CODEWITHSUNDEEP
c#.net.net-2.0
Daniel Peñalba
Daniel Peñalba

Reputation: 31887

How to convert IList<string> to a string[] without using Linq

I'm not sure what is the best way to convert an IList<string> (IList does not implement the ToArray property) to an string[] array.

I cannot use Linq because I'm compiling with .NET 2.0. Any ideas will be wellcome.

Upvotes: 7

Views: 12869

Answers (5)

jsirr13
jsirr13

Reputation: 1002

If you are forced to have IList, then to get an array...

IList list; 
var array = new List<string>(list).ToArray()

Upvotes: 4

4b0
4b0

Reputation: 22323

try: 

 public static T[] ToArray<T>(this IList<T> list)  
    {  
        if (list is Array) return (T[]) list;  

        T[] retval = new T[list.Count];  
        for (int i = 0; i < retval.Length; i++)   
            retval[i] = list[i];  

        return retval;  
    }

Its only a rough .May be its help.

Upvotes: 1

Stealth Rabbi
Stealth Rabbi

Reputation: 10346

ToArray is an extension method of IEnumerable, and IList implement IEnumerable. You can do it if you import that.

Upvotes: 3

jason
jason

Reputation: 241711

Use ICollection<T>.CopyTo:

string[] strings = new string[list.Count];
list.CopyTo(strings, 0);

I'm not quite sure if I understand the no-LINQ restriction though? It sounds like you would use ToArray if IList<T> had it. But it turns out it does because IEnumerable<T>.ToArray is an extension method defined on IEnumerable<T> of which IList<T> implements. So why don't you just use that?

Upvotes: 27

kemiller2002
kemiller2002

Reputation: 115528

One way or another, you are going to have to create an array and fill the contents of it with what is in the list. This is the most straight forward way of doing it.

var arr = new string[Your_List.Count]

for(var ii = 0; ii < arr.Length; ii++){
   arr[ii] = Your_List[ii];

}

Upvotes: 1

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