代码生成器的关键代码（读取数据库）

public class DataAccessbase
    {
        SqlConnection MyConnection = null;
        public DataAccessbase(string connectionString)
        {
            MyConnection = new SqlConnection(connectionString);
            if (MyConnection.State == ConnectionState.Closed)
            {
                MyConnection.Open();
            }
        }

        /// <summary>
        /// 获取数据库中所有表名称
        /// </summary>
        /// <returns></returns>
        public List<DataBaseInfo> GetAllTable()
        {
            DataTable dt = MyConnection.GetSchema("Tables");
            List<DataBaseInfo> list = new List<DataBaseInfo>();
            foreach (DataRow dr in dt.Rows)
            {
                DataBaseInfo entity = new DataBaseInfo();
                entity.TableName = (String)dr["TABLE_NAME"];
                list.Add(entity);
            }
            return list; 
        }

        public List<TableInfo> GetColumnName(string tableName)
        {
            string sql = "Select * From " + tableName;
            SqlCommand MyCommand = new SqlCommand(sql, MyConnection);
            SqlDataReader MyReader = MyCommand.ExecuteReader();
            DataTable MyTable = MyReader.GetSchemaTable();
            int MyCount = 1;

            List<TableInfo> list = new List<TableInfo>();
            foreach (DataRow MyRow in MyTable.Rows)
            {
                foreach (DataColumn MyColumn in MyTable.Columns)
                {
                    TableInfo entity = new TableInfo();
                    entity.ColumnName = MyColumn.ColumnName.ToString();
                    entity.ColumnType = MyColumn.DataType.ToString();
                    list.Add(entity);
                }
                MyCount++;
            }
            MyReader.Close();
            return list;

        }

        public void ClostConn()
        {
            MyConnection.Close();
        }

        public void DisposeConn()
        {
            MyConnection.Dispose();
        }

    }