Save checked CheckBoxList items value in database using VB.Net in ASP.Net

I have a repeater who has to be populated with output from a function which gives values from a class getAgentGroup as IEnumerables

                                        <asp:Repeater ID="RepeaterAgentGroups" runat="server">
                                            <ItemTemplate>
                                                <asp:CheckBox ID="chkAgentGroup" runat="server" />&nbsp;&nbsp;
                                                <asp:Label ID="lblAgentGroupName" runat="server" Text='<%#Eval("Group.Name") %>'></asp:Label>
                                            </ItemTemplate>
                                        </asp:Repeater>

   Public Function GetAgentGroups(agentName As String) As IEnumerable(Of GroupAgentRelation)
        Dim agent As Datalayer.Agent = Datalayer.Agent.For(mTenant).GetAgent(agentName)
        If Not agent Is Nothing Then
            Return agent.GroupRelations
        End If
        Return New List(Of GroupAgentRelation)
    End Function

   public GroupRelation(Group group, User user, bool fix, bool active, eGroupMemberRole role)
        {
            this.Group = group;
            this.User = user;
            this.Fixed = fix;
            this.Active = active;
            this.Role = role;
        }
    }

    public class GroupAgentRelation : GroupRelation
    {
        public Agent Agent;

        public class Factory
        {
            public virtual GroupAgentRelation CreateNew(Group group, Agent agent, bool fix, bool active)
            {
                return new GroupAgentRelation(group, agent, fix, active);
            }
        }

        public GroupAgentRelation(Group group, Agent agent, bool fix, bool active)
            : base(group, agent.User, fix, active, eGroupMemberRole.None)
        {
            this.Agent = agent;
        }
    }

Ho do i populate labels in repeater with group name and checkbox state based on active and fixed.. Also how do i know which checkbox is checked while saving snce they are not named according to group name.