WebRequest.PreAuthenticate Properti

Definisi

Ruang nama:

System.Net

Rakitan:

System.Net.Requests.dll

Sumber:

WebRequest.cs

Saat ditimpa di kelas turunan, menunjukkan apakah akan melakukan pra-autentikasi permintaan.

public:
 virtual property bool PreAuthenticate { bool get(); void set(bool value); };

public virtual bool PreAuthenticate { get; set; }

member this.PreAuthenticate : bool with get, set

Public Overridable Property PreAuthenticate As Boolean

Nilai Properti

Boolean

true untuk melakukan pra-autentikasi; jika tidak, false.

Pengecualian

NotImplementedException

Setiap upaya dilakukan untuk mendapatkan atau mengatur properti, ketika properti tidak ditimpa di kelas turunan.

Contoh

Contoh berikut mengatur PreAuthenticate properti ke true sehingga NetworkCredential yang disimpan di Credentials properti akan dikirim bersama dengan permintaan sumber daya.

// Create a new webrequest to the mentioned URL.
WebRequest^ myWebRequest = WebRequest::Create( url );

// Set 'Preauthenticate' property to true. Credentials will be sent with the request.
myWebRequest->PreAuthenticate = true;

Console::WriteLine( "\nPlease enter your credentials for the requested Url" );
Console::WriteLine( "UserName" );
String^ UserName = Console::ReadLine();
Console::WriteLine( "Password" );
String^ Password = Console::ReadLine();

// Create a New 'NetworkCredential' object.
NetworkCredential^ networkCredential = gcnew NetworkCredential( UserName,Password );

// Associate the 'NetworkCredential' object with the 'WebRequest' object.
myWebRequest->Credentials = networkCredential;

// Assign the response object of 'WebRequest' to a 'WebResponse' variable.
WebResponse^ myWebResponse = myWebRequest->GetResponse();

// Create a new webrequest to the mentioned URL.
WebRequest myWebRequest=WebRequest.Create(url);

// Set 'Preauthenticate'  property to true.  Credentials will be sent with the request.
myWebRequest.PreAuthenticate=true;

Console.WriteLine("\nPlease enter your credentials for the requested Url");
Console.WriteLine("UserName");
string UserName=Console.ReadLine();
Console.WriteLine("Password");
string Password=Console.ReadLine();

// Create a New 'NetworkCredential' object.
NetworkCredential networkCredential=new NetworkCredential(UserName,Password);

// Associate the 'NetworkCredential' object with the 'WebRequest' object.
myWebRequest.Credentials=networkCredential;

// Assign the response object of 'WebRequest' to a 'WebResponse' variable.
WebResponse myWebResponse=myWebRequest.GetResponse();

' Create a new webrequest to the mentioned URL.
Dim myWebRequest As WebRequest = WebRequest.Create(url)

' Set 'Preauthenticate'  property to true.
myWebRequest.PreAuthenticate = True
Console.WriteLine(ControlChars.Cr + "Please enter your credentials for the requested Url")
Console.WriteLine("UserName")
Dim UserName As String = Console.ReadLine()
Console.WriteLine("Password")
Dim Password As String = Console.ReadLine()

' Create a New 'NetworkCredential' object.
Dim networkCredential As New NetworkCredential(UserName, Password)

' Associate the 'NetworkCredential' object with the 'WebRequest' object.
myWebRequest.Credentials = networkCredential

' Assign the response object of 'WebRequest' to a 'WebResponse' variable.
Dim myWebResponse As WebResponse = myWebRequest.GetResponse()

Keterangan

Dengan pengecualian permintaan pertama, PreAuthenticate properti menunjukkan apakah akan mengirim informasi autentikasi dengan permintaan berikutnya tanpa menunggu untuk ditantang oleh server. Kapan PreAuthenticate adalah false, WebRequest menunggu tantangan autentikasi sebelum mengirim informasi autentikasi.

Catatan

Kelasnya WebRequest adalah abstract kelas. Perilaku WebRequest aktual instans pada durasi ditentukan oleh kelas turunan yang dikembalikan oleh WebRequest.Create metode . Untuk informasi selengkapnya tentang nilai dan pengecualian default, lihat dokumentasi untuk kelas turunan, seperti HttpWebRequest dan FileWebRequest.

Lihat juga

• PreAuthenticate