Questions on UI for WPF Forum

11 answers

409 views

Hello,

In the documentation it shows setting the VirtualizatonMode of the TreeViewPanel with an attached property:

<telerik:RadTreeView x:Name="radTreeView" telerikTreeView:TreeViewPanel.IsVirtualizing="True" telerikTreeView:TreeViewPanel.VirtualizationMode="Hierarchical">

However VS is giving me the error that the attached property is read only.

Has this method changed, or am I maybe doing something else incorrectly?

Thanks,

Andrew

TreeView

answered on 11 Dec 2019

3 answers

140 views

System.OutOfMemoryException error then Save

Hi,

I have install the trial release 2015.1 401 for testing.

I have create a spreadsheet with 130 sheet, but then save the Book1.xlsx from File->Save option i retrive an ok message with this error: System.OutOfMemoryException and the file it's not saved

With 20 sheets it's work OK.

My question is: Is there a limit of sheets?

Thanks

Aurelio

Spreadsheet

answered on 11 Dec 2019

3 answers

230 views

RadDropDownButton with custom DropShadowEffect for DropDownContent

Greetings,

we're using the RadDropDownButton in order to create menus. Our DropDownContent contains a menu with custom layout. However, customizing the drop down content itself doesn't seem possible.

DropDownContent has:

* A fixed background color (Light gray) and cannot be set to transparent

* A fixed DropDownShadow that is cut off when we try to shift position by using PopupPlacementTarget.

We would like to modify the DropDownShadow effect a bit to match the UI and add a shape, having an arrow pointing upward, outside the bounds of the DropDownContent.

If the background and DropDownShadow were removeable, we could just implement these features within the content itself. Is there a way to achieve this, currently?

Buttons

answered on 10 Dec 2019

2 answers

116 views

Adding Control.DataVisualization to App.xaml uses enormous amounts of RAM on View creation

I have a problem trying to use another Telerik component (-> RadTimeBar) which leads to a not loading application with a lot of memory consumption. I am using NoXaml assemblies so I figured I have to add DataVisualization to the App.xaml ResourceDictionary in order to see the control (because it is "invisible" so far). As soon as I add Control.DataVisualization to the App.xaml ResourceDictionary the application is no longer starting properly. It tries to initialize the first visible "start page" called TuggersView.xaml which uses a Telerik RadGridView. However the View initialization call never returns and meanwhile the application uses above 4GB of RAM before I kill the process. Running in debug the application usually consumes around 400 to 500 MB when loaded completely.

Have you ever encountered this kind of behaviour?

App.xaml Ok:

App.xaml issue:

GridView

answered on 10 Dec 2019

3 answers

463 views

Wpf.NetCore NuGet Package references SharpDX

Hi, I just downloaded the latest UI for WPF (2019.3.1023) NuGet packages. Obviously the Wpf.NetCore packages have dependencies to SharpDX (>= 2.5.0) and SharpDX.Direct3D9 (>= 2.5.0). These are packages compiled for .NET Framework and NOT compatible with .NET Core 3.x

Hey guys, do you test your packages before deployment? Can I use the controls in my project anyway, should I remove the SharpDX references?

Regards
Heiko

General Discussions

answered on 09 Dec 2019

3 answers

252 views

RadCartesianChart LineSeries mixed linetype

Hi,

What is the best practice to have a combination of a full line to a dotted line.

I would like to use it in data of last x weeks to a forecast of y weeks. I would like to have a dotted line for the forecast and a full line for the last weeks.

Thanks in advance!

ChartView

answered on 06 Dec 2019

1 answer

286 views

ContextMenu with RadComboBox Binding problems

Hey together,

I have a MapControl in my application in which I have different MapLayers with different MapItemsControls.
To a few of them I want to add ContextMenues if someone rightclicks. For example to create a route from Pushpin A to B, to add it to some existing things etc.
To make the second option easy, I want to add a RadCombobox to the ContextMenue and populate it with the data of an ObservableCollection that is part of the DataContext of the RadWindow.

