I am getting the following exception when scrolling a self referencing hierarchy grid.  I am using version 2010.3.10.1215.  Any suggestions or tips for working around this issue?

This only occurs after I expand the rows with:

WorkItemOneHopGridView.TableElement.BeginUpdate();

 

foreach (GridViewDataRowInfo row in WorkItemOneHopGridView.ChildRows)

{

    row.IsExpanded = true;

}

 

WorkItemOneHopGridView.TableElement.EndUpdate();

System.NullReferenceException was unhandled
  Message=Object reference not set to an instance of an object.
  Source=Telerik.WinControls.GridView
  StackTrace:
       at Telerik.WinControls.UI.GridTraverser.StepInHierarchyBackward()
       at Telerik.WinControls.UI.GridTraverser.MovePreviousCore()
       at Telerik.WinControls.UI.GridTraverser.MovePrevious()
       at Telerik.WinControls.UI.ItemScroller`1.ScrollUp(Int32 step)
       at Telerik.WinControls.UI.ItemScroller`1.thumbTimer_Tick(Object sender, EventArgs e)
       at System.Windows.Forms.Timer.OnTick(EventArgs e)
       at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at WorkItemWizard.Program.Main() in C:\TFS\WorkItemWizard\Program.cs:line 33
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException:

Hello.

My Some own class have EnumValue Property.

that is showing like a combobox.

but that combobox doesn work before press enter key.

My boss want see preview about change value(that value make some design to another control)
when change combobox value..

please tell me how i can use change value without enter key at enumValue.

Thank you...

Hi,

I have a long HeaderFormat string for day view but when I change the ActiveView I would like to change the HeaderFormat to a shorter string such as mm/dd.  I tried this in the ActiveViewChanged by doing the following without any luck.

Is it possible to do this?

Thank you.
David

Hi,
I have a fairly simple object model:


So a location can have any number of sub-locations,  and each location can have any number of printers.

I'd like to bind this to a RadTreeView, such that the 'Name' property of the location/printer is shown 

e.g
   Location#1
   Location#2
       Location#3
            Location#4
                 Printer#1
                 Printer#2
            Location#5
                 Printer#3

etc.

The object model is loaded from xml at the moment,  a sample of which can be seen here:



Can this be done with RadTreeView ???

Thanks.

Hi,

We are trying to replace a previous third party calendar control with your RadCalendar.  We have a calendar that is on a form that can be resized.  If the form is maximized, we expect the # of months (rows)  to increase.  The MultiViewRows looks like a fixed value, so we really don't know how many rows to display based on the resolution of the user.

Is there a way to make this function like Outlook where changing the window size automatically adjusts the number of months to display?

Thanks,
David

I am trying to create a line chart that will be filled in real-time over a 2hr time period. It will be something like PerfMon in that I will start with just 1 data point and each minute I will add a new one until I reach 2hrs, at which time the first data point is removed, and from then on I show the last 2hrs of data with the line data scrolling each minute.

I have made this work by simply adding to the list the chart is data bound to. But the xaxis changes every minute to accommodate the new data point, up until 2hrs. I'd like to preset the xaxis to show 2hrs in 1min increments even though I don't have data yet. Is this possible?

I thought about prefilling the databound list with values of 0, but then the line chart looks odd because it goes to zero for all future points. How else could I accomplish this?

Hi Every Body!!

I want to export to Excel in VS 2010 And Telerik 2011 Q3
But when doing Using Telerik.Wincontrol.UI.Export
I can't see ExportTo Excel Class And this Class is unknow for VS2010 Ultimate Version
But I Can see In VS2008 By Telerik 2008

Please Help Me!!!!

I have a piece of code that refreshes a RadTextBox Text property depending on external events. In order not to change the Text property while the user is typing in the text box I check the Focused property first and proceed in overwriting the Text property only if it is false, the relevant code looks like this:


However in Telerik 2010Q1 this does not seem to work. I have tried to check at runtime and apparently the Focused property is always false even though I am editing that particular text-box. I have made a super-simplified test case and tried it with both Telerik 2009Q3 and 2010Q1 and it works correctly under version 2009Q3 (Focused is set to true when I'm typing in the field) but not on 2010Q1. Is this a bug or is there another way to check if a specific control has the input focus?

As a temporary workaround I noticed that the FocusedElement property is null when the text-box doesn't have the input focus and points to the embedded RadTextBoxItem when it has focus so I'm using it instead. However because FocusedElement is not documented I am a bit wary of using it.

Hello,

I understand the RichTextBox in conjunction with a RibbonBar can be used to create an Editor for WinForms applications.  Can you direct me to any video detailing its capabilities.  I want to build an integrated Editor solution within the WinForms application and want to ensure I get most of the functionality you would get with MSWord such as paragraphs, formatting, bullets, tables, headers, footers etc.

Also I believe this is only available with framework 4.0?

Thank You,

Kerry

I've applied a theme to the application using  

All works as expected, my theme is applied.

Later on in the application, one specific RadButton needs to have a different theme applied programatically, say "MyThemeWarning"

So I try


but nothing changes, the button remains with the theme that was applied to the application. I have verified MyThemeWarning is being loaded by the ThemeResolutionService. 

What is the correct way to change the theme of a specific RadButton after the ApplicationThemeName has been set?