{"the request was aborted: the connection was closed unexpectedly."}. I got this message when all api in for loop

Question

the first request i=1 is done but the next is getting this message:

{"the request was aborted: the connection was closed unexpectedly."}.

Here is my code

        for (var i = 1; i <= 4; i++)
    {
        var token = GetToken();
        string token_cookie = ConfigurationManager.AppSettings["token_cookie"].ToString();
        var request = System.Net.WebRequest.Create(url + "/Revenue/GetList") as System.Net.HttpWebRequest;
        request.Method = "POST";
        request.UserAgent = "api-explorer-client";
        request.ContentType = "application/json";
        request.Headers["Cookie"] = token_cookie;
        request.Headers["Authorization"] = "Bearer " + token;

        string body = "{" + "\n " + "\"DateFrom\": \"" + "2024-09-01" + "\","
                  + "\n " + "\"DateTo\": \"" + DateTime.Now.ToString("yyyy-MM-dd") + "\","
                  + "\n " + "\"BranchID\": \"" + "0" + "\","
                  + "\n " + "\"DataType\": \"" + "all" + "\","
                  + "\n " + "\"PagingNumber\": \"" + 1.ToString() + "" + "\""
                  + "\n " + "}";

        byte[] postBytes = Encoding.UTF8.GetBytes(body);
        //request.ContentLength = postBytes.Length;
        using (Stream stream = request.GetRequestStream())
        {
            stream.Write(postBytes, 0, postBytes.Length);//error here
        }
        string responseContent = "";
        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        {
            using (StreamReader streamReader = new StreamReader(response.GetResponseStream()))
            {
                responseContent = streamReader.ReadToEnd();
                RevenueList revenueList = JsonConvert.DeserializeObject<RevenueList>(responseContent);
                DataTable RevList = new DataTable();
                RevList = ToDataTable<RevenueListData>(revenueList.Data);
                           
                InsertBulkTable(RevList, "RevenueList");
                //currentPage++;
                streamReader.Close();
            }
        }
        request.Abort();
    }
}

i have also use another way but still got the message

Answer 1

I advise you to use an HTTPClient, I made a version of your code that could work with it.

If you are not familliar with How to Post trough HTTPClient go read this

public class SendFourRequest()
{
    private readonly HttpClient _client;

    private string address = "https://localhost:3333/api" // Choose the target address of your client

    public SendFourRequest(HttpClient httpClient)
    {
        _client = httpClient;
    }

    public Task sendRequestsAsync()
    {
        for (int i = 0; i < 4; i++)
        {

            // This create a model with all the propertiew wou wanted
            var bodyContent = new RequestBodyModel()
            {
                DateFrom = DateTime.Parse("2024-09-01"),
                DateTo = DateTime.Now(),
                PagingNumber = i
            };

            // creation of the request
            var request = new HttpRequestMessage(HttpMethod.Post, address);
            // Adding the body as a jsonContent
            request.Content = JsonContent.Create(bodyContent);

            var response = await _client.SendAsync(request);
            // Here you can check the response if wanted
        }
    }

    private class RequestBodyModel()
    {
        public DateTime DateFrom { get; set; }
        public DateTime DateTo { get; set; }
        public int BranchID { get; set; } = 0
        public string DataType { get; set; } = "all"
        public int PagingNumber { get; set; }
    }
}

The HTTPClient is in my case a Parameter but you can create one in the class. If you need to add cookie to it, go look how to set Cookie on HTTPClient