Stockpile/Taxis.aspx.cs

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

public partial class Stockpile_Taxis : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Convert.ToString(Session["username"]) == "")
        {
            Response.Write("<script language=javascript>alert('请登录');location='../login.aspx'</script>");
            return;
        }
        if (!IsPostBack)
        {
            this.databind();
            this.bind();
        }
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        this.bind();
    }
    public void databind()
    {
        SqlConnection strcon = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["strcon"]);
        strcon.Open();
        SqlCommand scd = new SqlCommand("select * from total",strcon);
        SqlDataReader sdr = scd.ExecuteReader();
        stockClass sc = new stockClass();
        while(sdr.Read())
        {
            int total=sc.sell(Convert.ToInt32(sdr.GetValue(4)));
            this.upda(total, Convert.ToInt32(sdr.GetValue(4)));
        }   
    }
    public void upda(int total,int id)
    {
        SqlConnection strcon = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["strcon"]);
        strcon.Open();
        SqlCommand scd = new SqlCommand("update tb_Commodity  set total=" + total + " where id=" + id,strcon);
        scd.ExecuteNonQuery();
    }
    public void bind()
    {
        SqlConnection strcon = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["strcon"]);
        strcon.Open();
        string sqlstr = "select * from total order by total desc";
        SqlDataAdapter sda = new SqlDataAdapter(sqlstr, strcon);
        DataSet ds = new DataSet();
        sda.Fill(ds, "total");