Help: How to read data from each row of a GridView?

[Hongbo]

Hi,

I have a GridView like this one:
==
<asp:gridview runat="server" id="gvCategory " allowpaging="tr ue" allowsorting="t rue"
alternatingrows tyle-backcolor="#B9D FC7" autogeneratecol umns="false"
pagesize="20" width="550px" datasourceid="p rodList">
<headerstyle backcolor="#B9D FC7" />
<columns>
<asp:templatefi eld>
<itemtemplate >
<asp:checkbox runat="server" id="chkAddToCar t" />
</itemtemplate>
</asp:templatefie ld>
<asp:boundfie ld headertext="pro ductID" datafield="prod uctID" visible="false" />
<asp:templatefi eld>
<itemtemplate >
<a href='<%# "/product/productDetail.a spx?productID="
+DataBinder.Eva l(Container.Dat aItem, "productId" ) %>'><img alt="" src='<%# "/images/prod/"
+DataBinder.Eva l(Container.Dat aItem, "thumbImg") %>' style="border:n one" /></a>
</itemtemplate>
</asp:templatefie ld>
</columns>
</asp:gridview>
==

In .Net 1.x, the DataGrid works with the following code:
==
foreach (DataGridItem dgi in DataGrid1.Items )
{
chb = (CheckBox)dgi.F indControl("chk AddToCart");
if (chb.Checked)
{
string pid=dgi.Cells[1].Text;
}
}
==

So I tried:
==
foreach (GridViewRow gvr in gvCategory.Rows )
{
if(gvr.HasContr ols()==true)
{
chb = (CheckBox)gvr.F indControl("chk AddToCart");

if (chb.Checked)
{
string pid = gvr.Cells[1].Text;
}
}
}
==
But gvr.Cells[1].Text returns nothing. What's wrong here?

Would you please tell me how to read data from the 2nd field--the Cells[1]
(i.e. <asp:boundfie ld headertext="pro ductID" datafield="prod uctID" visible="false" />)
in each row of the above GridView?

Thank you

hb