OperationContract attributes/properties of the WCF in .net framework 4.0

OperationContract attributes/properties

1.      Action:

2.      AsycnPattern:

3.      IsInitiating:If we are using this attribute the SessionMode attribute of the ServiceContract 

      should be defined.It has two modes

a.      True:It is default mode .If IsInitiating property is true then that method can be 

called at the beginning.

b.      False: If IsInitiating property is false then that method cannot be called at the 

beginning.

4.      IsTerminating: If we are using this attribute the SessionMode attribute of the 

      ServiceContract should be defined.It has two modes

a.      True:If IsTerminating property is true then session will end after implementation 

of that method.

b.      False: IsTerminating property is true then session will not end after implementation 

of that method.

5.      Name: This is used to provide the name to the method by which client will call it.

6.      ProtectionLevel:It is System.Net.Security.ProtectionLevel which defines the protection 

      level of the service contract. It has three modes.

a.      EncryptAndSign: It ensures that data will be encrypted & signed before it 

is transmitted.

b.      None: Data will not be signed nor encrypted & it is transmitted as it is.

c.       Sign: Data will only signed before it is transmitted.

7.      ReplyAction:

8.      IsOneWay:It has two modes 

a.      True: It specifies that the method will not return anything. Method’s return type 

should be “void” if IsOnwWay is true.

b.      False: It is default value for the OperationContract. No need to specify this if 

method returns anything. 

Service Contract (ServiceContract) Attributes/properties of WCF in framework 4.0

ServiceContract has about 6 properties/attributes.

Service Contract Attributes

1.      CallbackContract:

2.      ConfigurationName:

3.      Name: This is used to provide the name to the service contract by which client will call it.

4.      Namespace: The namespace property is really an XML term. It allows you to maintain uniqueness with elements. So you can have multiple elements of the same tag name but they are completely different as long as they have different namespaces.

5.      ProtectionLevel: it is System.Net.Security.ProtectionLevel which defines the protection level of 

       the service contract. It has three modes.

a.      EncryptAndSign: It ensures that data will be encrypted & signed before it is transmitted.

b.      None: Data will not be signed nor encrypted & it is transmitted as it is.

c.       Sign: Data will only signed before it is transmitted.

6.      SessionMode: It Specifies that whether service contracts supports session or not.

      It has three modes

a.       Allowed: It specifies that if incoming binding supports session then it supports the session.

b.      NotAllowed: It specifies that contract will never support session & the never support 

the binding that initiates the session.

c.       Required: It specifies that contract needs session & exception is thrown if binding do not support the session.