[CLOSED] Getting and setting the current page of a grid panel based on the selected row.

[rmelancon]

I have a grid panel that is loaded with say 40 items and the page size is set to 10. In code behind I am selecting a row based on a value from the database. As an example lets assume it is on page 3. I can set the grid to show page 3 in code behind using nameOfStore.LoadPage(3) which works. The problem is I can't figure out how to programatically determine the record index or page on which the selected row resides.
This is the code behind that sets the selected row based on a rowID:

 Dim rowID As String = Nothing
     rowID = String.Format("{0}|{1}", "textKey", ID_in)
     Dim sm As CheckboxSelectionModel = grdComposite.GetSelectionModel
     sm.ClearSelection()
     sm.SelectedRows.Add(New SelectedRow(rowID))

In all cases sm.SelectedIndex and sm.SelectedRow.RowIndex are always -1 and I don't see any other property that would tell me the row number of the record I selected. Once I have that I can use that and the PageSize to determine which page to load.

This is some of the grid markup:

            <ext:GridPanel
                                        runat="server"
                                        ID="grdComposite"
                                        Title="Select a Composite Allocation"
                                        BodyPadding="15"
                                        Padding="10"
                                        HeightSpec="100%">

                                        <Store>
                                            <ext:Store
                                                runat="server"
                                                ID="strComposite"
                                                PageSize="10">
                                                <Model>
                                                    <ext:Model runat="server" IDProperty="RowID">
                                                        <Fields>
                                                            <ext:ModelField Name="RowID" Type="String" />
                                                            <ext:ModelField Name="CompositeID" Type="String" />
                                                            <ext:ModelField Name="CompositeName" />
                                                        </Fields>
                                                    </ext:Model>
                                                </Model>
                                                   
                                            </ext:Store>
                                        </Store>

                                        <View>
                                            <ext:GridView
                                                    runat="server"
                                                    TrackOver="false"
                                                    EmptyText="No composites available.">
                                                <GetRowClass Handler="return record.get('RangeClass');" />
                                            </ext:GridView>
                                        </View>

                                        <ColumnModel>
                                            <Columns>
                                                <ext:Column
                                                        runat="server"
                                                        ColumnID="colCompositeName"
                                                        Header="Composite"
                                                        DataIndex="CompositeName"
                                                         
                                                        Flex="1"
                                                        MenuDisabled="true">
                                                </ext:Column>

                                            </Columns>
                                        </ColumnModel>
                                            
                                        <SelectionModel>
                                            <ext:CheckboxSelectionModel
                                                    runat="server"
                                                    ID="grdCompositeSelectionModel"
                                                    AllowDeselect="false"
                                                    Mode="Single">
                                                <DirectEvents>
                                                    <Select
                                                        OnEvent="grdCompositeSelectionModel_RowSelect" Before="maskInsightPanels(true)">
                                                        <ExtraParams>
                                                            <ext:Parameter Name="investmentid"  Value="record.getId()" Mode="Raw" />
                                                            <ext:Parameter Name="productminimums"  Value="record.productminimums" Mode="Raw" />
                                                            <ext:Parameter Name="Values" Value="Ext.encode(#{grdComposite}.getRowsValues({selectedOnly : true}))" Mode="Raw" />
                                                        </ExtraParams>
                                                    </Select>
                                                </DirectEvents>
                                            </ext:CheckboxSelectionModel>
                                        </SelectionModel>
                                        <BottomBar>
                                            <ext:PagingToolbar runat="server" />
                                        </BottomBar>
                                    </ext:GridPanel>