#coding:utf8
import pymssql

class ConnectMSSQL:
    """
    对pymssql的简单封装
    连接MSSQL时，需要在Sql Server Configuration Manager里面将TCP/IP协议开启
    """

    def __init__(self,host,user,pwd,db):
        self.host = host
        self.user = user
        self.pwd = pwd
        self.db = db

    def __GetConnect(self):
        """
        得到连接信息
        返回: conn.cursor()
        """
        if not self.db:
            raise(NameError,"没有设置数据库信息")
        self.conn = pymssql.connect(host=self.host,user=self.user,password=self.pwd,database=self.db,charset="utf8")
        cur = self.conn.cursor()
        if not cur:
            raise(NameError,"连接数据库失败")
        else:
            return cur

    def ExecQuery(self,sql):
        """
        执行查询语句
        返回的是一个包含tuple的list，list的元素是记录行，tuple的元素是每行记录的字段
        """
        cur = self.__GetConnect()
        cur.execute(sql)
        resList = cur.fetchall()

        #查询完毕后必须关闭连接
        self.conn.close()
        return resList

    def ExecNonQuery(self,sql):
        """
        执行非查询语句
        无返回
        """
        cur = self.__GetConnect()
        cur.execute(sql)
        self.conn.commit()
        self.conn.close()
try:
    ms = ConnectMSSQL(host=".",user="sa",pwd="gaohaibo",db="DevicesMSDB")
except:
    print '连接数据库错误!'