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HttpListenerPrefixCollection.Contains Method

Returns a Boolean value that indicates whether the specified prefix is contained in the collection.

Namespace:  System.Net
Assembly:  System (in System.dll)

'Declaration
Public Function Contains ( _
	uriPrefix As String _
) As Boolean

Parameters

uriPrefix
Type: System.String

A String that contains the Uniform Resource Identifier (URI) prefix to test.

Return Value

Type: System.Boolean
true if this collection contains the prefix specified by uriPrefix; otherwise, false.

Implements

ICollection(Of T).Contains(T)

ExceptionCondition
ArgumentNullException

uriPrefix is Nothing.

The specified prefix must exactly match an existing value.

The following code example checks to see whether a user-specified prefix is contained in the prefix collection of an HttpListener.

public static bool CheckForPrefix(HttpListener listener, string prefix)
{
    // Get the prefixes that the Web server is listening to.
    HttpListenerPrefixCollection prefixes = listener.Prefixes;
    if (prefixes.Count == 0 || prefix == null)
    {
        return false;
    }
    return prefixes.Contains(prefix);
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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