C# 复选框必需的验证器

我在asp.net中开发了一个应用程序，在我的页面上有一个复选框，它是必填字段，我在验证后编码，但按save validation时没有调用

<asp:CheckBox ID="ChkContent" runat="server" Text=" I hereby certify that the information above is true and accurate."
                        Font-Bold="true" />
                    <asp:CustomValidator ID="Custom1"  CssClass="errorTop" ClientValidationFunction="CheckBoxValidation" runat="server"
            ErrorMessage="You must select this box to proceed" ></asp:CustomValidator> 

验证函数未调用。

在自定义验证程序控件中添加

ValidationGroup=“AddMisc”

<asp:CheckBox ID="ChkContent" runat="server" Text=" I hereby certify that the information above is true and accurate."
                        Font-Bold="true" />
                    <asp:CustomValidator ID="Custom1"  CssClass="errorTop" ClientValidationFunction="CheckBoxValidation" runat="server"
            ErrorMessage="You must select this box to proceed" ></asp:CustomValidator> 

<asp:CheckBox ID="ChkContent" runat="server" Text=" I hereby certify that the information above is true and accurate."
                        Font-Bold="true" />
                    <asp:CustomValidator ID="Custom1" 
                          CssClass="errorTop" 
                          ClientValidationFunction="CheckBoxValidation" 
                          runat="server"
                          ErrorMessage="You must select this box to proceed"
                          ValidationGroup="AddMisc">
                    </asp:CustomValidator>

在自定义验证器控件中添加

ValidationGroup=“AddMisc”

。

<asp:CheckBox ID="ChkContent" runat="server" Text=" I hereby certify that the information above is true and accurate."
                        Font-Bold="true" />
                    <asp:CustomValidator ID="Custom1" 
                          CssClass="errorTop" 
                          ClientValidationFunction="CheckBoxValidation" 
                          runat="server"
                          ErrorMessage="You must select this box to proceed"
                          ValidationGroup="AddMisc">
                    </asp:CustomValidator>