What is the best way to undo a drag/drop of a pageviewPage? I have some business rules that need to be enforced either before,during, or after a user tries to rearrange the tabs.

Thanks

 

Hello How can I display the ScreenTip for a DropDownList? I would be grateful for a hint. With kind regards Hello How can I display the ScreenTip for a DropDownList? I would be grateful for a hint. With kind regards Christian Rudat

Hi,

I'm using the ListBox control with the Scheduler one, so when the user drags an item with description from the ListBox and drops it into the scheduler a new appointment is created. I saw the Demo you provide, however, this one uses plain RadListDataItem and RadListVisualItem. On the description of each item there's a phone number. I have created a new "Add Appointment" form to hold the phone number. My Question is: how can I Drag&Drop ListBox Items with descriptions and retrieve not only the Item text but the description too?

I've tried the following code, but "item" is always null.

Private Sub radListBox1_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs)
    If e.Button <> MouseButtons.Left Then
        Return
    End If
 
    If Me.isDragging Then
        Return
    End If
 
    Dim currentPosition As Point = e.Location
 
    If (Math.Abs(currentPosition.X - Me.mouseDownPosition.X) >= SystemInformation.DragSize.Width) OrElse (Math.Abs(currentPosition.Y - Me.mouseDownPosition.Y) >= SystemInformation.DragSize.Height) Then
        Me.isDragging = True
        Dim dragObject As New DragObject()
        Dim item As DescriptionTextListVisualItem = TryCast(Me.LBox1.ElementTree.GetElementAtPoint(e.Location), DescriptionTextListVisualItem)
 
        If item IsNot Nothing Then
            dragObject.Values.Add(AppointmentFields.Summary, item.Text)
            dragObject.Values.Add(AppointmentFields.Description, item.DescriptionText)
 
            dragObject.Status = AppointmentFields.Summary
 
            TryCast(sender, RadListControl).DoDragDrop(dragObject, DragDropEffects.Copy)
        End If
    End If
End Sub

Thank you very much for your time and attention,
Matias.

Hi, 

I have RadDock with docked window to the left side. State of this window is auto-hidden. This window has one control RadTreeView which has assigned ContextMenuStrip. This ContextMenuStrip have menu with sub-menu items.
In this case when I open menu and click at any sub-menu item (level 2 or deeper), my window hides, and event from menu item isn't fires. I'm using Controls from Q3 SP1

P.S. If I click at pin button, to avoid window auto-hide, then everything works well.

What should I do? Is there a workaround for this issue?

Is there a DateTimeCategorial Axis for WinForms implementation of ChartView?   I'm bringing in a DataTable who CategorialValue is a field that's a date, but it's sorting it as if it's a string.

Also, after upgrading to Q2, I seem to no longer have "RadChart" in my toolbox.   Would really like to go back to using RadChart based on how extremely limited the functionality of ChartView is.

Thanks

Rob.

Hello,
I fail to assign a specific value to the tooltiptext of a drop down list,
in the past I used  the Tooltiptextneed event as follows
:
    Private Sub ddCountry_ToolTipTextNeeded(sender As Object, e As Telerik.WinControls.ToolTipTextNeededEventArgs) Handles ddCountry.ToolTipTextNeeded
        e.ToolTipText = ddCountry.SelectedItem("Label")
    End Sub

But is seemed to be not working anymore

I tried the following:

    Private Sub ddCountry_VisualListItemFormatting(sender As Object, args As VisualItemFormattingEventArgs) Handles ddCountry.VisualListItemFormatting
        args.VisualItem.ToolTipText = ddCountry.SelectedItem("Label")
    End Sub

But the selected index seems to be always "0" ant not the index of the Item on which I want to set the tooltip

How Should I set the tooltiptext to display the desired text ?

