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.