AspNetCompatibilityRequirementsMode Enumeration
Specifies whether a Windows Communication Foundation (WCF) service runs, or can run, in a mode that is compatible with ASP.NET.
Assembly: System.ServiceModel (in System.ServiceModel.dll)
| Member name | Description | |
|---|---|---|
| NotAllowed | WCF services must run in an application domain with ASP.NET compatibility mode set to false. | |
| Allowed | WCF services can run in an application domain with ASP.NET compatibility mode set to true or false. | |
| Required | WCF services must run in an application domain with ASP.NET compatibility mode set to true. |
ASP.NET compatibility mode allows WCF services to use ASP features such as identity impersonation. It is enabled at the application level through the Web.config file and cannot be overridden by Web.config files nested in the application. When the AspNetCompatibilityRequirementsMode value is not specified for a service, it gets NotAllowed behavior by default. For more information, see serviceHostingEnvironment.
Service developers must explicitly opt-in for the ASP.NET compatibility mode when implementing the WCF service by setting the RequirementsMode property on the AspNetCompatibilityRequirementsAttribute as shown in the following example:
<ServiceContract(Namespace:="http://Microsoft.ServiceModel.Samples")> _ Public Interface ICalculatorSession <OperationContract()> _ Sub Clear() <OperationContract()> _ Sub AddTo(ByVal n As Double) <OperationContract()> _ Sub SubtractFrom(ByVal n As Double) <OperationContract()> _ Sub MultiplyBy(ByVal n As Double) <OperationContract()> _ Sub DivideBy(ByVal n As Double) <OperationContract()> _ Function Equal() As Double End Interface
<AspNetCompatibilityRequirements(RequirementsMode:=AspNetCompatibilityRequirementsMode.Required)> _
Public Class CalculatorService
Implements ICalculatorSession
Property Result() As Double
' Store result in AspNet Session.
Get
If (HttpContext.Current.Session("Result") Is Nothing) Then
Return 0D
End If
Return HttpContext.Current.Session("Result")
End Get
Set(ByVal value As Double)
HttpContext.Current.Session("Result") = value
End Set
End Property
Public Sub Clear() _
Implements ICalculatorSession.Clear
Result = 0D
End Sub
Public Sub AddTo(ByVal n As Double) _
Implements ICalculatorSession.AddTo
Result += n
End Sub
Public Sub SubtractFrom(ByVal n As Double) _
Implements ICalculatorSession.SubtractFrom
Result -= n
End Sub
Public Sub MultiplyBy(ByVal n As Double) _
Implements ICalculatorSession.MultiplyBy
Result *= n
End Sub
Public Sub DivideBy(ByVal n As Double) _
Implements ICalculatorSession.DivideBy
Result /= n
End Sub
Public Function Equal() As Double _
Implements ICalculatorSession.Equal
Return Result
End Function
End Class
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.