前言：
* The Contains method is run on the database, not the c# code above. On the database, Contains maps to SQL LIKE, which is case insensitive.
这句话的意思是Contains()方法，运行在数据库中，而不是C#代码上，在数据库中，Contains就像SQL中的LIKE关键字，它是大小写敏感的。
一：我们来为Index页面添加一个模糊查询，在控制器中找到Index方法，修改如下：
1 public ActionResult Index(string searchString) 2 { 3 4 var movies = from m in db.Movies select m; 5 6 if (!string.IsNullOrEmpty(searchString)) 7 { 8 movies = movies.Where(s => s.Title.Contains(searchString)); 9 } 10 return View(movies); 11 }
执行完
var movies = from m in db.Movies select m;
这句代码之后，我们侦听到movies执行的SQL语句为：
1 SELECT 2 [Extent1].[ID] AS [ID], 3 [Extent1].[Title] AS [Title], 4 [Extent1].[ReleaseDate] AS [ReleaseDate], 5 [Extent1].[Genre] AS [Genre], 6 [Extent1].[Price] AS [Price] 7 FROM [dbo].[Movies] AS [Extent1]
执行完这句之后 movies的SQL语句为：
1 SELECT 2 [Extent1].[ID] AS [ID], 3 [Extent1].[Title] AS [Title], 4 [Extent1].[ReleaseDate] AS [ReleaseDate], 5 [Extent1].[Genre] AS [Genre], 6 [Extent1].[Price] AS [Price] 7 FROM [dbo].[Movies] AS [Extent1] 8 WHERE [Extent1].[Title] LIKE @p__linq__0 ESCAPE N‘~‘
可以看得出来，Contains方法，生成了Like后面的语句。
原文：http://www.cnblogs.com/caofangsheng/p/4590974.html