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); } } }