RoleService.SelectingProvider Event

Definition

Namespace:

System.Web.ApplicationServices

Assembly:

System.Web.Extensions.dll

Occurs when a RoleService instance determines which role provider to use for checking the user's roles.

public:
 static event EventHandler<System::Web::ApplicationServices::SelectingProviderEventArgs ^> ^ SelectingProvider;

public static event EventHandler<System.Web.ApplicationServices.SelectingProviderEventArgs> SelectingProvider;

member this.SelectingProvider : EventHandler<System.Web.ApplicationServices.SelectingProviderEventArgs> 

Public Shared Custom Event SelectingProvider As EventHandler(Of SelectingProviderEventArgs) 

Event Type

EventHandler<SelectingProviderEventArgs>

Examples

The following example shows how to bind an event handler to the SelectingProvider event in the Global.asax file. The event handler determines at run time which role provider to use, based on the user name.

void Application_Start(object sender, EventArgs e) 
{
    System.Web.ApplicationServices.RoleService.SelectingProvider += 
        new EventHandler<System.Web.ApplicationServices.SelectingProviderEventArgs>(RoleService_SelectingProvider);
}

void RoleService_SelectingProvider
    (object sender, System.Web.ApplicationServices.SelectingProviderEventArgs e)
{
    if (e.User.Identity.Name.IndexOf("@example.com") > 0)
    {
        e.ProviderName = "EmployeeRoleProvider";
    }
    else
    {
        e.ProviderName = "CustomerRoleProvider";
    }
}

Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
    AddHandler System.Web.ApplicationServices.RoleService.SelectingProvider, _
        AddressOf Me.RoleService_SelectingProvider
End Sub

Sub RoleService_SelectingProvider _
(ByVal sender As Object, _
 ByVal e As System.Web.ApplicationServices.SelectingProviderEventArgs)

    If (e.User.Identity.Name.IndexOf("@example.com") > 0) Then
        e.ProviderName = "EmployeeRoleProvider"
    Else
        e.ProviderName = "CustomerRoleProvider"
    End If
End Sub

Remarks

The RoleService class raises the SelectingProvider event when it determines which role provider to use in order to retrieve the user's roles. You can create an event handler for the SelectingProvider event to select at run time which role provider to use.

See also

• SelectingProviderEventArgs