抽象工厂
/// <summary>
/// DBFactory是产生操作数据库相关对象的抽象工厂，可以产生数据库联接、数据库命令、数据适配器
/// </summary>
public abstract class DBFactory
{
public abstract IDbConnection GetDBConnection();
public abstract IDbTransaction GetDBTransaction(IsolationLevel LockAction);
public abstract IDbCommand GetDBCommand();
public abstract IDbCommand GetDBCommand(string cmdText,IDbConnection conn);
public abstract IDbDataAdapter GetDataAdapter(IDbCommand dbc);
public abstract IDbDataAdapter GetDataAdapter();
public abstract IDbDataParameter GetParameter();
public abstract IDbDataParameter GetParameter(string ParameterName,DbType dbtype);
public abstract IDataReader GetDataReader(IDbCommand dbc);
}
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