c# sql command基本用法 C#中SQL Command的基本用法

using System;
using System.Data.SqlClient;
namespace CommandDemo
{
  class Program
  {
    static void Main(string[] args)
    {
      //创建数据库
      string constr = "Server = .; user=name;pwd=mima;database=mysql";
      SqlConnection myCon = new SqlConnection(constr);
      try
      {
        myCon.Open();
        /*创建一个表
        string sql = "select * form mytable01";
        SqlCommand myCom = new SqlCommand(sql, myCon);
        myCom.CommandTimeout = 2; //出错的等待时间，2s内没有成功就认为出错了 
        Console.WriteLine("创建对象成功");*/
        /*-------更改数据 ExcuteNonquery 插入语句举例----------
        myCon.Open();
        //添加数据
        string sql = "insert mytable01(name,gender,age,department)values('姓名'，'男'，35,'部门')";
        SqlCommand myCom = new SqlCommand(sql, myCon);
        myCom.ExecuteNonQuery();
        Console.WriteLine("去数据库查看，已完成");
        */
        //ExcuteScalar  获得最大值举例
        myCon.Open();
        string sql = "select max(age) from mytable01";
        SqlCommand myCom = new SqlCommand(sql,myCon);
        Console.WriteLine("年龄最大的是："+myCom.ExecuteScalar()+"岁");
      }
      catch(Exception ex)
      {
        Console.WriteLine(ex.Message.ToString());
      }
      finally
      {
        myCon.Close();
      }
      Console.Read();
    }
  }
}