Passing 2 parameters in the command argument in a Gridview

Question

Can anyone teach me how to pass the 2nd parameter in the command argument in c#? I tried the code below but it only passes the 1st parameter to the 2 command argument.

protected void gvLessonPlan_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            string id = lblDeledtedId.Text;

            if(e.CommandName == "DeleteRow")
            {
                LessonPlanDataAccess.DeleteLessonPlan(Convert.ToString(e.CommandArgument), Convert.ToString(e.CommandArgument));

                int user = Convert.ToInt32(lblID.Text);
                string activity = "deleted lesson plan entry with id " + id;
                SIBSAdminDataAccess.InsertAuditTrail(activity, user);

                getLessonPlan();
            }
        }

        protected void LinkButton1_Click(object sender, EventArgs e)
        {
            GridViewRow row = (GridViewRow)((LinkButton)sender).NamingContainer;
            Label lblId = row.FindControl("lblId") as Label;
            Label COHeaderId = row.FindControl("lblCOHeaderId") as Label;

            lblDeledtedId.Text = lblId.Text;
            lblDeletedCoHeader.Text = COHeaderId.Text;
        }

 Below is my mark-up

<Columns>
                                                    <asp:TemplateField HeaderText="Lesson Plan Id" SortExpression="LPId">
                                                        <EditItemTemplate>
                                                            <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("LPId") %>'></asp:TextBox>
                                                        </EditItemTemplate>
                                                        <ItemTemplate>
                                                            <asp:Label ID="lblId" runat="server" Text='<%# Bind("LPId") %>'></asp:Label>
                                                        </ItemTemplate>
                                                    </asp:TemplateField>
                                                    <asp:BoundField DataField="GLCode" HeaderText="Grade Level" SortExpression="GLCode" />
                                                    <asp:BoundField DataField="SubCode" HeaderText="Subject" SortExpression="SubCode" />
                                                    <asp:BoundField DataField="WeekNo" HeaderText="WeekNo" SortExpression="WeekNo" />
                                                    <asp:BoundField DataField="InclusiveDate" HeaderText="InclusiveDate" SortExpression="InclusiveDate" />
                                                    <asp:BoundField DataField="FullName" HeaderText="FullName" SortExpression="FullName" />
                                                    <asp:TemplateField HeaderText="COHeaderId" SortExpression="COHeaderId">
                                                        <EditItemTemplate>
                                                            <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("COHeaderId") %>'></asp:TextBox>
                                                        </EditItemTemplate>
                                                        <ItemTemplate>
                                                            <asp:Label ID="lblCOHeaderId" runat="server" Text='<%# Bind("COHeaderId") %>'></asp:Label>
                                                        </ItemTemplate>
                                                    </asp:TemplateField>
                                                    <asp:TemplateField HeaderText="Is Lectured" SortExpression="IsLectured">

                                                        <ItemTemplate>
                                                             <span onclick="return confirm('Are you sure you want to delete? This cannot be undone.')">
                                                            <asp:LinkButton ID="LinkButton1" runat="server" CommandArgument='<%# Eval("LPId") %>' CommandName="DeleteRow" CssClass="btn btn-danger" OnClick="LinkButton1_Click">Delete</asp:LinkButton>
                                                        </span>
                                                        </ItemTemplate>
                                                    </asp:TemplateField>
                                                </Columns>

Thanks in advance.