i am getting a null reference exception with the following call stack:
Description: The process was terminated due to an unhandled exception.
Exception Info: System.NullReferenceException
at Telerik.WinControls.UI.TableViewRowLayoutBase.GetRowHeight(Telerik.WinControls.UI.GridViewRowInfo)
at Telerik.WinControls.UI.RowElementProvider.GetElementSize(Telerik.WinControls.UI.GridViewRowInfo)
at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetScrollHeight(System.__Canon)
at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ScrollDown(Int32)
at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ScrollTo(Int32)
at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].scrollbar_ValueChanged(System.Object, System.EventArgs)
at Telerik.WinControls.UI.RadScrollBarElement.OnValueChanged(Int32, Int32)
at Telerik.WinControls.UI.RadScrollBarElement.set_Value(Int32)
at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].UpdateScrollValue()
at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].UpdateScrollRange()
at Telerik.WinControls.UI.RowScroller.UpdateScrollRange()
at Telerik.WinControls.UI.GridTableElement.UpdateNoDataText()
at Telerik.WinControls.UI.GridTableElement.UpdateAll()
at Telerik.WinControls.UI.GridTableElement.UpdateViewCore(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)
at Telerik.WinControls.UI.GridTableElement.UpdateView(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)
at Telerik.WinControls.UI.GridTableElement.ProcessTemplateEvent(Telerik.WinControls.UI.GridViewEvent)
at Telerik.WinControls.UI.GridTableElement.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(Telerik.WinControls.UI.GridViewEvent)
at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(Telerik.WinControls.UI.GridViewEvent, Telerik.WinControls.UI.PriorityWeakReferenceList, Telerik.WinControls.UI.GridEventProcessMode)
at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(Telerik.WinControls.UI.GridViewEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(Telerik.WinControls.UI.GridViewEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(Telerik.WinControls.UI.GridViewEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(Telerik.WinControls.UI.GridViewTemplate, Telerik.WinControls.UI.GridViewEvent, Boolean)
at Telerik.WinControls.UI.GridViewTemplate.DispatchEvent(Telerik.WinControls.UI.GridViewEvent, Boolean)
at Telerik.WinControls.UI.GridViewTemplate.DispatchDataViewChangedEvent(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)
at Telerik.WinControls.UI.GridViewTemplate.OnViewChanged(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)
at Telerik.WinControls.UI.MasterGridViewTemplate.OnViewChanged(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)
at Telerik.WinControls.UI.GridViewTemplate.EndUpdate(Boolean, Telerik.WinControls.UI.DataViewChangedEventArgs)
at Telerik.WinControls.UI.MasterGridViewTemplate.EndUpdate(Boolean, Telerik.WinControls.UI.DataViewChangedEventArgs)
at Telerik.WinControls.UI.GridViewTemplate.set_RowCount(Int32)
at Telerik.WinControls.UI.RadGridView.set_RowCount(Int32)
at Communication_Logger.frmCommunicationLogger.RadRibbonForm1_OnDataReceived(Communication_Logger.Data)
at Communication_Logger.ChannelClass.Serial_DataReceived(System.Object, System.IO.Ports.SerialDataReceivedEventArgs)
at System.IO.Ports.SerialPort.CatchReceivedEvents(System.Object, System.IO.Ports.SerialDataReceivedEventArgs)
at System.IO.Ports.SerialStream+EventLoopRunner.CallReceiveEvents(System.Object)
at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
the setup is a dotNet 4.5.2 winforms application with RadGridView in virtual mode.
The exception occur when the application is left working for days (2 in this case) without any user interaction.
The application normally updates a list that is used by the gridview, the list records are added and removed continuously, the grid view RowCount is updated via a timer.
i suspect that the RowCount reported at one point in time doesn't match the list size as it is trimmed, and therfore the GetRowHeight fails as the data doesn't exist - can this be handled in the gridview - to avoid a termination of the process due to the exception ?
regards,
guy.
Hi,
Using the last release of RadSpreadsheet, I get an exception when the first row is hidden when scrolling with the mousewheel. Attached is a demo.
Thanks,
Megan
Hello,
I have downloaded the latest winform version today and launched my application.
