If you’re testing your ASP.NET project in Internet Explorer 10, you may encounter following error:
SCRIPT5022: Sys.ArgumentOutOfRangeException: Value must be an integer.
Parameter name: (x or y)
Actual value was (some floating point value)
ScriptResource.axd, line … character …
Often it come up when you use some 3rd party libraries, Telerik or Infragistics (in my case it happened in WebDataMenu control).
Here why it happens. Continue reading →
This is a solution for specific (and maybe somewhat obscure, but it helped me, so perhaps it will be helpful to someone else) scenario for Infragistics’ WebHierarchicalDataGrid error “Async request failed“.
It could be accompanied by inner errors
Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request
or more generic
Object Reference not set
In this particular scenario WHDG uses manual LoadOnDemand for to populate children (i.e. RowIslandPopulating event is used) and parent grid is sorted by one or more columns. Error is happening when attempting to expand second child or a grandchild. Continue reading →
Infragistics WebDataMenu comes with variety of styles and lets you specify your own. At a very basic it allows you to specify styles for normal menu items and hovered menu items:
<ig:WebDataMenu ID="xwdmMyMenu" runat="server"> <ItemSettings CssClass="MenuItem" HoverCssClass="MenuItemHover"/> </ig:WebDataMenu>
This markup can correspond to CSS classes, for example:
.MenuItem {
background-image:none;
background-color:white;
}
.MenuItemHover{
background-color:rgb(213,224,198);
}
This works fine in most cases, but since the hover/unhover is done via JavaScript sometimes there’re issues. Continue reading →
If you’re using FusionCharts you may encounter a strange issue – chart renders correctly when Flash renderer is in use and displays “Invalid Data” error message when falling back (or forced) to JavaScript renderer.
In most cases culprit is invalid XML data passed to the engine. And while Flash is more forgiving, JavaScript requires strict valid XML. Most often the cause for the issue are characters invalid in XML. Check your data and if they contain following characters – replace them with their encoded values:
" (quote) --> "
' (apostrophe) --> '
< (less sign) --> <
> (greater sign) --> >
& (ampersand) --> &
And the error will disappear.
Happy charting!
Infragistics WebTab control is very versatile and offers rich server- and client-side model. Among client-side events are
SelectedIndexChanged – fires after user has changed the tab to provide ways to interact with newly selected tabSelectedIndexChanging – fires before user has changed the tab to provide ways to interact with currently selected tab and to give user a chance to cancel change.Both work fine if user manually changes tabs by clicking on tab headers, but call to client-side set_selectedIndex() function (which changes tabs programmaticaly) only fires SelectedIndexChanged, skipping SelectedIndexChanging altogether. But there’s a way to make it work.
Continue reading →
FusionCharts states in their documentation that in Bubble and Scatter Charts both X-Axis and Y-Axis must be numeric. But what if you want X-Axis to display some names or dates or other non-numeric values? That is still possible via label attribute of chart’s categories element.
The method below utilizes ADO.NET/VB.NET to build XML for chart data, but similar approach can be easily used in other languages/technologies.
Consider the following ADO.NET DataTable, called dtChartData:
Login Failure Login Success -------------- -------------- ------------- 2013-03-27 1 69 2013-03-26 0 32 2013-03-25 1 86 2013-03-22 0 11
It holds data for number of successful/unsucessful logins for a given date. We want to display this data as a Bubble chart with dates displayed on X-Axis. Continue reading →
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If you use CSOM of Infragistics WebDataGrid you may encounter a bug in client-side event handlers. Let’s say some action is needed on double clicking of a grid cell. The handler looks something like this:
function xMyGrid_DoubleClick(sender, eventArgs) {
if (eventArgs.get_type() == "cell") {
//perform action
}
}
IF condition on line 2 makes sure that action is executed only if actual grid cell is double clicked. If you double click column header, eventArgs.get_type() would return "header" and the action would be skipped.
But not in FireFox. In that browser eventArgs.get_type() returns "cell" even when header is clicked. So an additional condition is needed. Grid column header is rendered as a TH HTML element and this is what we can check:
function xMyGrid_DoubleClick(sender, eventArgs) {
if (eventArgs.get_type() == "cell" && eventArgs.get_item().get_element().tagName != 'TH') {
//perform action
}
}
This solution works universally in all browsers.
Infragistics WebDataGrid/WHDG controls for ASP.NET offer nice filtering features. Out of the box you just have to enable the behavior and badabingo:
There is one glitch though in the way text filtering is implemented: If you enter an empty string as a filter value – an error is thrown:
Async refresh failed. Length cannot be less than zero
Apparently internal grid code cannot handle empty strings (as of version 12.2) so we have to take matter in our own hands.
Continue reading →
FusionCharts is a very cool cross-platform charting library – it offers huge variety of chart types and mind-blowing special effects. It also offers wide variety of chart rendering options both client- and server-side.
One such option is to render chart in an ASP.NET application. FusionCharts.dll that you get with the package offers handy FusionCharts.RenderChart method that generates all the client-side code you need to display a beautiful chart. Usually it is used something like this:
xLabel1.text = FusionCharts.RenderChart("FusionCharts/Pie2D.swf", "", sChartXmlData, sChartID, iChartWidth, iChartHeight, False, True)
where xLabel1 is a Label or Literal control in your ASPX page and FusionCharts.RenderChart is a function that accepts number of parameters, like chart type, chart XML data, dimensions etc.
It works very well until you want to render the chart inside of Microsoft Ajax UpdatePanel – then nothing works. This happens because FusionCharts.RenderChart function emits some HTML along with JavaScript that do not work during partial postback. FusionCharts suggest hooking up to UpdatePanel life-cycle events, but it’s seems like an overkill, and often doesn’t work (especially if you have a complex project, which this hookup can interfere with). But there’s an alternative solution.
Continue reading →