string array.Contains?

Question

.NET 2

string[] myStrings = GetMyStrings();    
string test = \"testValue\";

How can I verify if myStrings contains test

Answer 1

I have found an elegant answer at the page here http://www.dotnettoad.com/index.php?/archives/10-Array.Contains.html. What you have to do in .NET 2.0 is to cast to IList and call Contains method.

(IList<string> mystrings).Contains(test);

Answer 2

How about this:

Sub Main
    Dim myStrings(4) As String
    myStrings(0) = "String 1"
    myStrings(1) = "String 2"
    myStrings(2) = "testValue"
    myStrings(3) = "String 3"
    myStrings(4) = "String 4"

    Dim test As String = "testValue"

    Dim isFound As Boolean = Array.IndexOf(myStrings, test) >= 0

    If isFound Then
        Console.WriteLine("Found it!")
    End If
End Sub

This should work for .Net 2.0 and VB.Net.

Answer 3

bool ContainsString(string[] arr, string testval)
{
    if ( arr == null )
        return false;
    for ( int i = arr.Length-1; i >= 0; i-- )
        if ( arr[i] == testval )
            return true;
    return false;
}

And this will have the best performance ever. :P

Answer 4

Here is almost the exact same question on msdn. Find String in String Array As others have said you really have two options: 1) Use a list for easier checking 2) Loop through your array to find the string

Answer 5

you can use Array.BinarySearch as described below.

 string[] strArray = GetStringArray();
        string strToSearch ="test";
        Array.BinarySearch(strArray, strToSearch);

Answer 6

Instead of using a static array, you could use a List:

List<string> myStrings = new List<string>(GetMyStrings());
if(myStrings.Contains("testValue"))
{
    // Do Work
}