Paging,RowDataBound of a gridview with in a gridview.

Html Code:

<asp:GridView ID="grdvCommonCore" runat="server" AutoGenerateColumns="False"
OnRowDataBound="grdvCommonCore_RowDataBound"
    Width="100%" AllowPaging="True" PageSize="5">
    <AlternatingRowStyle CssClass="GridAltRowStyle" />
    <Columns>
        <asp:TemplateField HeaderText="Course Name,AU Value and Department">
            <ItemTemplate>
                <asp:GridView ID="grdvCommonCoreCourses" runat="server"
                OnRowDataBound="grdvCommonCoreCourses_RowDataBound"
                    AllowPaging="true" PageSize="10" AutoGenerateColumns="False"
                Width="100%" OnPageIndexChanging="grdvCommonCoreCourses_PageIndexChanging"
                    OnRowCommand="grdvCommonCoreCourses_RowCommand">
                    <HeaderStyle CssClass="GridHeaderStyle" />
                    <RowStyle CssClass="GridRowStyle" />
                    <AlternatingRowStyle CssClass="GridAltRowStyle" />
                    <Columns>
                        <asp:TemplateField HeaderText="Delete">
                            <ItemTemplate>
                                <asp:ImageButton ID="imgDelete" runat="server"
                             ImageUrl="~/images/Cross.png" /></ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField Visible="False">
                            <ItemTemplate>
                                <asp:Label ID="lblCommonCoreCoursesId" runat="server"></asp:Label></ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Course Name">
                            <ItemTemplate>
                                <asp:Label ID="lblCommonCoreCourses" runat="server"></asp:Label></ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="AU Value">
                            <ItemTemplate>
                                <asp:Label ID="lblCommonCoreAUvalue" runat="server"></asp:Label></ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Department Name">
                            <ItemTemplate>
                                <asp:Label ID="lblCommonCoreDepeartment" runat="server"></asp:Label></ItemTemplate>
                        </asp:TemplateField>
                    </Columns>
                </asp:GridView>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="No Of Compulsory Courses">
            <ItemTemplate>
                <asp:Label ID="lblCommonCoreCoursesNo" runat="server"></asp:Label></ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Total AU Value">
            <ItemTemplate>
                <asp:Label ID="lblCommonCoreAUValue" runat="server"></asp:Label></ItemTemplate>
        </asp:TemplateField>
    </Columns>
    <EmptyDataTemplate>
        No Course Found</EmptyDataTemplate>
    <HeaderStyle CssClass="GridHeaderStyle" />
    <RowStyle CssClass="GridRowStyle" />
</asp:GridView>

C# Coding Section:

public void ShowProgram()
{
IEnumerable<LINQ.ProgramRequirementMap> objCommonCoreProgramRequirementMap = BLL.ProgramRequirementMap.GetProgramRequirementByProgramId
      (Convert.ToInt32(hdnProgramId.Value), Constants.ProgramConstrainType.CommonCore.ToString());
if (objCommonCoreProgramRequirementMap.Count() > 0)
    grdvCommonCore.DataSource = objCommonCoreProgramRequirementMap;
else
    grdvCommonCore.DataSource = null;
grdvCommonCore.DataBind();
}

protected void grdvCommonCore_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
    GridView grdvCommonCoreCourses = (GridView)e.Row.FindControl("grdvCommonCoreCourses");
    Label lblCommonCoreCoursesNo = (Label)e.Row.FindControl("lblCommonCoreCoursesNo");
    Label lblCommonCoreAUValue = (Label)e.Row.FindControl("lblCommonCoreAUValue");

