Questions on UI for WPF Forum

1 answer

129 views

Custom appointment property and UI update

Dear Telerik Team!

I use custom appointment which inherits from EntityObject. What I want to achieve is to place a button on an appointment, so I placed following code on the custom appointment template:

<Button Grid.Column="0" Grid.Row="1" Content="{Binding Appointment.Approved}" Width="50" Height="50" prism:Click.CommandParameter="{Binding Appointment.Id}" prism:Click.Command=

"{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=DataContext.TaskApprovalCommand}"

/>

I'm able to click the button and execute its command, but when I change "Approved" property the UI is not updating. When I try to bind the content of the button to some other property, like "Subject" it is working fine. The problem is with custom properties, the ones which are not part of original appointment class. Could you please suggest some solution for that problem? I'd be very grateful.

Many thanks and best regards
Krzysztof Kaźmierczak

ScheduleView

answered on 19 Nov 2012

5 answers

174 views

NullReferenceException when adding a Bollinger Band indicator to the chart

Hi,

I'm using Telerik RadControls Q3 2012. After the update, I plan to add a Bollinger Band to a ChartView. However, after several trials, it always hangs the application by System.NullReferenceException: Object reference not set to an instance of an object.

The ChartView I'm using is a simple LineSeries chart in XAML:

<telerik:RadCartesianChart Margin="5" Grid.Column="0" x:Name="PriceChart" Padding="0,0,0,0">

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:DateTimeContinuousAxis LabelFormat="d-MMM-yy"

MajorStep="1"

MajorStepUnit="Month"

GapLength="0.8"

PlotMode="OnTicks"

/>

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis>

<telerik:LinearAxis BorderBrush="DimGray" BorderThickness="0.5" />

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.Series>

<chartView:LineSeries ItemsSource="{Binding ChartData}"

CategoryBinding="Date"

ValueBinding="Price"

Stroke="Black"

StrokeThickness="0.5"/>

</telerik:RadCartesianChart.Series>

<telerik:RadCartesianChart.Grid>

<telerik:CartesianChartGrid MajorLinesVisibility="Y"/>

</telerik:RadCartesianChart.Grid>

</telerik:RadCartesianChart>

This is how I add the Bollinger Band to the chart:

LineSeries lineSeries = this.PriceChart.Series[0] as LineSeries;

if ((lineSeries != null) && (lineSeries.ItemsSource != null))

{

BollingerBandsIndicator indicator = new BollingerBandsIndicator();

indicator.Period = 5;

indicator.StandardDeviations = 2;

indicator.CategoryBinding = lineSeries.CategoryBinding;

indicator.ValueBinding = lineSeries.ValueBinding;

indicator.ItemsSource = lineSeries.ItemsSource;

indicator.Stroke = Brushes.Red;

indicator.LowerBandStroke = Brushes.Red;

indicator.StrokeThickness = 1;

this.PriceChart.Indicators.Add(indicator);

}

And this is the StackTrace for the Exception caught:

at

Telerik.Windows.Controls.ChartView.BollingerBandsIndicatorDataSource.BindCore()

in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\DataBinding\DataSources\Financial\BollingerBandsIndicatorDataSource.cs:line

63 at

Telerik.Windows.Controls.ChartView.ChartSeriesDataSource.Bind() in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\DataBinding\DataSources\ChartSeriesDataSource.cs:line

235 at

Telerik.Windows.Controls.ChartView.ChartSeriesDataSource.Rebind(Boolean

itemsSourceChanged, IEnumerable newSource) in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\DataBinding\DataSources\ChartSeriesDataSource.cs:line

81 at

Telerik.Windows.Controls.ChartView.ChartSeriesDataSource.set_ItemsSource(IEnumerable

value) in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\DataBinding\DataSources\ChartSeriesDataSource.cs:line

54 at

Telerik.Windows.Controls.ChartView.ChartSeries.InitDataBinding() in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\ChartSeries.cs:line

316 at

Telerik.Windows.Controls.ChartView.IndicatorBase.InitDataBinding() in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\CartesianChart\Indicators\IndicatorBase.cs:line

94 at

Telerik.Windows.Controls.ChartView.ValueIndicatorBase.InitDataBinding() in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\CartesianChart\Indicators\ValueIndicatorBase.cs:line

50 at

Telerik.Windows.Controls.ChartView.ChartSeries.OnApplyTemplate() in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\ChartSeries.cs:line

239 at

Telerik.Windows.Controls.ChartView.LineIndicatorBase.OnApplyTemplate() in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\CartesianChart\Indicators\LineIndicatorBase.cs:line

112 at

Telerik.Windows.Controls.ChartView.BollingerBandsIndicator.OnApplyTemplate() in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\CartesianChart\Indicators\BollingerBandsIndicator.cs:line

125 at

System.Windows.FrameworkElement.ApplyTemplate() at

Telerik.Windows.Controls.ChartView.RadChartBase.OnPresenterAdded(ChartElementPresenter

presenter) in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\RadChartBase.cs:line

405 at

Telerik.Windows.Controls.ChartView.PresenterCollection`1.InsertItem(Int32 index,

T item) in

c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\PresenterCollection.cs:line

34 at

STA.Modules.MarketData.Views.PairAnalytics.PairAnalyticsDetailPairView.<PostQueryChartData>b__0()

in C:\Segantii\Development\Source Control\Projects\Odin\trunk\Source

Codes\SegantiiTradingAnalytics\STA.Modules.MarketData\Views\PairAnalytics\PairAnalyticsDetailPairView.xaml.cs:line

