HttpListenerPrefixCollection.Contains Method (String)

 
System_CAPS_noteNote

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

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

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.

Exception Condition
ArgumentNullException

uriPrefix is null.

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
Available since 2.0
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