WebRequest.PreAuthenticate Property

Definition

Namespace:

System.Net

Assembly:

System.Net.Requests.dll

Source:

WebRequest.cs

When overridden in a descendant class, indicates whether to pre-authenticate the request.

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

Property Value

Boolean

true to pre-authenticate; otherwise, false.

Exceptions

NotImplementedException

Any attempt is made to get or set the property, when the property is not overridden in a descendant class.

Examples

The following example sets the PreAuthenticate property to true so that the NetworkCredential stored in the Credentials property will be sent to along with the resource request.

// 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()

Remarks

Caution

WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete, and you shouldn't use them for new development. Use HttpClient instead.

With the exception of the first request, the PreAuthenticate property indicates whether to send authentication information with subsequent requests without waiting to be challenged by the server. When PreAuthenticate is false, the WebRequest waits for an authentication challenge before sending authentication information.

Note

The WebRequest class is an abstract class. The actual behavior of WebRequest instances at run time is determined by the descendant class returned by the WebRequest.Create method. For more information about default values and exceptions, see the documentation for the descendant classes, such as HttpWebRequest and FileWebRequest.

See also

• PreAuthenticate