数据访问----实例2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.SqlClient;
namespace zz
{
    class Program
    {
        public const string CONSTR = "server=.;database=mydb;uid=sa;pwd=111111";
        public static void se()
        {
            SqlConnection con = new SqlConnection(CONSTR);
            con.Open();
            SqlCommand cmd = con.CreateCommand();
            cmd.CommandText = "select * from info";
            SqlDataReader re = cmd.ExecuteReader();
            while (re.Read())
            {
                string code = re["Code"].ToString();
                string name = re["Name"].ToString();
                string sex = ((bool)re["Sex"])?"男":"女";
                string nation = getNation(re["Nation"].ToString());
                string birthday = ((DateTime)re["Birthday"]).ToString("yyyy年MM月dd日");

                Console.WriteLine(code + "	" + name + "	" + sex + "	" + nation + "	" + birthday + "
");
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.WriteLine("**************************个人简历***************************");
                Console.WriteLine(getWork(code));
                Console.ResetColor();
                Console.ForegroundColor = ConsoleColor.Blue;
                Console.WriteLine("**************************家庭情况***************************");
                Console.WriteLine(getFamily(code));
                Console.ResetColor();

            }

            con.Close();

        }
        public static string getNation(string nation)
        {
            string tr = "";
            SqlConnection con = new SqlConnection(CONSTR);
            con.Open();
            SqlCommand cmd = con.CreateCommand();
            cmd.CommandText = "select Name from nation where Code='"+nation+"'";
            SqlDataReader re=cmd.ExecuteReader();
            //if (re.HasRows)
            //{
            //    re.Read();
            //    tr = re["Name"].ToString();
            //}
            //else
            //{
            //    tr = "null";
            //}
            while (re.Read())
            {
                tr = re["Name"].ToString();
            }

            con.Close();

            return tr;
        }
        public static string getWork(string code)
        {
            string tr = "";
            SqlConnection con = new SqlConnection(CONSTR);
            con.Open();
            SqlCommand cmd = con.CreateCommand();
            cmd.CommandText = "select StartDate,EndDate,Firm,Depart from work where InfoCode='" + code + "'";
            SqlDataReader re = cmd.ExecuteReader();
            while (re.Read())
            {
                tr += ((DateTime)re["StartDate"]).ToString("yyyy年MM月dd日") + "	";
                tr += ((DateTime)re["EndDate"]).ToString("yyyy年MM月dd日") + "	";
                tr += re["Firm"].ToString() + "	";
                tr += re["Depart"].ToString() + "
";
            }
            con.Close();
            return tr;
        }
        public static string getFamily(string code)
        {
            string tr = "";
            SqlConnection con = new SqlConnection(CONSTR);
            con.Open();
            SqlCommand cmd = con.CreateCommand();
            cmd.CommandText = "select * from family where InfoCode='" + code + "'";
            SqlDataReader re = cmd.ExecuteReader();
            while (re.Read())
            {
                
                tr += re["Name"].ToString() + "	";
                tr += getTitle(re["title"].ToString()) + "	";
                tr += re["Firm"].ToString() + "
";
              
            }
            con.Close();

            return tr;
        }
        public static string getTitle(string title)
        {
            string tr = "";
            SqlConnection con = new SqlConnection(CONSTR);
            con.Open();
            SqlCommand cmd = con.CreateCommand();
            cmd.CommandText = "select * from title where Code='" + title + "'";
            SqlDataReader re = cmd.ExecuteReader();
            while (re.Read())
            {

                tr += re["Name"].ToString();
            }
            con.Close();
            return tr;
        }
        static void Main(string[] args)
        {
            se();
            Console.ReadKey();
            Main(args);
        }
    }
}