Questions on UI for WPF Forum

4 answers

232 views

Changing the Size of the Points -- and Removing the Colored Area beneath the Line

Hi,

I'm new to Telerik RAD tools, and I have a couple newbie questions:

1) I'm trying to figure out how to decrease the size of the points on a line chart. I'd like them to go away completely, or make them so small the line masks where they are. Is there a way to turn them off?

2) I'd like to know where it is you can change what kind of chart you're working with. Right now, I have a LineArea chart, and I'd like to change it to just a Line chart. For me, the default is line area, and I need the fill area beneath the line to be clear.

3) I'd also like to know how you set the speed of the animation of the line. Right now I have the animation disabled, but it would be nice to have it animate EXTREMELY fast. Right now we have 600 points on a line graph, and I'd like to animate those points (3 major peaks) in about 3 seconds... and then perhaps repeat. (We're simulating a heart beat EKG)

Any advice or help would be much appreciated. Thanks so much!

Greg

Chart

answered on 14 Dec 2009

1 answer

112 views

[Solved] GridViewControl - how to load data to it from simple datatable

GridViewControl - how to load data to it from simple datatable..? There is not such a trick as DataSource, as it was in winforms. DataBinding is the only way to do that?

GridView

answered on 14 Dec 2009

1 answer

129 views

period key not working for numbers

I'm using the numeric up down for several measurement entries, the user is able to use the "." key on the numeric keypad, but not the "." key on the alphabet keyboard (next to the "," key and the shift key).

is there a reason that the period key isn't allowed, and how do I get past it. this is a big problem for my users, as they all use laptops with no "numeric keypad".

Is there a workaround?

Thank you

Joshua

DatePicker

answered on 14 Dec 2009

1 answer

168 views

Entering 0 in datepicker will crash

If the user manually enters "0" in the date textbox and lost focus from date picker , app crashes.

Its seems to crash only with "0"...it does allow the "1" or "2"..or even allows the user to select a NE entry date from the calendar menu but manually delete almost the whole of it.

Error : Year, Month, and Day parameters describe an un-representable DateTime.

'

You can check in Telerik C# sample exe also. It simply crash when you enter '0' in datepicker and lost focus.

Please advice me how to solve or atleast how to stop manual entry in that control asap. We have release soon.

Calendar

answered on 14 Dec 2009

1 answer

96 views

find selected checkbox

Hello

I have a grid with checkBox column
I want to find all the rows
where the user select the checkBox
(something like foreach..
so I can save the ID's of the selected rows in an array)

thanks

GridView

answered on 14 Dec 2009

1 answer

55 views

Record, DataRecord, CurrentRecord and SelectedRecords no longer work in Q3 2009

What are the new classes I can used alternatively? I cast a Record to a DataRecord to access its Data property currently.

SelectedRecords and its CollectionChanged event are gone...

GridView

answered on 14 Dec 2009

6 answers

198 views

Null reference exception on window maximize

I'm getting strange results with the gridview when I maximize my window and the Gridview has data. I can't figure out why it's happening (because sometimes maximizing the window works just fine and sometimes it doesn't). Here's the stack trace:

    
            System.NullReferenceException was unhandled  
        
              Message="Object reference not set to an instance of an object." 
        
              Source="Telerik.Windows.Controls.GridView" 
        
              StackTrace:  
        
                   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.ArrangeChild(UIElement child, Int32 displayIndex, ArrangeState arrangeState) in c:\Builds\WPF_Scrum\GridView_WPF\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 1599  
        
                   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.ArrangeOverride(Size arrangeSize) in c:\Builds\WPF_Scrum\GridView_WPF\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 1536  
        
                   at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)  
        
                   at System.Windows.UIElement.Arrange(Rect finalRect)  
        
                   at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize)  
        
                   at System.Windows.Controls.ItemsPresenter.ArrangeOverride(Size arrangeSize)  
        
                   at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)  
        
                   at System.Windows.UIElement.Arrange(Rect finalRect)  
        
                   at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)  
        
                   at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)  
        
                   at System.Windows.UIElement.Arrange(Rect finalRect)  
        
                   at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds)  
        
                   at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)  
        
                   at System.Windows.UIElement.Arrange(Rect finalRect)  
        
                   at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)  
        
                   at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)  
        
                   at System.Windows.UIElement.Arrange(Rect finalRect)  
        
                   at System.Windows.ContextLayoutManager.UpdateLayout()  
        
                   at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)  
        
                   at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()  
        
                   at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()  
        
                   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)  
        
                   at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)  
        
                   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)  
        
                   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)  
        
                   at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)  
        
                   at System.Windows.Threading.DispatcherOperation.InvokeImpl()  
        
                   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)  
        
                   at System.Threading.ExecutionContext.runTryCode(Object userData)  
        
                   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)  
        
                   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)  
        
                   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)  
        
                   at System.Windows.Threading.DispatcherOperation.Invoke()  
        
                   at System.Windows.Threading.Dispatcher.ProcessQueue()  
        
                   at System.Windows.Threading.Dispatcher.WndProcHook(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, Boolean isSingleParameter)  
        
                   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)  
        
                   at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)  
        
                   at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)  
        
                   at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)  
        
                   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.Threading.Dispatcher.Run()  
        
                   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 Tracker.App.Main() in C:\_projects\R2C\Tracker\Tracker\obj\Debug\App.g.cs:line 0  
        
                   at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)  
        
                   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)  
        
                   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()  
        
                   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:

GridView

answered on 14 Dec 2009

1 answer

219 views

can't set SelectedItem

SelectedItem is null after set

i checked why it happened and appearently there was a problem inside
Telerik.Windows.Data.Dll
in the class
DataControl

on the SelectedItem Property
inside the

ItemCoerce function

the Items.CollectionView is null so it doesn't seceed with the IndexOf
and nothing is selected

now it all happens because the Items.CollectionView is null
i also tried to set the ItemSource & DataContext Before the assigment of selectedItem
but it didn't helped

what should i do to make it work?

thanks

GridView

answered on 12 Dec 2009

5 answers

373 views

Bind to an ObservableCollection of ObservableCollections

Hi Guys

I am trying to bind my chart to a ObservableCollection of ObservableCollections is this possible?

I have worked look at ms-help://telerik.windows.controls/telerik.windows.controls.charting/data-binding-series-mappings.html but no joy. Do you have a sample of this in VB ?

Chart

answered on 11 Dec 2009

0 answers

150 views

ThemeManager.StandardThemeNames

Hi,
I tried to build QuickStart dll, but it gave me error:
'Telerik.Windows.Controls.ThemeManager' does not contain a definition for 'StandardThemeNames'
I found that StandardThemeNames was defined as internal in 'Telerik.Windows.Controls.ThemeManager'
Please help, i need to build and debug to learn the QSF.

Thanks in advance.
Duy Doan

General Discussions

asked on 11 Dec 2009