Thanks in advance
 

hi, i am trying q3 sp1.

i have function:

public void UpdateData()
{

this.CategoryView.AllowAddNewRow = false;
this.CategoryView.TableElement.RowHeight = 40;
this.CategoryView.ReadOnly = true;
this.CategoryView.TableElement.RowSpacing = 2;
this.CategoryView.TableElement.ShowSelfReferenceLines = true;
this.CategoryView.SelectionMode = Telerik.WinControls.UI.GridViewSelectionMode.FullRowSelect;

this.CategoryView.MasterTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
    DataTable source = CreateDataSource();    // this function work correct
if (this.CategoryView.DataSource != null)
{
string s = this.CategoryView.DataSource.ToString();           // s has a value
}
this.CategoryView.DataSource = source;  ///!!!!!!!!!!!!!!!!!!!!here i have problem  "Object reference not set to an instance of an object."

this.CategoryView.MasterTemplate.SortDescriptors.Add("lastupdate", ListSortDirection.Descending);
this.CategoryView.Relations.AddSelfReference(this.CategoryView.MasterTemplate, "id", "parent_id");
this.CategoryView.Columns["id"].IsVisible = false;
this.CategoryView.Columns["sn"].IsVisible = false;
this.CategoryView.Columns["parent_id"].IsVisible = false;
this.CategoryView.Columns["is_comment"].IsVisible = false;
this.CategoryView.Columns["fulltext"].IsVisible = false;
this.CategoryView.Columns["pubdate"].IsVisible = false;
this.CategoryView.Columns["source"].IsVisible = false;
this.CategoryView.Columns["category"].IsVisible = false;
this.CategoryView.Columns["lastupdate"].IsVisible = false;
this.CategoryView.Columns["title"].WrapText = true;
    }

the problem start from the second call of function, first call work fine:

System.NullReferenceException не обработано пользовательским кодом
Message="Object reference not set to an instance of an object."
Source="Telerik.WinControls.GridView"
StackTrace:
at Telerik.WinControls.UI.GridViewCellInfoCollection.get_Item(String name)
at Telerik.WinControls.UI.GridDataCellElement.UpdateInfoCore()
at Telerik.WinControls.UI.GridCellElement.UpdateInfo()
at Telerik.WinControls.UI.GridTableElement.UpdateCellContentByColumn(GridViewColumn column)
at Telerik.WinControls.UI.GridTableElement.UpdateViewCore(Object sender, DataViewChangedEventArgs args)
at Telerik.WinControls.UI.GridTableElement.UpdateView(Object sender, DataViewChangedEventArgs args)
at Telerik.WinControls.UI.GridTableElement.ProcessTemplateEvent(GridViewEvent eventData)
at Telerik.WinControls.UI.GridTableElement.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)
at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(GridViewEvent gridEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewTemplate template, GridViewEvent eventData, Boolean postUI)
at Telerik.WinControls.UI.GridViewSelfReferenceDataProvider.DispatchDataViewChangedEvent(DataViewChangedEventArgs args)
at Telerik.WinControls.UI.GridViewSelfReferenceDataProvider.Refresh()
at Telerik.WinControls.UI.GridViewTemplate.Telerik.WinControls.Data.IDataItemSource.Initialize()
at Telerik.WinControls.Data.RadListSource`1.Initialize()
at Telerik.WinControls.Data.RadListSource`1.Bind(Object dataSource, String dataMember)
at Telerik.WinControls.Data.RadListSource`1.set_DataSource(Object value)
at Telerik.WinControls.UI.GridViewTemplate.set_DataSource(Object value)
at Telerik.WinControls.UI.RadGridView.set_DataSource(Object value)
at AgroCenterCommunity.LawsForm.UpdateData() in C:\Documents and Settings\mxL\My Documents\Visual Studio 2008\Projects\ACK_01\ACK_01\LawsForm.cs:line 246
at AgroCenterCommunity.LawsForm.LawsForm_Load(Object sender, EventArgs e) in C:\Documents and Settings\mxL\My Documents\Visual Studio 2008\Projects\ACK_01\ACK_01\LawsForm.cs:line 221
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.Form.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.IntCreateWindowEx(Int32 dwExStyle, String lpszClassName, String lpszWindowName, Int32 style, Int32 x, Int32 y, Int32 width, Int32 height, HandleRef hWndParent, HandleRef hMenu, HandleRef hInst, Object pvParam)
at System.Windows.Forms.UnsafeNativeMethods.CreateWindowEx(Int32 dwExStyle, String lpszClassName, String lpszWindowName, Int32 style, Int32 x, Int32 y, Int32 width, Int32 height, HandleRef hWndParent, HandleRef hMenu, HandleRef hInst, Object pvParam)
at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp)
InnerException:

"string s" return a value, but then on next line VS2008 tell, that "Object reference not set to an instance of an object."

