How to equal two strings case sensitively in Linq to SQL?

问题

How to equal two strings case sensitively in Linq to SQL (in a where query)?

Thanks.

回答1:

You cannot do it solely within LINQ to SQL. From the documentation:

Unsupported System.String Methods in General

Queries do not account for SQL Server collations that might be in effect on the server, and therefore will provide culture-sensitive, case-insensitive comparisons by default. This behavior differs from the default, case-sensitive semantics of the .NET Framework.

The way to do it is in your own query where you specify the collation:

Select...
From Table
Where Column = "Value" COLLATE SQL_Latin1_General_CP1_CS_AS

Note that the collation I'm providing specifies a case-sensitive match (CS).

回答2:

You'll have to make the field in question case-sensitive in SQL Server (or whatever DBMS you use). If you use SQL Server, look for the Collation field property, in there you can set case sensitivity.

回答3:

How to equal two strings case sensitively in Linq to SQL (in a where query)?

Select * from tblemp Where empname='nAveen' COLLATE SQL_Latin1_General_Cp1_CS_AS

来源：https://stackoverflow.com/questions/2600932/how-to-equal-two-strings-case-sensitively-in-linq-to-sql