In this article we are going to see how to create a sample web api and self host it for this first create a Console Application , then using Nuget package manager install the following one
- Microsoft.AspNet.WebApi.SelfHost
Then Start to build the application, in our example we can take the Employees as sample.
Api Controller:
******************
public class Employee
{
public string Name { set; get; }
public int Age { set; get; }
}
public class EmployeeController:ApiController
{
private static readonly IEmployeeRepository emp = new EmployeeRepository();
public IEnumerable<Employee> Get()
{
return emp.GetAllEmployee();
}
public Employee Get(string name)
{
return emp.GetAllEmployee().Where(x => x.Name == name).FirstOrDefault();
}
[ActionName("PostEmployee1")]
[HttpPost]
public int Emp(string name,int age)
{
emp.GetAllEmployee().Add(new Employee() {Name=name ,Age=age});
return emp.GetAllEmployee().Count;
}
[ActionName("PostEmployee2")]
[HttpPost]
public int PostEmployee([FromBody]Employee empl)
{
emp.GetAllEmployee().Add(new Employee() { Name = empl.Name, Age = empl.Age });
return emp.GetAllEmployee().Count;
}
}
Repository:
interface IEmployeeRepository
{
List<Employee> GetAllEmployee();
}
public class EmployeeRepository:IEmployeeRepository
{
List<Employee> employees = new List<Employee>() { new Employee() {Name="Ram",Age=34},new Employee(){Name="Kumar",Age=30}};
public List<Employee> GetAllEmployee()
{
return employees;
}
}
Assembly Resolver:
******************
public class EmpAssemblyResolver:IAssembliesResolver
{
private string path;
public EmpAssemblyResolver(string assempath)
{
this.path = assempath;
}
public ICollection<System.Reflection.Assembly> GetAssemblies()
{
List<Assembly> assemblies= new List<Assembly>();
assemblies.Add(Assembly.LoadFrom(path));
return assemblies;
}
}
Hosting :
Uri _baseaddress = new Uri("http://localhost:8070/");
var assemloc = Assembly.GetExecutingAssembly().Location;
string assempath = assemloc.Substring(0, assemloc.LastIndexOf("\\")) + @"\WebApiSamples.exe";
HttpSelfHostConfiguration config = new HttpSelfHostConfiguration(_baseaddress);
config.Services.Replace(typeof(IAssembliesResolver), new EmpAssemblyResolver(assempath));
config.Routes.MapHttpRoute(name: "DefaultApi", routeTemplate: "api/{controller}/{action}/{id}", defaults: new { id = RouteParameter.Optional });
using (HttpSelfHostServer hostserver = new HttpSelfHostServer(config))
{
Console.WriteLine("Waiting ....");
hostserver.OpenAsync().Wait();
GetEmployees();
PostEmployeeinUrl();
Console.WriteLine();
Console.Read();
}
Main Program:
class Program
{
static void Main(string[] args)
{
Uri _baseaddress = new Uri("http://localhost:8070/");
var assemloc = Assembly.GetExecutingAssembly().Location;
string assempath = assemloc.Substring(0, assemloc.LastIndexOf("\\")) + @"\WebApiSamples.exe";
HttpSelfHostConfiguration config = new HttpSelfHostConfiguration(_baseaddress);
config.Services.Replace(typeof(IAssembliesResolver), new EmpAssemblyResolver(assempath));
config.Routes.MapHttpRoute(name: "DefaultApi", routeTemplate: "api/{controller}/{action}/{id}", defaults: new { id = RouteParameter.Optional });
using (HttpSelfHostServer hostserver = new HttpSelfHostServer(config))
{
Console.WriteLine("Waiting ....");
hostserver.OpenAsync().Wait();
GetEmployees();
PostEmployeeinUrl();
Console.WriteLine();
Console.Read();
}
}
private static async void GetEmployees()
{
try
{
HttpClient client = new HttpClient();
HttpResponseMessage res = await client.GetAsync(new Uri("http://localhost:8070/api/Employee/Get"));
res.EnsureSuccessStatusCode();
string successmess = await res.Content.ReadAsStringAsync();
var empl = Newtonsoft.Json.JsonConvert.DeserializeObject<List<Employee>>(successmess);
Console.WriteLine("Employee Count "+ empl.Count);
foreach (Employee e in empl)
{
Console.WriteLine("Name "+e.Name+", Age : "+e.Age);
}
}
catch (Exception ex)
{
}
}
private static async void PostEmployeeinUrl()
{
try
{
Console.WriteLine("");
HttpClient client = new HttpClient();
var postdat = new List<KeyValuePair<string, string>>();
postdat.Add(new KeyValuePair<string, string>("name", "sur"));
postdat.Add(new KeyValuePair<string, string>("age", "23"));
HttpContent content = new FormUrlEncodedContent(postdat);
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
HttpResponseMessage res = await client.PostAsync(new
Uri("http://localhost:8070/api/Employee/PostEmployee1"),content);
res.EnsureSuccessStatusCode();
var count = res.Content.ReadAsStringAsync();
Console.WriteLine();
Console.WriteLine("Adding a new employee");
Console.WriteLine("Added succesfully ,EmployeeCount " + count.Result);
}
catch (Exception ex)
{
}
}
private static async void PostEmployee()
{
try
{
Console.WriteLine("");
HttpClient client = new HttpClient();
MediaTypeFormatter formatter = new JsonMediaTypeFormatter();
HttpContent content = new ObjectContent<Employee>(new Employee()
{Name="r",Age=24},formatter,"application/json");
HttpResponseMessage res = await client.PostAsync(new
Uri("http://localhost:8070/api/Employee/PostEmployee2"), content);
res.EnsureSuccessStatusCode();
var count = res.Content.ReadAsStringAsync();
Console.WriteLine();
Console.WriteLine("Adding a new employee");
Console.WriteLine("Added succesfully ,EmployeeCount "+count.Result);
}
catch (Exception ex)
{
}
}
}
Output:
When invoke from advance rest client
url :
http://localhost:8070/api/Employee/PostEmployee1?name=rajesh&age=30
output:
3
From this article you can learn how to create the sample web Api and self host it.
No comments:
Post a Comment