Good Morning All

i have a Ultrawebgrid defined like this

<igtbl:UltraWebGrid ID="ultraGridStudentsMixTypes" runat="server"
                                    Style="left: -8px; top: 375px" OnInitializeLayout="ultraGridStudentsMixTypes_InitializeLayout" OnDataBound="ultraGridStudentsMixTypes_DataBound" OnSelectedRowsChange="ultraGridStudentsMixTypes_SelectedRowsChange">
                                        <Bands>
                                            <igtbl:UltraGridBand>
                                                <RowEditTemplate>
                                                    <br />
                                                    <p align="center">
                                                        <input id="igtbl_reOkBtn" onclick="igtbl_gRowEditButtonClick(event);" style="width: 50px"
                                                        type="button" value="OK" />&nbsp;
                                                        <input id="igtbl_reCancelBtn" onclick="igtbl_gRowEditButtonClick(event);" style="width: 50px"
                                                        type="button" value="Cancel" /></p>
                                                </RowEditTemplate>
                                                <RowTemplateStyle BackColor="Window" BorderColor="Window" BorderStyle="Ridge">
                                                    <BorderDetails WidthBottom="3px" WidthLeft="3px" WidthRight="3px" WidthTop="3px" />
                                                </RowTemplateStyle>
                                                <AddNewRow View="NotSet" Visible="NotSet">
                                                </AddNewRow>
                                                <Columns>
                                                <igtbl:UltraGridColumn AllowUpdate="No" BaseColumnName="ID" DataType="System.Int32"
                                                    Hidden="True" IsBound="True" Key="ID">
                                                    <Header Caption="ID">
                                                    </Header>
                                                </igtbl:UltraGridColumn>
                                                <igtbl:UltraGridColumn AllowUpdate="No" BaseColumnName="Subject" IsBound="True" Key="Subject">
                                                    <Header Caption="Subject">
                                                        <RowLayoutColumnInfo OriginX="1" />
                                                    </Header>
                                                    <Footer>
                                                        <RowLayoutColumnInfo OriginX="1" />
                                                    </Footer>
                                                </igtbl:UltraGridColumn>
                                                <igtbl:UltraGridColumn AllowUpdate="No" BaseColumnName="Activity" IsBound="True"
                                                    Key="Activity">
                                                    <Header Caption="Activity">
                                                        <RowLayoutColumnInfo OriginX="2" />
                                                    </Header>
                                                    <Footer>
                                                        <RowLayoutColumnInfo OriginX="2" />
                                                    </Footer>
                                                </igtbl:UltraGridColumn>
                                                <igtbl:UltraGridColumn AllowUpdate="Yes" BaseColumnName="Length" DataType="System.Int32"
                                                    IsBound="True" Key="Length">
                                                    <Header Caption="Length">
                                                        <RowLayoutColumnInfo OriginX="3" />
                                                    </Header>
                                                    <Footer>
                                                        <RowLayoutColumnInfo OriginX="3" />
                                                    </Footer>
                                                </igtbl:UltraGridColumn>
                                                  <igtbl:UltraGridColumn AllowUpdate="Yes" BaseColumnName="Mix" DataType="System.Int32"
                                                    IsBound="True" Key="Mix">
                                                    <Header Caption="Mix">
                                                        <RowLayoutColumnInfo OriginX="4" />
                                                    </Header>
                                                    <Footer>
                                                        <RowLayoutColumnInfo OriginX="4" />
                                                    </Footer>
                                                </igtbl:UltraGridColumn>
                                            </Columns>
                                            </igtbl:UltraGridBand>
                                        </Bands>
                                        <DisplayLayout Version="4.00" AllowSortingDefault="OnClient" StationaryMargins="Header"
                                        AllowColSizingDefault="Free" StationaryMarginsOutlookGroupBy="True"
                                        HeaderClickActionDefault="SortSingle" Name="ultraGridStudentsMixTypes" BorderCollapseDefault="Separate"
                                        TableLayout="Fixed" RowHeightDefault="20px" SelectTypeRowDefault="Extended" CellClickActionDefault="RowSelect" EnableInternalRowsManagement="True" SelectTypeCellDefault="Extended" SelectTypeColDefault="Extended">
