How to get state from checkBox in gridview

<asp:GridView ID="grid" runat="server" Style="margin-left: 0px" AutoGenerateColumns="False"
            CellPadding="4" ForeColor="#333333" GridLines="None" Font-Size="Smaller" Width="700px"
            DataKeyNames="OrderCode" OnRowEditing="grid_RowEditing" OnRowDeleting="grid_RowDeleting"
            CssClass="tabela" HorizontalAlign="Center" AlternatingRowStyle-HorizontalAlign="Center"
            RowStyle-HorizontalAlign="Center" AllowPaging="True" OnPageIndexChanging="grid_PageIndexChanging">
            <AlternatingRowStyle BackColor="White" ForeColor="#284775" HorizontalAlign="Center" />
            <Columns>
                <asp:BoundField DataField="OrderCode" HeaderText="Код на нарачка" />
                <asp:BoundField DataField="DateCreated" HeaderText="Дата на креирана нарачка" />
                <asp:CheckBoxField DataField="Payed" HeaderText="Платено" />

                <asp:CheckBoxField DataField="ReadyForShipping"  HeaderText="Спремно за испорака" />
                <asp:CheckBoxField DataField="Shipped" HeaderText="Испратено" />
                <asp:CheckBoxField DataField="Delivered" HeaderText="Доставено" />
                <asp:CheckBoxField DataField="Cashed" HeaderText="Исплатено" />
                <asp:BoundField DataField="ProductName" HeaderText="Име на производ" />
                <asp:BoundField DataField="UnitCost" HeaderText="Цена" />
                <asp:BoundField DataField="Size" HeaderText="Големина" />
                <asp:BoundField DataField="Quantity" HeaderText="Количина" />
                <asp:TemplateField HeaderText="Спремно за испорака" ItemStyle-HorizontalAlign="Center">
                    <ItemTemplate>
                        <asp:ImageButton ID="Agree" runat="server" ImageUrl="../Dodatoci za Master/agreee.png"
                            CommandName="Edit" OnClientClick="return confirm('Дали производот е спремен за испорака (соодветно спакуван)?');"
                            AlternateText="Give Permission" />
                    </ItemTemplate>
                    <ItemStyle HorizontalAlign="Center"></ItemStyle>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Откажи нарачка" ItemStyle-HorizontalAlign="Center">
                    <ItemTemplate>
                        <asp:ImageButton ID="Cancel" runat="server" ImageUrl="../Dodatoci za Master/delete.png"
                            CommandName="Delete" OnClientClick="return confirm('Дали сте сигурни дека сакате да ја откажете нарачката?');"
                            AlternateText="Give Permission" />
                    </ItemTemplate>
                    <ItemStyle HorizontalAlign="Center"></ItemStyle>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>