WebGrid: disappearing columns and scrolling slider locked

Eric — Tue, 21 Dec 2010 05:24:16 GMT

Hi,

I have created a demo-project for you which shows the problems. Please see attached ZIP.

Please include the Intersoft framework 3.0.5000.705, WebGrid 6.0.7200.220, System.Web.Extensions.dll 1.0.61231.0, AjaxControlToolkit.dll 1.0.10606.0, AJAXExtensionsToolbox.dll 1.0.61025.0 in order to get the same results. Please also set the .NET Target Framework to 2.0.

To reproduce the problem:

select in the dropdown "ABC" and click refresh button
in the upper WebGrid make the first column wider (resize it)
click on any row in the upper WebGrid

Now the application crashes trying to access grdUpper.RootTable.Columns.GetNamedItem("D"). Please note that the first column is only set to Visible=false, never it's missing.

Also, this only happens if the first column is resized. If not touching this, it works.

As an additional bug, in the lower grid the slider to move between different pages doesn't work. Only the + and - buttons move the slider.

My questions:

Can you confirm these two bugs?
Will there be a hotfix for it?
Do you know of any workaround possible?

Regards,

Eric

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?

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WebGrid: disappearing columns and scrolling slider locked

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