3
我正在尝试针对某些实体（EF4，如果这有什么区别）构建一个简单的搜索。传入我的搜索查询是一个标准对象列表。该crieteria对象看起来是这样的：在Linq中追加或子查询
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; }
}
搜索财政年，申请人需要有一个与查询，然后我需要的费用类别，费用类型被追加为OR子查询。
在本质上我试图做的事：
select *
from claims
where <financial year> AND <Claimants> AND (expense type 1 OR expense type 2 or expense category X)
到目前为止，我有这样的：
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);
}
什么我目前看到的是，最后一次请求的费用类别是只有费用类别我获得结果。另外，看代码，它看起来像我期望这是建立一系列的AND查询，而不是所需的OR。
任何指针？