how to upload header and json data to url to get result in mvc

another approach is to use the RestSharp library, which provides a simpler and more intuitive way to make HTTP requests in C#.

using System;
using RestSharp;

class Program
{
    static void Main(string[] args)
    {
        // Define your endpoint URL
        string apiUrl = "your_api_endpoint_url_here";

        // Create RestClient instance
        RestClient client = new RestClient(apiUrl);

        // Create RestRequest instance with POST method
        RestRequest request = new RestRequest(Method.POST);

        // Set header parameters
        request.AddHeader("YourHeaderName", "YourHeaderValue");

        // Define your JSON data
        string jsonData = "{\"key1\": \"value1\", \"key2\": \"value2\"}";

        // Set request body as JSON data
        request.AddParameter("application/json", jsonData, ParameterType.RequestBody);

        // Execute the request
        IRestResponse response = client.Execute(request);

        // Check if the request was successful
        if (response.IsSuccessful)
        {
            // Output response content
            Console.WriteLine("Response:");
            Console.WriteLine(response.Content);
        }
        else
        {
            // Output error message
            Console.WriteLine("Error: " + response.ErrorMessage);
        }
    }
}

using HttpClient

 

using System;
using System.Net.Http;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        // Create a HttpClient instance
        using var httpClient = new HttpClient();

        // Set the base address of your API
        httpClient.BaseAddress = new Uri("https://your-api-base-url.com");

        // Add headers as needed
        httpClient.DefaultRequestHeaders.Add("Authorization", "Bearer your_access_token");

        try
        {
            // Define your JSON raw data
            string jsonData = "{\"key\":\"value\"}";

            // Create the HTTP request message with POST method and JSON content
            var request = new HttpRequestMessage(HttpMethod.Post, "/your-api-endpoint");
            request.Content = new StringContent(jsonData, System.Text.Encoding.UTF8, "application/json");

            // Send the request and await the response
            var response = await httpClient.SendAsync(request);

            // Check if the response is successful
            if (response.IsSuccessStatusCode)
            {
                // Read the response content
                string responseContent = await response.Content.ReadAsStringAsync();
                Console.WriteLine("Response:");
                Console.WriteLine(responseContent);
            }
            else
            {
                // Print error status code and reason phrase
                Console.WriteLine($"Error: {response.StatusCode} - {response.ReasonPhrase}");
            }
        }
        catch (Exception ex)
        {
            // Handle any exceptions
            Console.WriteLine($"Exception: {ex.Message}");
        }
    }
}