Hi Guys,

We seem to be unable to go around a problem on rebinding rad-grid, while moving columns. Please, advise.


We have a rad-grid, which constantly is being re-binded with the code below (the code below is running on the main thread). While this rebinding is going on, a person is reordering the columns, fast (don't know why they do it..) and at some point of time an exception is thrown and the rad-grid gets replaced by a red crossed rectangle. We cannot refresh or recover the grid - hence the user has no choice but to restart the program.
 
Private Sub ReBindMe()
        Dim ds As New DataSet
        Try
            If Not gridTasks.IsInEditMode Then
                If TypeOf gridTasks.DataSource Is DataSet And gridTasks.InvokeRequired = False Then
                    '--------------- ERROR HAPPENS ON THE LINE BELOW -------------------
                    CType(gridTasks.DataSource, DataSet).Tables("SELECT_TASKS").Clear()
                    CType(gridTasks.DataSource, DataSet).Tables("GetCheckListTriggeredLogDocList").Clear()
                    CType(gridTasks.DataSource, DataSet).Tables("GetCheckListTriggeredLogDocList").Merge(dt_GetCheckListTriggeredLogDocList)
                    CType(gridTasks.DataSource, DataSet).Tables("SELECT_TASKS").Merge(dt_Tasks)
                End If
            End If
        Catch ex As System.Exception
            'Throws error
        End Try
    End Sub
---------------------------------------------------------------------------------------------------------------------------
System Error Message:
Object reference not set to an instance of an object.
Stack trace:
   at Telerik.WinControls.RadElement.ComposeShouldPaintSystemSkin()
   at Telerik.WinControls.RadElement.ShouldPaintSystemSkin()
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintOverride(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.VisualElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.UI.GridRowElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.UI.GridTableBodyElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.VisualElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.VisualElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RootRadElement.Paint(IGraphics graphics, Rectangle clipRectangle)
   at Telerik.WinControls.RadControl.OnPaint(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at Telerik.WinControls.SafeNativeMethods.RedrawWindow(IntPtr hWnd, IntPtr rectUpdate, IntPtr hRgnUpdate, UInt32 uFlags)
   at Telerik.WinControls.UI.ThemedFormBehavior.RefreshNC()
   at Telerik.WinControls.UI.ThemedFormBehavior.OnWMNCActivate(Message& m)
   at Telerik.WinControls.UI.ThemedFormBehavior.HandleWndProc(Message& m)
   at Telerik.WinControls.UI.RadFormBehavior.HandleWndProc(Message& m)
   at Telerik.WinControls.UI.RadFormControlBase.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.IntDestroyWindow(HandleRef hWnd)
   at System.Windows.Forms.UnsafeNativeMethods.DestroyWindow(HandleRef hWnd)
   at System.Windows.Forms.NativeWindow.DestroyHandle()
   at System.Windows.Forms.Control.DestroyHandle()
   at System.Windows.Forms.Control.Dispose(Boolean disposing)
   at System.Windows.Forms.ContainerControl.Dispose(Boolean disposing)
   at System.Windows.Forms.Form.Dispose(Boolean disposing)
   at System.ComponentModel.Component.Dispose()
   at Telerik.WinControls.UI.GridHeaderCellElement.DisposeManagedResources()
   at Telerik.WinControls.DisposableObject.PerformDispose(Boolean disposing)
   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)
   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)
   at Telerik.WinControls.RadElement.DisposeChildren()
   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)
   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)
   at Telerik.WinControls.RadElement.DisposeChildren()
   at Telerik.WinControls.UI.GridTableBodyElement.CleanupRows()
   at Telerik.WinControls.UI.GridTableElement.Update_Reset(GridUINotifyAction action, GridViewRowInfo[] rowInfos)
   at Telerik.WinControls.UI.GridTableElement.UpdateCore(GridUINotifyAction action, GridViewRowInfo[] rowInfos)
   at Telerik.WinControls.UI.GridTableElement.Update(GridUINotifyAction action, GridViewRowInfo[] rowInfos)
   at Telerik.WinControls.UI.GridViewTemplate.UpdateUI(GridUINotifyAction action, GridViewRowInfo[] rowInfos)
   at Telerik.WinControls.Data.DataAccessComponent.UpdateAll(GridUINotifyAction action, GridViewRowInfo[] rowInfos)
   at Telerik.WinControls.UI.GridViewTemplate.Update(GridUINotifyAction action)
   at Telerik.WinControls.Data.DataAccessComponent.InitDataGrid()
   at Telerik.WinControls.Data.DataAccessComponent.currencyManager_ListChanged(Object sender, ListChangedEventArgs e)
   at System.Windows.Forms.CurrencyManager.OnListChanged(ListChangedEventArgs e)
   at System.Windows.Forms.CurrencyManager.List_ListChanged(Object sender, ListChangedEventArgs e)
   at System.Data.DataView.OnListChanged(ListChangedEventArgs e)
   at System.Data.DataView.IndexListChanged(Object sender, ListChangedEventArgs e)
   at System.Data.DataView.IndexListChangedInternal(ListChangedEventArgs e)
   at System.Data.DataViewListener.IndexListChanged(ListChangedEventArgs e)
   at System.Data.Index.<OnListChanged>b__2(DataViewListener listener, ListChangedEventArgs args, Boolean arg2, Boolean arg3)
   at System.Data.Listeners`1.Notify[T1,T2,T3](T1 arg1, T2 arg2, T3 arg3, Action`4 action)
   at System.Data.Index.OnListChanged(ListChangedEventArgs e)
   at System.Data.Index.FireResetEvent()
   at System.Data.Index.Reset()
   at System.Data.DataTable.ResetInternalIndexes(DataColumn column)
   at System.Data.DataTable.Clear(Boolean clearAll)
   at System.Data.DataTable.Clear()
   at ...................................................... line ...x

