模态对话框中的Checkbox.checked 状态读取不出来，求高手解答，谢谢

Question

在模态对话框中有girdview，girdview中有checkbox，勾选后点击模态对话框中的按钮会验证是否勾选checkbox，实际遇到的情况是，勾选了checkbox，验证的时候checkbox.checked还是false，求解答，谢谢!

Answer 1

aspx：
 <form id="form1" runat="server">
    <div>
        <table cellpadding="5" border="1" cellspacing="0" width="450px">
            <tr>
                <td colspan="2" align="right" style="background-color: #6CA6CD; height: 10px">
                    <asp:Label ID="Label3" runat="server" Text="添加项目"></asp:Label>
                </td>
            </tr>
            <tr>
                <td>
                    <asp:GridView ID="gvProject" runat="server" AutoGenerateColumns="false">
                        <Columns>
                            <asp:TemplateField>
                                <ItemTemplate>
                                    <asp:CheckBox ID="chkGVRow" runat="server" />
                                </ItemTemplate>
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="序号">
                                <ItemTemplate>
                                    <%# Container.DataItemIndex+1 %>
                                </ItemTemplate>
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="项目名称">
                                <ItemTemplate>
                                    <%# Eval("name")%>
                                </ItemTemplate>
                            </asp:TemplateField>
                        </Columns>
                    </asp:GridView>
                </td>
            </tr>
            <tr>
                <td>
                    <asp:Label ID="lblNotice" runat="server" Text="" ForeColor="Red"></asp:Label>
                    <asp:Button ID="btnConfirm" runat="server" Text="确认" OnClick="btnConfirm_Click" />
                </td>
            </tr>
        </table>
    </div>
    </form>

Answer 2

aspx.cs：
 private bool checkIfSelectRows()
        {
            int m = 0;
            for (int i = 0; i < this.gvProject.Rows.Count; i++)
            {
                CheckBox cbox = (CheckBox)gvProject.Rows[i].FindControl("chkGVRow");
                if (cbox.Checked == true)
                {
                    m++;
                }
            }
            if (m != 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }