you can ask.

If satisfied, hope.

o(∩_o~

c How do I convert a date in yyyy-mm-dd hh:mm:ss format to yyyymmddhhmmss format?

Method 1 string result=,"yyyy-mm-dd ",null).tostring

yyyymmddhhmmssfff");

Method 2: Remove "-" and "" ".

string result=, @"[\-", " ");

Method 3: string result ="yyyymmddhhmmssfff");

1、"",dt);//2005-11-5 14:232、"",dt);2005 11 5 14:23:20 This format is more suitable for foreigners.

The same is true for decimal (which is quite useful for data with a database data type of money).

var dd = ;,dd)

The result is displayed as noticing that there is no rounding.

If dt=null, it is also possible, but if it is null, it will be empty.

datetime t = ;

string s = "yyyyymmdd hh:mm:ss");

Strings date and time strings.

Convert from string 1 to date type.

Convert from date type to formatted string 2 with tostring("yyyy-mm-dd"Something like this.

c How do I convert a date in yyyy-mm-dd hh:mm:ss format to yyyymmddhhmmss format? Method 1.

If you are sure that the string you want to convert must be in time format, you can use this);

Otherwise, if isparse is true, the conversion success value is assigned to dt, otherwise the conversion fails.

datetime dt=new datetime()bool isparse= ,out dt);

It's so troublesome, you might as well directly convert the time to the yyyymmdd number type and compare it directly, it's the same effect.

Compare directly with dates.

var today = ;

var dt = ;

Use the tryparse method to convert the character date if (,out dt)).

else

You can first turn int to datetime

Or you try ;

c Obtain the next day date of the system and convert it to (yyyy-mm-dd) format as follows:

string result ="yyyymmddhhmmssfff");

Don't understand what you mean?

yyyy-mm-dd hh:mm:ss")；

yyyy-mm-dd")；

hh:mm:ss")；

This is a time conversion function, independent of the local time format!

Another way is to directly modify the time format in the computer, and modify it to yyyy-mm-dd hh:mm:ss

The format is just fine!