How to use Asynch instead of synchcronous

Question

Hi,

 

How to use

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult ReRunFailedSelectedBilling(List<BillingFailedViewModel> FailedGroups)
{
if (_logger.IsInfoEnabled)
_logger.LogInfo(string.Format("Entering ReRunFailedSelectedBilling"));
List<BillingFailedViewModel> CGs = FailedGroups.Where(x => x.ReRunFlag).ToList();
// Re-using code to get something working for GPSI. This should actually remove all the CGs and then process a single WFR. For now, we'll process one WFR for each CG...
foreach (BillingFailedViewModel group in CGs)
{
using (var dbContextScope = _dbContextScopeFactory.Create())
{
ReRunModel run = new ReRunModel((int)group.Id, DbConnection, ServerURL);
var login = HttpContext.User.Identity.Name;
run.Reject(login);
if (run._Status.Success == false)
{
TempData["Failure"] = "Error in rejection. Failed to reject.";
}
else
{
// Create a new workflow request and re-run
var wfr = run.SetWorkflowRequest();
dbContextScope.SaveChanges();
run.WorkflowRequestId = wfr.Id;
run.Run(run.RunSychronousService(), login); Question : How to use Asynch instead of synchcronous
}
}
}
}

Asynch Method available in class - startrunmodel.cs

public async Task RunAsync(string login)
{
logger.LogInfo(string.Format("PERF RunAsync starting"));
// Kick off the server job
string customer = wfRepo.GetCurrentUserCustomer(_User.WindowsUserName).Customer.Code;
ServiceStatus status = new ServiceStatus { Success = false, Message = "Run failed." };
Task[] wfrTasks = new Task[WorkflowRequests.Count()];
int idx = 0;
foreach (var wfr in WorkflowRequests)
{
WorkflowRequest request = new WorkflowRequest()
{
WorkflowRequestId = wfr.Id.ToString(),
CustomerCode = customer,
UserName = _User.WindowsUserName,
LoginName = login
};
try
{
logger.LogInfo(string.Format("PERF RequestBillingAsync {0} called", wfr.Id.ToString()));
wfrTasks[idx++] = _Service.RequestBillingAsync(request);
}
catch (Exception e)
{
logger.LogError("RequestBilling failed ", e);
}
logger.LogInfo(string.Format("PERF RequestBillingAsync {0} returned", wfr.Id.ToString()));
//_Status.Add(status);
}
//await Task.WhenAll(wfrTasks);
await Task.Yield();
logger.LogInfo(string.Format("PERF RunAsync ending "));
// return status;
}