Method must return multiple values

Question

Hii

I have a method in C #, I have to return multiple values ​​from this method using commands like arrays. Is there a reliable way?

Answer 1

Well, you could use:

• custom class / structure / type containing all your values
• out parameters

i.e:.

 class MyValues { public string Val1 { get; set; } public int Val2 {get; set; } } public MyValues ReturnMyValues(); 

or

 public void ReturnMyValues(out string Val1, out int Val2); 

Answer 2

Yes, the out keyword:

 public void ReturnManyInts(out int int1, out int int2, out int int3) { int1 = 10; int2 = 20; int3 = 30; } 

then name it like this:

 int i1, i2, i3; ReturnManyInts(out i1, out i2, out i3); Console.WriteLine(i1); Console.WriteLine(i2); Console.WriteLine(i3); 

which outputs:

 10 20 30 

EDIT:

I see that many posts suggest creating your own class for you. This is optional since .net provides you with a class to do what they say already. Class Tuple .

 public Tuple<int, string, char> ReturnMany() { return new Tuple<int, string, char>(1, "some string", 'B'); } 

then you can get it like this:

 var myTuple = ReturnMany(); myTuple.Item1 ... myTuple.Item2 ... 

There are general overloads, so you can have up to 8 unique types in your tuple.

Answer 3

If you are using .NET 4.0, you can use one of the generic Tuple to return multiple values ​​from a method call. The static Tuple class provides methods for creating Tuple objects. Therefore, you do not need to define your own return type for the method.

 public Tuple<string,int> Execute() { return new Tuple<string,int>("Hello World", 2); } 

Answer 4

Yes, it can create a new type that will contain several properties, and then return this type:

 public MyType MyMethod() { return new MyType { Prop1 = "foo", Prop2 = "bar" }; } 

Answer 5

Why is using "out" unreliable? (Or did you make a typo and mean without?)

There are several methods:

• Returns an object that contains multiple values ​​(structure / class, etc.)
• out
• ref

Answer 6

Descriptor class or structure. You should put it somewhere, since it is logical that the method should return only one value. Alternatively, you can use out or ref, but I would return a class.

Btw, what keeps you from using collections?

Answer 7

 public int Method Name(out string stringValue, out int intValue) { /// Method goes here /// return intVaraible } 

here you get 3 return values ​​1. stringValue 2. intValue 3. intVariable