Programmatic UltraWebGrid Memory Leak

Perry posted over 16 years ago

After profiling my application, I have found that my ASP .NET web application is never freeing up programatically created UltraWebGrids. The ASPX code and the Page_Load's pseudo are below.

Using ANTS Profiler I navigated to the page that has the grid multiple times then forced GC and took a snapshot. I found that all of the programatically created Infragistics controls were still "live".

How do I force the Infragistics controls to be GC'd?

Page_Load Pseduo-code {

grid.Clear();

grid.Columns.Clear();

grid.Rows.Clear();

// programattically create UltraWebGridColumns, UltraGridRows, and UltraGridCells and setting their styles, and other attributes.

}

<asp:Content ID="ContentPlaceHolder_FooTab" runat="server" ContentPlaceHolderID="ContentPlaceHolder_FooTab">
    <asp:Panel ID="pnlFooPopup" runat="server" Style="display: none;" CssClass="modalPopup framePopup"
        Width="300px" Height="300px">
        <iframe id="iframeFooPopup" frameborder="0" width="100%" height="100%" src="PopupEmpty.htm">
        </iframe>
    </asp:Panel>
    <div class="tabContent">
        <asp:UpdatePanel ID="upd_Foo" runat="server" EnableViewState="true" RenderMode="Block">
            <ContentTemplate>
                <igtbl:UltraWebGrid ID="grd_Foo" runat="server" Width="100%" OnDeleteRow="grd_Foo_DeleteRow">
                    <Bands>
                        <igtbl:UltraGridBand>
                            <AddNewRow View="NotSet" Visible="NotSet">
                            </AddNewRow>
                        </igtbl:UltraGridBand>
                    </Bands>
                    <DisplayLayout AllowColumnMovingDefault="None" AllowDeleteDefault="No" AllowColSizingDefault="Fixed"
                        AllowSortingDefault="No" AllowUpdateDefault="Yes" BorderCollapseDefault="Separate"
                        Name="UltraWebGrid1" RowSelectorsDefault="No" SelectTypeRowDefault="Extended"
                        StationaryMargins="HeaderAndFooter" StationaryMarginsOutlookGroupBy="True" TableLayout="Fixed"
                        Version="4.00" GridLinesDefault="NotSet" RowAlternateStylingDefault="False" ColWidthDefault="">
                        <FrameStyle BackColor="Window" BorderColor="InactiveCaption" Width="100%" />
                        <RowStyleDefault Cursor="Default" Font-Strikeout="False" />
                        <HeaderStyleDefault Wrap="true" />
                        <AddNewBox Hidden="False">
                            <BoxStyle BackColor="Window" BorderColor="InactiveCaption" BorderStyle="Solid" BorderWidth="1px">
                                <BorderDetails ColorLeft="White" ColorTop="White" WidthLeft="1px" WidthTop="1px" />
                            </BoxStyle>
                        </AddNewBox>
                        <ActivationObject BorderColor="" BorderWidth="">
                        </ActivationObject>
                    </DisplayLayout>
                </igtbl:UltraWebGrid>
            </ContentTemplate>
        </asp:UpdatePanel>
    </div>
</asp:Content>

1570

Offline Jon Mangerich posted over 16 years ago in reply to Jason

My standard grid settings are:

DisplayLayout
AllowColSizingDefault:Free
AllowColumnMovingDefault:OnServer
AllowSortingDefault:OnClient (You might want to try OnServer)
HeaderClickActionDefault:SortSingle
LoadOnDemand:XML
RowsRange:50 (How Many Rows The Grid Shows At A Time)
SeletTypeCellDefault:Single
SelectTypeRowDefault:Single
SortingAlgorithmDefault:BubbleSort
StationaryMargins:Header
TableLayout:Fixed
UseFixedHeaders:True
XMLLoadOnDemand:Virtual

Behavior:
Browser:XML

When I used this method, I was able to turn off paging because of the XmlLoadOnDemand. I played around with some of the different options to get to this configuration. Just ran a quick test and using this setup, my dataset I am returning has 11k rows. This loads and shows the first set of rows in around 2-3 seconds. Since I am also working with a large amount of data, I use a filter row to minimize database hits. Hope this helps.
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Jason posted over 16 years ago in reply to Jon Mangerich

Nope but I will. I am new to infragistics really just cleaning up after someone else, so aything u can share with me is great.
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Offline Jon Mangerich posted over 16 years ago in reply to Jason

Have you tried setting LoadOnDemand to XML and XMLLoadOnDemandType to Virtual?

I found that this helped quite a bit when working with a ton of data.

Ian
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Jason posted over 16 years ago in reply to [Infragistics] Rumen Stankov

Thanks for the quick reply. I can investigate the server side code. My main problem right now Is client side. The grid brings the processor to it's knees and chews up browser memory that it never releases. Do you have any troubleshooting tips? I already implemented custom paging. I only grab 20 recs at a time but it can be upwards of 16000 pages.
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28464

[Infragistics] Rumen Stankov posted over 16 years ago in reply to Jason

There has not been a follow up, and frankly, in the last year or so I have not heard of complications regarding server-side memory leaks. But then again, we will gladly investigate anything and try to figure out what is going on.
I just want to let you know that sometimes the grid is not responsible for huge memory usage, since it just happens to be the presentation control that is bound to a huge datasource and it is actually the datasource that does most of the damage. So maybe you can use some sort of paging directly in your data retrieving layer (ORM, stored procedure, etc).
But agains - it reallly depends - if you can share some details what happens we will gladly try to provide aditional suggestions.
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