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WCF service


Create a WCF Service library project

1. Open Visual Studio, and Select File > New > Project

2. Select WCF Service Library template under Visual C# > WCF templates


3. Change the name to StudentServiceLibrary and click OK
4. Visual studio will add reference to System.ServiceModel and System.Runtime.Serialization and will add some files with sample code. 


5. Delete IService1.cs and Service1.cs





6. Add a new class called StudentService


Create the Data Contract 

7. Open StudentService.cs file that you created.

8. Add using System.ServiceModel;

9. Add using System.Runtime.Serialization;

10. Add the following code in the StudentService.cs class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.Threading.Tasks;

namespace StudentServiceLibrary
{
    [DataContract]
    public class StudentInfo
    {
        [DataMember]
        public string StuId { get; set; }
        [DataMember]
        public string FirstName { get; set; }
        [DataMember]
        public string LastName { get; set; }
        [DataMember]
        public string Email { get; set; }
    }

    class StudentService
    {
    }
}

Create the Service Contract 

11. Add the following code in the ProductService.cs class
    [ServiceContract]
    public interface IStudentService
    {
        [OperationContract]
        void AddStudent(Student stu);

        [OperationContract]
        IEnumerable<Student> ListAllStudents();

        [OperationContract]
        Student ListStudentById(string code);

    }

Service Implementation

12. Add the following code in the ProductService.cs class
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
    public class StudentService : IStudentService
    {
        Dictionary<string, Student> Students = new Dictionary<string, Student>();

        void IStudentService.AddStudent(Student stu)
        {
            Students.Add(stu.StuId, stu);
        }

        IEnumerable<Student> IStudentService.ListAllStudents()
        {
            return Students.Values;
        }

        Student IStudentService.ListStudentById(string stuId)
        {
            return Students[stuId];
        }

    }

Service endpoints 

13. Updated the name of the service in App.config as given below:
          <service name="StudentServiceLibrary.StudentService">
14. Updated the contract in the endpoint of the service in App.config as given below:
<endpoint address="" binding="basicHttpBinding" contract="StudentServiceLibrary.IStudentService">

Test Service 

15. Run the Service.


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