GouPiao.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 GouPiao : System.Web.UI.Page
{
    SqlHelper data = new SqlHelper();

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BinderBews();
            BinderT();
        }

    }
    private void BinderT()
    {
        DropDownList1.DataSource = data.GetDataReader("select * from Ticket where Tname='" + Label1.Text + "' and isSeal='否' ");
        DropDownList1.DataTextField = "Adddress";
        DropDownList1.DataValueField = "Tid";
        DropDownList1.DataBind();

    }
    private void BinderBews()
    {
        int id = int.Parse(Request.QueryString["id"].ToString());

        SqlDataReader dr = data.GetDataReader("select * from  Car where Cid=" + id);
        dr.Read();
        {
            Label1.Text = dr["Carname"].ToString();
            Label2.Text = dr["BeginTree"].ToString();
            Label3.Text = dr["Middle"].ToString();
            Label4.Text = dr["EndTree"].ToString();
            Label5.Text = dr["zuoweishuliang"].ToString();
        }

    }
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        if (DropDownList1.SelectedValue == "")
        {
            Label7.Text = "当前没有座位了。";
        }
        else
        {
            data.RunSql("update Ticket set isSeal='是' where Tid='"+DropDownList1.SelectedValue+"' ");
            Response.Redirect("ShowT.aspx?id=" + DropDownList1.SelectedValue + "&Carname=" + Label1.Text);
        }
    }
    protected void btnBack_Click(object sender, EventArgs e)