AuthorizationResult.Allowed Field
[WCF RIA Services Version 1 Service Pack 2 is compatible with either .NET framework 4 or .NET Framework 4.5, and with either Silverlight 4 or Silverlight 5.]
Indicates the requested operation is allowed.
Namespace: System.ComponentModel.DataAnnotations
Assembly: System.ServiceModel.DomainServices.Server (in System.ServiceModel.DomainServices.Server.dll)
Syntax
'Declaration
Public Shared ReadOnly Allowed As AuthorizationResult
'Usage
Dim value As AuthorizationResult
value = AuthorizationResult.Allowed
public static readonly AuthorizationResult Allowed
public:
static initonly AuthorizationResult^ Allowed
static val Allowed: AuthorizationResult
public static final var Allowed : AuthorizationResult
Remarks
You use the Allowed property to represent a successful authorization request. Any instance of this class that is not nulla null reference (Nothing in Visual Basic) or not Allowed represents an authorization request that has been denied.
Examples
The following example shows an implementation of the AuthorizationAttribute that uses an AuthorizationContext value to customize authentication.
Public Class CheckAttendeeNameAttribute
Inherits System.Web.DomainServices.AuthorizationAttribute
Public Overrides Function Authorize(ByVal principal As System.Security.Principal.IPrincipal) As Boolean
If (principal.IsInRole("Attendee") And principal.Identity.Name.StartsWith("A")) Then
Return True
Else
Return False
End If
End Function
End Class
Public Class RestrictAccessToAssignedManagers
Inherits AuthorizationAttribute
Protected Overrides Function IsAuthorized(ByVal principal As System.Security.Principal.IPrincipal, ByVal authorizationContext As System.ComponentModel.DataAnnotations.AuthorizationContext) As System.ComponentModel.DataAnnotations.AuthorizationResult
Dim eph As EmployeePayHistory
Dim selectedEmployee As Employee
Dim authenticatedUser As Employee
eph = CType(authorizationContext.Instance, EmployeePayHistory)
Using context As New AdventureWorksEntities()
selectedEmployee = context.Employees.SingleOrDefault(Function(e) e.EmployeeID = eph.EmployeeID)
authenticatedUser = context.Employees.SingleOrDefault(Function(e) e.LoginID = principal.Identity.Name)
End Using
If (selectedEmployee.ManagerID = authenticatedUser.EmployeeID) Then
Return AuthorizationResult.Allowed
Else
Return New AuthorizationResult("Only the authenticated manager for the employee can add a new record.")
End If
End Function
End Class
public class CheckAttendeeNameAttribute : System.Web.DomainServices.AuthorizationAttribute
{
public override bool Authorize(System.Security.Principal.IPrincipal principal)
{
if (principal.IsInRole("Attendee") && principal.Identity.Name.StartsWith("A"))
{
return true;
}
else
{
return false;
}
}
}
public class RestrictAccessToAssignedManagers : AuthorizationAttribute
{
protected override AuthorizationResult IsAuthorized(System.Security.Principal.IPrincipal principal, AuthorizationContext authorizationContext)
{
EmployeePayHistory eph = (EmployeePayHistory)authorizationContext.Instance;
Employee selectedEmployee;
Employee authenticatedUser;
using (AdventureWorksEntities context = new AdventureWorksEntities())
{
selectedEmployee = context.Employees.SingleOrDefault(e => e.EmployeeID == eph.EmployeeID);
authenticatedUser = context.Employees.SingleOrDefault(e => e.LoginID == principal.Identity.Name);
}
if (selectedEmployee.ManagerID == authenticatedUser.EmployeeID)
{
return AuthorizationResult.Allowed;
}
else
{
return new AuthorizationResult("Only the authenticated manager for the employee can add a new record.");
}
}
}