ActionFilterAttribute OnActionExecutedAsync сохраняет объект регистратора в базе данных

Question

Я использую глобальный атрибут ActionFilterAttribute для подключения моей логики регистрации, и я хочу сохранить объект журнала в базу данных.

[AttributeUsage(AttributeTargets.Method, AllowMultiple = true)] 
public sealed class RequireHttpHeaderAttribute : ActionFilterAttribute 
{ 
    public ApplicationDbContext db = new ApplicationDbContext(); 

    public override async Task OnActionExecutedAsync(HttpActionExecutedContext httpActionExecutedContext, CancellationToken cancellationToken) 
    { 
     HttpActionExecutedContext executedContext; 
     var WebServiceRequestURI = httpActionExecutedContext.Request.RequestUri; 
     var WebServiceRequestMethod = httpActionExecutedContext.Request.Method; 
     Task<string> content = httpActionExecutedContext.Request.Content.ReadAsStringAsync(); 
     string WebServiceRequestBody = content.Result; 
     if (WebServiceRequestBody == "") 
      WebServiceRequestBody = "No-Content"; 
     var UserID = httpActionExecutedContext.Request.GetOwinContext().Authentication.User.Claims.First().Value; 
     // Get the sender address 
     var myRequest = ((HttpContextWrapper)httpActionExecutedContext.Request.Properties["MS_HttpContext"]).Request; 
     var IPAddress = myRequest.ServerVariables["HTTP_X_FORWARDED_FOR"]; 
     if (!string.IsNullOrEmpty(IPAddress)) 
     { 
      string[] ipRange = IPAddress.Split(','); 
      int le = ipRange.Length - 1; 
      string trueIP = ipRange[le]; 
     } 
     else 
     { 
      IPAddress = myRequest.ServerVariables["REMOTE_ADDR"]; 
     } 

     var webserviceRequestDate = DateTime.Now; 
     FMBP_ActionLog fMBP_ActionLog = new FMBP_ActionLog(); 
     fMBP_ActionLog.WebServiceRequestString = WebServiceRequestURI.ToString(); 
     fMBP_ActionLog.WebServiceRequestMethod = WebServiceRequestMethod.ToString(); 
     fMBP_ActionLog.WebServiceRequestBody = WebServiceRequestBody; 
     fMBP_ActionLog.WebServiceRequestDate = DateTime.Now; 
     fMBP_ActionLog.IPAddress = IPAddress; 
     fMBP_ActionLog.UserID = UserID; 
     fMBP_ActionLog.StatusCode = (int)httpActionExecutedContext.Response.StatusCode; 
     db.FMBP_ActionLog.Add(fMBP_ActionLog); 
     db.SaveChanges(); 
    } 
} 

Каким образом можно сохранить FMBP_ActionLog в базу данных? Я получаю ряд случайных ошибок, подобных этому

"ExceptionMessage":"The changes to the database were committed successfully, but an error occurred while updating the object context. The ObjectContext might be in an inconsistent state. 

Answer 1

Это решило проблему. Он не использовал контекст db.

using (var db = new ApplicationDbContext()) 
    { 
     FMBP_ActionLog fMBP_ActionLog = new FMBP_ActionLog(); 
     fMBP_ActionLog.WebServiceRequestString = WebServiceRequestURI.ToString(); 
     fMBP_ActionLog.WebServiceRequestMethod = WebServiceRequestMethod.ToString(); 
     fMBP_ActionLog.WebServiceRequestBody = WebServiceRequestBody; 
     fMBP_ActionLog.WebServiceRequestDate = DateTime.Now; 
     fMBP_ActionLog.IPAddress = IPAddress; 
     fMBP_ActionLog.UserID = UserID; 
     fMBP_ActionLog.StatusCode = (int)httpActionExecutedContext.Response.StatusCode; 
     db.FMBP_ActionLog.Add(fMBP_ActionLog); 
     // Perform data access using the context 
     db.SaveChanges(); 
    }