HttpListenerPrefixCollection.Contains(String) Method

Reference

Definition

Namespace:: System.Net

Assemblies:: netstandard.dll, System.Net.HttpListener.dll

Assembly:: System.Net.HttpListener.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Source:: HttpListenerPrefixCollection.cs

Source:: HttpListenerPrefixCollection.cs

Source:: HttpListenerPrefixCollection.cs

Important

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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

Termék	Verziók
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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