Questions on UI for WPF Forum

2 answers

105 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

406 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

240 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

256 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

400 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

110 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

158 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

3 answers

808 views

RadCombobox not displaying the SelectedValue after closing and opening the application

Hi,

I have binded custom object collection to the RaCombobox selecting an item and saving is working fine but displaying the item again once we close and open the application is not working.

<telerik:RadComboBox Name="AppContextNames" Width="150" Height="25" SelectedItem="{Binding AppContext,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding Path=DataContext.SharedActionVM.AppContextCollection,RelativeSource={RelativeSource AncestorType={x:Type telerik:RadTreeListView}}}" DisplayMemberPath="Name" />

Here while setting it is working fine but again if go to that combobox even the AppContext object contains value it is showing empty combo value but combocollection is present.

Is there something I have to do from my side??

Regards,

Nagasree.

ComboBox

answered on 05 Dec 2019

3 answers

649 views

Export selection to excel in a MVVM WPF program

I'm currenting working on an existing project where there the creator had UserControl Xamls, the controls are in ViewModel folder where usercontrol.ViewModel.cs has the control and executable.

I'm trying not to break the code, learn how to use MVVM/WPF formatting.

I have added a button to the UserControl.Xaml now I'm not clear on get the button control to work so it can export both selected gridview item or the whole gridview. I have found several forum articles but they do not met my WPF format:

<telerik:RadButton x:Name="btnExport"
                                   Grid.Row="0"
                                   Content="Export to Excel"
                                   Command="{Binding Export2ExcelCommand}"
                                   Width="100"
                                   Margin="4" />

But now I need a good sample that show how I should add the "Export2ExcelCommand" button control to the "ucViewModel.cs" file.

Again the goal is to support both whole gridview export or selected items in gridview to Excel.

Help is appreciated.

GridView

answered on 05 Dec 2019

8 answers

190 views

RadMaskedTextInput - literal shown twice

Hi,

I have this RadMaskedTextInput:

<telerik:RadMaskedTextInput IsClearButtonVisible="True" TextMode="PlainText" Placeholder=" "

Mask="a4/>a3" Margin="2,0,2,0" AcceptsReturn="False" HorizontalAlignment="Stretch" Value="{Binding FilterPasse}" ValueMode="IncludeLiterals" SelectionOnFocus="CaretToBeginning"/>

Following implicit style is used

<Style x:Key="DefaultTelerikMaskedTextInputStyle" TargetType="telerik:RadMaskedTextInput" BasedOn="{StaticResource RadMaskedTextInputStyle}">

<Setter Property="MinHeight" Value="{StaticResource DefaultMinimumHeight}"/>

<Setter Property="FontFamily" Value="{StaticResource DefaultFont}"/>

<Setter Property="FontSize" Value="{StaticResource DefaultFontSize}"/>

<Setter Property="FontWeight" Value="{StaticResource DefaultFontWeight}"/>

<Setter Property="SectionsNavigationMode" Value="None"/>

<!--https://www.telerik.com/forums/how-do-i-make-it-possible-for-a-user-to-tab-immediately-out-of-the-masked-text-input-->

<Setter Property="Validation.ErrorTemplate" Value="{StaticResource ErrorTemplate}"/>

<Style.Triggers>

<Trigger Property="IsEnabled" Value="True">

<Setter Property="Background" Value="{StaticResource DefaultTextBoxBackgroundColor}"/>

</Trigger>

<Trigger Property="IsEnabled" Value="False">

<Setter Property="Background" Value="{StaticResource DefaultTextBoxDisabledBackgroundColor}"/>

</Trigger>

<Trigger Property="IsFocused" Value="True">

<Setter Property="Background" Value="{StaticResource DefaultTextBoxIsFocusedBackgroundColor}"/>

</Trigger>

<Trigger Property="IsReadOnly" Value="True">

<Setter Property="Background" Value="{StaticResource DefaultTextBoxIsReadOnlyBackgroundColor}"/>

</Trigger>

</Style.Triggers>

</Style>

<Style TargetType="{x:Type telerik:RadMaskedTextInput}" BasedOn="{StaticResource DefaultTelerikMaskedTextInputStyle}"/>

When running the application the slash (in the mask) is shown twice (see attached pictures). Any ideas why ?

Regards,
Hans

MaskedInput (Numeric, DateTime, Text, Currency)

answered on 04 Dec 2019