ILock.RefreshLock Method  IT Hit WebDAV for .NET

Updates lock timeout information on this item.

Parameters

lockInfo

Describes a lock on this item.

Return Value

• OkResponse - the lock timeout information was successfully updated.
• PreconditionFailedResponse - the included lock token was not enforceable on this item.

Remarks

WebDAV engine passes LockInfo structure to this method by reference. Token and Timeout fields are provided by WebDAV client. In your RefreshLock implementation you must set Shared, Deep and Owner fields.

Example

        public WebDAVResponse RefreshLock(ref LockInfo lockInfo)
        {
            LockInfo[] locks = ActiveLocks;

            int lockIndex;
            for(int lockIndex = 0; lockIndex < locks.Length; lockIndex++)
                if(lockInfo.Token == locks[lockIndex].Token) break;

            if(lockIndex == locks.Length)
                return new PreconditionFailedResponse();

            SqlConnection conn = new SqlConnection(connStr);
            SqlCommand cmd;
            conn.Open();

            try
            {
                cmd = conn.CreateCommand();
                cmd.CommandText = "UPDATE Lock SET Expires = @Expires WHERE Token LIKE @Token";
                
                cmd.Parameters.Add("@Expires", SqlDbType.DateTime);
                if(lockInfo.Timeout >= 0)
                {
                    cmd.Parameters["@Expires"].Value = DateTime.Now.AddSeconds(lockInfo.Timeout);
                }
                else
                {
                    cmd.Parameters["@Expires"].Value = SqlBoolean.Null;
                }
                cmd.Parameters.Add("@Token", SqlDbType.Char).Value = lockInfo.Token;

                cmd.ExecuteNonQuery();
            }
            finally
            {
                conn.Close();
            }
            
            // return info about lock to WebDAV engine
            lockInfo.Shared = locks[lockIndex].Shared;
            lockInfo.Deep = locks[lockIndex].Deep;
            lockInfo.Owner = locks[lockIndex].Owner;

            return new OkResponse();
        }
 

See Also

ILock Interface | ITHit.WebDAV.Server Namespace

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