using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;

public partial class 子页面_1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DateTime currentTime,a,b;//a和b为起止时间
        currentTime = System.DateTime.Now;
        if (System.DateTime.Now.Hour >= 20)
        {
            a = currentTime.Date.AddHours(-3);
            b = a.AddHours(23);
        }
        else
        {
            a = currentTime.Date.AddHours(-27);
            b = currentTime.Date.AddHours(-4);

        }
 
        //查询时段a-b的数据
        string ConStr = "server=IBM;user id=sa;pwd=sa;database=dataserver";
        SqlConnection con = new SqlConnection(ConStr);
        string SqlStr = "select * from tb_hourdata where 时次>='" + a + "' and 时次<='" + b + "'order by 站号 ASC";
        con.Open();
        SqlDataAdapter da = new SqlDataAdapter(SqlStr, con);
        DataSet ds = new DataSet();
        da.Fill(ds);
        GridView1.DataSource = ds;
        GridView1.DataBind();
        con.Close();
    }
}