Find HTML check box id in gridview in Update panel using C#

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ASP.NET

HTML

Gridview

controls

Hi All,
I have a gridview Under update panel. I placed HTML input checkbox in my Item template. Now i want to find this checkbox id in gridview page Index changing event. I am uanble find always its shows null object.

I user like this code in gridview page index. I tried serveral ways, but not geeting the id of checkbox.

foreach (GridViewRow row in mygrid.rows)
{
HtmlInputCheckBox chk = (HtmlInputCheckBox)row.FindControl("chkBulk"); // Null reference
CheckBox chk = (CheckBox)(row.Cells[0].FindControl("chkBulk")); // null reference
}

There is no runat="server" in check box control. I don't require that,
<itemtemplate>
<input id="chkBulk" type="Checkbox" class="Single" önClick="SetRowColor(this)"/>


I need only input check box for my Jquery functions. Now I need to find weather this input checkbox checked or not.

Please help in this issue.