Synchronous asynchronous method for post and get using HttpClient in ASP.

Preparatory work

1.visual Studio UPDATE3 Development environment

2.net Core 1.0.1 and above

Directory

1.HttpGet method

2.HttpPost method

3. Using the example

4. Code download

1 HttpGet

 <summary>/////Use Get method to get string result (no cookie added)///</summary>//<param name= "url" > </param>//<returns></returns> public static async task<string> Httpgetasync (strin            G URL, Encoding Encoding = null) {HttpClient HttpClient = new HttpClient ();            var data = await httpclient.getbytearrayasync (URL); var ret = encoding.            GetString (data);         return ret; }///<summary>//Http Get synchronization method///</summary>//<param name= "url" ></ param>//<param name= "encoding" ></param>///<returns></returns> Public            static string HttpGet (string url, Encoding Encoding = null) {HttpClient HttpClient = new HttpClient ();            var t = httpclient.getbytearrayasync (URL);            T.wait (); var ret = encoding.            GetString (T.result);      return ret;  } 

　　

2 HttpPost method

 <summary>//POST Async///</summary>//<param name= "url" ></param> <param name= "Poststream" ></param>//<param name= "encoding" ></param>//&lt ;p Aram Name= "TimeOut" ></param>///<returns></returns> public static Async Task<stri ng> httppostasync (string url, dictionary<string, string> formData = null, Encoding Encoding = null, int timeOut                       = 10000) {Httpclienthandler handler = new Httpclienthandler ();            HttpClient client = new HttpClient (handler);            MemoryStream ms = new MemoryStream ();                         Formdata.fillformdatastream (MS);//fill formData httpcontent HC = new Streamcontent (MS); Client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("text/html")); Client. DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("aPplication/xhtml+xml ")); Client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("Application/xml", 0.9)); Client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("IMAGE/WEBP")); Client.             DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("*/*", 0.8)); Hc. Headers.add ("useragent", "mozilla/5.0" (Windows NT 6.1;            WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/31.0.1650.57 safari/537.36 "); Hc.            Headers.add ("Timeout", timeout.tostring ()); Hc.             Headers.add ("KeepAlive", "true"); var r = await client.            Postasync (URL, hc);            byte[] tmp = await r.content.readasbytearrayasync (); return encoding.        GetString (TMP); }///<summary>//POST sync///</summary>//<param name= "url" ></param&        Gt <param name= "Poststream" ></param>///<param name= "encoding" ></param>//<param name= "TimeOut" ></param>///<returns></returns> public Stati C string httppost (string url, dictionary<string, string> formData = null, Encoding Encoding = null, int timeOut = 10            {Httpclienthandler handler = new Httpclienthandler ();            HttpClient client = new HttpClient (handler);             MemoryStream ms = new MemoryStream ();            Formdata.fillformdatastream (MS);//fill formData httpcontent HC = new Streamcontent (MS); Client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("text/html")); Client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("Application/xhtml+xml")); Client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("Application/xml", 0.9)); Client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("IMAGE/WEBP")); Client. DefaultrequesthEaders.            Accept.add (New Mediatypewithqualityheadervalue ("*/*", 0.8)); Hc. Headers.add ("useragent", "mozilla/5.0" (Windows NT 6.1;            WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/31.0.1650.57 safari/537.36 "); Hc.            Headers.add ("Timeout", timeout.tostring ()); Hc.            Headers.add ("KeepAlive", "true"); var t = client.            Postasync (URL, hc);           T.wait ();             var t2 = T.result.content.readasbytearrayasync (); return encoding. GetString (T2.        Result); }///<summary>///Assembly QueryString method//parameter with & connection, first no sign, such as: a=1&b=2&c=3///& lt;/summary>//<param name= "FormData" ></param>///<returns></returns> P Ublic static string getquerystring (this dictionary<string, string> formData) {if (FormData = = nul L | |            Formdata.count = = 0) {return ""; } StringBuilder SB = new StringbuIlder ();            var i = 0;                foreach (var kv in formData) {i++; Sb. AppendFormat ("{0}={1}", Kv. Key, KV.                Value); if (I < Formdata.count) {sb.                Append ("&"); }} return sb.        ToString (); }///<summary>///fill in the form information stream///</summary>//<param name= "FormData" > </param>//<param name= "stream" ></param> public static void Fillformdatastream (this Dict            Ionary<string, string> FormData, Stream stream) {string datastring = GetQueryString (FormData); var formdatabytes = FormData = = null?            New Byte[0]: Encoding.UTF8.GetBytes (datastring); Stream.            Write (formdatabytes, 0, formdatabytes.length); Stream. Seek (0, Seekorigin.begin);//Set pointer read position}

　　

3 Example

Modify the index.cshtml file under view

@{    viewdata["Title"] = "Home page";    Layout = null;} @{   @*var ret1=await Httpclientdemo. Httphelper.httpgetasync ("Http://www.baidu.com", System.Text.Encoding.GetEncoding ("Utf-8"));    @Html. Raw (ret1) *@    @*var Ret2 = Httpclientdemo. Httphelper.httpget ("Http://www.baidu.com", System.Text.Encoding.GetEncoding ("Utf-8"));    @Html. Raw (Ret2) *@    var ret3 = Httpclientdemo. Httphelper.httppost ("http://www.baidu.com", NULL, System.Text.Encoding.GetEncoding ("Utf-8"));    @Html. Raw (ret3)    @*var ret4 = await httpclientdemo. Httphelper.httppostasync ("http://www.baidu.com", NULL, System.Text.Encoding.GetEncoding ("Utf-8"), 10000);    @Html. Raw (RET4) *@}

　

4 Code Download

Link: Http://pan.baidu.com/s/1gfdqwDX Password: DXZP

Synchronous asynchronous method for post and get using httpclient in ASP. NET Core