    List<LINQ.CourseProgramRequirementMap> objCommonCoreProgramRequirementMap = BLL.CourseProgramRequirementMap.GetCoursesAccordingRequirement
           ((Convert.ToInt32(hdnProgramId.Value)), Constants.ProgramConstrainType.CommonCore.ToString());

    if (grdvCommonCoreCourses != null)
    {
        if (objCommonCoreProgramRequirementMap.Count() > 0)
        {
            hdvCommonCompulsoryNo.Value = objCommonCoreProgramRequirementMap.Count().ToString();
            ShowCommonCourses(grdvCommonCoreCourses);
        }
    }
    if (lblCommonCoreCoursesNo != null)
        lblCommonCoreCoursesNo.Text = objCommonCoreProgramRequirementMap.Count() + " Of " + objCommonCoreProgramRequirementMap.Count();

    if (lblCommonCoreAUValue != null)
        lblCommonCoreAUValue.Text = doubleCommonCoreAUValue.ToString();
}
}

public void ShowCommonCourses(GridView grdvCommonCoreCourses)
{
List<LINQ.CourseProgramRequirementMap> objCommonCoreProgramRequirementMap = BLL.CourseProgramRequirementMap.GetCoursesAccordingRequirement
       ((Convert.ToInt32(hdnProgramId.Value)), Constants.ProgramConstrainType.CommonCore.ToString());

if (objCommonCoreProgramRequirementMap.Count() > 0)
{
    grdvCommonCoreCourses.DataSource = objCommonCoreProgramRequirementMap;
}
else
{
    grdvCommonCoreCourses.DataSource = null;
}
doubleCommonCoreAUValue = 0.0;
grdvCommonCoreCourses.DataBind();
}

protected void grdvCommonCoreCourses_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
    ImageButton imgDelete = (ImageButton)e.Row.FindControl("imgDelete");
    Label lblCommonCoreCoursesId = (Label)e.Row.FindControl("lblCommonCoreCoursesId");
    Label lblCommonCoreCourses = (Label)e.Row.FindControl("lblCommonCoreCourses");
    Label lblCommonCoreAUvalue = (Label)e.Row.FindControl("lblCommonCoreAUvalue");
    Label lblCommonCoreDepeartment = (Label)e.Row.FindControl("lblCommonCoreDepeartment");

    if (imgDelete != null)
    {
        imgDelete.CommandName = "DeleteCourse";
        imgDelete.CommandArgument = ((LINQ.CourseProgramRequirementMap)e.Row.DataItem).CourseId.ToString();
        imgDelete.OnClientClick = "return confirm('Are you sure you want to delete the Course from program?It will effect all the programs.');";
    }

    if (lblCommonCoreCoursesId != null)
        lblCommonCoreCoursesId.Text = ((LINQ.CourseProgramRequirementMap)e.Row.DataItem).CourseId.ToString();


    if (lblCommonCoreCourses != null)
        lblCommonCoreCourses.Text = ((LINQ.CourseProgramRequirementMap)e.Row.DataItem).Course.Abbreviation;

    if (lblCommonCoreAUvalue != null)
    {
        lblCommonCoreAUvalue.Text = BLL.CourseCategoryMap.getAuValue(Convert.ToInt32(lblCommonCoreCoursesId.Text));
        doubleCommonCoreAUValue = doubleCommonCoreAUValue + Convert.ToDouble(lblCommonCoreAUvalue.Text.Trim());
    }

    if (lblCommonCoreDepeartment != null)
        lblCommonCoreDepeartment.Text = ((LINQ.CourseProgramRequirementMap)e.Row.DataItem).Course.CourseAbbreviation.Department.DepartmentName;
}
}

protected void grdvCommonCoreCourses_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView grdvCommonCoreCourses = null;
foreach (GridViewRow row in grdvCommonCore.Rows)
{
    grdvCommonCoreCourses = (GridView)(row.Cells[0].FindControl("grdvCommonCoreCourses"));
}
grdvCommonCoreCourses.PageIndex = e.NewPageIndex;
ShowCommonCourses(grdvCommonCoreCourses);
tabProgramInfo.ActiveTabIndex = 1;
}

protected void grdvCommonCoreCourses_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName.Equals("DeleteCourse"))
{
    BLL.ProgramRequirement.Delete(Convert.ToInt32(e.CommandArgument.ToString()), Convert.ToInt32(hdnProgramId.Value),
                                  BLL.Constants.ProgramConstrainType.CommonCore.ToString());
    ShowProgram();
}
}