Conditional Query in linq

 var BusinessPlanID = Convert.ToInt32(ddlSearchBuisnessPlan.SelectedValue.ToString());
                var CategoryID = Convert.ToInt32(ddlSearchCategory.SelectedValue.ToString());
                var StratergicTypeID = Convert.ToInt32(ddlSearchStratergicType.SelectedValue.ToString());
                var StatusID = Convert.ToInt32(ddlSearchStatus.SelectedValue.ToString());
                var OsoId = Convert.ToInt32(ddlSearchOso.SelectedValue.ToString());

                IQueryable<View_Initiative> query = db.View_Initiative.Where(x => x.IsDeleted == 0);

                if (BusinessPlanID != 0)
                {
                    query = query.Where(p => p.BusinessPlanID == BusinessPlanID);
                }

                if (CategoryID != 0)
                {
                    query = query.Where(p => p.InitiativesCategoryID == CategoryID);
                }

                if (StratergicTypeID != 0)
                {
                    query = query.Where(p => p.StratgyTypeID == StratergicTypeID);
                }

                if (OsoId != 0)
                {
                    query = query.Where(p => p.RelatedOsoOrMarketID == OsoId);
                }

                if (StatusID != 0)
                {
                    query = query.Where(p => p.ProcessStagesID == StatusID);
                }



                var fetchedresult = query.ToList().Select(t => new
                    {
                        INITIATIVETITLE = (t.InitiativeTitle),
                        TARGETVALUE = (t.TargetValue),
                        TARGETDESCRIPTION = (t.TargetDescription),
                        FROMDATE = (t.FromDate),
                        TODATE = (t.ToDate),
                        EXPECTEDINCREMENTALBUSINESS = (t.ExpectedIncrementalBusiness),
                        REQUESTEDBUDGETBYOSO = (t.RequestedBudgetByOSO),
                        APPROVEDBUDGET = (t.ApprovedBudget),
                        InitiativesPkID = (t.InitiativesPkID),
                        KpiWeightage = (t.KpiWeight),
                        InitiativeCAtegory = (db.MstrInitiativeCategories.Where(x => x.InitiativeCategoryPkID == t.InitiativesCategoryID).FirstOrDefault().InitiativeCategoryName),
                        Status = (db.MstrProcessStages.Where(x => x.MstrProcessStagesPkID == t.ProcessStagesID).FirstOrDefault().StagesName),
                        StratergyType = (db.MstrStratergicTypes.Where(x => x.StratergicTypeID == t.StratgyTypeID).FirstOrDefault().StratergicName),
                        Businessplan = (db.BusinessPlans.Where(x => x.BusinessPlanPkID == t.BusinessPlanID).FirstOrDefault().BusinessPlanName),
                        OsoName = (db.MstrOSoOfficesMarkets.Where(x => x.OSOOfficesMarketsPkID == t.RelatedOsoOrMarketID).FirstOrDefault().Name),
                        OsoNameID = t.RelatedOsoOrMarketID
                    });

                GV_List.CurrentPageIndex = 0;
               
                GV_List.DataSource = fetchedresult;
               
                Cache["GridsearchDataSource"] = fetchedresult;
                GV_List.DataBind();