Questions on UI for WPF Forum

3 answers

122 views

NullReferenceException After Update 2015.1.225.45

Hi,

After updating the version mentioned on the title, the project started to throw the following exception:

System.NullReferenceException was unhandled
_HResult=-2147467261
_message=Object reference not set to an instance of an object.
HResult=-2147467261
IsTransient=false
Message=Object reference not set to an instance of an object.
Source=Telerik.Windows.Controls.Navigation
StackTrace:
at Telerik.Windows.Automation.Peers.RadRadialMenuItemAutomationPeer.GetChildrenCore()
at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()
at System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit)
at System.Windows.Automation.Peers.AutomationPeer.UpdateChildren()
at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
at System.Windows.ContextLayoutManager.fireAutomationEvents()
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.UIElement.UpdateLayout()
at System.Windows.Interop.HwndSource.Process_WM_SIZE(UIElement rootUIElement, IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam)
at System.Windows.Interop.HwndSource.LayoutFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
InnerException:

RadialMenu

answered on 19 Mar 2015

1 answer

93 views

Add buttons to RadDiagramNavigationPane

Hi,

I have looked into this, and it seems that the RadDiagramNavigationPane can not accept additional buttons? I would like to add a Print button to it, allowing me to print the actual canvas...is this possible?

/HH

Diagram

answered on 19 Mar 2015

5 answers

100 views

Open Filter Dialog in RadGridViwe via Shortcut

Hi guys,

Well, my questions is short as subject: is there possibility to open filter dialog by pressing for instance ALT+C, instead of clicking the filter icon via mouse.

thanks,
Julian

GridView

answered on 19 Mar 2015

5 answers

394 views

Recursive Call To Automation Peer Error

Hi,
I have some strange behavior. I can not reproduce the error, all I can say is that the error only occurs on my Samsung Tablet Windows 8.1 2 GB of RAM (Touch).

Binary Version: 2014.3.1202.45

Exception Type: System.InvalidOperationException
Message: Recursive call to Automation Peer API is not valid
Stack trace:
System.Windows.Automation.Peers.AutomationPeer.GetChildren()
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.ValidateConnected(AutomationPeer connectedPeer)
at MS.Internal.Automation.ElementProxy.StaticWrap(AutomationPeer peer, AutomationPeer referencePeer)
at System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit)
at System.Windows.Automation.Peers.AutomationPeer.UpdateChildren()
at Telerik.Windows.Automation.Peers.RibbonViewAutomationPeer.GetChildrenCore()
at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()
at System.Windows.Automation.Peers.AutomationPeer.GetChildren()
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.ValidateConnected(AutomationPeer connectedPeer)
at System.Windows.Automation.Peers.AutomationPeer.AutomationPeerFromInputElement(IInputElement focusedElement)
at System.Windows.Automation.Peers.AutomationPeer.RaiseFocusChangedEventHelper(IInputElement newFocus)
at System.Windows.Input.KeyboardDevice.ChangeFocus(DependencyObject focus, Int32 timestamp)
at System.Windows.Input.KeyboardDevice.TryChangeFocus(DependencyObject newFocus, IKeyboardInputProvider keyboardInputProvider, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)
at System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)
at System.Windows.Input.KeyboardDevice.Focus(IInputElement element)
at System.Windows.UIElement.Focus()
at System.Windows.Documents.TextEditorMouse.MoveFocusToUiScope(TextEditor This)
at System.Windows.Documents.TextEditorMouse.OnMouseDown(Object sender, MouseButtonEventArgs e)
at System.Windows.Controls.Primitives.TextBoxBase.OnMouseDown(MouseButtonEventArgs e)
at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
at System.Windows.Input.InputManager.ProcessStagingArea()
at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

Can you please help me with that error.

Regards Markus

RibbonView and RibbonWindow

answered on 19 Mar 2015

6 answers

1.1K+ views

Formatting RadDateTimePicker

I am very confused about RadDateTimePickers formatting behavior. When we set DateSelectionMode to Year, why does it still create a complete date with the selected year but also with day/month from todays date?! This makes absolutely no sense to me. It should display the year only cause that's what my users select - a year, not a full date.

Searching the forums I found several posts showing that we can set a new Culture to define custom ShortDatePattern and LongDatePattern. I did this and changed both formats to "yyyy". Now the control is displaying the year only (yeeha!) but it seems this format is not correct date Format for RadDateTimePickers parser. Checking the ParseDateTime event I can see that e.IsParsingSuccessful is always false now.

So here's the question: How to select a year (yyyy) or month & year (mm/yyyy), display exactly what I've selected in the control's input box AND parse this value as a correct date in code behind?

