后台代码绑定xml作为Repeater的数据源，Page_Load事件被执行2次！

Question

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

        if (Request.QueryString["do"] != null && Request.QueryString["do"] == "list")
        { 
            Init("", "", "", "", "", "");
        }
    }

    ///<summary>
    /// 初始document
    ///</summary>
    ///<param name="outCity1">起飞城市（中文）</param>
    ///<param name="toCity1">到达城市（中文）</param>
    ///<param name="outCode1">起飞城市（Code）</param>
    ///<param name="toCode1">到达城市（Code）</param>
    ///<param name="outDate1">起飞日期</param>
    ///<param name="type1">航程类型</param>
    private void Init(string outCity1, string toCity1, string outCode1, string toCode1, string outDate1, string type1)
    {
        //接收 往返、联程时 选择下一程 传递的参数
        string outCity = outCity1;
        string toCity = toCity1;
        string outCode = outCode1;
        string toCode = toCode1;
        string outDate = outDate1;
        string toDate = "";
        string type = type1;

        if (Request.QueryString["do"] == "list") //接收本页面 查询 按钮 传递的参数
        {
            outCity = Request.Form["seach_outCity"].ToString();
            toCity = Request.Form["seach_toCtiy"].ToString();
            outCode = Request.Form["seach_outCode"].ToString();
            toCode = Request.Form["seach_toCode"].ToString();
            outDate = Request.Form["seach_outDate"].ToString();
            toDate = Request.Form["seach_toDate"].ToString();
            type = Request.Form["seach_type"].ToString();
        }
        else if (outCity == "")  //接收首页 查询 按钮 传递的参数
        {
            outCity = Request.QueryString["seach_outCity"].ToString();
            toCity = Request.QueryString["seach_toCtiy"].ToString();
            outCode = Request.QueryString["seach_outCode"].ToString();
            toCode = Request.QueryString["seach_toCode"].ToString();
            outDate = Request.QueryString["seach_outDate"].ToString();
            toDate = Request.QueryString["seach_toDate"].ToString();
            type = Request.QueryString["seach_type"].ToString();
        }

        //开始填充 document
        this.lOutToCity.Text = outCity + " -- " + toCity;
        this.lToOutCity.Text = outCity + " - " + toCity;
        this.lOutDate.Text = Convert.ToDateTime(outDate).ToString("D");

        //获取低价信息
        DataTable dtPromotion = ssc.GetPromotionByCity(outCode, toCode, DateTime.Now.AddDays(1).ToString("d") + " 00:00:00", DateTime.Now.AddDays(9).ToString("d") + " 23:59:59");

        this.Repeater1.DataSource = dtPromotion;
        this.Repeater1.DataBind();
        //获取航班信息
        string xml = ssc.SeachToDayFlightInfo(outCode, toCode, Convert.ToDateTime(outDate), "0600");
        XmlDocument doc = new XmlDocument();
        doc.LoadXml(xml);

        this.Repeater2.DataSource = doc.DocumentElement.ChildNodes;
        this.Repeater2.DataBind();
        this.hidNum.Value = (doc.DocumentElement.ChildNodes.Count + 10).ToString();

        Session["mark"] = "0";
    }

我后台用xml作为Repeater的数据源，可以每次Page_Load事件会被执行2次，找了好长时间，未能找到原因。高手给回应吧！

Answer 1

Page_Load事件改为： protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { Init("", "", "", "", "", ""); } else { if (Request.QueryString["do"] != null && Request.QueryString["do"] == "list") { Init("", "", "", "", "", ""); } } } 试试