学习Unity3D之VS代码对数据库进行增、删、改、查数据。

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class Program

    {

        List<Users> list = new List<Users>();

        public List<Users> select() {

            SqlConnection con = new SqlConnection("server=.;database=GameMarket;Trusted_Connection=SSPI");

            con.Open();

            string sql = "select * from users";

            SqlCommand sc = new SqlCommand(sql, con);

            SqlDataReader reader = sc.ExecuteReader();

            while (reader.Read()) {

                Users u = new Users();

                u.Id =(int) reader.GetValue(0);

                u.Name = (string)reader.GetValue(1);

                list.Add(u);

            }

            return list;

        }
2、插入方法构建：

        public int insert(string name)

        {

            SqlConnection con = new SqlConnection("server=.;database=GameMarket;Trusted_Connection=SSPI");

            con.Open();

            string sql = "insert into users values('"+name+"')";

            SqlCommand sc = new SqlCommand(sql, con);

            int i=sc.ExecuteNonQuery();

            return i;

        }
3、更新方法：

        public int update(int id,string name)

        {

            SqlConnection con = new SqlConnection("server=.;database=GameMarket;Trusted_Connection=SSPI");

            con.Open();

            string sql = "update users set name='"+name+"' where id="+id+"";

            SqlCommand sc = new SqlCommand(sql, con);

            int i = sc.ExecuteNonQuery();

            return i;

        }
4、删除方法：

        public int delete(int id)

        {

            SqlConnection con = new SqlConnection("server=.;database=GameMarket;Trusted_Connection=SSPI");

            con.Open();

            string sql = "delete from users where id="+id+"";

            SqlCommand sc = new SqlCommand(sql, con);

            int i = sc.ExecuteNonQuery();

            return i;

        }

        static void Main(string[] args)

        {

        }

    }