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我必須在我的程序中顯示每行一個帳單中的一行,但一個帳單有多個子帳單。我想從一個DataGridView中的兩個表中分組信息。 1行必須顯示關於所有子賬單的分組信息。 只有2列比其他更復雜:「描述」和「總和」。 「描述」必須包含所有子賬單的描述,並以換行符分隔。我做了下一步:如何縮短linq查詢?
var documentQuery = (from doc in entities.Bas_DocumentData
select new
{
DocumentNum = doc.DocumentNum,
DocumentDate = doc.DocumentDate,
Description = doc.Bas_BonusData.Select(t => t.Description),
BillsCount = doc.Bas_BonusData.Count,
SupplierNum = doc.Bas_BonusData.Select(cred => cred.SupplierNum).FirstOrDefault(),
Debitor = doc.Bas_BonusData.Select(deb => deb.DebitorNum).FirstOrDefault(),
Manager = doc.Bas_BonusData.Select(manager => manager.ManagerName).FirstOrDefault(),
SupplierName = doc.Bas_BonusData.Select(supp => supp.SupplierName).FirstOrDefault(),
Sum = doc.Bas_BonusData.Sum(bill => bill.Price),
IsPrinted = doc.isPrinted,
IsSent = doc.isSent,
NotSummarize = doc.NotSummarize
}).OrderBy(key => key.DocumentNum)
.ToList()
.Select(q => new AcceptedBonusProjection
{
DocumentNum = q.DocumentNum,
DocumentDate = q.DocumentDate,
Description = String.Join("\n\r", q.Description.ToArray()),
BillsCount = q.BillsCount,
SupplierNum = q.SupplierNum,
Debitor = q.Debitor,
Manager = q.Manager,
SupplierName = q.SupplierName,
Sum = q.Sum,
IsPrinted = q.IsPrinted,
IsSent = q.IsSent,
NotSummarize = q.NotSummarize
});
有沒有更好的方法來實現我的目標?我可以通過哪種方式縮短此查詢?
謝謝。信息對我很有用。我將使用SQL-View來實現我的目標。 – Drac