Question

Basically I need to check if a table is locked from my code.

I know if I run this directly on the DB;

SELECT * FROM 'tablename' SET LOCK_TIMEOUT 0

I can get an immediate error if a table is locked or none if it isn’t. However when I call this statement from my code it still seems to wait for a period of time for the lock to be released before returning. The code I’m using to call this query is;

SqlConnection conn = new SqlConnection(@"ConnectionString");
using(conn)
{
    conn.Open();
    var query = new SqlCommand("SELECT * FROM tablename SET LOCK_TIMEOUT 0", conn);

    try
    {
        SqlDataReader reader = query.ExecuteReader();
        // No lock
    }catch (Exception)
    {
        // Deal with lock exception
    }
} 

I’d like to know straight away. Any suggestions? Or any better ways of doing this?

Answer 1

It’s not clear what goal you are trying to achieve, and for what purpose, but you are setting the lock timeout after the SELECT, whereas you need to set it before.