class?SqlCeHelper?:?IDisposable
????{
????????private?SqlCeConnection?connection;
????????private?SqlCeCommand?command;
????????private?const?string?connectionString?=?“Data?Source=/DB/db.sdf“;

????????#region?Open/Close
????????public?void?Open（）
????????{
????????????try
????????????{
????????????????connection?=?new?SqlCeConnection（connectionString）;
????????????????command?=?connection.CreateCommand（）;
????????????????command.Connection?=?connection;
????????????????command.CommandType?=?CommandType.Text;

????????????????connection.Open（）;
????????????}
????????????catch?（DataException?e）
????????????{
????????????????Console.WriteLine（e.Message）;
????????????}
????????}

????????public?void?Close（）
????????{
????????????connection.Close（）;
????????????connection.Dispose（）;
????????}

????????public?void?Dispose（）
????????{
????????????connection.Close（）;
????????????connection.Dispose（）;
????????????command.Dispose（）;
????????}
????????#endreg