MySQL GRANT to User@'host' not behaving as expected

EDIT: I reinstalled MySQL and this fixed itself. No idea what the issue was.

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I ran the following commands in MySQL from the command line:

1. REVOKE ALL PRIVILEGES ON MyDB.* FROM user@'%';
2. DROP USER user@'%";
3. GRANT INSERT,SELECT,DELETE,UPDATE ON MyDB.* TO user@'%' IDENTIFIED BY '开发者_如何学编程somepassword';
4. FLUSH PRIVILEGES;

The grants for the user are:

GRANT USAGE ON . to 'user'@'%' IDENTIFIED BY PASSWORD GRANT SELECT,INSERT,UPDATE,DELETE ON 'MyDB'.* TO 'user'@'%'

But then I get the following error message when I try to do an update.

UPDATE command denied to user 'user'@'somehost' for table 'sometable'

Relevant info:

SELECT,INSERT, and DELETE all work properly.

I am using C# with Connector/NET

'somehost' is on the same network as the server (different computer).

'sometable' is in MyDB.

If I log in to the server with 'user' on the host machine, update queries work just fine.

EDIT:

If I grant UPDATE,SELECT,INSERT,DELETE to user@'somehost.net', UPDATE queries work without a problem.

Any ideas?

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After taking away all the grants, first you should give the usage privilege to the user.

GRANT USAGE on MyDB.* to 'user'@'localhost'

Usage privilege tells the server that this user is allowed to use MySQL

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Reinstalling fixed the issue. Not sure what the problem was.