70 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.WrappedInvoke(Delegate callback, Object

args, Int32 numArgs, Delegate catchHandler) at

System.Windows.Threading.DispatcherOperation.InvokeImpl() at

System.Threading.ExecutionContext.runTryCode(Object userData) at

System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode

code, CleanupCode backoutCode, Object userData) at

System.Threading.ExecutionContext.Run(ExecutionContext executionContext,

ContextCallback callback, Object state, Boolean ignoreSyncCtx) 

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, Int32 numArgs) at

MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate

method, Object args, Int32 numArgs, Delegate catchHandler) at

System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, 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.Application.RunInternal(Window

window) at System.Windows.Application.Run() at

SegantiiTradingAnalytics.App.Main() in C:\Segantii\Development\Source

Control\Projects\Odin\trunk\Source

Codes\SegantiiTradingAnalytics\SegantiiTradingAnalytics\obj\x86\Debug\App.g.cs:line

0 at System.AppDomain._nExecuteAssembly(RuntimeAssembly

assembly, String[] args) at

System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext

activationContext, String[] activationCustomData) at

Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone() 

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext,

ContextCallback callback, Object state, Boolean ignoreSyncCtx) 

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext,

ContextCallback callback, Object state) at

System.Threading.ThreadHelper.ThreadStart()

Any help will be welcome.
Many thanks!

Frankie

ChartView

answered on 19 Nov 2012

2 answers

135 views

Adding custom Golbal Functions

Hi!

I've tried to add a custom function to the functions list and haven'd found any way to do it. In Win Forms, this is possible by extending

Telerik.Data.Expressions.ExpressionContext

class. However, in WPF i haven't found any similar class.
Can you help, please?
Alex

ExpressionEditor

answered on 19 Nov 2012

7 answers

966 views

Persisting a custom filter

In my grid I have a custom collection filter that I created using this blog post: http://blogs.telerik.com/xamlteam/posts/11-12-05/filtering-collection-properties-with-radgridview-for-silverlight-and-wpf.aspx .

I'm currently adding persistence to my grid and running into issues saving/restoring my custom filter. It seems that I need to implement IColumnFilterDescriptor to properly reflect UI changes when I set my filter programmatically upon restoring a persisted grid. However (as in the above demo) my custom filter descriptor only implements IFilterDescriptor. Could you provide some information on how I can implement my own filter descriptor and also be able to persist it?

Thanks.

GridView

answered on 19 Nov 2012

0 answers

68 views

Add Contains as a Default FilterOperator for search in a string field

Hi,
As you know when we add a FilterDescriptors to a RadDataFilter it select IsEqualTo as default item for search.
i want to always show Contains as a default when select a string variable.
How i can do it?

Best Regards.

DataFilter

asked on 17 Nov 2012

1 answer

161 views

Error happend when using RadGridView and Scrollviewer.

Hello,
Please help me with this error. In my application, i put a RadGridView inside a Scrollviewer as showed the code block below. When i run this application each column becomes so wide, their widths are 10000px, equal to their MaxWidth althrougth i do not set any columns' MaxWidth:

<Window x:Class="GridViewTest.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

Title="MainWindow" Height="350" Width="525">

<ScrollViewer telerik:StyleManager.Theme="Metro" HorizontalScrollBarVisibility="Auto">

<telerik:RadGridView AutoGenerateColumns="False" ShowGroupPanel="False" ShowInsertRow="False" IsReadOnly="True" RowIndicatorVisibility="Collapsed" Name="grdItems">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Header1" Width="50*" MinWidth="50" />

<telerik:GridViewDataColumn Header="Header2" Width="25*" MinWidth="50" TextAlignment="Right" />

<telerik:GridViewDataColumn Header="Header3" Width="25*" MinWidth="50" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</ScrollViewer>

</Window>

What i really want is that the horizontal scrollbar apprears when the main window is not maximize and disappears when the main window is maximize.

GridView

answered on 17 Nov 2012

1 answer

234 views

Document ruler and RadDocument distance

How can i determined?
For example: When i change layout mode flow to paged the distance changing the document ruler and the raddocument.
I would like copy drag from listbox to document some text.Quote of the mouse position, and set the caret position, when drop completed.
When layout mode flow, allright, but paged mode not good.

RichTextBox

answered on 16 Nov 2012

1 answer

142 views

Multiple maximized tiles

I'm trying to figure out some way to obtain a layout similar to the following:

| item0 |
| item1 |
| item2 |
| i3 || i4 || i5 || i6 || i7 |

That is, multiple tiles that are maximized along the top 3 rows, but the bottom row contains minimized version of the rest of the items. The idea is also to have this work such that the number of row available corresponds to the available height of the control.

Is there anyway to accomplish this with the RadTileView?

TileView

answered on 16 Nov 2012

1 answer

239 views

Making the RadDocking status to Tabbed document?

Is there a way to make the default RadDocking status to Tabbed document?
When we right click the docking pane, there are "Floating, Dockable, Tabbed Document, Auto hide, Hide" options. But I don't knew which property does this change? How to make it to "Tabbed Document" by default?

Thanks.

Docking

answered on 16 Nov 2012

5 answers

90 views

Setting document causes an error

I am grabbing an RTF document via a web service. That result is a string (the sRTF variable). Code to import this into the editor is as follows:

// Convert to a byte array with the proper encoding

byte[] byteArray = Encoding.ASCII.GetBytes(sRTF);

// Then import into the document

IDocumentFormatProvider formatProvider = DocumentFormatProvidersManager.GetProviderByExtension(".rtf");

editor.Document = formatProvider.Import(byteArray);

Although this works, and I see my document show up correctly, about a half second later the application blows up with the attached error. I included this as an image to show call stack and other info. Any ideas anyone?

RichTextBox

answered on 16 Nov 2012