How to get the HeaderText or GidviewId of the GridView using JavScript in ASP.Net

How to get the headertext from the gridview .

I want to get the Headertext and bind it in the Checkbox control

 public void chk()
    {
        int a = Convert.ToInt32(lblaaa.Text);

        foreach (GridViewRow row in grdBindExcel.Rows)
        {
            if (row.RowType == DataControlRowType.DataRow)
            {
                for (int i = 0; i < row.Cells.Count; i++)
                {
                    
                    checkBox = new CheckBox();
                    string val = grdBindExcel.HeaderRow.Cells[i].Text;
                    checkBox.Text = val.ToString();
                    checkBox.ID = Convert.ToInt32(i).ToString();
                }
            }
        }
    }

  <asp:CheckBox ID="checkBox" runat="server" />