Hello, I'm trying to display a chart by salesperson, grouped by month, showing the total sales amount. I've attached a photo. I've tried many things without success. Thank you for your time.

I work with WinForms and VB.NET

Hello,

we have an application using Telerik version 2021.3.1123.40. It is not the first time these errors were reportet, but I have no methode to reproduce it at the moment. The chain of Events for both errors is, that RadGridView.FilterChanged-Event is called, from there we call our method "UpdateProzessschritte" (UpdateProcessSteps), which does a BeginUpdate and EndUpdate of the grid. When EndUpdate is called, the 2 errors orccured under certain, unknown conditions.

1. ERROR|TBM_HAProzessPlugin.MainForm|1|(null)| In Modul TBM|DNA - Digitaler Netzanschluss ist ein Fehler aufgetreten. System.InvalidOperationException: Die Auflistung wurde geändert. Der Enumerationsvorgang kann möglicherweise nicht ausgeführt werden.
      bei System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
      bei System.Collections.Generic.List`1.Enumerator.MoveNextRare()
      bei System.Collections.Generic.List`1.Enumerator.MoveNext()
      bei Telerik.WinControls.UI.DataGroup.<GetEnumerator>d__7.MoveNext()
      bei Telerik.WinControls.UI.GridViewGroupRowInfo.get_ChildRows()
      bei Telerik.WinControls.UI.GridViewRowInfo.HasChildRows()
      bei Telerik.WinControls.UI.GridTraverser.CanStepInHierarchy()
      bei Telerik.WinControls.UI.GridTraverser.StepInHierarchy()
      bei Telerik.WinControls.UI.GridTraverser.MoveNextCore()
      bei Telerik.WinControls.UI.GridTraverser.MoveNext()
      bei Telerik.WinControls.UI.GridTraverser.GoToRow(GridViewRowInfo row)
      bei Telerik.WinControls.UI.BaseGridNavigator.ProcessEventCore(GridViewEvent eventData)
      bei Telerik.WinControls.UI.BaseGridNavigator.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)
      bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
      bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
      bei Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewTemplate template, GridViewEvent eventData, Boolean postUI)
      bei Telerik.WinControls.UI.GridViewTemplate.DispatchEvent(GridViewEvent gridEvent, Boolean postUI)
      bei Telerik.WinControls.UI.GridViewTemplate.DispatchDataViewChangedEvent(Object sender, DataViewChangedEventArgs args)
      bei Telerik.WinControls.UI.GridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.MasterGridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.GridViewTemplate.EndUpdate(Boolean notify, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.MasterGridViewTemplate.EndUpdate(Boolean notify, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.GridViewTemplate.EndUpdate()
      bei Telerik.WinControls.UI.RadGridView.EndUpdate()
      bei TBM_HAProzessPlugin.MainForm.UpdateProzessschritte(RadGridView radGridView, RadDiagram radDiagram, Dictionary`2 prozessDauerListe, List`1 schritte) in C:\Program Files (x86)\Jenkins\jobs\TBM_DNA_Digitaler_Netzanschluss_WP\workspace\TBM_HAProzessPlugin\src\Forms\MainForm.cs:Zeile 510.
      bei TBM_HAProzessPlugin.MainForm.rgvHAAkten_FilterChanged(Object sender, GridViewCollectionChangedEventArgs e) in C:\Program Files (x86)\Jenkins\jobs\TBM_DNA_Digitaler_Netzanschluss_WP\workspace\TBM_HAProzessPlugin\src\Forms\MainForm.cs:Zeile 442.
   
   [Translation]: Collection was modified; enumeration operation may not execute
   
   
   
