C#学习笔记---数据库连接与异常

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            SqlConnection sqlcon = new SqlConnection("Data Source= (local);DataBase = Theatre_MS;uid =sa;pwd = 123;");
            try
            {
                sqlcon.Open();//数据库需要打开
                string sqlstr = "insert into User_TB values(‘1‘,‘2‘,‘1‘);";
                SqlCommand cmd = new SqlCommand(sqlstr,sqlcon);//须记住cmd的new时需要两个参数，一个是sqlstr，一个是数据库连接---->用来表明是对那个数据库进行那种操作
                cmd.ExecuteNonQuery();//executeNonQuery返回是得影响的行数
                Console.WriteLine("Yes!");


            }
            catch (SqlException ex)
            {
                Console.WriteLine(ex.Message);//输出得是ex。Message

            }
            Console.ReadLine();

        }
    }
}