How to check how many checkboxes are checked inside a gridview using Jquery?

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jQuery

Gridview

I have one Gridview with a template field. Template field contains the checkbox.Suppose i clicked on two check boxes and made it checked. I want to know the index of the checkbox and its value(ON or OFF). The code for gridview is given below:

<asp:GridView ID="GridView1" runat="server"
        onrowdatabound="GridView1_RowDataBound">
        <Columns>
            <asp:TemplateField>
                <HeaderTemplate>
                    <asp:CheckBox ID="CheckBox2" runat="server" />
                </HeaderTemplate>
                <ItemTemplate>
                    <asp:CheckBox ID="CheckBox1" runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

And the code for the .CS file is given below:

protected void Button1_Click(object sender, EventArgs e)
{
DataTable table = new DataTable();
table.Columns.Add("Dosage", typeof(int));
table.Columns.Add("Drug", typeof(string));
table.Columns.Add("Patient", typeof(string));
table.Columns.Add("Date", typeof(DateTime));

//
// Here we add five DataRows.
//
table.Rows.Add(25, "Indocin", "David", DateTime.Now);
table.Rows.Add(50, "Enebrel", "Sam", DateTime.Now);
table.Rows.Add(10, "Hydralazine", "Christoff", DateTime.Now);
table.Rows.Add(21, "Combivent", "Janet", DateTime.Now);
table.Rows.Add(100, "Dilantin", "Melanie", DateTime.Now);

GridView1.DataSource = table;
GridView1.DataBind();



}