DateTimePicker

answered on 19 Mar 2015

7 answers

252 views

Filter controls outside of GridView

Hi team,
I've read quite a lot of documentation of GridView, however could not find a tutorial showing how to create a custom filter control outside of GridView, for example, a select control corresponding some specific column. And the select control is under the GridView. It's not part of the GridView. It's an independent control.
How to do that?

Thanks,
-Jingfei

GridView

answered on 19 Mar 2015

4 answers

100 views

Selecting items

Hello,

When using SelectionMode = Multiple, Is it possible to toggle the selected state of the item by clicking it?

Thanks in advance,

Alberto

TimeLine

answered on 18 Mar 2015

2 answers

124 views

ContextSwitchDeadlock Exception in MVVM

Hi,
I have a problem again :))) . Diagram has 1360 items and 1481 connections. When I connection type is polyline and RouteConnection property is true, throw ContextSwitchDeadlock Exception. If I make RouteConnection property false, then it doesn't throw exception, and working without any problem. How can I solve it?

Thanks in advance.

Exception Message:
"The CLR has been unable to transition from COM context 0x20e480 to COM
context 0x20e5f0 for 60 seconds. The thread that owns the destination
context/apartment is most likely either doing a non pumping wait or
processing a very long running operation without pumping Windows
messages. This situation generally has a negative performance impact and
may even lead to the application becoming non responsive or memory
usage accumulating continually over time. To avoid this problem, all
single threaded apartment (STA) threads should use pumping wait
primitives (such as CoWaitForMultipleHandles) and routinely pump
messages during long running operations."

Diagram

answered on 18 Mar 2015

1 answer

132 views

Using scrollview in TableShape

Hi All

I try to build sqlDiagram, I have TableShape sample code. How can I use scrollview in TableShape? I want to scroll TableShape rows.

Diagram

answered on 18 Mar 2015

1 answer

193 views

How to Persist or Serialize Connection Properties

When I create my shapes, I'm changing the style of the Connections to look like the first image where they say "True" and "False". The function CreateTrueConnection shows the properties I'm setting. When I save and then reload the diagram it looks like the 2nd picture, which only retains the green and red colors, but none of the other styling and more importantly NOT the Name property, which I use in function GetTrueTargetRow to figure out my workflow in code. How do I serialize that information into the diagram so it will reload the same way?



public

static void CreateTrueConnection(RadDiagram Diagram, RadDiagramShape Shape, String Label = "")

{

RadDiagramConnection tc = new RadDiagramConnection();

tc.Stroke = Brushes.Green;

tc.StrokeThickness = 2;

tc.AllowDelete = true;

((Telerik.Windows.Diagrams.Core.IDiagramItem)tc).Name = "TrueConnection";

tc.SourceConnectorPosition = Telerik.Windows.Diagrams.Core.ConnectorPosition.Bottom;

tc.ConnectionType = Telerik.Windows.Diagrams.Core.ConnectionType.Polyline;

tc.StartPoint = new Point(Shape.Connectors["Bottom"].AbsolutePosition.X, Shape.Connectors["Bottom"].AbsolutePosition.Y);

tc.EndPoint = new Point(Shape.Connectors["Bottom"].AbsolutePosition.X, Shape.Connectors["Bottom"].AbsolutePosition.Y + 100);

tc.TargetCapType = Telerik.Windows.Diagrams.Core.CapType.Arrow2Filled;

tc.Source = Shape;

// Add the "True" Label

if (Label != "")

{

System.Windows.Controls.Border brdr = new System.Windows.Controls.Border();

System.Windows.Controls.Label lbl = new System.Windows.Controls.Label();

lbl.Background = Brushes.Green;

lbl.Foreground = Brushes.White;

lbl.FontWeight = FontWeights.Bold;

lbl.HorizontalContentAlignment = HorizontalAlignment.Center;

lbl.Content = Label;

brdr.BorderBrush = Brushes.DarkGreen;

brdr.BorderThickness = new Thickness(2.0);

brdr.CornerRadius = new CornerRadius(3.0);

brdr.Child = lbl;

tc.Content = brdr;

}

Diagram.AddConnection(tc);

}




public static dsdSteps.BIEFlowchartStepRow GetTrueTargetRow(dsdSteps StepData, IShape Shape)
{
    dsdSteps.BIEFlowchartStepRow trueTargetRow = null;
    foreach (var con in Shape.OutgoingLinks)
    {                        
        //|| ((RadDiagramConnection)con).Stroke == Brushes.Green  <-- Tried looking at the connection color to know if it's true etc... didn't work
        if ((con.Name == "TrueConnection" || con.Name == "StartConnection") && con.Target != null)
        {
            trueTargetRow = (from x in StepData.BIEFlowchartStep
                             where x.GUID == ((RadDiagramShape)con.Target).Id
                             select x).FirstOrDefault();
        }
    }
    return trueTargetRow;
}

Diagram

answered on 18 Mar 2015