Intersoft Community - freeze

IE freeze after webgrid filter

jelsner1976@gmail.com — Thu, 02 Jun 2011 09:17:20 GMT

I have a grid defined as below on a couple different pages.  On one of the pages that uses this, IE 8 will freeze up after they perform a filter on one of the columns.
This only happens for certain users.  Are there any IE settings, add-ons, etc. that I should look for that can cause this behaviour.
Again it works fine for most users, it is only some users and only one of the pages that uses the grid as defined below.
The other pages use the same code and it works fine.

<ISWebGrid:WebGrid ID="_webGrid" runat="server" Height="300px" UseDefaultStyle="True"
                Width="100%" DataMember="BusinessUnitCollection" DataSourceID="_businessUnitsDataSource"
                OnExport="_webGrid_Export">
                <RootTable Caption="BusinessUnitCollection" DataMember="BusinessUnitCollection" DataKeyField="BusinessUnitID">
                    <Columns>
                        <ISWebGrid:WebGridColumn AllowGrouping="No" AllowSizing="No" AllowSorting="No" Bound="False"
                            ColumnType="CheckBox" EditType="NoEdit" IsRowChecker="True" Name="RowChecker"
                            ShowInSelectColumns="No" Width="30px">
                        </ISWebGrid:WebGridColumn>
                        <ISWebGrid:WebGridColumn Caption="#" DataMember="BusinessUnitID" Name="BusinessUnitID"
                            Width="50px">
                        </ISWebGrid:WebGridColumn>
                        <ISWebGrid:WebGridColumn Caption="Property" DataMember="Name" Name="Name" Width="180px">
                        </ISWebGrid:WebGridColumn>
                        <ISWebGrid:WebGridColumn Caption="Super Region" DataMember="SuperRegion" Name="SuperRegion"
                            Width="120px">
                        </ISWebGrid:WebGridColumn>
                        <ISWebGrid:WebGridColumn Caption="Region" DataMember="Region" Name="Region" Width="120px">
                        </ISWebGrid:WebGridColumn>
                        <ISWebGrid:WebGridColumn Caption="Vintage" DataMember="Vintage" Name="Vintage" Width="200px">
                        </ISWebGrid:WebGridColumn>
                        <ISWebGrid:WebGridColumn Caption="Property Manager" DataMember="PropertyManager"
                            Name="PropertyManager" Width="180px">
                        </ISWebGrid:WebGridColumn>
                    </Columns>
                </RootTable>
                <LayoutSettings AllowFilter="Yes" AutoHeight="True" PagingMode="VirtualLoad" PagingSize="50"
                    SizeHeightBy="-30" VirtualLoadMode="LargeData" AllowExport="Yes" AllowSorting="Yes">
                    <ClientSideEvents OnInitialize="_webGrid_OnInitialize" />
                </LayoutSettings>
                <FlyPostBackSettings PostInputControls="True" />
            </ISWebGrid:WebGrid>

Wrong column is freezed when freeze pane after grouping column

interfung — Thu, 30 Dec 2010 03:15:24 GMT

Hi,

I tried to freeze a column after group, it ends up freezing the wrong column. Please kindly help.

Attached Image for your reference.

Thanks and Regards,

Fung

How to enable / disable freezing depending on data

Eric — Fri, 03 Sep 2010 09:41:51 GMT

There is a related sample in this thread: http://www.intersoftpt.com/Community/WebGrid/WebGrid-crash-scrolling-freeze-column-hidden/

When I have no data for the grid, I want to hide all columns, create my own dataset add a row and write the text "no data" into this first row's first column. This is done in the InitializeDataSource event.

In PreRender event I check if there is only this one row with this special text. If yes, I hide all columns (now works after you fixed the crash mentioned in the other thread).

Problem is now that I cannot dynamically enable/disable the column freezing. For normal display, I want the first column to freeze (not modifiable by user). But when I hide all columns when no data is present, I get the error message "Freeze Pane cannot be activated on this column because it has exceeded the maximum size of scrollable viewport."

I assume this is because there is nothing to show (message is probably slightly wrong). So I should disable the frozen columns in the PreRender event somehow. I couldn't get that working. Or leave freezing away in aspx page and enable it for normal data.

In grid's LayoutSettings I have:

<FreezePaneSettings AbsoluteScrolling="true" ActiveFrozenColumns="1" MaxFrozenColumns="1" ShowSplitterLine="False" /> In PreRender I tried to disable these values without success. I also tried leaving the above tag away and adding these values in PreRender.

I also tried to set/change the value grdResult.LayoutSettings.AllowColumnFreezing. But that caused WebGrid to crash in some JavaScript.

How do I disable/enable column freezing depending on the data I have?

WebGrid crashes when scrolling with column freeze and setting a column hidden

Eric — Fri, 08 Jan 2010 08:43:18 GMT

I experience that WebGrid crashes, when the user horizontally scrolls. This happens only when I set the first column to be frozen. It also only happens when I set some columns to hidden (Visible=false).

Attached is a simple sample in VB.NET for that (remove the .txt in the file names). Simplified, the sample contains:

An aspx file with the WebGrid "grdResult" and the columns "Description", "X1", "X2",..."X9"
<FreezePaneSettings AbsoluteScrolling="true" ActiveFrozenColumns="1" MaxFrozenColumns="1" ShowSplitterLine="False" />
In the aspx.vb code file there is a handler for InitializeDataSource which adds some static data to show, so that the grid is not empty
In the handler PreRender I change some column titles (from X1 to C1 etc.) and set two columns to Visible=False

When scrolling, it crashes with: "Microsoft JScript runtime error: 'parentElement' is null or not an object" (Break/Continue/Ignore). The debugger then stands on this JScript code: "var v1d119 =vfcb75.parentElement" (and vfcb75 is null).

I believe this is a bug in WebGrid. We are using the newest WebGrid 6.0.7200.218 and Framework 3.0.5000.705 and the users use Internet Explorer 6 to browse the page.

Can you confirm that this is a bug? If yes, will there be a hotfix available soon? Is there any workaround except not to use freezing or hiding?