How to find last month number in C#

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hello

i want to just retrive the last month number in c# i have try but i will get only current month.

What I have tried:

string MonthNumber = DateTime.Now.Month.ToString();
i have used above code it will give me current month number i want last months number
also tried this DateTime month = DateTime.Now.AddMonths(-1);
but it will give me hole date i just want the month number

Posted 28-Sep-16 1:26am

AZHAR SAYYAD

Updated 28-Sep-16 10:35am

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Comments

Philippe Mori 28-Sep-16 18:52pm

Press F1 in Visual Studio while the caret in on DateTime and read the documentation! And even simpler, just let IntelliSense show you available properties.

4 solutions

Solution 4

Another way to do it with a test:

C#

int MonthNumber = DateTime.Now.Month-1;
if (MonthNumber == 0)
    MonthNumber = 12;

Another way to do it without test:

C#

int MonthNumber = ((DateTime.Now.Month+10)%12)+1;

Principle
Months are from 1 (January) to 12 (December).
Previous month of January is December
There is a mathematical function called modulus, but it is zero based (from 0 to 11) and it don't like negative values.
Fortunately month-1 is the same as month+11

Posted 28-Sep-16 10:35am

Patrice T

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OriginalGriff · Accepted Answer · 2016-09-28T01:33:00

Solution 2

Try:

C#

int lastMonth = DateTime.Now.AddMonths(-1).Month;

Posted 28-Sep-16 1:33am

OriginalGriff

Ehsan Sajjad · Accepted Answer · 2016-09-28T01:48:00

Solution 3

You need to get the Month Property as AddMonths(-1) will return a new DateTime instance, do it like:

C#

DateTime LastMonth = DateTime.Now.AddMonths(-1);
Console.WriteLine(LastMonth.Month);

Posted 28-Sep-16 1:48am

Ehsan Sajjad

Updated 28-Sep-16 1:50am

v3

Comments

Karthik_Mahalingam 28-Sep-16 9:25am

5

Suvendu Shekhar Giri · Accepted Answer · 2016-09-28T01:33:00

Solution 1

Try-

C#

string MonthNumber = DateTime.Now.AddMonths(-1).Month.ToString();

Hope, it helps :)

Posted 28-Sep-16 1:33am

Suvendu Shekhar Giri