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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)

abstract Contains : 
        uriPrefix:string -> bool  
override Contains : 
        uriPrefix:string -> bool

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(T).Contains(T)

ExceptionCondition
ArgumentNullException

uriPrefix is a null reference (Nothing in Visual Basic).

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: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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