RadPanelItem does not collapse as expected in Internet Explorer but works fine in Firefox

[Satyaprakash J]

The following piece of code does not render properly in Internet Explorer, but it works fine in Firefox. I have attached the screenshots IEPanelBar.jpg and FirefoxPanelBar.jpg.  I would like to have the first Panel Item Expanded and the second Panel Item collapsed as shown in the screenshot FirefoxPanelBar.jpg. I would like to have the second PanelItem collapsed by default as show in the screenshot FirefoxPanelBar.jpg. Please let me know of any fix for this issue.

<telerik:RadPageView ID="radPageViewAdvancedSearch" runat="server" Width="100%">
                <telerik:RadPanelBar ID="radPanelBarAssetListFilter" runat="server" Width="100%">
                    <Items>
                        <telerik:RadPanelItem Text="Valuation Queue Filter " Expanded="True" PostBack="false">
                            <Items>
                                <telerik:RadPanelItem runat="server" BackColor="#E7F1FF" Text="">
                                    <ItemTemplate>
                                            <div class="span-24 height-1">
                                            <runway:AssetListSearchFilter ID="runwayAssetListSearchFilter" runat="server"
                                            FilterLabelCssClass="span-4 color-a-4 basic-filter-label"
                                            FilterFirstColumnCssClass="span-12 last advanced-search-filter"
                                            FilterSecondColumnCssClass="span-12 last advanced-search-filter"
                                            FilterEmptyName="AssetSearchParamWide"
                                            FilterDateTimeToLabelCssClass="color-a-4 datetime-label"
                                            FilterContainerCssClass="span-8 last"
                                            FilterFromTextBoxCssClass="AdvancedSearchText"
                                            FilterToTextBoxCssClass="AdvancedSearchText"/>
                                            </div>
                                    </ItemTemplate>
                                </telerik:RadPanelItem>
                            </Items>
                        </telerik:RadPanelItem>
                    </Items>
                </telerik:RadPanelBar>
                <br />
                <telerik:RadPanelBar ID="radPanelBarAssetFilter" runat="server" Width="100%">
                    <Items>
                        <telerik:RadPanelItem Text="Asset Filter" Expanded="False"  PostBack="false">
                            <Items>
                                <telerik:RadPanelItem runat="server" BackColor="#E7F1FF" Text="">
                                    <ItemTemplate>
                                            <div class="span-24 height-1">
                                            <runway:AssetSearchFilter ID="runwayAssetSearchFilter" runat="server"
                                            FilterLabelCssClass="span-4 color-a-4 basic-filter-label"
                                            FilterFirstColumnCssClass="span-12 advanced-search-filter"
                                            FilterSecondColumnCssClass="span-12 last advanced-search-filter"
                                            FilterEmptyName="AssetSearchParamWide"
                                            FilterDateTimeToLabelCssClass="color-a-4 datetime-label"
                                            FilterContainerCssClass="span-8 last"
                                            FilterFromTextBoxCssClass="AdvancedSearchText"
                                            FilterToTextBoxCssClass="AdvancedSearchText"/>
                                        </div>
                                    </ItemTemplate>
                                </telerik:RadPanelItem>
                            </Items>
                        </telerik:RadPanelItem>
                    </Items>
                </telerik:RadPanelBar>
        </telerik:RadPageView>

Thanks
Satyaprakash J

[Paul]

Hello Satyaprakash J,

Maybe you've hit the notorious limitation of Internet Explorer - it can load up to 32 CSS files and if there are more, they will be ignored. This problem can occur in case you are using a theme with a lot of CSS (when you register the theme, automatically all the CSS is declared) or you have declared a lot of RadControls on the page. If you are using a theme you can test my assumption by removing it and test whether the RadTabStrip CSS will load correctly.

If this is the case I suggest to either use a RadStyleSheetManager which will combine all the CSS on the page or reduce the CSS files used.

Regards,
Paul
the Telerik team

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[Satyaprakash J]

Hi Paul,
         Thank you for your quick response. The problem was due to the IE limit of loading only 32 css files.

Thanks
Satyaprakash J