Dynamic variable in C#?

问题:

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#?

回答1:

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

回答2:

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"]]);

回答3:

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.

回答4:

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.

回答5:

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.