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Credentials Property

WebClient.Credentials Property

Gets or sets the network credentials that are sent to the host and used to authenticate the request.

Namespace:  System.Net
Assembly:  System (in System.dll)

'Declaration
Public Property Credentials As ICredentials

Property Value

Type: System.Net.ICredentials
An ICredentials containing the authentication credentials for the request. The default is Nothing.

The Credentials property contains the authentication credentials used to access a resource on a host. In most client-side scenarios, you should use the DefaultCredentials, which are the credentials of the currently logged on user. To do this, set the UseDefaultCredentials property to true instead of setting this property.

If the WebClient class is being used in a middle tier application, such as an ASP.NET application, the DefaultCredentials belong to the account running the ASP page (the server-side credentials). Typically, you would set this property to the credentials of the client on whose behalf the request is made.

The following code example uses the user's system credentials to authenticate a request.

Public Shared Sub Main()
    Try 
        Dim client As New WebClient()

        client.Credentials = CredentialCache.DefaultCredentials

        Dim pageData As [Byte]() = client.DownloadData("http://www.contoso.com")
        Dim pageHtml As String = Encoding.ASCII.GetString(pageData)

        Console.WriteLine(pageHtml)

    Catch webEx As WebException
        Console.Write(webEx.ToString())
    End Try 
End Sub

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
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