I experienced an immediate crash while replacing a document container by a split container.
You can see the small piece of code and the insttruction which is causing the crash ....
Obviously it was working properly before upgrading ...
Can you help? I am now just stuck so a fix or a workaround would be useful...
Thanks,
Olivier D.
if (ctrlOutput == null)
{
Telerik.WinControls.UI.RadSplitContainer mainSplitContainer = null;
ctrlOutput = new ToolWindowOutput(sbOutput);
var Output = new Telerik.WinControls.UI.Docking.ToolWindow();
Output.Text = "Output";
Output.Controls.Add(ctrlOutput);
var toolTabStrip = new Telerik.WinControls.UI.Docking.ToolTabStrip();
toolTabStrip.Controls.Add(Output);
if (this.documentContainer1.Parent == this.radDock1)
{
>>>>>>>>>>>>>>>>>>>>>>>>>>>>
this.radDock1.Controls.Remove(this.documentContainer1); <<<< CRASH HERE
>>>>>>>>>>>>>>>>>>>>>>>>>>>>
// need to remplace document container by a split container
mainSplitContainer = new Telerik.WinControls.UI.RadSplitContainer();
mainSplitContainer.Orientation = System.Windows.Forms.Orientation.Horizontal;
mainSplitContainer.Controls.Add(this.documentContainer1);
this.radDock1.Controls.Add(mainSplitContainer);
}
else
{
mainSplitContainer = (Telerik.WinControls.UI.RadSplitContainer)this.documentContainer1.Parent;
}
mainSplitContainer.Controls.Add(toolTabStrip);
I was already using telerik 2015 version. that was everything ok. Until I decided to upgrade to 2019 version.
I noticed that the new version is having a problem.
When RadDock Using In RightToLeft mode DocumentTabStrip Window apperance corrupted.
I uploaded sample projects for guidance.
Please help me.
My problem is acute.
Sub New()
InitializeComponent()
Me.RadTreeView1.Nodes.Clear()
Me.RadTreeView1.CheckBoxes = True
Dim node = New RadTreeNode("1") With {.CheckType = CheckType.CheckBox, .Checked = True, .CheckState = ToggleState.Indeterminate}
RadTreeView1.Nodes.Add(node)
node.Nodes.Add(New RadTreeNode("1.1") With {.CheckType = CheckType.RadioButton, .Checked = True, .CheckState = ToggleState.Indeterminate})
node.Nodes.Add(New RadTreeNode("1.2") With {.CheckType = CheckType.RadioButton})
node.Nodes.Add(New RadTreeNode("1.3") With {.CheckType = CheckType.RadioButton})
node = New RadTreeNode("2") With {.CheckType = CheckType.CheckBox, .Checked = True, .CheckState = ToggleState.Indeterminate}
RadTreeView1.Nodes.Add(node)
RadTreeView1.Nodes.Add(New RadTreeNode("3"))
End Sub
Workaround:
Sub New()InitializeComponent()
Me.RadTreeView1.Nodes.Clear()
Me.RadTreeView1.CheckBoxes = True
Dim node = New RadTreeNode("1") With {.CheckType = CheckType.CheckBox, .Checked = True, .CheckState = ToggleState.Indeterminate}
RadTreeView1.Nodes.Add(node)
node.Nodes.Add(New RadTreeNode("1.1") With {.CheckType = CheckType.RadioButton, .Checked = True, .CheckState = ToggleState.Indeterminate})
node.Nodes.Add(New RadTreeNode("1.2") With {.CheckType = CheckType.RadioButton})
node.Nodes.Add(New RadTreeNode("1.3") With {.CheckType = CheckType.RadioButton})
node = New RadTreeNode("2") With {.CheckType = CheckType.CheckBox, .Checked = True, .CheckState = ToggleState.Indeterminate}
RadTreeView1.Nodes.Add(node)
RadTreeView1.Nodes.Add(New RadTreeNode("3"))
Me.RadTreeView1.ExpandAll()
End Sub
Private Sub RadForm1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.RadTreeView1.CollapseAll()
End Sub
When you drag a RadDateTimePicker from the Toolbox and drop it onto the form, the TabStop property is false by default. If you change it in the Properties grid to true and save the form, try to open the form designer again. As a result the TabStop property is set to false as if no changes have been performed.
