private async Task onUpdateBtnClicked(object sender, EventArgs e) { //Sending HTTP request to update Mailing Address Task <string> httpTask = Task.Run <string>(() => HttpRequestHandler.EditCompanyProfileRequest("http://www2.sesco.com.my/etender/vendor/vendor_company_editSubmit.jsp", name, regno, mailingAddress.Text, coucode)); var httpTaskResult = httpTask.Result.ToString(); Console.WriteLine(httpTaskResult); if (httpTaskResult == "OK") { await DisplayAlert("Success", "Company mailing address has been updated.", "OK"); } var page = App.Current.MainPage as rootPage; var userInfoPage = new userInfoPage(); page.changePage(userInfoPage); }