c#vs连接SQL sever数据库入门操作

对于需要连接数据库的项目，可以参考的简单初级代码。实现打开数据库，读入数据功能

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

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

         private void button1_Click(object sender, EventArgs e)
         {
             string Eid = txtID.Text;
             string PName = txtPro.Text;
             string EOut = Money.Text;
             SqlConnection Sql = new SqlConnection();
             Sql.ConnectionString = "server=.;database=风投数据;uid=sa;pwd=123";//根据本机地址，以超级管理员身份进入
             Sql.Open();
             SqlCommand cmd = new SqlCommand();
             cmd.Connection = Sql;
             cmd.CommandType = CommandType.Text;

             cmd.CommandText = "insert into Project values('"+Eid+"',"+PName+","+EOut+")";
             SqlDataReader dr = cmd.ExecuteReader();//执行SQL语句
             dr.Close();//关闭执行
             Sql.Close();//关闭数据库
         }
     }
 }