GetDataFromSQLGroups, C#

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public static string GetDataFromSQLGroups(clsGroupCallInput objInputData, clsGroupCallType callType)
        {
            var result = new List<dynamic>();
            var resultTemp = new List<dynamic>();
            List<ef.AppPagingDetails> objPagingDetails = null;
            List<Task> tasks = null;
            int iTotalRecords = 0;
            try
            {
              
                objPagingDetails = new List<ef.AppPagingDetails>();
                if (!string.IsNullOrWhiteSpace(objInputData.sPagingDetails))
                {
                    objPagingDetails = JsonConvert.DeserializeObject<List<ef.AppPagingDetails>>(objInputData.sPagingDetails);
                }
                var groupList = GroupList.Groupdetail;
                tasks = new List<Task>();
                if (groupList != null && groupList.Count > 0)
                {
                    foreach (Vagaro.Web.Business.Groupdetail group in groupList)
                    {
                        int newPageIndex = 1;
                        if (objInputData.pageIndex == 1)
                        {
                            objPagingDetails.Add(new ef.AppPagingDetails
                            {
                                sGroup = group.GroupValue,
                                skipRecords = 0,
                                isPast = objInputData.isPastApp
                            });
                        }
                        else
                        {
                            if (objPagingDetails.Any(x => x.sGroup == group.GroupValue && x.isPast == objInputData.isPastApp))
                            {
                                newPageIndex = objPagingDetails.Where(x => x.sGroup == group.GroupValue && x.isPast == objInputData.isPastApp).FirstOrDefault().skipRecords;
                            }
                        }
                        newPageIndex = ((newPageIndex == 0 ? 1 : newPageIndex) - 1);

if (callType == clsGroupCallType.MyAccount_Appointment)
                        {
                            var task = Task.Factory.StartNew<List<dynamic>>((o) =>
                            {
                                return GetAppointmentGroupWise(objInputData.userID, objInputData.isPastApp, newPageIndex, objInputData.pageSize, objInputData.LoadServiceClass, group.GroupValue, (objInputData.IsCallFromCheckIn ? objInputData.businessID : null), objInputData.IsCallFromCheckIn);
                            }, 3);
                            tasks.Add(task);
                            if (task.Result != null && task.Result.Count > 0)
                            {
                                resultTemp.AddRange(task.Result);
                                if (objInputData.pageIndex == 1)
                                {
                                    iTotalRecords = iTotalRecords + task.Result[0].TotalPage;
                                }
                            }
                        }
                        else if (callType == clsGroupCallType.MyAccount_Product)
                        {

}
                    }
                    Task.WaitAll(tasks.ToArray());
                }

if (resultTemp.Count > 0)
                {
                    if (callType == clsGroupCallType.MyAccount_Appointment)
                    {
                        if (objInputData.isPastApp)
                        {
                            result = resultTemp.OrderByDescending(obj => obj.StartTime).Take(objInputData.pageSize).ToList();
                        }
                        else
                        {
                            result = resultTemp.OrderBy(obj => obj.StartTime).Take(objInputData.pageSize).ToList();
                        }
                    }
                    else if (callType == clsGroupCallType.MyAccount_Product)
                    {

}

foreach (Vagaro.Web.Business.Groupdetail grp in groupList)
                    {
                        int totalCount = 0;
                        var tmpObj = resultTemp.Where(o => o.sGroup == grp.GroupValue).Select(x => x).FirstOrDefault();
                        if (tmpObj != null)
                        {
                            totalCount = Convert.ToInt32(tmpObj.TotalPage);
                        }

if (result.Any(x => x.sGroup == grp.GroupValue))
                        {
                            var objUpdate = objPagingDetails.Where(obj => obj.sGroup == grp.GroupValue && obj.isPast == objInputData.isPastApp).FirstOrDefault();
                            if (objUpdate != null)
                            {
                                //int intGroupWiseCount = result.Where(obj => obj.sGroup == grp.GroupValue).Count();
                                objUpdate.skipRecords = objUpdate.skipRecords + result.Where(obj => obj.sGroup == grp.GroupValue).Count();
                                if (objInputData.pageIndex == 1)
                                {
                                    objUpdate.skipRecords += 1;
                                    objUpdate.totalRecords = iTotalRecords;
                                }
                                if (objUpdate.skipRecords > totalCount)
                                {
                                    objUpdate.skipRecords = -1;
                                }
                            }
                            else
                            {
                                objPagingDetails.Add(new ef.AppPagingDetails
                                {
                                    sGroup = grp.GroupValue,
                                    skipRecords = result.Where(obj => obj.sGroup == grp.GroupValue).Count(),
                                    isPast = objInputData.isPastApp
                                });
                            }
                        }
                        else if (resultTemp.Any(x => x.sGroup == grp.GroupValue))
                        {
                            var objUpdate = objPagingDetails.Where(obj => obj.sGroup == grp.GroupValue && obj.isPast == objInputData.isPastApp).FirstOrDefault();
                            if (objInputData.pageIndex == 1 && objUpdate != null)
                            {
                                objUpdate.skipRecords += 1;
                                objUpdate.totalRecords = iTotalRecords;
                            }
                        }
                        else
                        {
                            var objUpdate = objPagingDetails.Where(obj => obj.sGroup == grp.GroupValue && obj.isPast == objInputData.isPastApp).FirstOrDefault();
                            if (objUpdate != null)
                                objUpdate.skipRecords = -1; // objUpdate.skipRecords + (from obj in result where obj.Group == grp.GroupValue select obj).Count();
                        }

}
                    result[0].TotalPage = objPagingDetails.Where(obj => obj.isPast == objInputData.isPastApp).FirstOrDefault().totalRecords; // objPagingDetails.Where(obj => obj.isPast == isPastApp).FirstOrDefault().totalRecords;
                    result[0].sPagingDetails = JsonConvert.SerializeObject(objPagingDetails);
                }
                //string test = JsonConvert.SerializeObject(objPagingDetails);
                groupList = null;
                //return result;
                return JsonConvert.SerializeObject(result);
            }
            catch (Exception ex)
            {
                ex.HandleException(Declaration.Platform.WebSite, 0, objInputData.userID, true);
                throw new Exception("Something went wrong. Please try again");
            }
            finally
            {
                tasks = null;
                result = null;
                resultTemp = null;
                objPagingDetails = null;
            }

}

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