c#程序中，前台数据怎样和数据库相连接？

Question

求解答 真心谢谢 希望高手帮忙解答

Answer 1

Ajax啊....从后台读了数据后，然后绑定到页面上就ok了。

Answer 2

  public void getcon()
        {
            try
            {
                string sql_str =ConfigurationManager.ConnectionStrings["sqlcon"].ConnectionString.ToString();//.从配置文件读；
                con = new SqlConnection(sql_str);
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
            }
            catch (Exception ee)
            {
                throw ee;
            }
        }
  //返回SQL结果集
        public DataSet DataSetSQL(string sql)
        {
            try
            {
                getcon();
                sda = new SqlDataAdapter(sql, con);
                ds = new DataSet();
                sda.Fill(ds);
                con.Close();
                return ds;
            }
            catch (Exception ee)
            {
                throw ee;
            }
        }

Answer 3

winform 还是webform 啊 研究下 sqlconnection datatable sqldatareader ado.net ，或者 sqlhelper