我一直在网上搜索，到目前为止我发现的每个示例都使用相同类型的查询来执行搜索。我发现这是搜索的 hello world 版本。我发现有一些使用 if 语句在几个查询之间进行选择，但仍然缺乏任何真正的能力。
(from c in context.table
where c.contains(searchField)).toList());
搜索非常简单，以至于我无法想出如何为下面的屏幕截图开发搜索查询。复选框组应该创建OR/IN子句，几乎所有其他内容都是AND
例如，用户检查Sarasota，Venice输入 1990 年建成的年份并选择卧室 1+ 并输入销售日期范围from1/1/2000 并将to字段留空。
在普通的旧 SQL 中，这将是。
where city = 'sarasota' or city = 'Venice' AND yearbuilt = 1990 AND bedrooms >= 1 AND fromSaleDate >= 1/1/2000 AND toSaleDate = 12/31/9999
如果我使用的是老派 sql 字符串和 ASP 经典，我会使用硬编码子句和少量ifsandfor语句的组合来自己动态构建查询字符串。
我正在设想某种以某种方式传递值的 searchViewModel（尚未编写）。所以我不能包含该 ViewModel 的代码示例。真正的踢球者是“属性特征”部分。这将是可用属性特性的动态列表，因此不能将其作为查询的一部分进行硬编码。
我认为这可能是相关的，但我不确定。使用 LINQ 过滤列表
请帮助我朝着正确的方向迈出一步。谢谢
更新
这是在 Profiler 中执行的查询。我对其进行了调整以声明变量，以便我可以交互地运行它，但查询本身没有改变
declare @p__linq__0 as datetime
declare @p__linq__1 as datetime
set @p__linq__0='1989-01-01 00:00:00'
set @p__linq__1='1990-01-01 00:00:00'
SELECT TOP (10)
[Project3].[STRAP] AS [STRAP],
[Project3].[SITUS] AS [SITUS],
[Project3].[MAILING_ADDRESS] AS [MAILING_ADDRESS],
[Project3].[PROPERTY_USE] AS [PROPERTY_USE],
[Project3].[SUBDIVISION] AS [SUBDIVISION],
[Project3].[DSCR] AS [DSCR],
[Project3].[LAND_AREA] AS [LAND_AREA],
[Project3].[INCORPORATION] AS [INCORPORATION],
[Project3].[SEC_TWP_RGE] AS [SEC_TWP_RGE],
[Project3].[CENSUS] AS [CENSUS]
FROM ( SELECT [Project3].[STRAP] AS [STRAP], [Project3].[SITUS] AS [SITUS], [Project3].[MAILING_ADDRESS] AS [MAILING_ADDRESS], [Project3].[PROPERTY_USE] AS [PROPERTY_USE], [Project3].[SUBDIVISION] AS [SUBDIVISION], [Project3].[DSCR] AS [DSCR], [Project3].[LAND_AREA] AS [LAND_AREA], [Project3].[INCORPORATION] AS [INCORPORATION], [Project3].[SEC_TWP_RGE] AS [SEC_TWP_RGE], [Project3].[CENSUS] AS [CENSUS], row_number() OVER (ORDER BY [Project3].[STRAP] ASC) AS [row_number]
FROM ( SELECT
[Distinct2].[STRAP] AS [STRAP],
[Distinct2].[SITUS] AS [SITUS],
[Distinct2].[MAILING_ADDRESS] AS [MAILING_ADDRESS],
[Distinct2].[PROPERTY_USE] AS [PROPERTY_USE],
[Distinct2].[SUBDIVISION] AS [SUBDIVISION],
[Distinct2].[DSCR] AS [DSCR],
[Distinct2].[LAND_AREA] AS [LAND_AREA],
[Distinct2].[INCORPORATION] AS [INCORPORATION],
[Distinct2].[SEC_TWP_RGE] AS [SEC_TWP_RGE],
[Distinct2].[CENSUS] AS [CENSUS]
FROM ( SELECT DISTINCT
[Distinct1].[STRAP] AS [STRAP],
[Distinct1].[SITUS] AS [SITUS],
[Distinct1].[MAILING_ADDRESS] AS [MAILING_ADDRESS],
[Distinct1].[PROPERTY_USE] AS [PROPERTY_USE],
[Distinct1].[SUBDIVISION] AS [SUBDIVISION],
[Distinct1].[DSCR] AS [DSCR],
[Distinct1].[LAND_AREA] AS [LAND_AREA],
[Distinct1].[INCORPORATION] AS [INCORPORATION],
[Distinct1].[SEC_TWP_RGE] AS [SEC_TWP_RGE],
[Distinct1].[CENSUS] AS [CENSUS]
FROM (SELECT DISTINCT
[Extent1].[STRAP] AS [STRAP],
[Extent1].[SITUS] AS [SITUS],
[Extent1].[MAILING_ADDRESS] AS [MAILING_ADDRESS],
[Extent1].[PROPERTY_USE] AS [PROPERTY_USE],
[Extent1].[SUBDIVISION] AS [SUBDIVISION],
