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c#dynamic-variables
Moon
Moon

Reputation: 22565

Dynamic variable in C#?

Is it possible to use a dynamic variable (not sure about naming) in C#?

In PHP, I can do

$var_1 = "2";
$var_2 = "this is variable 2";

$test = ${"var_".$var_1};

echo $test;

output: this is variable 2;

Can we do this in C#?

Upvotes: 10

Views: 13381

Answers (5)

hej
hej

Reputation:

You are not looking for simple arrays?

string[] myArray = new string[2];

myArray[0] = "2";
myArray[1] = "this is variable 2"

Otherwhise dictionary is the way to go.

Upvotes: 1

João Silva
João Silva

Reputation: 91299

If your var is a class field, then you can use the static GetField method from class Type to obtain field information, such as its current value.

Upvotes: 1

Blindy
Blindy

Reputation: 67380

Not sure if this works with local variables (and most likely it doesn't since they're stored as indexes), but you could access class properties through reflection.

Upvotes: 1

Marc Gravell
Marc Gravell

Reputation: 1062780

No, basically. The compiler doesn't guarantee that method variables will exist (in their form as written), or with names...

If they were fields (instance or static), then you could use reflection to get the values; but not method variables. For what you want, perhaps use a dictionary as a substitute?

var vars = new Dictionary<string,object>();
vars["var_1"] = "2";
vars["var_2"] = "this is variable 2";

Console.WriteLine(vars["var_" + vars["var_1"]]);

Upvotes: 9

Martin v. L&#246;wis
Martin v. L&#246;wis

Reputation: 127457

In C#, you use dictionaries to associate values with strings.

Upvotes: 10

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