库存管理/Car_inventory.cs

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

namespace Car.库存管理
{
    public partial class Car_inventory : Form
    {
        public Car_inventory()
        {
            InitializeComponent();
        }
        int i;
        int start;
        int size = 5;
        string str = "server=.;database=car;uid=sa;pwd=51Aspx";
        string str1 = "select car_id,commodity_name,commodity_date,car_color,car_zhuangtai from car_commodity where car_zhuangtai='已出售'or car_zhuangtai='已下架'";
        protected override CreateParams CreateParams//防止闪屏
        {
            get
            {
                var parms = base.CreateParams;
                parms.Style &= ~0x02000000;
                return parms;
            }
        }
        private void Car_inventory_Load(object sender, EventArgs e)
        {
            this.BackColor = Color.FromArgb(81, 81, 81);
            string sql = "select car_id,commodity_name,commodity_date,car_color,car_zhuangtai from car_commodity where car_zhuangtai='已出售'or car_zhuangtai='已下架'";
            DataTable dt = DBHelper.GetDataTable(sql);
            dataGridView1.DataSource = dt;
            i = dt.Rows.Count;//获取行数
            show(0, size);//调用show函数
            start = 0;
            labelcount.Text = string.Format("第{0}页/共{1}页 共{2}条数据", start + 1, i / size + 1, i);//显示数据
        }
        public void show(int i, int j)
        {
            SqlConnection sqlcon = new SqlConnection(str);
            sqlcon.Open();
            SqlCommand sqlcmd = new SqlCommand(str1, sqlcon);
            SqlDataAdapter sqlada = new SqlDataAdapter(sqlcmd);
            DataSet ds = new DataSet();
            sqlada.Fill(ds, i, j, "[Car_supplier]");//把数据库表中的i-j的记录数用来填充数据集
            dataGridView1.DataSource = ds.Tables["[Car_supplier]"];
            ds = null;//清空数据集
        }
        private void UpPgae_Click(object sender, EventArgs e)//上一页
        {
            if (start < 1)
            {
                MessageBox.Show("已是第一页......");