[Extent1].[DSCR] AS [DSCR],
[Extent1].[LAND_AREA] AS [LAND_AREA],
[Extent1].[INCORPORATION] AS [INCORPORATION],
[Extent1].[SEC_TWP_RGE] AS [SEC_TWP_RGE],
[Extent1].[CENSUS] AS [CENSUS]
FROM [dbo].[Properties] AS [Extent1]
INNER JOIN [dbo].[Transfers] AS [Extent2] ON [Extent1].[STRAP] = [Extent2].[STRAP]
WHERE CAST( [Extent2].[TRANS_DATE] AS datetime2) >= @p__linq__0 ) AS [Distinct1]
INNER JOIN [dbo].[Transfers] AS [Extent3] ON [Distinct1].[STRAP] = [Extent3].[STRAP]
WHERE CAST( [Extent3].[TRANS_DATE] AS datetime2) <= @p__linq__1
) AS [Distinct2]
) AS [Project3]
) AS [Project3]
WHERE [Project3].[row_number] > 0
更新
if (Model == null)
{
Model = new SearchViewModel();
}
TryUpdateModel(Model);
Model.Locations = _service.GetLocations().Select(x => new SelectListItem { Text = x.Value, Value = x.Key }).ToList();
var results = _service.GetProperties();
if (Model.SelectedLocation != null)
results = (from r in results
where r.SITUS.ToLower().Contains(Model.SelectedLocation.ToLower())
select r);
if (Model.ParcelID != null)
results = (from r in results
where r.STRAP.StartsWith(Model.ParcelID.Replace("-", "")) || r.STRAP.Equals(Model.ParcelID.Replace("-", ""))
select r);
if (Model.SqftFrom != null)
results = (from r in results
from b in r.Buildings
where b.GROSS_AREA >= Model.SqftFrom
select r).Distinct();
if (Model.SqftTo != null)
results = (from r in results
from b in r.Buildings
where b.GROSS_AREA <= Model.SqftTo
select r).Distinct();
if (Model.Bedrooms != null)
results = (from r in results
from b in r.Buildings
from s in b.StructuralElements
where s.VALUE == Model.Bedrooms && s.DSCR.ToLower() == "bedrooms"
select r).Distinct();
if (Model.Bathrooms != null)
results = (from r in results
from b in r.Buildings
from s in b.StructuralElements
where s.VALUE == Model.Bathrooms && s.CATEGORY == "BT"
select r).Distinct();
if (Model.SaleAmountFrom != null)
results = (from r in results
from t in r.Transfers
where t.AMOUNT >= Model.SaleAmountFrom
select r).Distinct();
if (Model.SaleAmountTo != null)
results = (from r in results
from t in r.Transfers
where t.AMOUNT <= Model.SaleAmountTo
select r).Distinct();
if (Model.SalesFrom != null)
results = (from r in results
from t in r.Transfers
where t.TRANS_DATE >= Model.SalesFrom
select r).Distinct();
if (Model.SalesTo != null)
results = (from r in results
from t in r.Transfers
where t.TRANS_DATE <= Model.SalesTo
select r).Distinct();
//if (Model.SalesTo != null)
// results = (from r in results
// from t in r.Transfers
// where t.TRANS_DATE <= Model.SalesTo
// select r).Distinct();
results = results.OrderBy(x => x.STRAP);
Model.SearchResults = results.ToPagedList(page ??1 , size ?? 10);
if (Model.SearchResults.Count() == 1)
{
var strap = Model.SearchResults.FirstOrDefault().STRAP;
return RedirectToRoute("Details", new { id = strap });
}
else
{
return View(Model);
}