[大数据]C#数据库连接

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Reflection;


namespace Project
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //Data Source = . 表示本地连接
            //Initial Catalog = Emp 需要连接的数据库
            //Integrated Security = True 表示使用Windows 方式验证
            String serv = "Data Source=.;Initial Catalog=Emp;Integrated Security=True;";
            SqlConnection conn = new SqlConnection(serv);
            try
            {
                conn.Open();
                MessageBox.Show("连接成功");
            }
            catch (Exception ex)
            {
                MessageBox.Show("连接失败" + ex.Message);
            }
            finally {
                if (conn != null) {
                    conn.Close();
                }
            }
        }
    }
}