Entity Framework - case insensitive Contains?

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离开以前
离开以前 2021-01-03 17:39

I want a solution to this problem that does not involve ToUpper or ToLower, as I use in the code below;

var upper = term.ToUpper();
using (var db = this.Data         


        
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  •  挽巷
    挽巷 (楼主)
    2021-01-03 18:07

    I know that this is not related directly to EF, but only solution I can think of is to alter DB table column collation to be Case Insensitive e.g.:

    ALTER TABLE TABLENAME ALTER COLUMN COLUMNNAME nvarchar(100) COLLATE Latin1_General_CI_AS NULL
    

    CI - case insensitive / CS - case sensitive

    AS - accent sensitive / AI - accent insensitive (can also be useful)

    If you can't change collation of table column you can use direct query from EF with forcing collation

    select * 
    from table
    where country collate Latin1_General_CI_AS != @country
    

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