学习Unity3D之VS代码对数据库进行增、删、改、查数据。

来源：互联网发布：光环大数据贴吧编辑：程序博客网时间：2024/06/08 04:07

欢迎来到unity学习、unity培训、unity企业培训教育专区，这里有很多U3D资源、U3D培训视频、U3D教程、U3D常见问题、U3D项目源码，我们致力于打造业内unity3d培训、学习第一品牌1、查询登陆:
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)
        {
        }
    }

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