Questions on UI for WPF Forum

6 answers

188 views

Some bugs

Hi,

In my application I have a grid where all columns are build dynamically in the code behind.
The user can, with the aid of a combobox, select a different layout for the gridview.

When there are many columns in the grid (and the horizontal scrollbar is visible) then I get the following error when I change the
layout:
System.ArgumentOutOfRangeException was unhandled by user code
Message=Specified argument was out of the range of valid values.
Parameter name: index
Source=Telerik.Windows.Controls.GridView
ParamName=index
StackTrace:
       at Telerik.Windows.Controls.GridView.MultipleCopiesCollection.get_Item(Int32 index) in c:\Builds\WPF_Scrum\GridView_WPF_2009_Q3_SP1\Sources\Development\Controls\GridView\GridView\GridView\ItemsControl\MultipleCopiesCollection.cs:line 289
       at System.Windows.Data.ListCollectionView.InternalItemAt(Int32 index)
       at System.Windows.Data.ListCollectionView.GetItemAt(Int32 index)
       at System.Windows.Controls.ItemCollection.GetItemAt(Int32 index)
       at System.Windows.Controls.ItemCollection.get_Item(Int32 index)
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.VirtualizeChildren(List`1 blockList, IItemContainerGenerator generator) in c:\Builds\WPF_Scrum\GridView_WPF_2009_Q3_SP1\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 1193
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.GenerateAndMeasureChildrenForRealizedColumns(Size constraint) in c:\Builds\WPF_Scrum\GridView_WPF_2009_Q3_SP1\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 189
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureOverride(Size constraint) in c:\Builds\WPF_Scrum\GridView_WPF_2009_Q3_SP1\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 86
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       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, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
InnerException:

In the same scenerio I found an other bug: when I switch between layouts where
in one layout ShowInsertRow = true and in the other false then I get:

System.NullReferenceException was unhandled by user code
Message=Object reference not set to an instance of an object.
Source=Telerik.Windows.Controls.GridView
StackTrace:
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.SetDataGridCellPanelWidth(IList children, Double newWidth) in c:\Builds\WPF_Scrum\GridView_WPF_2009_Q3_SP1\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 1454
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.ArrangeOverride(Size arrangeSize) in c:\Builds\WPF_Scrum\GridView_WPF_2009_Q3_SP1\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 1508
       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, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
InnerException:

GridView

answered on 18 Feb 2010

1 answer

102 views

Cell Select

Hello
I have a datagrid with 30 rows and 30 columns, can I make a selection with the mouse of the column 15 to 20 on lines 8 and 10? And do not select the entire row or column all?

GridView

answered on 18 Feb 2010

2 answers

204 views

RadDocking PreviewClose Event, how do you get the Pane control which is closing?

Hi,

I'm using the RadDocking control and added a handler for PreviewClose to be notified when a RadPane closed. This is firing ok, however I'm not quite sure how to get the RadPane control more importantly the Name of the control which is being destroyed, I need this to clean up my data storage behind the scenes.

Please can some one provide me with an example or point me in the right direction?

Kind regards
Neil

Docking

answered on 18 Feb 2010

1 answer

112 views

GridViewGroupPanel

Hello
How can i hide GridViewGroupPanel?

GridView

answered on 18 Feb 2010

1 answer

156 views

TimePicker scrollbar

The list is too long when I set the time interval to 10 or 15 minutes. and set the columns to 3.

Is it possible to have a scrollbar for the dropdown list of timepicker like the datetimepicker in the radscheduler?

Thanks.

TimePicker

answered on 18 Feb 2010

1 answer

265 views

telerik.windows.examples assembly not found

Downloaded and installed the Radcontrols for WPF and I want to run the examples locally (so I can disect the code <hehe>) but I'm having a problem with not finding the telerik.windows.examples assembly.

I've gone through all the telerik assemblies and I simply can't find one that remotely seems to be the telerik.windows.examples one.

Thanks

General Discussions

answered on 18 Feb 2010

6 answers

442 views

Resizing between two RadDocking Controls and Real Closing of Panes

hi guys,

i've been trying out the RadDock control via "RadControls_for_WPF_2009_3_1314_TRIAL.msi" for the past two and something weeks for my company, we're looking to buy docking capabilities to our WPF .Net 3.5 app.

it's looks great, feels great, and easy to program with - NICE work you guys.

some things that i need some help with trying the control:

my basic WPF app - in XAML: i've put a dock panel in a window inside a grid. added an expander (RadExpander of course) docked to the right side. added two RadDock controls one of them docked to the Top and one to the Bottom.

1. i had to set the DockPanel.Dock attached property on both RadDock controls -

when i set only one to dock to the Top and nothing on the other one - the RadDock didn't show... although it should make the second RadDock fill the available space in the panel, no?

2. i want to be able to resize each of the RadDock controls, 'cause now i can't really control their size as a user on run time. i thought about putting them into a grid with splitter between them, but is that the best way?

3. in that same example - when i drag a pane from the top-docked RadDock control - moving it downwards makes it "hide" behind the bottom-docked RadDock control (that's normal i guess?) but dragging it to the right i can move it, still floated, on top of the RadExpander, it's looks odd 'cause it's hiding behind the bottom-docked RadDock control but on top of the RadExpander,

any ideas of making it look better?

4. the Close button on a pane makes it Hidden (that's great!) but in our app we have the need sometimes to create a lot of floated panes that the user can close and open new ones, i wanna know if there is a way to "really" close the pane i.e. get ride of it, dispose it - whatever, my fear is from large memory usage because some of these panes store lots of data and controls in them,

i'm working on trying big quantities of data and control in panes to see what happens - thought about asking first how to deal with it.

hope i was able to explain myself clearly,

thank you so much in advance.

Lior.

Docking

answered on 18 Feb 2010

3 answers

208 views

SortDescriptor error in Expression Blend 3

I have a RadGridView bound to a generic ObservableCollection of a class I use in my application.
The class has a public property called ID (int)

I created a sort descriptor to make sure the data is sorted using the ID field
Code:
<Telerik:RadGridView.SortDescriptors>
<Telerik_Windows_Data:SortDescriptor Member="ID" SortDirection="Descending"/>
</Telerik:RadGridView.SortDescriptors>

While working at run-time the code generates an Expression Blend 3 error:
"Invalid property or field - 'ID' for type Object"

I'd appreciate any input on why.

GridView

answered on 18 Feb 2010

1 answer

104 views

Autofill in Grid

Hi,

I have a grid and am using MVVM Pattern. Now i would like to change a column value in any row and do a short cut to save (like Ctrl+S), then that column value should be updated for all other rows of that column.
Is there any way to achieve this requirement.

Any help is much appreciated.

Regards

Sujith

GridView

answered on 18 Feb 2010

3 answers

314 views

Optimizing RadGridView

I'm looking for any guidelines for optimization of the RadGridView. Specifically, I'd like to know if such documentation exists which specifies grid options which might be "performance-heavy". Even though you can load millions of rows into the grid, you still see [the familiar WPF] large spikes in CPU. I'm interested in turning off all non-essential functions to get more performance out of the grid, and am looking for features or settings which ppl. feel helped the overall performance. So far I turned off sorting, highlighting/selection, etc. Each helps / just looking for a general set of principles to really optimize perf.

GridView

answered on 18 Feb 2010