七、流水查询---记录用户登录信息

一、数据库的建立

在fiber_yy数据库下创建yy_user_record表
在这里插入图片描述

可以先手动填入几条数据信息

初始数据库信息
username为用户账号
sex为用户注册所填写的性别
phone为用户手机号
time为用户登录该系统的时间
在这里插入图片描述

二、页面的设计

登录注册页面我就不演示了，前几篇博文也都有介绍

flow_query流水查询页面
在这里插入图片描述

三、代码实现

flow_query流水查询页面

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;
namespace fiber_yy
{public partial class flow_query : Form{private DataSet dsall;public string constr = "server=CY-20190824RMES;Initial Catalog=fiber_yy;User ID=sa;pwd=beyond";private SqlDataAdapter mDataAdapter;public flow_query(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){try{SqlConnection conn = new SqlConnection(constr);conn = new SqlConnection(constr);mDataAdapter = new SqlDataAdapter("SELECT username AS '用户',sex AS '性别',phone AS '手机号',time AS '登录时间' FROM yy_user_record", conn);dsall = new DataSet();mDataAdapter.Fill(dsall, "hard");MessageBox.Show(dsall.ToString());dataGridView1.DataSource = dsall.Tables["hard"];}catch{MessageBox.Show("读取失败");}}private void button2_Click(object sender, EventArgs e){string account = textBox1.Text;try{SqlConnection conn = new SqlConnection(constr);conn = new SqlConnection(constr);//mDataAdapter = new SqlDataAdapter("SELECT username AS '用户',sex AS '性别',phone AS '手机号',time AS '登录时间' FROM yy_user_record WHERE username='" + account + "'", conn);mDataAdapter = new SqlDataAdapter("SELECT username AS '用户',sex AS '性别',phone AS '手机号',time AS '登录时间' FROM yy_user_record WHERE username='" + account + "'", conn);dsall = new DataSet();mDataAdapter.Fill(dsall, "hard");dataGridView1.DataSource = dsall.Tables["hard"];}catch{MessageBox.Show("读取失败");}}}
}