Making an API call if response is SUCCESS in asp.net

Question

I have a method based on which I bring response as SUCCESS and FAILURE. So on SUCCESS status I want to make an API call which is https://testabc.com/xxxxx/pmp/xxx

Below is that method.

public void IsSiteIPLValidorNot(string NEID, out string response)
    {
        response = ""; string status = string.Empty;
        response = CommonUser.GET_IPL_STATUS_ON_NEID(NEID);

        if (response == "SUCCESS")
        {
            // call api here
        }
        else
        {
            ScriptManager.RegisterStartupScript(this, GetType(), "showalert", "alert('Site is not IPL');", true);
        }
    }

Do let me know how can be done in simple and easy way.

EDIT

The details of API is here.

url --location 'https://testabc.com/xxxx/pmp/xxx' \
--header 'Content-Type: application/json' \
 --data '{
"A6_NEID": "INGJJMGRPVTGNB0001PMPAA6001",
"Azimuth": 10,
"Height": 26,
"VerticalBeamwidthTilt": 2,
"VerticalBeamwidth": 30,
"HorizantalBeam": 65,
"DistanceofCone": 500,
"SourceSystem": "MANUAL"
}'

Answer 1

Microsoft has a great documentation about making HTTP requests, but I'll also provide you an example for your case:

// Please, consider using IHttpClientFactory, instantiating a new handler for each request can lead to socket exhaustion 
var httpClient = new HttpClient
{
    // Think of this as the base url for all your api calls
    BaseAddress = new Uri("https://testabc.com")
};

var content = new
{
    A6_NEID = "INGJJMGRPVTGNB0001PMPAA6001",
    Azimuth = 10,
    Height = 26,
    VerticalBeamwidthTilt = 2,
    VerticalBeamwidth = 30,
    HorizantalBeam = 65,
    DistanceofCone = 500,
    SourceSystem = "MANUAL"
};

// Send the request (automatically serializes the content as json and adds the content-type header)
HttpResponseMessage response = await httpClient.PostAsJsonAsync("/xxxx/pmp/xxx", content);

// This will throw an exception if the response is not successful
response.EnsureSuccessStatusCode();

// If you need to read the response, you can:
// Read as string
var result = await response.Content.ReadAsStringAsync();
// Or, deserialize to a class
var result = await response.Content.ReadFromJsonAsync<YourClass>();
// Etc...