Need help.

insert
CategoryView.MasterTemplate.Reset();  before  DataTable source = CreateDataSource();
and have this:

System.Reflection.TargetInvocationException не обработано
Message="Exception has been thrown by the target of an invocation."
Source="mscorlib"
StackTrace:
at System.RuntimeMethodHandle._InvokeConstructor(Object[] args, SignatureStruct& signature, IntPtr declaringType)
at System.RuntimeMethodHandle.InvokeConstructor(Object[] args, SignatureStruct signature, RuntimeTypeHandle declaringType)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at Telerik.WinControls.UI.GridRowElement.CreateCell(GridViewColumn column)
at Telerik.WinControls.UI.GridDataRowElement.CreateCell(GridViewColumn column)
at Telerik.WinControls.UI.CellElementProvider.CreateElement(GridViewColumn data, Object context)
at Telerik.WinControls.UI.CellElementProvider.GetElement(GridViewColumn data, Object context)
at Telerik.WinControls.UI.BaseVirtualizedContainer`1.UpdateElement(Int32 position, T data)
at Telerik.WinControls.UI.BaseVirtualizedContainer`1.MeasureElements()
at Telerik.WinControls.UI.BaseVirtualizedContainer`1.MeasureOverride(SizeF availableSize)
at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
at Telerik.WinControls.UI.GridVirtualizedRowElement.MeasureElements(SizeF availableSize, SizeF clientSize, Padding borderThickness)
at Telerik.WinControls.UI.LightVisualElement.MeasureOverride(SizeF availableSize)
at Telerik.WinControls.UI.GridRowElement.MeasureOverride(SizeF availableSize)
at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
at Telerik.WinControls.UI.VirtualizedStackContainer`1.MeasureElementCore(RadElement element, SizeF availableSize)
at Telerik.WinControls.UI.ScrollableRowsContainerElement.MeasureElementCore(RadElement element, SizeF availableSize)
at Telerik.WinControls.UI.VirtualizedStackContainer`1.MeasureElement(IVirtualizedElement`1 element)
at Telerik.WinControls.UI.BaseVirtualizedContainer`1.MeasureElements()
at Telerik.WinControls.UI.BaseVirtualizedContainer`1.MeasureOverride(SizeF availableSize)
at Telerik.WinControls.UI.ScrollableRowsContainerElement.MeasureOverride(SizeF availableSize)
at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
at Telerik.WinControls.UI.RowsContainerElement.MeasureOverride(SizeF availableSize)
at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
at Telerik.WinControls.UI.ScrollViewElement`1.MeasureViewElement(SizeF availableSize)
at Telerik.WinControls.UI.ScrollViewElement`1.MeasureView(SizeF availableSize)
at Telerik.WinControls.UI.ScrollViewElement`1.MeasureOverride(SizeF availableSize)
at Telerik.WinControls.UI.GridTableElement.MeasureOverride(SizeF availableSize)
at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
at Telerik.WinControls.Layouts.DockLayoutPanel.MeasureOverride(SizeF constraint)
at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayout()
at Telerik.WinControls.RadElement.UpdateLayout()
at Telerik.WinControls.UI.GridVisibilityHelper.EnsureRowVisible(GridViewRowInfo rowInfo)
at Telerik.WinControls.UI.GridTableElement.EnsureRowVisible(GridViewRowInfo rowInfo)
at Telerik.WinControls.UI.GridTableElement.EnsureCellVisible(GridViewRowInfo rowInfo, GridViewColumn column)
at Telerik.WinControls.UI.GridTableElement.UpdateViewCore(Object sender, DataViewChangedEventArgs args)
at Telerik.WinControls.UI.GridTableElement.UpdateView(Object sender, DataViewChangedEventArgs args)
at Telerik.WinControls.UI.GridTableElement.ProcessTemplateEvent(GridViewEvent eventData)
at Telerik.WinControls.UI.GridTableElement.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)
at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(GridViewEvent gridEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.RaiseCurrentChanged(GridViewTemplate template, GridViewRowInfo row, GridViewColumn column, Boolean user)
