How to check which all the check box's are TICKED MARKED in a dynamic gridview asp.net

See more:

ASP.NET

C#3.5

I have Datagrid in asp.net page with the below mentioned data

Device Name Column 1 Column 2
-------------------------------------------
iPad Check Box Check Box
iPhone Check Box Check Box
iStore Check Box Check Box


Here Check box is – Check Box Control on each Cell, please note that these check boxes are generating dynamically, initially in design mode there won't be any check box event

Here Device_Name,Column1 and Column2 are column names, under these columns we have check boxes on both the columns, Please can anybody help me how do I we get to know which all the check box's are TICKED.

Once it has been TICKED I want to assign checked value (just to identify which are been ticked) to array list from Grid view (for storing purpose, later I will pass this array list to next page).
Could you please someone help me one this
Please Note that: - while creating Gridview initially Check box will not be having any Id’s because those check boxes are dynamically generated.
This is my C# code for creating dynamic Check boxes in Gridview :-
protected void GrdOSInfo_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
for (int i = 1; i < 3; i++)
{
//foreach (GridView row in GridView1.Rows)
//{
CheckBox chk = new CheckBox();
chk.EnableViewState = true;
chk.Enabled = true;
chk.ID = "chkb"+i;

e.Row.Cells[i].Controls.Add(chk);
//}
}
}
}

This is my asp.net code
<asp:GridView ID="GrdOSInfo" runat="server" CssClass="grid_table"
onrowdatabound="GrdOSInfo_RowDataBound" BackColor="White" Width="200px"
BorderColor="#999999" BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Vertical"
>

<footerstyle backcolor="#CCCCCC" forecolor="Black">
<HeaderStyle CssClass="grid_head_row" Font-Bold="true" ForeColor="White"
BackColor="#000084" />
<pagerstyle cssclass="paging" backcolor="#999999" forecolor="Black">
HorizontalAlign="Center" />
<rowstyle cssclass="grid_even_row" backcolor="#EEEEEE" forecolor="Black">
<alternatingrowstyle cssclass="grid_even_row" backcolor="#DCDCDC">
<SelectedRowStyle CssClass="grid_head_row" BackColor="#008A8C" Font-Bold="True"
ForeColor="White" />
<sortedascendingcellstyle backcolor="#F1F1F1">
<sortedascendingheaderstyle backcolor="#0000A9">
<sorteddescendingcellstyle backcolor="#CAC9C9">
<sorteddescendingheaderstyle backcolor="#000065">