Uri.CheckHostName(String) Method
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Determines whether the specified host name is a valid DNS name.
public:
static UriHostNameType CheckHostName(System::String ^ name);public static UriHostNameType CheckHostName(string name);public static UriHostNameType CheckHostName(string? name);static member CheckHostName : string -> UriHostNameTypePublic Shared Function CheckHostName (name As String) As UriHostNameType- name
- String
The host name to validate. This can be an IPv4 or IPv6 address or an Internet host name.
The type of the host name. If the type of the host name cannot be determined or if the host name is null or a zero-length string, this method returns Unknown.
The following example checks whether the host name is valid.
Console::WriteLine( Uri::CheckHostName( "www.contoso.com" ) );
Console.WriteLine(Uri.CheckHostName("www.contoso.com"));
printfn $"""{Uri.CheckHostName "www.contoso.com"}"""
Console.WriteLine(Uri.CheckHostName("www.contoso.com"))
The CheckHostName method checks that the host name provided meets the requirements for a valid Internet host name. It does not, however, perform a host-name lookup to verify the existence of the host.
| Produkt | Verzie |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 1.1, 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 | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
| UWP | 10.0 |
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