判斷是否日期的函數

本例是依據LINQ to SQL Equivalent of ISDATE() 套用原處
CREATE FUNCTION My_ISDATE(@maybeDate varchar(max))
returns bit
as return ISDATE(@maybeDate);

------
var db = SomeDataContext;
var query = from p in db.MyTable
where db.My_ISDATE(p.field1)
select p;