Array.Contains

ASPnoob

Hello all, I've read that in dotnet framework 3.5 and above one can use the keyword Contains to check if an array has a particular value in one of it's elements. How do I check if an array contains a particular value in earlier versions of dotnet frameworks using C#? Thanks in advance.

n podbielski

linq method:

list.Contains(value);

http://msdn.microsoft.com/en-us/library/system.linq.enumerable.contains.aspx[^]

No more Mister Nice Guy... >: |

Lost User

Iterate through the array and do a match yourself:

for(int i=0; i < myArray.Length; i++) {
if (myArray[i] == valueToCheck) {
//Take action
break;
}
}

ASPnoob

Hi, thanks for replying. That is exactly what I'm looking for.

Lost User

Glad to be of help. Mark it as answer if that helped.

KiranKumar Roy

Dear, You can use below function to check if Value exist in array or not..

Function CheckIfValueExistInArray(ByVal strString As String) As Boolean
    Dim animals() As String = {"lion", "turtle", "ostrich"}
    If Array.IndexOf(animals, strString) <> -1 Then
        'if exist will then retrun True
        Return True
    Else
        'if does't exist then will retrun False
        Return False
    End If
End Function

Thanks

KiranKumar Roy

DaveyM69

KiranKumar Roy wrote:

You can use below function to check if Value exist in array or not

Not really. This is the C# forum, you have posted VB code. You are checking for a string, the OP could be searching for any type of data. You are searching an array that is created inside the method, typically he would be searching a class level variable or passing an array to a static method. Array.IndexOf or Array.IndexOf<T> are a good call though, but no need to wrap in another method. If you really want a separate method then extensions such as these would be better IMO:

public static class Extensions
{
public static bool Contains(this object[] array, object value)
{
bool result = false;
if (array != null)
result = Array.IndexOf(array, value) > -1;
return result;
}
public static bool Contains(this T[] array, T value)
{
bool result = false;
if (array != null)
result = Array.IndexOf(array, value) > -1;
return result;
}
}

Dave
Binging is like googling, it just feels dirtier. Please take your VB.NET out of our nice case sensitive forum. Astonish us. Be exceptional. (Pete O'Hanlon)
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

KiranKumar Roy

I am really very sorry for posting VB code in C# forum.. I just want to give idea to ASPnoob, So he can apply according logic in his code. I will keep in mind that i will not post VB Code in C# form. Thanks.

KiranKumar Roy

BobJanova

if(0 <= Array.IndexOf(array, element)){ ... }