How to get the true or false in the gridview when the checkbox is checked and gridview is alerdy binded

<asp:FormView ID="FVTrueFalseTypeDetail" runat="server" DataKeyNames="TrueFalseID"
        DataSourceID="FVDSTrueFalseTypeDetail" DefaultMode="Insert" 
        OnItemInserted="FVTrueFalseTypeDetail_ItemInserted"
        OnItemUpdated="FVTrueFalseTypeDetail_ItemUpdated">
        <edititemtemplate>
            <%--<tr>
            <td>True False ID</td>
            <td><asp:Label ID="TrueFalseIDLabel1" runat="server"
                Text='<%# Eval("TrueFalseID") %>' /></td>
            </tr>--%>
            <table>
                <tr>
                    <td>
                        Question ID
                    </td>
                    <td>
                        <asp:TextBox ID="QuestionIDTextBox" runat="server" Text='<%# Bind("QuestionID") %>' />
                    </td>;
                </tr>
                <tr>
                    <td>
                        Answer
                    </td>
                    <td>
                        <asp:CheckBox ID="AnswerCheckBox" runat="server" Checked='&lt;%# Bind("Answer") %>' />
                    </td>
                </tr>
                <tr>
                <td></td>
                    <td>
                        <asp:Button ID="BtnUpdate" runat="server" CausesValidation="True" CommandName="Update"
                            Text="Update" OnClientClick="return ValidateData('Up');" />
                        <asp:Button ID="BtnCancel" runat="server" CausesValidation="False" CommandName="Cancel"
                            Text="Cancel" />
                    </td>
                </tr>
            </table>