Year in const string C#

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1.00/5 (2 votes)

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Neeed year in cons string

C#

const string DATE_FORMAT = DateTime.Now.ToString('yyyy');

What I have tried:

C#

const string DATE_FORMAT = DateTime.Now.ToString('yyyy');

Posted 15-Dec-22 1:27am

Stylus STYLUS

Updated 15-Dec-22 1:45am

PIEBALDconsult

v2

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Stylus STYLUS 15-Dec-22 8:34am

c#

PIEBALDconsult 15-Dec-22 7:40am

You want QUOTEs ("); not APOSTROPHEs (').

Stylus STYLUS 15-Dec-22 8:34am

Same error

Richard Deeming 15-Dec-22 8:56am

What, the error that you mentioned in your question?

Oh, that's right; you didn't mention any error. You just showed some unexplained code that won't compile for a number of reasons, and told us you need a non-constant value in a constant string.

And yet based on the name of the constant, I suspect you may actually want to store the date format string, not the value for the current date.

Perhaps if you provided a clear explanation of precisely what you are trying to do and why, we might be able to help you.

Stylus STYLUS 15-Dec-22 9:09am

const string DATE_FORMAT = DateTime.Now.ToString('yyyy');

const string strCon2 = "Data Source=.\\SQLEXPRESS;Initial Catalog=BSS "+DATE_FORMAT+";Integrated Security=True";

error CS0133: The expression being assigned to 'Program.DATE_FORMAT' must be constant

Richard Deeming 15-Dec-22 9:11am

So this question is a repost of your other question then:
Year and text string in conn string C#[^]

Delete this copy, since it doesn't have anywhere near enough information in it.

And in future, if you want to update your question to add more information, click the green "Improve question" link and update your question. Do not post the update as a new question.

Stylus STYLUS 15-Dec-22 9:14am

Solved. You solve. Thank you

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OriginalGriff · Answer 1 · 2022-12-15T01:45:00

Solution 1

You can't assign anything to a const field unless that initial value can be determined at compile time.

Use a readonly field instead, and set the value in the class constructor.

Posted 15-Dec-22 1:45am

OriginalGriff

Comments

Dave Kreskowiak 15-Dec-22 9:44am

JFC, you are not listening AT ALL. YOU CANNOT USE const IN THIS CODE! CHANGE const TO readonly!

OriginalGriff 15-Dec-22 10:16am

And there I was thinking I couldn't be much clearer ... :sigh:

Dave Kreskowiak 15-Dec-22 10:22am

My laptop sometimes needs threats to get it to listen. I used to sit by a window on the second floor. ;)