ASP.NET

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
    DataKeyNames="RecordID" DataSourceID="SqlDataSource1" 
        
        style="top: 272px; left: 269px; position: absolute; height: 133px; width: 527px; z-index: 1" 
        onrowdeleting="Delete">
    <Columns>
        <asp:BoundField DataField="RecordID" HeaderText="RecordID" 
            InsertVisible="False" ReadOnly="True" SortExpression="RecordID" />
        <asp:BoundField DataField="CouponTypeID" HeaderText="CouponType" 
            SortExpression="CouponTypeID" />
        <asp:BoundField DataField="TransactionDate" HeaderText="Date" 
            SortExpression="TransactionDate" />
        <asp:BoundField DataField="TransactionTypeID" HeaderText="TransactionType" 
            SortExpression="TransactionTypeID" />
        <asp:BoundField DataField="Description" HeaderText="Description" 
            SortExpression="Description" />
        <asp:BoundField DataField="CafeMenu" HeaderText="Menu" 
            SortExpression="CafeMenu" />
        <asp:BoundField DataField="SerialStart" HeaderText="Start" 
            SortExpression="SerialStart" />
        <asp:BoundField DataField="SerialEnd" HeaderText="End" 
            SortExpression="SerialEnd" />
        <asp:BoundField DataField="Price" HeaderText="Price" SortExpression="Price" />
        <asp:TemplateField HeaderText="Delete">
        <ItemTemplate>
        <span onclick="return confirm('Are you sure to Delete the record?')">
        <asp:LinkButton   runat="server" ID="lnkDelete" CommandName="Delete" Text="Delete"  >
        </asp:LinkButton>
        </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
<asp:Label ID="ErrorMessage" runat="server" 
        style="position:absolute; top: 645px; left: 282px; width: 682px; color: #FF9933; font-style: italic;" 
        Font-Bold="True" ForeColor="#003E3E"></asp:Label>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
    ConnectionString="<%$ ConnectionStrings:Coupon ManagementConnectionString10 %>" 
    SelectCommand="SELECT [RecordID], [CouponTypeID], [TransactionDate], [TransactionTypeID], [Description], [CafeMenu], [SerialStart], [SerialEnd], [Price] FROM [CouponTransaction]">
</asp:SqlDataSource>


</asp:Content>

protected void Delete(object sender, GridViewDeleteEventArgs e)
    {
        try
        {

            cnx.Open();
            SqlCommand mySqlDelete = new SqlCommand("delete from CouponTransaction where RecordID = @recordId", cnx);
            mySqlDelete.CommandType = CommandType.Text;
            mySqlDelete.Parameters.Add("@recordId", SqlDbType.Int).Value = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Values[0].ToString());
            mySqlDelete.ExecuteNonQuery();
            ErrorMessage.Text = " Row Deleted Successfully";
            cnx.Close();
        }
        catch (Exception ex)
        {
            ErrorMessage.Text = ex.Message;
        }
}

public class checkbox:CheckBox
{
    CheckBox chkbx;

	public checkbox()
	{
        chkbx = new CheckBox();
        chkbx.ID = "chk1";
        chkbx.Attributes["runat"] = "server";
        chkbx.AutoPostBack = true;
        
        chkbx.CheckedChanged += new EventHandler(myclick);
        Controls.Add(chkbx);
	}

    public void myclick(object sender, EventArgs e)
    {
        //if (sender is CheckBox)
        {
            //CheckBox cbox = sender as CheckBox;
            if (chkbx.Checked)
            {
                chkbx.Text = "checked";
            }
        }
    }
}

protected void Page_Load(object sender, EventArgs e)
    {
        checkbox cbx = new checkbox();
        form1.Controls.Add(cbx);
    }