Recently OpenStreetMap changed their tile usage policy and require UserAgent string in the web headers for accessing tile.openstreetmap.org tiles.
https://operations.osmfoundation.org/policies/tiles/
As a result, standard open street map mode does not work - no tiles are loaded and "too many requests" error is returned from the server.
RadMap's OpenStreetMapProvider needs API (event, property or similar) for easier set up of UserAgent / Referer / other headers of web requests.
When a set of RadForms is used inside an MDI Form and are maximized, after some time, the child forms flicker continuously.
See the attached video.
The same behaviour DOES NOT happen when regular Windows Form is used.
Please follow the steps:
1. Run the attached sample project.
2. Move the form to a monitor with 125% DPI scaling.
3. Resize the form to make the spreadsheet bigger. You will notice that the column/row headers are missing for the last column/row headers.
Backgroud
The behavior of split button makes me confused when I use split button collapsing the split panel. It locates in different position when I restore the split button by double-click. What's weirder is that double-click will make no effect when the split button located on the edge. I don't like these default behaviours.
Question
1. Do you know how to overwrite the default behaviour of split button?
2. Is there a virtual method or some event I can reimplement?
3. I want to collapse the right panel to the right side, and restore it to the initial location, and just these to behaviours. How can I do it?
Thanks!
Hi,
I am working with the RadGridView in my c# winform application. I am using the custom font ("Font Awesome 5 Free Solid") for the RadGridView using the "CellFormatting" event to view the icons along with the text. Here i am able to see the proper icons with text but when i open the filter menu to filter out the rows, i am unable to see the icons (icons shown as the box) as in filterbox we don't have any custom font.
I tried to working out the properties of the RadTreeNodeCollection but here we dont have any Custom font property for the same.
i want to show the text as it is in the filterbox along with the text and the icon.
so can you suggest what i can do to view the icons in the filterbox?
Check the attachment for reference.
Check the attached screenshot:
Hi,
when I select the column chooser multiple times via context menu, the column chooser dialog scales multiple times.
Reproduced here with the Telerik sample application. 150 % dpi scaling.
Regards
Erwin
Workaround:
this.radChat1.ChatElement.InputTextBox.TextBoxItem.TextBoxControl.Multiline = true;
this.radChat1.ChatElement.InputTextBox.ButtonsStack.Children.Remove(this.radChat1.ChatElement.ShowToolbarButtonElement);
this.radChat1.ChatElement.InputTextBox.ButtonsStack.Children.Remove(this.radChat1.ChatElement.SendButtonElement);
StackLayoutElement stack = new StackLayoutElement();
stack.MinSize = new Size(0, 60);
this.radChat1.ChatElement.InputTextBox.Parent.Children.Add(stack);
this.radChat1.ChatElement.InputTextBox.Parent.Children.Remove(this.radChat1.ChatElement.InputTextBox);
stack.StretchHorizontally = true;
stack.Orientation = Orientation.Horizontal;
stack.Children.Add(this.radChat1.ChatElement.InputTextBox);
stack.Children.Add(this.radChat1.ChatElement.ShowToolbarButtonElement);
stack.Children.Add(this.radChat1.ChatElement.SendButtonElement);
this.radChat1.ChatElement.ShowToolbarButtonElement.StretchHorizontally = false;
this.radChat1.ChatElement.SendButtonElement.StretchHorizontally = false;
I'm just starting with RadGridView and trying to figure out how to create a combobox column inside my RadGridView. I've added a column that is of type GridViewComboBoxColumn. I've created a BindingSource that Contains the values for the combobox. I can't figure out how to set the datasource property of the Column to use that BindingSource. Google search says to set the datasource property but when I'm going through the "Open Properties Builder" and I select my combobox column I don't see that property listed under advanced for the column.
Thanks
Lee
Please refer to the attached sample project and the follow the steps in the gif file.
Workaround: scroll to the top and then to the bottom again to update the scrollbar's range