The basic operation of WinForm to the web Api increase and search

Webapi Code:

 public class Valuescontroller:apicontroller {entities db=new entities (); Get api/values public ienumerable<person> get () {return db.
        person; //Get API/VALUES/5 public person get (int id) {return db.
        Person.firstordefault (o => o.id = ID); }//Post api/values public void POST ([Frombody]person value) {//People peple = (Peo
            PLE) Jsonconvert.deserializeobject (value); if (db. Person.firstordefault (o => o.id = = value.id) = = null) {db. 
            Person.add (value); } db.
        SaveChanges (); //Put api/values/5 public void put (int id, [Frombody]person value) {var query = d
            B.person.firstordefault (o => o.id = ID); if (query!= null) {query. Name = value.
            Name; } db. SAvechanges (); }//DELETE api/values/5 public void DELETE (int id) {var query = db.
            Person.firstordefault (o => o.id = ID); if (query!= null) {db.
                Person.remove (query); Db.
            SaveChanges (); }
          
           
        }
    }

The basic code for the

WinForm:

 Private Uri URL = new Uri ("Http://localhost:18827/api/values"); <summary>///Add///</summary> private async void Button1_Click (object sender, Eve
            Ntargs e) {People people = new people (); People. Id = new Random ().
            Next (100, 9999999); People. Name = "Li" + people.
            Id;

            String data = Jsonconvert.serializeobject (people); Create a DataContractJsonSerializer DataContractJsonSerializer that handles serialization serializer = new DataContractJsonSerializer (
            typeof (People));
            MemoryStream ms = new MemoryStream (); Serializer.
            WriteObject (MS, people); Be sure to set the position Ms here.
            Position = 0; Httpcontent content = new Streamcontent (ms)//convert MemoryStream to Httpcontent//Be sure to set header content.
            Headers.contenttype = new System.Net.Http.Headers.MediaTypeHeaderValue ("Application/json");
    HttpClient client = new HttpClient ();        Post Method Httpresponsemessage response = Await client is issued by HttpClient.

            Postasync (URL, content); if (response. Issuccessstatuscode) {} else {}}/// <summary>///Delete///</summary> private async void Button2_Click (object sender, Eventa
                RGS e) {httpclient client = new HttpClient (); Issued by HttpClient Delete method Httpresponsemessage response = await client.
                Deleteasync (URL + "/1"); if (response.
                Issuccessstatuscode) {MessageBox.Show ("success"); }///modify Private async void Button3_Click (object sender, EventArgs e) {//Create a DataContractJsonSerializer DataContractJsonSerializer serializer = new DataContractJsonSerializer for processing serialization (TYPEO
            F (People)); MemoryStream ms = NEW MemoryStream (); Writes the data to MemoryStream serializer.
            WriteObject (MS, New people () {Id = 1, Name = "Hello ni"}); Be sure to set the position Ms here.
            Position = 0; Httpcontent content = new Streamcontent (ms);//convert MemoryStream to httpcontent content.
            Headers.contenttype = new System.Net.Http.Headers.MediaTypeHeaderValue ("Application/json");
           HttpClient client = new HttpClient (); Issued by httpclient httpresponsemessage response = await client.
            Putasync (URL + "/1", content); if (response.
            Issuccessstatuscode) {MessageBox.Show ("success"); }///<summary>///get all///</summary> private void Button4_Click (
                Object sender, EventArgs e) {using (WebClient client = new WebClient ()) { Client.
                headers["Type"] = "get"; Client. headers["Accept"] = "appLication/json "; Client.
                Encoding = Encoding.UTF8; Client. downloadstringcompleted + = (senderobj, es) => {if (es). Result!= null) {var test = jsonconvert.deserializeobject<people[]> (es.
                        result);
                    Datagridview1.datasource = test;
                }
                }; Client.


            DownloadStringAsync (URL); }
        }