ImpersonationOption Enum

Definition

Namespace:

System.ServiceModel

Assembly:

System.ServiceModel.dll

Specifies the impersonation behavior for a service operation on a service instance.

public enum class ImpersonationOption

public enum ImpersonationOption

type ImpersonationOption = 

Public Enum ImpersonationOption

Inheritance

Object

ValueType

Enum

ImpersonationOption

Fields

Name	Value	Description
NotAllowed	0	Impersonation is not performed. If ImpersonateCallerForAllOperations is equal to true, a validation exception occurs at service startup time.
Allowed	1	Impersonation is performed if credentials are available and ImpersonateCallerForAllOperations is equal to true.
Required	2	Impersonation is required.

Examples

The following code example on the service shows how to have a method impersonate the caller by using the OperationBehaviorAttribute to set the impersonation level.

[OperationBehavior(Impersonation = ImpersonationOption.Required)]
public double Add(double n1, double n2)
{
    double result = n1 + n2;
    Console.WriteLine("Received Add({0},{1})", n1, n2);
    Console.WriteLine("Return: {0}", result);
    DisplayIdentityInformation();
    return result;
}

<OperationBehavior(Impersonation := ImpersonationOption.Required)> _
Public Function Add(ByVal n1 As Double, ByVal n2 As Double) As Double Implements ICalculator.Add
    Dim result = n1 + n2
    Console.WriteLine("Received Add({0},{1})", n1, n2)
    Console.WriteLine("Return: {0}", result)
    DisplayIdentityInformation()
    Return result
End Function

Remarks

Use the ImpersonationOption enumeration to control impersonation in Windows Communication Foundation (WCF) applications.

This setting interacts with a configuration property on ImpersonateCallerForAllOperations in the following table.