System. Data. sqlclient. sqlexception: the lock request timeout period has been exceeded.

When you open the sqlserver2008 manager, When you right-click a table in a database, the above error occurs, and the entire opening process is very slow, generally a deadlock.
The solutions found are as follows:

/* -- Process deadlocks to view the current process, or deadlocked process, and automatically kill the dead process. Because it is targeted to death, if there is a deadlock process, you can only view the deadlock process, you can use parameter control, whether there is a deadlock or not, only check the deadlock process -- login build 2004.4 -- * // * -- call the example exec p_lockinfo -- */create proc p_lockinfo @ kill_lock_spid bit = 1, -- whether to kill the deadlock process, 1 kill, 0 only displays @ show_spid_if_nolock bit = 1 -- if there is no deadlock in the process, whether the normal process information is displayed, 1 shows, 0 does not show asdeclare @ count int, @ s nvarchar (1000), @ I intselect id = identity (INT,), flag, process id = spid, thread id = kpid, block process id = blocked, database ID = dbid, database name = db_name (dbid), user id = uid, user name = loginame, accumulated CPU time = CPU, login time = login_time, number of opened transactions = open_tran, process status = status, site name = hostname, application name = program_name, workstation process id = hostprocess, domain name = nt_domain, NIC address = net_addressinto # T from (select flag = 'deadlocked process', spid, kpid,. blocked, dbid, uid, loginame, CPU, login_time, open_tran, status, hostname, program_name, hostprocess, nt_domain, net_address, S1 =. spid, S2 = 0 from master .. sysprocesses a join (select blocked from master .. sysprocesses group by blocked) B on. spid = B. blocked where. blocked = 0 Union all select '| _ victim _>', spid, kpid, blocked, dbid, uid, loginame, CPU, login_time, open_tran, status, hostname, program_name, hostprocess, nt_domain, net_address, S1 = blocked, S2 = 1 from master .. sysprocesses A where blocked <> 0) A order by S1, s2select @ count =rowcount, @ I = 1if @ COUNT = 0 and @ show_spid_if_nolock = 1 begin insert # T select Sign = 'normal process', spid, kpid, blocked, dbid, db_name (dbid ), UID, loginame, CPU, login_time, open_tran, status, hostname, program_name, hostprocess, nt_domain, net_address from master .. sysprocesses set @ count =rowcountendif @ count> 0 begin create table # T1 (ID int identity (255), a nvarchar (30), B INT, eventinfo nvarchar )) if @ kill_lock_spid = 1 begin declare @ spid varchar (10), @ sign varchar (10) While @ I <= @ count begin select @ spid = process ID, @ flag = flag from # t where id = @ I insert # T1 exec ('dbcc inputbuffer ('+ @ spid + ')') if @ sign = 'deadlocked process' exec ('Kill '+ @ spid) set @ I = @ I + 1 end else while @ I <= @ count begin select @ s = 'dbcc inputbuffer ('+ Cast (process ID as varchar) + ') 'From # t where id = @ I insert # T1 exec (@ s) set @ I = @ I + 1 end select. *, process SQL statement = B. eventinfo from # t a join # t1 B on. id = B. idendgo