CODEWITHSUNDEEP
c#asp.net-mvc-3
user1031034
user1031034

Reputation: 856

Display a number in text

I have function where I want display a number in text.

if (all > 120)
{
     int w_m = 120 - il_os;
     string text = "free room: {0}", w_m;
     ModelState.AddModelError("", text);
}

but I have a error:

Error 1 A local variable named 'w_m' is already defined in this scope

how display number with text in ModelState.AddModelError?

Upvotes: 1

Views: 486

Answers (5)

JaredPar
JaredPar

Reputation: 754565

You need to use String.Format in order to format strings in that manner

string text = String.Format("free room: {0}", w_m);

Doing this will also remove the error you're seeing because the current syntax you're using is causing w_m to be redeclared as a string local.

Upvotes: 3

Lukazoid
Lukazoid

Reputation: 19416

use String.Format which will be used like this:

string text = String.Format("free room: {0}", w_m);

Edit: Beaten to it, Should have known finding the MSDN link would cost me those precious seconds.

Upvotes: 0

Ry-
Ry-

Reputation: 224857

You're missing a function there:

string text = string.Format("free room: {0}", w_m);

Placeholders in strings isn't a language feature! Right now you're declaring the variable w_m again, as a string. That is a feature:

int a, b, c;

Upvotes: 3

escargot agile
escargot agile

Reputation: 22379

 string text = string.Format("free room: {0}", w_m);

In your code the compiler thinks that w_m is another declaration, as in:

 string a, b;

Upvotes: 0

user596075
user596075

Reputation:

Your error has nothing to do with displaying a number in text. You are declaring a variable (w_m) that is already in that scope.

w_m must be declared prior to your if clause. If you are looking to reuse your w_m variable, then change the above line to:

 w_m = 120 - il_os;

As for putting that number in your string, you can do a couple of things:

string text = "free room: " + w_m.ToString();

Or

string text = string.Format("free room: {0}", w_m);

Upvotes: 0

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