Memory increase gradually after every HTTPClient Call in Xam

Question

Memory increase gradually after every HTTPClient Call in Xamarin iOS. GC collection is not effective

I have monitor the Application Activity using **Instrument**. I have noticed that **Real mem** is gradually increase. I just need release the memory which is used by HTTPClient.

I have tried using Dispose(),used using statement,used GC.collect; but those are not reducing the memory. It looks like not effective.

Below is code used in the program.

namespace MemoryManagementStudy

{

public partial class ViewController : UIViewController

{

protected ViewController(IntPtr handle) : base(handle)

{

}

NetworkStaticCall networkStaticCall;

public override void ViewDidLoad()

{

//lblStatusUpdate.Text = "Success Count: 0, Fail Count: 0 -- Last Update: " + DateTime.Now;

base.ViewDidLoad();

//string status = "";

networkStaticCall = new NetworkStaticCall();

networkStaticCall.init();

Timer timer = new Timer(1000 * 30);

timer.AutoReset = true;

timer.Elapsed += async (sender, e) => {

Console.WriteLine("Memory " + GC.GetTotalMemory(true));

await networkStaticCall.MakeSMWebService();

Console.WriteLine("Memory " + GC.GetTotalMemory(true));

};

timer.Start();

}

public override void DidReceiveMemoryWarning()

{

base.DidReceiveMemoryWarning();

}

}

class NetworkStaticCall

{

//int successCount = 0;

//int failCount = 0;

private static HttpClient httpClient;

private static HttpResponseMessage httpResponseMessage;

private StringContent dataContent;

private string xmlString;

private static HttpClientHandler httpClientHandler;

private NSUrlSessionHandler nsUrlSessionHandler;

public void init()

{

httpClientHandler = new HttpClientHandler();

httpClientHandler.Credentials = new NetworkCredential("userName", "Password"); ;

httpClient = new HttpClient(httpClientHandler);

httpClient.DefaultRequestHeaders.Accept.Clear();

dataContent = new StringContent("Xml String Content",

Encoding.UTF8, "text/xml");

}

public async Task MakeSMWebService()

{

Console.WriteLine("Call Processing");

try

{

httpClient.DefaultRequestHeaders.Accept.Clear();

httpResponseMessage = await httpClient.PostAsync("url", dataContent);

Console.WriteLine("Call success");

xmlString = await httpResponseMessage.Content.ReadAsStringAsync();

//successCount++;

}

catch (Exception ex)

{

Console.WriteLine(ex.Message);

}

return "";

}

}

}

We have tried https://stackoverflow.com/a/27830926 but it is not working.

I have tried WebRequest but it still increasing

class CustomWebRequest{

string finalUrl = "URL";

WebRequest request;

WebResponse response;

StreamReader reader;

int successCount = 0;

int failCount = 0;

public void init(){

}

async public Task Post()

{

request = WebRequest.Create(finalUrl);

request.Method = "GET";

request.Timeout = 10000;

try

{

using (await request.GetResponseAsync())

{

using (reader = new StreamReader(response.GetResponseStream()))

{

Console.WriteLine(reader.ReadToEnd());

}

}

successCount++;

}

catch (Exception ex)

{

Console.WriteLine(ex.Message);

failCount++;

}

finally

{

if (response != null)

{

response.Close();

response.Dispose();

response = null;

}

if (reader != null)

{

reader.Close();

reader.Dispose();

reader = null;

}

if(request != null){

request.Abort();

request = null;

}

}

return string.Format("Success Count: {0}, Fail Count: {1}", successCount, failCount);

}

}