How to call Web API in Console Application using Query string Param

Question

I have parameter's In my Query string so I need to pass like below given URL:

URL + ?dd={{Some Json Data}}&accessKey=ddfr54r5g5r

WebClient webClient = new WebClient();
webClient.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
string url = "URL + ?dd={{Some Json Data}}&accessKey=ddfr54r5g5r";
var jsonData = webClient.DownloadData(url);
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(RootObject));
RootObject obj = new RootObject();
obj = (RootObject)ser.ReadObject(new MemoryStream(jsonData));

Can anyone share some method which will be working for your API.

Answer 1

If your URL is a variable then why you are stringifying it. It should be like

string url = URL + "?dd={{Some Json Data}}&accessKey=ddfr54r5g5r";

Again no need of instantiating a DataContractJsonSerializer for desrializing the data. Rather use Newtonsoft.Json and call the DeserializeObject() method like var data = JsonConvert.DeserializeObject<RootObject>(jsonData);

I would suggest to use System.Net.Http.HttpClient class rather which gives more control. Something like

   using (HttpClient client = new HttpClient())
   {
      try   
      {
         string responseBody = await client.GetStringAsync(uri);
         var data = JsonConvert.DeserializeObject<RootObject>(responseBody);         
      }  
      catch(HttpRequestException e)
      {
          //log exception
      }
   }

See https://learn.microsoft.com/en-us/aspnet/web-api/overview/advanced/calling-a-web-api-from-a-net-client to get more idea on this