How to write LINQ which function same as SQL like?

How to write linq with same function of following sql Like:

select * from table where col li开发者_如何学Goke param?

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Table.Where(t => t.col.Contains(param));

...should do the trick.

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From: http://blogs.microsoft.co.il/blogs/bursteg/archive/2007/10/16/linq-to-sql-like-operator.aspx

Digging into System.Data.Linq.SqlClient namespace, I found a little helper class called SqlMethods, which can be very usefull in such scenarios. SqlMethods has a method called Like, that can be used in a Linq to SQL query:

var query = from c in ctx.Customers
            where SqlMethods.Like(c.City, "L_n%")
            select c;

This method gets the string expression to check (the customer's city in this example) and the patterns to test against which is provided in the same way you'd write a LIKE clause in SQL.

Using the above query generated the required SQL statement:

SELECT CustomerID, CompanyName, ...
FROM   dbo.Customers
WHERE  City LIKE [L_n%]

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var selection = records.Where (r => r.Col.Contains (param));

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var item = from SomeCollection where someCondition select I;

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You can use contains clause in Linq which is same as Sql Like. You can find code as following.

var query = from e in emp where e.name.Contains("Mark") select e;