Linq訂單由同一字段不同的值

Question

我有這個查詢：

investorData = from investor in db.Investors
               join loanapp in db.LoanApplications on investor.FundID equals loanapp.FundID into loanAppData
               from lapp in loanAppData.DefaultIfEmpty()
               join fundreport in db.FundReportLoanDatas on lapp.LoanId equals fundreport.LoanId into fundReportData
               from freport in fundReportData.DefaultIfEmpty()
               where investor.FundID == fundID
               orderby lapp.LoanId descending
               select new InvestorPortfolioVM()
               {
                   InvestorId = investor.InvestorID,
                   CurrentLTV = freport.CurrentLTV == null ? 0.0 : freport.CurrentLTV,
                   LoanId = lapp.LoanId,
                   SegLTV = freport.SegLTV == string.Empty ? "" : freport.SegLTV,
                   BorrowerName = lapp.BorrowerName,
                   LoanStatusId = lapp.LoanStatusId
               };

我現在想要實現的是按一個字段（LoanStatusId）訂購商品，從沒有LoanStatusId為4或8的貸款開始。

知道我該如何實現嗎？

Answer 1

我認為這會做您想要的。

investorData = from investor in db.Investors
               join loanapp in db.LoanApplications on investor.FundID equals loanapp.FundID into loanAppData
               from lapp in loanAppData.DefaultIfEmpty()
               join fundreport in db.FundReportLoanDatas on lapp.LoanId equals fundreport.LoanId into fundReportData
               from freport in fundReportData.DefaultIfEmpty()
               where investor.FundID == fundID
               orderby (lapp.LoanId >= 4 &&  lapp.LoanId <= 8) ? 1 : 0
               select new InvestorPortfolioVM()
               {
                   InvestorId = investor.InvestorID,
                   CurrentLTV = freport.CurrentLTV == null ? 0.0 : freport.CurrentLTV,
                   LoanId = lapp.LoanId,
                   SegLTV = freport.SegLTV == string.Empty ? "" : freport.SegLTV,
                   BorrowerName = lapp.BorrowerName,
                   LoanStatusId = lapp.LoanStatusId
               };