3
我正在嘗試針對某些實體（EF4，如果這有什麼區別）構建一個簡單的搜索。傳入我的搜索查詢是一個標準對象列表。該crieteria對象看起來是這樣的：在Linq中追加或子查詢
public class ClaimSearchCirtieria
{
public Guid? FinancialYear { get; set; }
public bool AllClaimants { get; set; }
public IList<Guid> ClaimantIds { get; set; }
public bool AllExpenseCategories { get; set; }
public IList<ExpenseCategoryAndTypeCriteria> EpenseCategoryAndTypes { get; set; }
}
而且ExpenseCategoryAndTypeCriteria
public class ExpenseCategoryAndTypeCriteria
{
public Guid ExpenseCategory { get; set; }
public bool AllTypesInCatgeory { get; set; }
public IList<Guid> ExpenseTypes { get; set; }
}
搜索財政年，申請人需要有一個與查詢，然後我需要的費用類別，費用類型被追加爲OR子查詢。
在本質上我試圖做的事：
select *
from claims
where <financial year> AND <Claimants> AND (expense type 1 OR expense type 2 or expense category X)
到目前爲止，我有這樣的：
public PagedSearchResult<Claim> Search(ClaimSearchCirtieria searchCriteria, int page, int pageSize)
{
var query = All();
if (searchCriteria.FinancialYear.HasValue)
{
query = from claim in query
where claim.FinancialYearId == searchCriteria.FinancialYear
select claim;
}
if (!searchCriteria.AllClaimants)
{
query = from claim in query
where searchCriteria.ClaimantIds.Contains(claim.ClaimantId)
select claim;
}
if (!searchCriteria.AllExpenseCategories)
{
foreach (var item in searchCriteria.EpenseCategoryAndTypes)
{
if (item.AllTypesInCatgeory)
{
//Just search on the category
query = query.Where(claim =>
(from transaction in claim.ClaimTransactions
where item.ExpenseCategory == transaction.ExpenseType.ExpenseCategoryId
select transaction).Count() > 0
);
}
else
{
//Search for the specified types
query = query.Where(claim =>
(from transaction in claim.ClaimTransactions
where item.ExpenseTypes.Contains(transaction.ExpenseTypeId)
select transaction).Count() > 0
);
}
}
}
return PagedSearchResult<Claim>.Build(query, pageSize, page);
}
什麼我目前看到的是，最後一次請求的費用類別是隻有費用類別我獲得結果。另外，看代碼，它看起來像我期望這是建立一系列的AND查詢，而不是所需的OR。
任何指針？