/** * @ 默认构造函数 * @connectionString 数据库连接字符串 * */ protected SQLHelper(SQLDataBaseType dbType, string connectionString) : this(new SQLContext(dbType, connectionString)) { }
/** * @ 构造函数第一次重载,自动构造数据连接对象 * @ dbType 数据库类型 * @ connectionString 数据库连接字符串 * */ public SQLContext(SQLDataBaseType dbType, string connectionString) { this.dbType = dbType; this.connectionString = connectionString; }