The problem is, that the RadComboBox stays empty. If I add the RadComboBox directly without the ContextMenu it gets populated as it should.
Also if I put the ContextMenu directly into the MapLayer it populates, but I need the Source of the Pushpin as a Commandparameter later so I can trigger some things with the underlying element.

<map:MapLayer

x:Name="MapLayerAufträge"

>

<map:MapItemsControl

ItemsSource="{Binding AufträgeLocations}"

>

<map:MapItemsControl.ItemTemplate>

<DataTemplate>

<map:Pushpin

Location="{Binding Location}"

Visibility="{Binding Path=IsVisible, Converter={StaticResource VisibleIfTrueConverter}}"

ToolTip="{Binding Name}"

MouseLeftButtonDown="MontageAufträgePushpin_MouseDown"

>

<map:Pushpin.Background>

<SolidColorBrush

Color="{Binding MontageEinteilung, Converter={StaticResource AuftragMontageEingeteiltPinFarbeConverter}}"

Opacity="0.8"

/>

</map:Pushpin.Background>

<telerik:RadContextMenu.ContextMenu>

<telerik:RadContextMenu

x:Name="rcmKarte"

>

<telerik:RadMenuItem Header="Tour starten"/>

<telerik:RadMenuItem

Header="Zu Tour hinzufügen"

>

<telerik:RadComboBox

ItemsSource=

"{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type telerik:RadWindow}}, Path=DataContext.Touren, Mode=OneWay}"

SelectedValuePath="ID"

>

<telerik:RadComboBox.ItemTemplate>

<DataTemplate>

<Grid

Margin="0 3"

>

<StackPanel

Orientation="Horizontal"

>

<TextBlock Text="{Binding Monteure}"/>

<TextBlock Text=" KW: " />

<TextBlock Text="{Binding KWsString}"/>

<TextBlock Text=" (" />

<TextBlock Text="{Binding DatumStart, StringFormat=d}" />

<TextBlock Text="-" />

<TextBlock Text="{Binding DatumEnde, StringFormat=d}" />

<TextBlock Text=")" />

</StackPanel>

</Grid>

</DataTemplate>

</telerik:RadComboBox.ItemTemplate>

</telerik:RadComboBox>

<Button

Content="Bestätigen"

Command="{Binding PutInTourCommand}"

/>

</telerik:RadMenuItem>

</telerik:RadContextMenu>

</telerik:RadContextMenu.ContextMenu>

</map:Pushpin>

</DataTemplate>

</map:MapItemsControl.ItemTemplate>

</map:MapItemsControl>

<map:MapItemsControl

ItemsSource="{Binding SelectedAufträgeLocations}"

>

<map:MapItemsControl.ItemTemplate>

<DataTemplate>

<map:Pushpin

Location="{Binding LagerLocation.Location}"

ToolTip="{Binding Name}"

Template="{StaticResource LagerPushpinTemplate}"

PositionOrigin="0.45, 0.45"

>

<map:Pushpin.Background>

<SolidColorBrush

Color="#EF6C00"

/>

</map:Pushpin.Background>

</map:Pushpin>

</DataTemplate>

</map:MapItemsControl.ItemTemplate>

</map:MapItemsControl>

<map:MapItemsControl

ItemsSource="{Binding SelectedAufträgeLocations}"

>

<map:MapItemsControl.ItemTemplate>

<DataTemplate>

<map:Pushpin

Location="{Binding Location}"

ToolTip="{Binding Name}"

>

<map:Pushpin.Background>

<SolidColorBrush

Color="#EF6C00"

Opacity="0.8"

/>

</map:Pushpin.Background>

</map:Pushpin>

</DataTemplate>

</map:MapItemsControl.ItemTemplate>

</map:MapItemsControl>

</map:MapLayer>

Has anyone an idea how I can achieve this?

