While working with WCF Windows Communication Foundation we create function that performs some task, for doing that we made operation contract.

If we look into operation contract area where there are many parameters that the developer or user needs to take care of while writing codes, for example:

       [OperationContract]
        [WebInvoke(Method = "GET", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json,
        BodyStyle = WebMessageBodyStyle.Bare,
        UriTemplate = "GetRoles")]
        JobRoleResponse GetJobRoles();

Here is my operation contract which contains the GetJobRoles method and with this method there are certain parameters associated.

Lets discuss it one by one

First the Type of the Method it could be Get or it could be POST .Get i have already made this is POST

      [OperationContract]
        [WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json,
        BodyStyle = WebMessageBodyStyle.Bare,
        UriTemplate = "SaveNudge")]
        NudgeDetailsResponse SaveNudgeForFriend(NudgeDetailsRequest nudgeRequest);

In Get we have our sensitive information stored into the the cache and cookies

We also have our information gets shared into the URL which is not good for us if we have sensitive data into it.

If we talk about POST the cache and cookies of the browser is disabled so no sensitive information gets stored anywhere 

We dont have any information to gets shared onto the URL so data is safe

Request Format is the way by which the request is made by the client or the User . This could be in two types either in XML or either in JSON

Response Format is the way by which the response is provided to the User . This could be in two types either in XML or either in JSON

Lets talk about the BodyStyle

[ServiceContract]
public interface IService
{
    ...
    [OperationContract]
    [WebInvoke(Method = "POST",
        ResponseFormat = WebMessageFormat.Json,
        RequestFormat = WebMessageFormat.Json,
        BodyStyle = WebMessageBodyStyle.Wrapped)]
    Entity DoWork(Entity entity);
    ...
}

[DataContract]
public class Entity
{
    [DataMember]
    public string Name;

    [DataMember]
    public string Value;
}

The style could be in Bare or in Wrapped lets see the difference between these two for JSON

JSON and WebMessageBodyStyle.Bare request and response will be:

Request:

{"Name":"name","Value":"value"}

Response:

{"Name":"ResultName:name","Value":"ResultValue:value"}

JSON and WebMessageBodyStyle.Wrapped request and response will be:

Request:

{"entity":{"Name":"name","Value":"value"}}

Response:

{"DoWorkResult":{"Name":"name","Value":"value"}}

URI Template is the name by which the service will be invoked by the client or by the user