Editjs.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 Editjs : System.Web.UI.Page
{
    SqlHelper data = new SqlHelper();
    private readonly string SqlConnectionString = ConfigurationManager.AppSettings["ConnectionString"].ToString();
    private string BID;
    private int strID
    {
        get
        {
            return Convert.ToInt32(ViewState["_BID"]);
        }
        set
        {
            ViewState["_BID"] = Request.QueryString["BID"];
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BID = Request["BID"].ToString();
            BindData(BID);
        }
    }
    private void BindData(string BID)
    {

        DropDownList1.DataSource = data.GetDataReader("select kename from  leixing  ");
        DropDownList1.DataTextField = "kename";
        DropDownList1.DataValueField = "kename";
        DropDownList1.DataBind();

        string sqlstr;
        sqlstr = "select * from fangqi where id='" + BID + "'";
        SqlConnection scon = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"]);
        SqlCommand scm = new SqlCommand(sqlstr, scon);
        //打开数据库并执行查询操作 
        scon.Open();
        SqlDataReader dr = scm.ExecuteReader();
        if (dr.Read())
        {  
            this.TextBox1.Text = dr["name"].ToString();
            this.TextBox2.Text = dr["xibei"].ToString();

            this.DropDownList1.Text = dr["leixing"].ToString();


        }