IEnumerable上的动态LINQ? [英] Dynamic LINQ on IEnumerable?

问题描述

说我需要使用动态查询(List<string> l; var x = l.Where(*dynamic query*))过滤通用列表

Say i need to filter a generic list with a dynamic query (List<string> l; var x = l.Where(*dynamic query*))

我将如何使用LINQ做到这一点? (当前在数据视图上使用行过滤器)

How would i do this using LINQ? (Currently using a row filter on a dataview)

我看过

I've seen a posting by scott g: but it appears to not work with objects that use IEnumerable (generic lists included)

任何人都可以提供任何想法吗?

Can anyone offer any ideas?

推荐答案

假设您的意思是基于字符串的查询:动态LINQ库可以正常工作；只需先拨打.AsQueryable():

Assuming you mean a string-based query: the dynamic LINQ library will work fine; just call .AsQueryable() first:

string s = *dynamic query*
var qry = l.AsQueryable().Where(s);

这为您提供了列表周围的IQueryable<T>包装器，可用于访问动态LINQ扩展方法.

This gives you an IQueryable<T> wrapper around your list, which provides access to the dynamic LINQ extension methods.

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