Uri.Authority Property (System)

.NET Framework Class Library

Uri..::.Authority Property

Gets the Domain Name System (DNS) host name or IP address and the port number for a server.

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

Syntax

Visual Basic (Declaration)

Public ReadOnly Property Authority As String

Visual Basic (Usage)

Dim instance As Uri
Dim value As String

value = instance.Authority

public string Authority { get; }

Visual C++

public:
property String^ Authority {
    String^ get ();
}

JScript

public function get Authority () : String

Property Value

Type: System..::.String
A String containing the authority component of the URI represented by this instance.

Exceptions

Exception	Condition
InvalidOperationException	This instance represents a relative URI, and this property is valid only for absolute URIs.

Remarks

The Authority property is typically a server DNS host name or IP address. This property might include the service port number if it differs from the default port for the URI. If the Authority component contains reserved characters, these are escaped in the string value returned by this property.

Examples

The following example writes the host name (www.contoso.com) and port number (8080) of the server to the console.

Visual Basic

Dim baseUri As New Uri("http://www.contoso.com:8080/")
Dim myUri As New Uri(baseUri,"shownew.htm?date=today")

Console.WriteLine(myUri.Authority)

Uri baseUri = new Uri("http://www.contoso.com:8080/");
Uri myUri = new Uri(baseUri,"shownew.htm?date=today");

Console.WriteLine(myUri.Authority);

Visual C++

Uri^ baseUri = gcnew Uri( "http://www.contoso.com:8080/" );
Uri^ myUri = gcnew Uri( baseUri,"shownew.htm?date=today" );
Console::WriteLine( myUri->Authority );

JScript

    var baseUri : Uri = new Uri("http://www.contoso.com:8080/");
    var myUri : Uri = new Uri(baseUri,"shownew.htm?date=today");
    Console.WriteLine(myUri.Authority);

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Reference

Uri Class

Uri Members

System Namespace