我又一段购物车的代码，可是商品怎么都添加不进去，也没有报错，麻烦帮我看看，我贴上代码
using System;
using System.Collections.Generic;
using System.Collections;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
using System.Text.RegularExpressions;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Web.Security;
using System.Web.UI.HtmlControls;


public partial class fufei_money_1 : System.Web.UI.Page
{
int AddProID;
protected void Page_Load(object sender, EventArgs e)
{
int AddProID = Convert.ToInt32(Request.QueryString["id"].ToString());
if (!IsPostBack)
{
//if (Request.QueryString["mode"] == "view")
//{
// ViewShoppingCart();
// Caculator();
//}
//if (Request.QueryString["id"] != null || Request.QueryString["id"] != "")
//{

UpdateShoppingCart();
Caculator();
//}
}
}

//创建购物车
public void CreateCartTable()
{
int AddProID = Convert.ToInt32(Request.QueryString["id"].ToString());
DataSet ds = new DataSet();
DataTable newDT = new DataTable("CartTable");
ds.Tables.Add(newDT);
DataColumn newdc;
newdc = new DataColumn("Goods_number", System.Type.GetType("System.String"));
ds.Tables["CartTable"].Columns.Add(newdc);
newdc = new DataColumn("ImgUrl", System.Type.GetType("System.String"));
ds.Tables["CartTable"].Columns.Add(newdc);
newdc = new DataColumn("original_price", System.Type.GetType("System.String"));
ds.Tables["CartTable"].Columns.Add(newdc);
newdc = new DataColumn("Present_price", System.Type.GetType("System.String"));
ds.Tables["CartTable"].Columns.Add(newdc);
newdc = new DataColumn("Total_Goods", System.Type.GetType("System.String"));
newdc.DefaultValue = 1;
ds.Tables["CartTable"].Columns.Add(newdc);
newdc = new DataColumn("Total_Price", System.Type.GetType("System.Double"));
ds.Tables["CartTable"].Columns.Add(newdc);
Session["myCartTable"] = newDT;
GridView1. DataSource = ds.Tables["CartTable"].DefaultView;
GridView1. DataBind();
}

public void UpdateShoppingCart()
{
if (Session["myCartTable"] == null)
{
CreateCartTable();
WriteShoppingCart();
}
else
{
WriteShoppingCart();
}
}
//查看购物车
public void ViewShoppingCart()
{
if (Session["myCartTable"] != null)
{
DataTable viewTable = new DataTable("nowCartTable");
viewTable = (DataTable)Session["myCartTable"];
GridView1.DataBind();
Caculator();
}
}

public void WriteShoppingCart()

{
if (Request.QueryString ["mode"]!= "view")
{
DataTable nowTable = new DataTable("nowCartTable");
nowTable = (DataTable)Session["myCartTable"];
int pn = nowTable.Rows.Count;
int i = 0;
bool hasone = false;
int nowProdId;
while (i<pn && !hasone )
{nowProdId =Int32.Parse (nowTable .Rows [i][0].ToString ());
if (nowProdId ==AddProID)
{
hasone =true ;
}
else
{
i++;
}
if (hasone )
{
DataRow oldDR;
oldDR = nowTable .Rows [i];
oldDR ["Total_Goods"]=Int32.Parse (oldDR ["Total_Goods"].ToString ())+1;
oldDR ["Total_Price"] =Int32.Parse(oldDR ["Total_Goods"].ToString ())*Double.Parse (oldDR ["Present_price"].ToString ());

}
else
{
DataRow newDR;
double unitp;
Based newbd = new Based ();
SqlConnection con = newbd.createCon();
con.Open();
string sql_str="select * from goods where Goods_number="+AddProID;
SqlDataAdapter myAdapter = new SqlDataAdapter (sql_str ,con);
DataSet ds = new DataSet();
myAdapter .Fill (ds,"AddP");
newDR=nowTable.NewRow ();
newDR[0]=AddProID ;
newDR[1]=ds.Tables ["AddP"].Rows [0]["imgurl"].ToString ();
newDR[2]=Double.Parse (ds.Tables ["AddP"].Rows [0]["original_price"].ToString ());
unitp = Double.Parse (ds.Tables ["AddP"].Rows [0]["Present_price"].ToString ());
newDR[3] =unitp ;
newDR [4]="1";
newDR[5] = unitp;
nowTable .Rows .Add (newDR );
con.Close ();

}
GridView1.DataSource = nowTable.DefaultView;
GridView1.DataBind();
Session ["myCartTable"]=nowTable ;
}

}
}
public void Caculator()
{
if (Session["myCarTable"] != null)
{
int h;
Double TotalPri;
TotalPri = 0;
DataTable nowTable3 = new DataTable("nowCartTable3");
nowTable3 = (DataTable)Session["myCartTable"];
if (nowTable3.Rows.Count > 0)
{
for (h = 0; h <= nowTable3.Rows.Count - 1; h++)
{
TotalPri = TotalPri + Int32.Parse(nowTable3.Rows[h][5].ToString());

}
label.Text = "总金额：" + TotalPri.ToString() + "元";
}
}
}


<asp:DataList ID="DataList1" runat="server" DataKeyField="id" Width="948px">

<ItemTemplate>
<div class="fufei_mo">
<table align="center" cellspacing="0" class="style1">
<tr>
<td align="center" valign="middle" class="style3">
<asp:Image ID="Image3" runat="server" Width="55px" Height="55px"
ImageUrl='<%# Eval("Imgurl") %>' /></td>
<td align="center" valign="middle" class="style4">
<asp:Label ID="Label1" runat="server" Text='<%# Eval("Goods_name") %>'></asp:Label></td>
<td align="center" valign="middle" class="style5">
¥<asp:Label ID="Label2" runat="server" Text='<%# Eval("original_price") %>'></asp:Label></td>
<td align="center" class="style8" valign="middle">
¥<asp:Label ID="Label3" runat="server" Text='<%# Eval("Present_price") %>'></asp:Label></td>
<td align="center" valign="middle" class="style7">
<asp:TextBox ID="TextBox1" runat="server" Width="50px" Text='<%# Eval("Total_Goods") %>'></asp:TextBox></td>
<td align="center" valign="middle" class="style9">
¥<asp:Label ID="Label4" runat="server" Text='<%# Eval("Total_Price") %>'></asp:Label></td>
<td align="center" valign="middle">
添加到收藏夹
<br />
<br />
<asp:Button ID="Button1" runat="server" Text="删除" BorderColor="#FF6699"
BorderWidth="1px" /> </td>
</tr>
</table>
</div>
</ItemTemplate>
</asp:DataList>

<asp:Label ID="label" runat="server" Text="Label"></asp:Label>

[解决办法]
好长，设置断点跟踪一下吧。