标签:Like EF System Entity Framework Operator Data
Like Operator in Entity Framework?
回答1
This is an old post now, but for anyone looking for the answer, this link should help. Go to this answer if you are already using EF 6.2.x. To this answer if you're using EF Core 2.x
Short version:
SqlFunctions.PatIndex method - returns the starting position of the first occurrence of a pattern in a specified expression, or zeros if the pattern is not found, on all valid text and character data types
Namespace: System.Data.Objects.SqlClient Assembly: System.Data.Entity (in System.Data.Entity.dll)
A bit of an explanation also appears in this forum thread.
回答2
There is LIKE
operator is added in Entity Framework Core 2.0
:
var query = from e in _context.Employees
where EF.Functions.Like(e.Title, "%developer%")
select e;
Comparing to ... where e.Title.Contains("developer") ...
it is really translated to SQL
LIKE
rather than CHARINDEX
we see for Contains
method.
回答3
Update: In EF 6.2 there is a like operator
Where(obj => DbFunctions.Like(obj.Column , "%expression%"))
标签:Like,EF,System,Entity,Framework,Operator,Data 来源: https://www.cnblogs.com/chucklu/p/16695805.html
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