ClientFormsAuthenticationMembershipProvider.ValidateUser Method (String, String, String)
Authenticates a user at the specified service URI by using the specified user name and password.
Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
Public Shared Function ValidateUser ( username As String, password As String, serviceUri As String ) As Boolean
Parameters
- username
-
Type:
System.String
The name of the user to authenticate.
- password
-
Type:
System.String
The password of the user to authenticate.
- serviceUri
-
Type:
System.String
The URI of the authentication service to use.
| Exception | Condition |
|---|---|
| WebException | The IsOffline property value is false and the membership provider is unable to access the authentication service. |
You can use client application services to validate users by using forms authentication. To validate users, you will typically call the static Membership.ValidateUser method, which internally calls the ClientFormsAuthenticationMembershipProvider.ValidateUser method. Alternatively, you can call the ClientFormsAuthenticationMembershipProvider.ValidateUser method directly. You can call this overload to access an authentication service at the location specified by the serviceUri parameter. Using this overload is an alternative to setting the ServiceUri property and calling the ValidateUser(String, String) overload.
The following example code demonstrates how to use this method to validate the user through an authentication service at a specified location. The user credentials are retrieved from login controls in your application code. This example requires a TextBox control named usernameTextBox and a TextBox control named passwordTextBox.
Private Function ValidateUsingServiceUri(ByVal serviceUri As String) As Boolean Dim isAuthorized As Boolean = False Try ' Call the Shared overload of ValidateUser. Specify credentials ' retrieved from login controls and the service location. isAuthorized = _ ClientFormsAuthenticationMembershipProvider.ValidateUser( _ usernameTextBox.Text, passwordTextBox.Text, serviceUri) Catch ex As System.Net.WebException MessageBox.Show("Unable to access the authentication service.", _ "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning) End Try If Not isAuthorized Then MessageBox.Show("Unable to authenticate.", "Not logged in", _ MessageBoxButtons.OK, MessageBoxIcon.Error) Application.Exit() End If Return isAuthorized End Function
Available since 3.5