关于取值的问题

开发一个NBear作为基础框架的网站的时候，遇到了一个很变态的问题，自己苦思加从网上都没有找到相关的解法，只好发帖到首页来求解，真的很急的一个东西，希望大家体谅。

这个主要问题就是我有一个更新的页面产品的页面，在界面加载的时候用下面的代码初始化的页面上面控件的值：

protected void Page_Load(object sender, EventArgs e)
{
SureLogin();
int id = GetIntParam("id", 0);
if (id == 0)
{
Response.Redirect("managegoods.aspx");
}
else
{
dsCategory.Filter(WhereClip.All);
ddlCategory.DataBind();
Goods aGoods =
Gateways.SdaiBuy.Find<Goods>(id);
ddlCategory.SelectedValue = aGoods.GoodsCategory.ID.ToString();
tbMarketing.Text = aGoods.Marketing.ToString ();
tbName.Text = aGoods.Name;
tbPrice.Text = aGoods.Price;
tbStock.Text = aGoods.Stock.ToString();
weIntro.Text = aGoods.Content;
} } 然后在我更新按钮里面写了下面的代码更新数据库：

protected void btnSubmit_Click(object sender, EventArgs e)
{
//上传图片
bool fileOK = false;
string path = Server.MapPath("~/UpFile/");
string picname = string.Empty;
if (FileUploadPic.HasFile)
{
string fileExtension = System.IO.Path.GetExtension(FileUploadPic.FileName).ToLower();
string[] allowExtensions ={ ".gif", ".png", ".jpeg", ".jpg", ".bmp" };
for (int i = 0; i < allowExtensions.Length; i++)
{
if (fileExtension == allowExtensions[i])
{
fileOK = true;
}
}
}
if (fileOK)
{
try
{
FileUploadPic.SaveAs(path + FileUploadPic.FileName);
picname = System.IO.Path.GetFileName(FileUploadPic.PostedFile.FileName);
}
catch (Exception ex)
{
Label1.Text = "失败";
}
} //将商品记录更改加入数据库
int id = GetIntParam("id", 0);
Goods aGoods =
Gateways.SdaiBuy.Find<Goods>(id);
aGoods.Marketing = Convert.ToInt32 ( tbMarketing.Text);
aGoods.Name = tbName.Text;
if (picname != string.Empty)
{
aGoods.PicPath = "upfile/" + picname;
}
aGoods.Price = Server.HtmlEncode ( tbPrice.Text.Trim ());
aGoods.Stock = Convert.ToInt32 (tbStock.Text);
aGoods.Content = weIntro.Text; Gateways.SdaiBuy.Save<Goods>(aGoods);
Category aCategory = Gateways.SdaiBuy.Find<Category>(Convert.ToInt32 (ddlCategory.SelectedValue) );
aCategory.ShopGoods.Add(aGoods); Gateways.SdaiBuy.Save<Category>(aCategory);
Response.Redirect("manageGoods.aspx");
} 发现了一个问题，就是所有控件的值只能取到我在页面初始化时给他加载的值，而取不到我在里面输入的最新的值，怀疑是不是微软的东西有错误，大家有没有遇到这个问题的给我说说，谢谢了。