public IActionResult Edit(CaseSessionVM model)
        {
            model.DateFrom = model.DateFrom.MakeEndSeconds();
            model.DateTo   = model.DateFrom.AddMinutes(model.DateTo_Minutes).MakeEndSeconds();
            SetHelpFile(HelpFileValues.SessionMainData);

            if (!ModelState.IsValid)
            {
                SetViewbag(model.Id, model.CaseId, model.Id);
                return(View(nameof(Edit), model));
            }

            string _isvalid = IsValid(model);

            if (_isvalid != string.Empty)
            {
                SetViewbag(model.Id, model.CaseId, model.Id);
                SetErrorMessage(_isvalid);
                return(View(nameof(Edit), model));
            }

            var currentId  = model.Id;
            var saveResult = service.CaseSession_SaveData(model);

            if (saveResult.Result)
            {
                SetAuditContext(service, SourceTypeSelectVM.CaseSession, model.Id, currentId == 0);
                this.SaveLogOperation(currentId == 0, model.Id);

                if ((!service.IsExistCaseSessionResult(model.Id)) && (model.SessionStateId == NomenclatureConstants.SessionState.Provedeno))
                {
                    SetSuccessMessage(MessageConstant.Values.SaveOK + " Моля, добавете резултат от заседание.");
                    return(RedirectToAction("AddResult", new { caseSessionId = model.Id }));
                }
                else
                {
                    SetSuccessMessage(MessageConstant.Values.SaveOK);
                    return(RedirectToAction(nameof(Preview), new { id = model.Id }));
                }
            }
            else
            {
                SetErrorMessage(saveResult.ErrorMessage);
            }

            SetViewbag(model.Id, model.CaseId, model.Id);
            return(View(nameof(Edit), model));
        }