Linq - Boolean - where 语句

Question

我正在努力解决以下代码。

var q = from hed in cxt.SOPOrderReturns.ToExpandable()
        join cus in cxt.SLCustomerAccounts 
              on hed.CustomerID equals cus.SLCustomerAccountID
        join ad in cxt.SOPDocDelAddresses 
              on hed.SOPOrderReturnID equals ad.SOPOrderReturnID
        where hed.AnalysisCode1 == "SO"
        select new
        {
            hed.SOPOrderReturnID,
            hed.DocumentNo,
            hed.DocumentDate,
            cus.CustomerAccountNumber,
            Route = hed.AnalysisCode2,
            Drop = hed.AnalysisCode5,
            hed.ReadyForInvoicePrint,
        };

q = q.RemoveExpandable();

return q;

列 hed.ReadyForInvoicePrint 是布尔值，我想添加一个 where 语句，该语句还显示该列是否为 FALSE。

谢谢

杰米

Answer 1

您可以通过将&& !hed.ReadyForInvoicePrint 添加到您的where 语句来过滤此列的false 值。

Answer 2

根据您的要求，我相信您希望能够查询多个参数。您可以简单地添加一个变量来执行此操作。

var q = from hed in cxt.SOPOrderReturns.ToExpandable()
var someVar = true | false;
join cus in cxt.SLCustomerAccounts on hed.CustomerID equals 
cus.SLCustomerAccountID
join ad in cxt.SOPDocDelAddresses on hed.SOPOrderReturnID equals 
ad.SOPOrderReturnID
where hed.AnalysisCode1 == "SO" && hed.ReadyForInvoicePrint == someVar

select new
{
hed.SOPOrderReturnID,
hed.DocumentNo,
hed.DocumentDate,
cus.CustomerAccountNumber,
Route = hed.AnalysisCode2,
Drop = hed.AnalysisCode5,
hed.ReadyForInvoicePrint,

};

q = q.RemoveExpandable();

return q;

或者，您可以将查询包装到 IQueryable where 子句可以在以后有条件地添加到您的代码中。

private IQueriable<SOPOrderReturns> GetSOPOrderReturnsQuery(){
var q = from hed in cxt.SOPOrderReturns.ToExpandable()
join cus in cxt.SLCustomerAccounts on hed.CustomerID equals 
cus.SLCustomerAccountID
join ad in cxt.SOPDocDelAddresses on hed.SOPOrderReturnID equals 
ad.SOPOrderReturnID

select new
{
hed.SOPOrderReturnID,
hed.DocumentNo,
hed.DocumentDate,
cus.CustomerAccountNumber,
Route = hed.AnalysisCode2,
Drop = hed.AnalysisCode5,
hed.ReadyForInvoicePrint,

};

q = q.RemoveExpandable();

return q.AsQueryable();
}

获取查询并进行更改

var query = GetSOPOrderReturnsQuery();
query = query.Where(x=>x.AnalysisCode1 == "SO");
query = query.Where(x=>x.ReadyForInvoicePrint == false);

希望这会有所帮助。