未将对象引用设置到对象实例问题 - 编程论坛

在前台页面我放了imagebutton

<asp:ImageButton ID="ImageButton2" runat="server"   CommandName="detailSee"  CommandArgument =<%#DataBinder.Eval(Container.DataItem,"BookID") %>
  ImageUrl='<%#DataBinder.Eval(Container.DataItem,"BookUrl") %>'Width="100%"

onclick="ImageButton2_Click"  />

通过CommandArgument =<%#DataBinder.Eval(Container.DataItem,"BookID") %>绑定数据库的商品id
我想通过这个图片按钮查看商品的详细信息。

程序代码：

    public void GetGoodsInfo()
    {
        string strSql = "select * from tb_BookInfo where BookID=" + Convert.ToInt32(Request["id"].Trim());//断点调试这里的值是null 没获取到商品的id
        SqlCommand myCmd = dbObj.GetCommandStr(strSql);
        DataTable dsTable = dbObj.GetDataSetStr(strSql, "tbBI");
        this.txtCategory.Text = gcObj.GetClass(Convert.ToInt32(dsTable.Rows[0]["ClassID"].ToString()));
        this.txtName.Text = dsTable.Rows[0]["BookName"].ToString();
        this.txtAuthor.Text = dsTable.Rows[0]["Author"].ToString();
        this.txtCompany.Text = dsTable.Rows[0]["Company"].ToString();
        this.txtMarketPrice.Text = dsTable.Rows[0]["MarketPrice"].ToString();
        this.txtHotPrice.Text = dsTable.Rows[0]["HotPrice"].ToString();
        this.ImageMapPhoto.ImageUrl = dsTable.Rows[0]["BookUrl"].ToString();
        this.cbxCommend.Checked = bool.Parse(dsTable.Rows[0]["Isrefinement"].ToString());
        this.cbxHot.Checked = bool.Parse(dsTable.Rows[0]["IsHot"].ToString());
        this.cbxDiscount.Checked = bool.Parse(dsTable.Rows[0]["IsDiscount"].ToString());
        this.txtShortDesc.Text = dsTable.Rows[0]["BookIntroduce"].ToString();
    }

是我传值的方式错了还是怎么回事？