用户生成的规范

Question

I want to let my users create specifications to be executed in a nhibernate.Linq query.

Is it possible? I ask the user to write a query string (HQL I suppose) so it will be serializable and in a combobox the user can apply it to current results

Answer 1

Linq expressions are not serializable.

HQL, on the other hand, is just a string like SQL, so that would work.

But you have to really trust your user, as there is nothing stopping him from typing "DELETE TheMostImportantEntity WHERE 1=1".

Answer 2

另一种选择是使用LINQ动态查询库（请参见此处的详细信息： http : //weblogs.asp.net/scottgu/archive/2008/01/07/dynamic-linq-part-1-using-the-linq- dynamic-query-library.aspx ）