2. ERROR|TBM_HAProzessPlugin.MainForm|1|(null)| In Modul TBM|DNA - Digitaler Netzanschluss ist ein Fehler aufgetreten. System.ArgumentException: Ein Element mit dem gleichen Schlüssel wurde bereits hinzugefügt.
      bei System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
      bei System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
      bei System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
      bei Telerik.WinControls.Data.GroupBuilder`1.Perform(IReadOnlyCollection`1 items, Int32 level, Group`1 parent)
      bei Telerik.WinControls.Data.GroupBuilder`1.get_Groups()
      bei Telerik.WinControls.Data.RadDataView`1.get_Groups()
      bei Telerik.WinControls.UI.GridViewInfo.Refresh()
      bei Telerik.WinControls.UI.GridViewInfo.get_ChildRows()
      bei Telerik.WinControls.UI.GridViewTemplate.get_ChildRows()
      bei Telerik.WinControls.UI.ViewInfoTraverser.SetCollectionForStage(Boolean initializeCollection)
      bei Telerik.WinControls.UI.ViewInfoTraverser.ChangeCollectionForward()
      bei Telerik.WinControls.UI.ViewInfoTraverser.MoveNextCore()
      bei Telerik.WinControls.UI.ViewInfoTraverser.MoveNext()
      bei Telerik.WinControls.UI.GridTraverser.MoveNextCore()
      bei Telerik.WinControls.UI.GridTraverser.MoveNext()
      bei Telerik.WinControls.UI.GridTraverser.GoToRow(GridViewRowInfo row)
      bei Telerik.WinControls.UI.BaseGridNavigator.ProcessEventCore(GridViewEvent eventData)
      bei Telerik.WinControls.UI.BaseGridNavigator.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)
      bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
      bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
      bei Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewTemplate template, GridViewEvent eventData, Boolean postUI)
      bei Telerik.WinControls.UI.GridViewTemplate.DispatchEvent(GridViewEvent gridEvent, Boolean postUI)
      bei Telerik.WinControls.UI.GridViewTemplate.DispatchDataViewChangedEvent(Object sender, DataViewChangedEventArgs args)
      bei Telerik.WinControls.UI.GridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.MasterGridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.GridViewTemplate.EndUpdate(Boolean notify, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.MasterGridViewTemplate.EndUpdate(Boolean notify, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.GridViewTemplate.EndUpdate()
      bei Telerik.WinControls.UI.RadGridView.EndUpdate()
      bei TBM_HAProzessPlugin.MainForm.UpdateProzessschritte(RadGridView radGridView, RadDiagram radDiagram, Dictionary`2 prozessDauerListe, List`1 schritte) in C:\Program Files (x86)\Jenkins\jobs\TBM_DNA_Digitaler_Netzanschluss_WP\workspace\TBM_HAProzessPlugin\src\Forms\MainForm.cs:Zeile 510.
      bei TBM_HAProzessPlugin.MainForm.rgvHAAkten_FilterChanged(Object sender, GridViewCollectionChangedEventArgs e) in C:\Program Files (x86)\Jenkins\jobs\TBM_DNA_Digitaler_Netzanschluss_WP\workspace\TBM_HAProzessPlugin\src\Forms\MainForm.cs:Zeile 442.
   
   [Translation]: Item with Same Key has already been added

Do you have any ideas which causes could lead to this exceptions and how to fix it? Or is this a known problem which was already fixed in later versions?

I have a WinForms .NET project running Telerik Version 2022.1.222.40 (I know its old but its what I have). Everything is working as expected and the application has no apparent problems at runtime.

After migrating to VS 2022 I am seeing various errors in the output. These errors appears to correspond with the loading of various Telerik components, the first of which is the theme but others include the Pageview control.

The following error is repeated at each of these times:-

Microsoft C++ exception: EEFileLoadException at memory location 0x000000ED451FB450.

Microsoft C++ exception: [rethrow] at memory location 0x0000000000000000.

Any help appreciated.

G

Hello,

VirtualKeyboard (WinForms) on Windows 11 with touchscreen monitor when key touched with finger quite often keeps stuck and repeats input until another key is pressed or mouse leaves that button.

Thats new for Windows 11 (on previous versions that was not happening).

It only happens when physically touched on touchscreen and in Windows 11. If pressed with mouse it does not happening.

To reproduce can be used Telerik demo app > Virtual Keyboard > First Look (please see attached image of my test, button g is pressed and released, but gggggg input keeps appending)

Environment Windows 11 Pro 24H2 with touchscreen monitor.

Also tested on my app with Telerik UI For WinForms 2025.3.812 (the same outcome).

Is there plans to fix this? Or maybe there is a workaround?

Mindaugas

I am testing the RadDock control (2025 Q2 version).
The Dock property of dock is set to Fill.
After applying the layout with dock.LoadFromXml(xmlPath, clearDocking: false);, when the MDI main form is resized, the laid-out window does not fill the client area (as indicated by the red arrow in the figure). How can I modify it so that the laid-out window fills the client area of the MDI window?

Good morning,

in VirtualGrid is there a way to reset to the default filter operator for each column when using grid.FilterDescriptors.Clear()?

For example if the user has changed the operator to "EndsWith" in one column and "StartsWith" in another one, I would like to reset them to "Contains" when clearing filters.

It seems that the method grid.FilterDescriptors.Clear() clear only the filters values.

Thank you.

Emanuele

Hi, my application is built on .NET 4 and Telerik 2023. However, after the update, I have experienced increased lag when loading radGridView What should I do?

Hello,

I want to add a custom button to the right side of the BreadCrumb control.

The documentation says it's possible.

How can I do this?

Thanks.

Hi everyone,

I have a website: gatewayabroadeducations.com which has a total of around 280 pages, including blog posts. All these pages are correctly listed in the sitemap, and the sitemap is submitted in Google Search Console.

However, when I search on Google using the operator site:gatewayabroadeducations.com, I can only see about 29 pages indexed. Most of the blog posts and some other pages are not appearing in the Google search results.

I’ve checked:

• The pages are in the sitemap

• Pages are not blocked by robots.txt

• Pages return a 200 status (not 404 or 301)

• Canonical tags seem correct

• No manual action in Search Console

I can't figure out why the remaining pages aren’t being indexed. Could this be due to:

• Low-quality or duplicate content?

• Crawl budget issues?

• Internal linking problems?

• Something else I might be missing?

Any help or suggestions to diagnose and fix this would be appreciated.

Thanks in advance!