Uri.CheckSchemeName(String) Uri.CheckSchemeName(String) Uri.CheckSchemeName(String) Uri.CheckSchemeName(String) Method

Definition

Determines whether the specified scheme name is valid.

public:
 static bool CheckSchemeName(System::String ^ schemeName);
public static bool CheckSchemeName (string schemeName);
static member CheckSchemeName : string -> bool
Public Shared Function CheckSchemeName (schemeName As String) As Boolean

Parameters

schemeName
String String String String

The scheme name to validate.

Returns

A Boolean value that is true if the scheme name is valid; otherwise, false.

Examples

The following example creates a Uri instance and checks whether the scheme name is valid.

Uri^ address1 = gcnew Uri( "http://www.contoso.com/index.htm#search" );
Console::WriteLine( "address 1 {0} a valid scheme name",
   Uri::CheckSchemeName( address1->Scheme ) ? (String^)" has" : " does not have" );
if ( address1->Scheme == Uri::UriSchemeHttp )
{
   Console::WriteLine( "Uri is HTTP type" );
}

Console::WriteLine( address1->HostNameType );
Uri address1 = new Uri("http://www.contoso.com/index.htm#search");
Console.WriteLine("address 1 {0} a valid scheme name",
      Uri.CheckSchemeName(address1.Scheme) ? " has" : " does not have");

if (address1.Scheme == Uri.UriSchemeHttp)
    Console.WriteLine("Uri is HTTP type");
      
Console.WriteLine(address1.HostNameType);
Dim address1 As New Uri("http://www.contoso.com/index.htm#search")
Console.WriteLine("address 1 {0} a valid scheme name", IIf(Uri.CheckSchemeName(address1.Scheme), " has", " does not have")) 'TODO: For performance reasons this should be changed to nested IF statements

If address1.Scheme = Uri.UriSchemeHttp Then
    Console.WriteLine("Uri is HTTP type")
End If 
Console.WriteLine(address1.HostNameType)

Remarks

This method checks the scheme name for validity according to RFC 2396 by default. If International Resource Identifiers (IRIs) or Internationalized Domain Name (IDN) parsing is enabled, this method checks the scheme name for validity according to RFC 3986. The scheme name must begin with a letter and must contain only letters, digits, and the characters ".", "+", or "-".

For more information on IRI support, see the Remarks section for the Uri class.

Applies to