Hi,

I tried out the the RadMarkupDialog. When I paste HTML code (e.g. copied from Visual Studio source code editor) I get the following exception:

System.Reflection.TargetInvocationException: NullReferenceException... 

bei Telerik.WinControls.UI.RadMarkupEditor.fontSizeCombo_SelectedIndexChanged(Object sender, EventArgs e)
bei Telerik.WinControls.UI.RadComboBoxElement.OnSelectedIndexChanged(EventArgs e)
bei Telerik.WinControls.UI.ComboPopupForm.listBoxElement_SelectedIndexChanged(Object sender, EventArgs e)
bei Telerik.WinControls.UI.RadListBoxElement.OnSelectedIndexChanged(SelectedIndexChangedEventArgs e)
bei Telerik.WinControls.UI.RadListBoxElement.DispatchSelectionEvents(Boolean selectedIndex, Boolean selectedItem, Object oldValue)
bei Telerik.WinControls.UI.RadListBoxElement.SetSelectedItem(Object value, Boolean fireEventsParam)
bei Telerik.WinControls.UI.RadListBoxElement.set_SelectedItem(Object value)
bei Telerik.WinControls.UI.RadListBoxElement.SetSelectedValue(Object value)
bei Telerik.WinControls.UI.RadMarkupEditor.OnBodyInteraction()
bei Telerik.WinControls.UI.RadMarkupEditor.OnBodyInteraction(Object sender, HtmlElementEventArgs e)
bei System.Windows.Forms.HtmlElementEventHandler.Invoke(Object sender, HtmlElementEventArgs e)
--- Ende der internen Ausnahmestapelüberwachung ---
bei System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
bei System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
bei System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
bei System.Delegate.DynamicInvokeImpl(Object[] args)
bei System.Windows.Forms.HtmlShim.FireEvent(Object key, EventArgs e)

It seams that if the font size combobox doesn't have the pasted font size, no element is selected and this results in the exception. 

Regards

Martin

Hi Telerik team,

In my application I'm using the Hierarchy grid view.I want to set the tool tip for a particular cell of child gridvew.
Please suggest how to assign it,using the Cell Formatting event we are able to set the tool tip for the Mastergridview rows.but unable to set for the cells of child grid.

Please find theattached  screenshot.

Thank s
Pradeep.

When the RadPageView control is in the Outlook view, and the Page's are collapsed down into the bar with just icons.  When clicking on those icons to change the Selected Page, the SelectedPageChanging and SelectedPageChanged events are not invoked.

How can I put a RadComboBox into a radGridView?

Hi,


I'm using 2009.2.9.729 version of Telerik WinForms on Windows 7. When validating using RowValidating event, I have some problems with it:   1) If the user cliks in some areas, like shadow area around expanded group, it doesn't fire, so its imposible to validate the data in row's cells. 2) when adding a new row, it doesn't have the new data in the e.row parameter, all cells values equal "nothing". 3)Whe enter key es pressed, the RowValidating fires, but the new row is added to datasource even if cancel is set to true.

Thanks .......  

Hi,
I'd like to find a radbuttonelement on a ribbonbar to set it's enabled property (disable menu items which the user is not allowed to use).


I tried this:

FindControl("rbeAdmin").Enabled =True

using this function:

Private Function FindControl(ByVal strControlName As String) As Control

 

 

If ((strControlName.Length = 0) _

 

 

OrElse (Me.Controls.Find(strControlName, True).Length = 0)) Then

 

 

Return Nothing

 

 

End If

 

 

Return Me.Controls.Find(strControlName, True)(0)

 

 

End Function

But the default me.controls.find does not find the nested telerik controls. Has anyone a smart idea on how find these controls by name?
thnx!

 

 

 
 

 

Hello,

Is there any possibility to use columns and groups in RadListView control like in standard ListView?
I didn't find such properties and methods in RadListView control.

Thanks

Hi all,

In the FirstLook example of the RadScheduler of Q2 release of 2010 you are using images in the PageView.
I attached one of those images. I would like to know how to create this in code.

For example which controls should I use to create the item "My Notes" or the item "Current View"

Gerben

Hi.

First of all thanks for the conversion wizard for old controls in last week release 2010.2.10.806.

Please can you confirm that if you convert e.g. one control the name of the control is changed to the default name like if you create the
control completly new, meaning e.g. "CustomerType_ComboBox" is renamed to "radDropDownList1".

This is causing a lot effort because you only change the name of the control in Form.Designer.cs files an not in the corresponding Form.cs file. In big form controls you have than to change a lot manually by yourself.

A workaround is to manually change every control one by one after another and copy/paste the name of the control, convert and directly change the name back from "radDropDownList1" to "CustomerType_ComboBox". But for 50 controls on one form having already 50 forms in the project will cause a lot manual effort.

So please tell me if this is considered as "normal" behavior or is a bug which will be fixed.

All the best.

Adrian.