Using the console program to build Webapi

Original reference:

ASP. NET Web API 2.2:create a self-hosted owin-based Web API from Scratch

New console program, introducing Owin Package

Pm> Install-package Microsoft.aspnet.webapi.owinselfhost-pre

Add Startup Class

 Public classStartup { Public voidConfiguration (Iappbuilder app) {varWebapiconfiguration =Configurewebapi (); //Use the extension method provided by the Webapi.owin library:app.        Usewebapi (webapiconfiguration); }        Privatehttpconfiguration Configurewebapi () {varConfig =Newhttpconfiguration (); Config. Routes.maphttproute ("Defaultapi",                "Api/{controller}/{id}",                New{id =routeparameter.optional}); returnconfig; }    }

Add Models,Controllers folder, add Company, Companiescontroller

 Public class company    {        [Key]        publicintgetset;}          Public string Get Set ; }    }

 Public classCompaniescontroller:apicontroller {applicationdbcontext _db=NewApplicationdbcontext ();  PublicIenumerable<company>Get () {return_db.companies; }         Public AsyncTask<company> Get (intID) {varCompany =await_db.companies.firstordefaultasync (c = c.id = =ID); if(Company = =NULL)            {                Throw Newhttpresponseexception (System.Net.HttpStatusCode.NotFound); }            returnCompany ; }         Public AsyncTask<ihttpactionresult>Post (company company) {if(Company = =NULL)            {                returnBadrequest ("Argument Null"); }            varCompanyexists =await_db.companies.anyasync (c = c.id = =Company .            ID); if(companyexists) {returnBadrequest ("Exists");            } _db.companies.add (company); await_db.savechangesasync (); returnOk (); }         Public AsyncTask<ihttpactionresult>Put (company company) {if(Company = =NULL)            {                returnBadrequest ("Argument Null"); }            varexisting =await_db.companies.firstordefaultasync (c = c.id = =Company .            ID); if(Existing = =NULL)            {                returnNotFound (); } existing. Name=Company .            Name; await_db.savechangesasync (); returnOk (); }         Public AsyncTask<ihttpactionresult> Delete (intID) {varCompany =await_db.companies.firstordefaultasync (c = c.id = =ID); if(Company = =NULL)            {                returnNotFound ();            } _db.companies.remove (company); await_db.savechangesasync (); returnOk (); }    }

View Code

Add EntityFramework package, add Applicationdbcontext

namespaceconsolewebapi.models{ Public classApplicationdbcontext:dbcontext { PublicApplicationdbcontext ():Base("MyDatabase")        {        }         PublicIdbset<company> Companies {Get;Set; } }     Public classApplicationdbinitializer:dropcreatedatabasealways<applicationdbcontext>    {        protected Override voidSeed (Applicationdbcontext context) {Base.            Seed (context); CONTEXT.COMPANIES.ADD (NewCompany {Name ="Microsoft" }); CONTEXT.COMPANIES.ADD (NewCompany {Name ="Google" }); CONTEXT.COMPANIES.ADD (NewCompany {Name ="Apple" }); }    }}

View Code

Add a connection string in app. Config

<connectionStrings>    <add name="MyDatabase" connectionstring= " Data Source=.;i Nitial catalog=test;integrated security=true; Connect timeout=15; Encrypt=false; Trustservercertificate=true; Applicationintent=readwrite; Multisubnetfailover=false "providername="System.Data.SqlClient"/>  </connectionStrings>

View Code

Add code to the entry main

Static voidMain (string[] args) {Console.WriteLine ("Initializing and Seeding database ..."); Database.setinitializer (NewApplicationdbinitializer ()); vardb =NewApplicationdbcontext (); intCount =Db.Companies.Count (); Console.WriteLine ("Initializing and seeding database with {0} company records ...", Count); stringBaseUri ="http://localhost:8080"; Console.WriteLine ("starting web Server ..."); Webapp.start<Startup>(BaseUri); Console.WriteLine ("Server running at {0}-press Enter to quit.", BaseUri);        Console.ReadLine (); }

View Code

Start the program, open HTTP://LOCALHOST:8080/API/COMPANIES/1

You can see the results.

Using the console program to build Webapi