pt_car_message.cs

此系统开发了一个公交车管理系统。系统根据权限的不同

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


namespace CarManage
{
    public partial class PT_Car_Message : Form
    {
        public PT_Car_Message()
        {
            InitializeComponent();
        }

        private void label19_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string sqlstr = "select car_number as 车牌号,car_buytime as 购买时间,car_rank as 品牌,car_fee as 养路费,car_insurance as 保险费,car_remark as 备注 from db_car where 1 = 1 ";
            //定义变量
            string CheckCarKinds = this.textCheckCarKinds.Text.ToString().Trim();
            string CheckCarNumber = this.textCheckCarNumber.Text.ToString().Trim();
            DateTime CheckBuyTime = Convert.ToDateTime(this.dateTimeCheckBuyTime.Value);
            //调用config配置文件对象dl连接对象
            string dl = ConfigurationManager.AppSettings["sqlString"];
            //创建connection对象con进行连接
            SqlConnection con = new SqlConnection(dl);
            //打开连接
            con.Open();
            if (CheckCarNumber != "")
            {
                sqlstr = sqlstr + " and  car_number = '" + CheckCarNumber + "'";

            }
            if (dateTimeCheckBuyTime.Checked)
            {
                sqlstr = sqlstr + " and  car_buytime= '" + CheckBuyTime + "'";

            }
            if (CheckCarKinds != "")
            {
                sqlstr = sqlstr + "and car_rank = '" + CheckCarKinds + "'";
            }
            SqlCommand cmd = new SqlCommand(sqlstr, con);
            //创建读取器对象sdr
            SqlDataAdapter sdr = new SqlDataAdapter();
            //sdr的查询方法为cmd
            sdr.SelectCommand = cmd;
            //创建一个dataset容器
            DataSet ds = new DataSet();
            //填充数据ds
            sdr.Fill(ds);
            //绑定datagriview数据源为ds
            this.dataGridView1.DataSource = ds.Tables[0].DefaultView;
            //关闭连接
            con.Close();
            dataGridView1.Columns[0].Width = 75;
            dataGridView1.Columns[1].Width = 100;
            dataGridView1.Columns[2].Width = 70;
            dataGridView1.Columns[3].Width = 70;
            dataGridView1.Columns[4].Width = 70;
            dataGridView1.Columns[5].Width = 150;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.textCheckCarNumber.Clear();
            this.textCheckCarKinds.Clear();
        }

        private void label3_Click(object sender, EventArgs e)
        {
            this.Close();
        }

    }
}