Is there a way to set a string to specific value if the string is null?

Question

Given this:

var a = myString;

What I would like to do is to set the value of a to be "0.0.0" if the value of myString is null.

I know I can do this with some if check but is there a cleaner way to do this in the newer versions of C#?

`var a = myString ?? "0.0.0";` – Dmitry Bychenko Apr 24 '19 at 08:01 — Dmitry Bychenko, Apr 24 '19 at 08:01

score 3 · Accepted Answer · answered Apr 24 '19 at 08:01

3

Try this:

var a = myString ?? "0.0.0";

In the end it's an if statement but written differently.

answered Apr 24 '19 at 08:01

user11909

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This is far from an `if statement` actually... – Asunez Apr 24 '19 at 08:03
@Asunez If you think of C#, that you're right. But the machine is executing the same operations in the end. – user11909 Apr 24 '19 at 08:07

score 1 · Answer 2 · answered Apr 24 '19 at 08:01

1

Would this work?

var a = mystring ?? "0.0.0";

answered Apr 24 '19 at 08:01

Jon Roberts

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score 1 · Answer 3 · answered Apr 24 '19 at 08:21

1

I'll try to write many implementations:

var a = myString ?? "0.0.0";
var a = myString == null ? "0.0.0" : myString;
var a = myString is null ? "0.0.0" : myString;
var a = string.IsNullOrEmpty(myString) ? "0.0.0" : myString;

answered Apr 24 '19 at 08:21

Marco Salerno

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score -1 · Answer 4 · edited Apr 24 '19 at 18:29

-1

You can check the value by a IsNullOrEmpty() method on String class, and by a conditional operator (?) like the following code you can set your own custom text whenever your string is null.

var a = !String.IsnullOrEmpty(myString) ? myString : "0.0.0";

edited Apr 24 '19 at 18:29

Siavash

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answered Apr 24 '19 at 08:01

Shubham

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Why "!" when you can swap the parameters between ":" - `var a = myString == null ? "0.0.0" : myString;` – i486 Apr 24 '19 at 08:02

Is there a way to set a string to specific value if the string is null?

4 Answers4