HttpListenerPrefixCollection.Contains(String) Method

Definition

Namespace:
System.Net
Assembly:
System.Net.HttpListener.dll
Assembly:
System.dll
Assembly:
netstandard.dll

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

public:
 virtual bool Contains(System::String ^ uriPrefix);
public bool Contains (string uriPrefix);
abstract member Contains : string -> bool
override this.Contains : string -> bool
Public Function Contains (uriPrefix As String) As Boolean

Parameters

uriPrefix
String

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

Returns

Boolean

true if this collection contains the prefix specified by uriPrefix; otherwise, false.

Implements

Contains(T)

Exceptions

ArgumentNullException

uriPrefix is null.

Examples

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);
}

Public Shared Function CheckForPrefix(ByVal listener As HttpListener, ByVal prefix As String) As Boolean
    Dim prefixes As HttpListenerPrefixCollection = listener.Prefixes

    ' Get the prefixes that the Web server is listening to.
    If prefixes.Count = 0 OrElse prefix Is Nothing Then
        Return False
    End If

    Return prefixes.Contains(prefix)
End Function

Remarks

The specified prefix must exactly match an existing value.

Applies to

See also