c# 附加数据库

       /// <summary>
        /// 附加数据库
        /// </summary>
        /// <returns></returns>
        private bool Attachdb()
        {
            try
            { 
                string sql = string.Empty;

                if (File.Exists(sMDBFile))
                {
                    sql = "EXEC sp_attach_db   @dbname   =   '" + txtDBName.Text + 
                          "',   @filename1   =   '" + sMDBFile+
                          "',@filename2='" + sLog + "'";
                    SqlConnection conn = new SqlConnection(string.Format("Data Source={0};Initial Catalog=master;User ID={1};PWD={2}","(local)","sa","pwd"));
                    using (conn)
                    {
                        lock (conn)
                        {
                            conn.Open();
                            SqlCommand cmd = new SqlCommand(sql, conn);
                            cmd.ExecuteNonQuery();
                        }
                    }
                }
                return true;
            }
            catch
            {
                return false;
            }
        }

//sMDBFile 为mdf文件路径
//sLog 为ldf文件路径