WebHeaderCollection.GetKey(Int32) Metode

Definisi

Ruang nama:

System.Net

Rakitan:

netstandard.dll, System.Net.WebHeaderCollection.dll

Sumber:

WebHeaderCollection.cs

Mendapatkan nama header pada posisi yang ditentukan dalam koleksi.

public:
 override System::String ^ GetKey(int index);

public override string GetKey(int index);

override this.GetKey : int -> string

Public Overrides Function GetKey (index As Integer) As String

Parameter

index

Int32

Indeks berbasis nol dari kunci yang akan didapatkan dari koleksi.

Mengembalikan

String

Yang String memegang nama header.

Pengecualian

ArgumentOutOfRangeException

index negatif.

-atau-

index melebihi ukuran koleksi.

Contoh

Contoh kode berikut menggunakan GetKey untuk mendapatkan nama header dalam WebHeaderCollection.

if (args.Length == 0)
{
    Console.WriteLine("must specify a URL!");
    return;
}
string server = args[0];

// Create the web request 
HttpWebRequest myHttpWebRequest = 
    (HttpWebRequest) WebRequest.Create(server);
myHttpWebRequest.Timeout = 1000;
// Get the associated response for the above request.
HttpWebResponse myHttpWebResponse = 
    (HttpWebResponse) myHttpWebRequest.GetResponse();

// Get the headers associated with the response.
WebHeaderCollection myWebHeaderCollection = 
    myHttpWebResponse.Headers;

for(int i = 0; i < myWebHeaderCollection.Count; i++)
{
    String header = myWebHeaderCollection.GetKey(i);
    String[] values = 
        myWebHeaderCollection.GetValues(header);
    if(values.Length > 0) 
    {
        Console.WriteLine("The values of {0} header are : "
                         , header);
        for(int j = 0; j < values.Length; j++) 
            Console.WriteLine("\t{0}", values[j]);
    }
    else
        Console.WriteLine("There is no value associated" +
            "with the header");
}
Console.WriteLine("");

// Get the headers again, using new properties (Keys, 
// AllKeys, Clear) and methods (Get and GetKey)

string[] headers = myWebHeaderCollection.AllKeys;

// enumerate through the header collection.
foreach (string s in headers)
{
    Console.WriteLine("Header {0}, value {1}",
        s,
        myWebHeaderCollection.Get(s) );
}

Console.WriteLine("");

// show the use of Get(Int32) and GetValue(Int32)
if (myWebHeaderCollection.Count > 0)
{
    // get the name and value of the first header
    int index=0;
    Console.WriteLine("Header {0}: name {1}, value {2}",
        index, 
        myWebHeaderCollection.GetKey(index),
        myWebHeaderCollection.Get(index));
}

myWebHeaderCollection.Clear();

myHttpWebResponse.Close();