C HttpClient with POST parameters

Question

I use codes below to send POST request to a server   string url    http   myserver method param1 1 amp param2 2      HttpClientHandler handler   new HttpClientHandler    HttpClient httpClient   new HttpClient handler   HttpRequestMessage request   new HttpRequestMessage HttpMethod Post  url   HttpResponseMessage response   await httpClient SendAsync request     I don t have access to the server to debug but I want to know  is this request sent as POST or GET   If it is GET  How can I change my code to send param1  amp  param2 as POST data  not in the URL

User · Answer

As Ben said  you are POSTing your request   HttpMethod Post specified in your code    The querystring  get  parameters included in your url probably will not do anything    Try this    string url    http   myserver method       string content    param1 1 amp param2 2   HttpClientHandler handler   new HttpClientHandler    HttpClient httpClient   new HttpClient handler   HttpRequestMessage request   new HttpRequestMessage HttpMethod Post  url   HttpResponseMessage response   await httpClient SendAsync request content     HTH    bovako

User · Answer

A cleaner alternative would be to use a Dictionary to handle parameters  They are key-value pairs after all   private static readonly HttpClient httpclient   static MyClassName            HttpClient is intended to be instantiated once and re-used throughout the life of an application          Instantiating an HttpClient class for every request will exhaust the number of sockets available under heavy loads          This will result in SocketException errors         https   docs microsoft com en-us dotnet api system net http httpclient view netframework-4 7 1     httpclient   new HttpClient            var url    http   myserver method   var parameters   new Dictionary lt string  string gt       param1    1        param2    2       var encodedContent   new FormUrlEncodedContent  parameters    var response   await httpclient PostAsync  url  encodedContent  ConfigureAwait  false   if  response StatusCode    HttpStatusCode OK           Do something with response  Example get content         var responseContent   await response Content ReadAsStringAsync    ConfigureAwait  false       Also dont forget to Dispose   httpclient  if you dont use the keyword using   As stated in the Remarks section of the HttpClient class in the Microsoft docs  HttpClient should be instantiated once and re-used   Edit   You may want to look into response EnsureSuccessStatusCode    instead of if  response StatusCode    HttpStatusCode OK    You may want to keep your httpclient and dont Dispose   it  See  Do HttpClient and HttpClientHandler have to be disposed   Edit   Do not worry about using  ConfigureAwait false  in  NET Core  For more details look at https   blog stephencleary com 2017 03 aspnetcore-synchronization-context html

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