Good evening,

I keep experiencing a null reference exception when pressing Mouse Left Button Down. The event appears to be random (there must be a reason for it) but I am unable to determine if it is something I have caused or if it is the control itself.

I'm a bit of a newbie and I don't fully understand what details of the error message.
Below I have pasted the exception message generated in VS2010. Does this mean anything to anyone?

Thank you very much for your time,

Rob


Message

System.NullReferenceException was unhandled
  Message=Object reference not set to an instance of an object.
  Source=Telerik.Windows.Controls
  StackTrace:
       at Telerik.Windows.Controls.Primitives.ListItem.OnMouseLeftButtonUp(MouseButtonEventArgs e) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Core\Controls\ListControl\ListItem.cs:line 91
       at System.Windows.UIElement.OnMouseLeftButtonUpThunk(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.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
       at System.Windows.UIElement.OnMouseUpThunk(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)
       at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
       at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
       at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
       at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
       at System.Windows.Application.RunDispatcher(Object ignore)
       at System.Windows.Application.RunInternal(Window window)
       at System.Windows.Application.Run(Window window)
       at System.Windows.Application.Run()
       at TAS2.App.Main() in C:\TAS2\TAS2\obj\x86\Debug\App.g.cs:line 0
  InnerException:

I know in 2012 Q3 there is an example of ColorPicker and ColorEditor integration, however, it involves the requirement of a custom window plus a custom viewmodel. This is really not developer-friendly or MVVM-friendly.

I would like to see it integrated by default so that I can just declare something like the following instead of having to create a CustomColorViewModel for every color that I want to edit:
<telerik:RadColorPicker SelectedColor="{Binding FillColor, Mode=TwoWay}" EnableColorEditor="True" />

WPF toolkits from some other companies already has this feature, and IMO this should be a very basic feature of the ColorPicker control. Please add it into the next release.

I don't need the border-less cells but I need to really merge two footer cells. Is it possible to merge footer cells of two consecutive columns?

I need to enter some text in the footer cell but width of the column is too short to display that text. This is why I need to merge the footer cells.

Any suggestions?

I have a TreeView in my UserControl and when I tab into it from the previous control, the focusvisual shows on the TreeView as a whole, and I can't seem to get access to the TreeViewItems.  How can I make the first (or selected) TreeViewItem be the one that has the focus so I can navigate the Tree?

Thanks in advance,
Steve

Hi Telerik,

I have a RadGridView with a DataTable dt as ItemsSource. Since dt is dynamic, I cannot define the columns in XAML. As a result, I set AutoGenerateColumn to true.

One trouble I have, however, is that a few of these columns are foreign keys and I would like to set those columns to be GridViewComboBoxColumns instead of the standard GridViewBoundColumn for strings. Unfortunately, it appears that GridViewComboBoxColumns (along with others like GridViewHyperLinkColumns, etc) are never actually autogenerated regardless of data type.

Is there any way I can hijack the column generation process to ensure a GridViewComboBoxColumn is generated when needed? All I really need is a combo box that lets me choose the value for cells in particular columns.

Thanks.

I'm testing out the pivot grid control and adapted the sample to use adomd.

The problem is when I run it, I get no fields in the picker. Everything is empty. No errors, no extended errors in VS when debugging.

I can verify my connection string is working because I can create an AdomdConnection using Microsoft's API and successfully connect to the SSAS server and see the connection metadata/properties while it's open when debugging with VS.

SASS is 10.50.1600.1,
Microsoft.AnalysisServices.AdomdClinet is v 10.0
WPF 4.0

Not sure why I'm not getting anything using the telerik control.

Hi,

I am trying to build a rad grid view dynamically and I have a slight issue with the column groups.

When the table is shown not all of the groups are shown but when I scroll they appear (only the first 10 get drawn when the grid is first loaded).

I have tried tow different approaches to make this work;

1. Extending RadGridView and building the table based on a dependency property that contains the details of what columns/groups need to be added and,
2. Moving the dependency property up a level and working with an out of the box RadGridView.

Hi,

is there any easy way to set DropVisual using DragDropManager?

I mean something similar to

DragInitializeEventArgs.DragVisual

 

 

 

 

I just updated to the newest version and went through the release note. The change "Column aligned aggregates" in GridView caught my interest, but I seem to be unable to find anything usefull when I search for that term anywhere (also in the documentation).

There were no link in the release note to take me to a detailed description of this change.

How and where do I find the documentation of this?

Thanks

Hey there, I'm creating a project where I want to display attributes of specific objects in a chart. For example, I have 2 different loan objects (Current Loan and Proposed Loan) and I want to display each one of those object's "Tax Savings" in a bar chart. I am trying to do something EXACTLY like this:

http://www.telerik.com/help/wpf/radchartingkit-series-barseries.html 

But I want the properties themselves to be properties on my objects. I've tried basic bindings and I can't seem to get it to work. The objects bind find throughout my app it's just not functioning here. The code I've got is:

                            <telerikChart:RadCartesianChart Width="500" >

                                <telerikChart:RadCartesianChart.HorizontalAxis>
                                    <chartView:CategoricalAxis/>
                                </telerikChart:RadCartesianChart.HorizontalAxis>
                                
                                <telerikChart:RadCartesianChart.VerticalAxis>
                                    <chartView:LinearAxis/>
                                </telerikChart:RadCartesianChart.VerticalAxis>

                                <telerik:BarSeries>
                                    <telerik:BarSeries.DataPoints>
                                        <telerik:CategoricalDataPoint  Value="{Binding Path=CurrentLoan.TaxSavings}"
                                                  Category="Proposed Loan"/>
                                        <telerik:CategoricalDataPoint  Value="{Binding Path=ProposedLoan.TaxSavings}"
                                                  Category="Current Loan"/>
                                    </telerik:BarSeries.DataPoints>
                                </telerik:BarSeries>

                            </telerikChart:RadCartesianChart>

When It loads, it actually blanks out my entire "View" that the charts are supposed to be in. Any suggestions? Thank you