问题补充：

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

if (Request.QueryString["lineInfoId"] == "" || Request.QueryString["lineInfoId"] == null)

{

Response.Redirect("TravelAround.aspx");

}

else

{

lineInfoid = Request.QueryString["lineInfoId"];

Response.Cookies.Add(new HttpCookie("bindShow",Request.QueryString["lineInfoId"]));

}

}

if (Request.Cookies["bindShow"].Value != "")

{

lineIdCount = lineIdCount + "," + Request.Cookies["bindShow"].Value;

HistoryRestore(lineIdCount);

}

}

private void HistoryRestore(string showID)

{

Response.Cookies.Add(new HttpCookie("lineID", showID));

if (Request.Cookies["lineID"] != null)

{

string tempStr = Request.Cookies["lineID"].Value;

string shwid = string.Empty;

string[] str = tempStr.Split(',');

for (int i = 1; i <= str.Length; i++)

{

if (i >= str.Length - 1)

{

if (shwid == "")

{

shwid = str[i - 1];

}

else

{

shwid += "," + str[i - 1];

}

}

}

string sqlSelct = "select LineTitle,HistoryImage,LinePrice,AllRoute From LineInfo where LineInfoId in(" + shwid + ")";

rpthistory.DataSource = DbSqlHelper.ExecuteDataSet(sqlSelct).Tables[0];

rpthistory.DataBind();

}

}

这是我现在写的代码，可是它把别个点击的商品也显示我的电脑上面了