Greetings,

Benedikt

ContextMenu

answered on 06 Dec 2019

1 answer

429 views

Problem with large amounts of live data

I have a rad Cartesian chart that updates live as data comes in, I have the render options set to Direct2D and seperate. I have tried bitmap/batch also and it seems to not make a difference.

The problem is When the collection of data starts to reach around 20,000 datapoints the UI will completely freeze up although the code is still executing.

I have a requirement to update live data up to 300,000 data points at a rate of 50HZ. Is this possible with your tools?

Chart

answered on 06 Dec 2019

1 answer

118 views

WPF RadGrid copy multiple cell non continuous

WPF RadGrid copy multiple cell (non continuous ones like first and third). The second one is copied as empty. How to avoid this? Is there a property for setting this? The CellClipboardContent event is only fired twice though.

General Discussions

answered on 05 Dec 2019

1 answer

171 views

RadCombobox inside the telerik gridview not displaying the SelectedValue

Hi,
I've a RadComboBox inside the RadGridView. When loading the tab very first time data inside the combobox is not displaying.

We have data in selectedvalue and in itemsource collection, but it is not displaying. Combobox is in editable mode.
<telerik:RadComboBox x:Name="ComboBox" Tag="{Binding SeqNo,UpdateSourceTrigger=PropertyChanged}" Style="{StaticResource TextSearchStyle}"
ItemsSource="{Binding DataContext.List, Mode=TwoWay, RelativeSource={RelativeSource AncestorType={x:Type UserControl}, Mode=FindAncestor}}"
SelectedValue="{Binding Code, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" SelectedValuePath="Code" IsEditable="True" ItemTemplate="{StaticResource ComboBoxItem}" ItemContainerStyle="{StaticResource ComboBoxItemStyle}"
CanKeyboardNavigationSelectItems="True" TextSearchMode="Contains" IsFilteringEnabled="True" OpenDropDownOnFocus="False" GotFocus="ComboBox_GotFocus" LostFocus="ComboBox_LostFocus" DropDownClosed="ComboBox_DropDownClosed" GotKeyboardFocus="ComboBox_GotKeyboardFocus"
IsTextSearchEnabled="True" KeyDown="ComboBox_KeyDown" PreviewKeyDown="ComboBox_KeyUp" CanAutocompleteSelectItems="False" TabIndex="7" >
<telerik:RadComboBox.ToolTip>
<StackPanel Height="Auto" Width="Auto" MaxWidth="300" Background="#F2F2F2">
<TextBlock Text="{Binding ShortDescription}" Style="{StaticResource ToolTipCodesDescriptionTextBlock}"/>
</StackPanel>
</telerik:RadComboBox.ToolTip>
<i:Interaction.Triggers>
<i:EventTrigger EventName="GotFocus">
<i:InvokeCommandAction Command="{Binding DataContext.LoadPopUpCommand, RelativeSource={RelativeSource AncestorType={x:Type UserControl}, Mode=FindAncestor}}" CommandParameter="{Binding DataContext, ElementName=ComboBox}" />
</i:EventTrigger>
<i:EventTrigger EventName="DropDownClosed">
<i:InvokeCommandAction Command="{Binding DataContext.CPTSelectionChanged, RelativeSource={RelativeSource AncestorType={x:Type UserControl}, Mode=FindAncestor}}"
CommandParameter="{Binding DataContext, ElementName=CPTComboBox}"/>
</i:EventTrigger>
<i:EventTrigger EventName="LostFocus">
<i:InvokeCommandAction Command="{Binding DataContext.ComboLostFocusCommand, RelativeSource={RelativeSource AncestorType={x:Type UserControl}, Mode=FindAncestor}}" CommandParameter="{Binding DataContext, ElementName=ComboBox}" />
</i:EventTrigger>
</i:Interaction.Triggers>
</telerik:RadComboBox>
Regards,
Mahesh

ComboBox

answered on 05 Dec 2019