updown/jellyfish/demo/UI/Form_Temperature.cs

using demo.DbModule;
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;

namespace demo.UI
{
    public partial class Form_Temperature : Form
    {
        public Form_Temperature()
        {
            InitializeComponent();
        }

        private void btnQuery_Click(object sender, EventArgs e)
        {
            DateTime starttime = Convert.ToDateTime(dtStarttime.Text);
            DateTime endtime = Convert.ToDateTime(dtEndtime.Text).AddDays(1).AddMilliseconds(-1);
            double dtspan = (endtime - starttime).TotalHours;
            if(dtspan<=48)
            {
                string querySql = "select * from temperature where CREATETIME>='" + starttime + "' and CREATETIME<='" + endtime + "'";
                DataTable dt = MySQLHelper.ExecuteDataTable(MySQLHelper.DBConnectionString, querySql);
                if (dt != null && dt.Rows.Count > 0)
                {
                    dataGridView1.DataSource = dt;
                }
            }
            else
            {
                MessageBox.Show("查询区间不能大于48小时");
            }
        }

        private void Form_Temperature_Load(object sender, EventArgs e)
        {
            dataGridView1.AutoGenerateColumns = false;
        }

        private void dataGridView1_RowStateChanged(object sender, DataGridViewRowStateChangedEventArgs e)
        {
            e.Row.HeaderCell.Value = string.Format("{0}", e.Row.Index + 1);
        }
    }
}