                                            <FrameStyle BorderWidth="1px" BorderColor="InactiveCaption" BorderStyle="Solid" Font-Size="10pt"
                                            Font-Names="Verdana" BackColor="Window">
                                            </FrameStyle>
                                            <Pager MinimumPagesForDisplay="2" PagerAppearance="Both" PageSize="30" StyleMode="ComboBox"
                                            AllowPaging="True" AllowCustomPaging="True">
                                                <PagerStyle BorderWidth="1px" BorderStyle="Solid" BackColor="LightGray">
                                                    <BorderDetails ColorLeft="White" ColorTop="White" WidthLeft="1px" WidthTop="1px" />
                                                </PagerStyle>
                                            </Pager>
                                            <EditCellStyleDefault BorderWidth="0px" BorderStyle="None" Font-Names="Verdana" Font-Size="8pt">
                                            </EditCellStyleDefault>
                                            <FooterStyleDefault BorderWidth="1px" BorderStyle="Solid" BackColor="LightGray">
                                                <BorderDetails ColorLeft="White" ColorTop="White" WidthLeft="1px" WidthTop="1px" />
                                            </FooterStyleDefault>
                                            <HeaderStyleDefault HorizontalAlign="Left" BorderStyle="Solid" BackColor="LightGray"
                                            Font-Bold="True" Font-Names="Verdana" Font-Size="10pt">
                                                <BorderDetails ColorLeft="White" ColorTop="White" WidthLeft="1px" WidthTop="1px" />
                                            </HeaderStyleDefault>
                                            <RowStyleDefault BorderWidth="1px" BorderColor="Silver" BorderStyle="Solid" Font-Size="8pt"
                                            Font-Names="Verdana" BackColor="Window">
                                                <Padding Left="3px" />
                                                <BorderDetails ColorLeft="Window" ColorTop="Window" />
                                            </RowStyleDefault>
                                            <GroupByRowStyleDefault BorderColor="Window" BackColor="Control">
                                            </GroupByRowStyleDefault>
                                            <SelectedRowStyleDefault BackColor="Silver" Font-Names="Verdana" Font-Size="8pt">
                                            </SelectedRowStyleDefault>
                                            <GroupByBox>
                                                <BoxStyle BorderColor="Window" BackColor="ActiveBorder">
                                                </BoxStyle>
                                            </GroupByBox>
                                            <AddNewBox>
                                                <BoxStyle BorderWidth="1px" BorderColor="InactiveCaption" BorderStyle="Solid" BackColor="Window">
                                                    <BorderDetails ColorLeft="White" ColorTop="White" WidthLeft="1px" WidthTop="1px" />
                                                </BoxStyle>
                                            </AddNewBox>
                                            <ActivationObject BorderWidth="" BorderColor="">
                                            </ActivationObject>
                                            <FilterOptionsDefault>
                                                <FilterDropDownStyle BorderWidth="1px" BorderColor="Silver" BorderStyle="Solid" Font-Size="11px"
                                                Font-Names="Verdana,Arial,Helvetica,sans-serif" BackColor="White" Width="200px"
                                                Height="300px" CustomRules="overflow:auto;">
                                                    <Padding Left="2px" />
                                                </FilterDropDownStyle>
                                                <FilterHighlightRowStyle ForeColor="White" BackColor="#151C55">
                                                </FilterHighlightRowStyle>
                                                <FilterOperandDropDownStyle BorderWidth="1px" BorderColor="Silver" BorderStyle="Solid"
                                                Font-Size="11px" Font-Names="Verdana,Arial,Helvetica,sans-serif" BackColor="White"
                                                CustomRules="overflow:auto;">
                                                    <Padding Left="2px" />
                                                </FilterOperandDropDownStyle>
                                            </FilterOptionsDefault>
                                        </DisplayLayout>
                                    </igtbl:UltraWebGrid>

and i have the Following Code in the SelectedRowsChange event to get the Id of the selected Rows.

protected void ultraGridStudentsMixTypes_SelectedRowsChange(object sender, SelectedRowsEventArgs e)
    {
        SelectedRowsCollection rows = ultraGridStudentsMixTypes.DisplayLayout.SelectedRows;

        string ids = string.Empty;

        foreach (UltraGridRow Rows in rows)
        {
            ids += Rows.Cells.FromKey("ID").Value.ToString() + ", ";

        }

        char[] chars = { ',', ' ' };

        Session["Selected_Rows"] = ids.TrimEnd(chars);
    }

Now  the code inside the Foreach does not run. What i want is to get the ID of the selected Row in the Grid.

Am using Infragisticts 8.1

Thank you