at Telerik.WinControls.UI.GridViewTemplate.CollectionView_CurrentChanged(Object sender, EventArgs e)
at System.EventHandler.Invoke(Object sender, EventArgs e)
at Telerik.WinControls.Data.RadCollectionView`1.OnCurrentChanged(EventArgs args)
at Telerik.WinControls.Data.RadCollectionView`1.SetCurrentPositionCore(Int32 newPosition, Boolean forceNotify, CurrentChangeReason reason)
at Telerik.WinControls.Data.RadListSource`1.InitializeCurrentItem()
at Telerik.WinControls.Data.RadListSource`1.Initialize()
at Telerik.WinControls.Data.RadListSource`1.Bind(Object dataSource, String dataMember)
at Telerik.WinControls.Data.RadListSource`1.set_DataSource(Object value)
at Telerik.WinControls.UI.GridViewTemplate.set_DataSource(Object value)
at Telerik.WinControls.UI.RadGridView.set_DataSource(Object value)
at AgroCenterCommunity.LawsForm.UpdateData() in C:\Documents and Settings\mxL\My Documents\Visual Studio 2008\Projects\ACK_01\ACK_01\LawsForm.cs:line 245
at AgroCenterCommunity.LawsForm.UpdateButton_Click(Object sender, EventArgs e) in C:\Documents and Settings\mxL\My Documents\Visual Studio 2008\Projects\ACK_01\ACK_01\LawsForm.cs:line 676
at System.Windows.Forms.Control.OnClick(EventArgs e)
at Telerik.WinControls.RadControl.OnClick(EventArgs e)
at Telerik.WinControls.UI.RadButtonBase.buttonElement_Click(Object sender, EventArgs e)
at Telerik.WinControls.RadItem.OnClick(EventArgs e)
at Telerik.WinControls.UI.RadButtonItem.OnClick(EventArgs e)
at Telerik.WinControls.UI.RadButtonElement.OnClick(EventArgs e)
at Telerik.WinControls.RadItem.DoClick(EventArgs e)
at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
at Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args)
at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
at Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args)
at Telerik.WinControls.RadElement.DoMouseUp(MouseEventArgs e)
at Telerik.WinControls.ComponentInputBehavior.OnMouseUp(MouseEventArgs e)
at Telerik.WinControls.RadControl.OnMouseUp(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
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 System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 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 AgroCenterCommunity.Program.SplashScreen() in C:\Documents and Settings\mxL\My Documents\Visual Studio 2008\Projects\ACK_01\ACK_01\Program.cs:line 41
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.NullReferenceException
Message="Object reference not set to an instance of an object."
Source="AgroCenterCommunity"
StackTrace:
at AgroCenterCommunity.LawsForm.CategoryView_ViewCellFormatting(Object sender, CellFormattingEventArgs e) in C:\Documents and Settings\mxL\My Documents\Visual Studio 2008\Projects\ACK_01\ACK_01\LawsForm.cs:line 360
at Telerik.WinControls.UI.CellFormattingEventHandler.Invoke(Object sender, CellFormattingEventArgs e)
at Telerik.WinControls.UI.RadGridViewElement.OnViewCellFormatting(Object sender, CellFormattingEventArgs e)
at Telerik.WinControls.UI.GridDataCellElement.OnViewCellFormatting(CellFormattingEventArgs e)
at Telerik.WinControls.UI.GridCellElement.UpdateInfo()
at Telerik.WinControls.UI.GridVirtualizedCellElement.Initialize(GridViewColumn column, GridRowElement row)
at Telerik.WinControls.UI.GridDataCellElement..ctor(GridViewColumn column, GridRowElement row)
InnerException:

Sorry, wrong forum.

Hi,

I want to know if there is any way to check whether the caret is currently in a table or not in rich text box.

Regards,
Tarak

I want my users to be able to paste multiple paragraphs of text into a cell.  However, when I paste text with more than one paragraph into a cell it is truncated to the first paragraph.