如何调用restful webservice

Question

How do i connect to any restful webservice using C#

I have the below information about the webservice

The BASE_URL is the URL at which the WebServices are hosted. This BASE_URL is then followed by the required GROUP name, and then the required METHOD name.

For example,

BASE_URL = https://www.abcd.com/ws/

GROUP = transaction

METHOD = createTransaction

This would give a complete URL of :

https://www.abcd.com/ws/transaction/createTransaction

Every invocation must contain the following parameters (as POST variables) :

Name

username 

password 

pin 

Please help me with some link to achieve the coding.

Answer 1

You can use HttpClient class.

 static async void Main()
    {
        try 
           {
      // Create a New HttpClient object.
      HttpClient client = new HttpClient();

      HttpResponseMessage response = await client.PostAsync("https://www.abcd.com/ws/transaction/createTransaction");
      response.EnsureSuccessStatusCode();
      string responseBody = await response.Content.ReadAsStringAsync();
      // Above three lines can be replaced with new helper method in following line 
      // string body = await client.GetStringAsync(uri);

      Console.WriteLine(responseBody);
    }  
    catch(HttpRequestException e)
    {
      Console.WriteLine("\nException Caught!"); 
      Console.WriteLine("Message :{0} ",e.Message);
    }
  }

This is not complete, you have to pass your parameters to PostAsync method in HttpContent object format.

Answer 2

This is one technique of calling or consuming rest webservice in asp.net c#

var client = new RestClient("url");
var request = new RestRequest(Method.POST);
request.AddHeader("content-type", "application/json");
request.AddParameter("application/x-www-form-urlencoded","type=password&user_id=test@gmail.com",ParameterType.RequestBody);
IRestResponse response = client.Execute(request);