Questions on UI for WPF Forum

2 answers

126 views

Custom Error message when args.IsParsingSuccessful = false;

Hi,

Wondering if there's a way to override the default error message, "Error" when args.IsParsingSuccessful is set to false in the ParseDateTimeValue event handler. Would like to provide something more descriptive to my users.

Thanks

DatePicker

answered on 29 Sep 2017

2 answers

116 views

RadDiagramConnector

Hello,

Is there a way to customize the shape of each connector? For example the rectangle has four outer connectors, can I make one an arrow point up and another connector for that same shape a connector with an arrow pointing down. I have seen this thread http://www.telerik.com/forums/custom-connector-shape?actionMode=replyThread but that changes all the connectors. I want to change each connector with a unique image.

Your help is appreciated.

Thanks,

Amiel

Diagram

answered on 29 Sep 2017

1 answer

96 views

'Hyperlinks' in templated grid cell breaks the search highlighting

Hello,

I'm looking to create generic templates where displayed info, if of a certain type, would be styled as an hyperlink (blue foreground and underlined). When clicked, the button (My first implementation was using a styled RadButton) sends a command from the code-behind.

Unfortunately, my current implementation even though it works great breaks the Highlighting of the cell and text when searching via the Full search text box on top of the grid.

I have been looking in the source code to understand the way it was implemented, but even templating GridViewCell doesn't seem to work (it never seem to be in Highlighted mode)

Any idea?

Best Regards,

Bastian

GridView

answered on 29 Sep 2017

2 answers

834 views

How to disable the expandred button

In my program, some time i need to disable some propertyDefinition, when the propertyDefinition has NestedProperties, i also need disable the expand to prevent user open or close the expander

i try to set the IsEnable propetry as this code

var expanderButtons= myRadPropertyGrid.ChildrenOfType<RadToggleButton>().Where(b => b.Name == "PART_NestedPropertiesButton").ToList();
expanderButtons.ForEach(t => t.IsEnabled = false);

it is ok at the beginning but when in the case as follows is not

1.when close or open the properties group;

2.when call the NestedProperties.Reset() method

3. when switch the propertyGrid to another one and then switch back

it seems this method can't be done after the second render

how to achieve this?

thank you

PropertyGrid

answered on 29 Sep 2017

2 answers

161 views

How to change the group item panel to wrappanel

Use panelbar How to change the group item panel to a wrappanel

PanelBar

answered on 29 Sep 2017

3 answers

218 views

GridView In RadPane re-get's bound ItemsSource when (un)pinned

Hello,

I've searched the forums and tickets but can't seem to find my specific scenario.

Basically, we have a RadGridView in a RadDocking Pane. The ItemsSource is bound to a property which is an ObservableCollection. The issue we are having is when the pane is either pinned or unpinned, the ItemsSource is retrieved again from the property causing scroll position, filters, etc... to be re-set as if the grid was initially loaded.

Is there any way to prevent this from happening, or could this be a bug? I would like to avoid using an explicit binding mode if possible.

Thanks for the help,
Chris

GridView

answered on 29 Sep 2017

11 answers

354 views

Binding RadPane IsHidden to ViewModel property set to True causes NullReferencedException

When I have my RadPane's IsHidden property bound to a boolean ViewModel property which is set to true, I get an exception from within Telerik's RadDocking code:

System.NullReferenceException was unhandled by user code
Message=Object reference not set to an instance of an object.
Source=Telerik.Windows.Controls.Docking
StackTrace:
at Telerik.Windows.Controls.RadDocking.OnRadPaneClose(Object sender, StateChangeCommandEventArgs args) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\Docking\Docking\Docking\RadDocking.cs:line 834
InnerException:

Right now this is preventing me from implementing a full MVVM using your controls. I'm hoping this is something I've done wrong but if not, is there any workaround that I can use to get me past this before this bug is fixed (it is a bug)?

From my sample project with only this in it:

Here's my View XAML:

<Window x:Class="Telerik_IsHidden_RadPane_Bug.MainView"

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

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

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

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

DataContext="{Binding Main, Source={StaticResource Locator}}">

<Grid>

<telerik:RadDocking Grid.Row="1"

HasDocumentHost="false"

HorizontalAlignment="Stretch"

Margin="0,0,0,32"

Name="radDockingMainWindow"

VerticalAlignment="Stretch" >

<telerik:RadSplitContainer telerik:DockingPanel.InitialSize="300, 200"

Name="AccordionContainer"

InitialPosition="DockedLeft"

Orientation="Vertical" VerticalAlignment="Stretch" >

<telerik:RadPaneGroup MaxWidth="300" x:Name="ToolWindow1Group" >

<telerik:RadPane x:Name="ToolWindow1" Title="" CanUserClose="False" CanUserPin="False" CanFloat="True">

<Button Content="Example" />

</telerik:RadPane>

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

<telerik:RadSplitContainer InitialPosition="FloatingDockable"

telerik:RadDocking.FloatingLocation="450, 250"

telerik:RadDocking.FloatingSize="300, 220" x:Name="uxWindowRadSplitContainer" >

<telerik:RadPaneGroup>

<telerik:RadPane Header="Intellifolders" CanDockInDocumentHost="False" IsHidden="{Binding Path=ToolWindowProp}" x:Name="uxToolWindowRadPane">

<TextBlock Text="Hi" />

</telerik:RadPane>

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

</telerik:RadDocking>

</Grid>

</Window>

And here's my ViewModel code:

using GalaSoft.MvvmLight;

namespace Telerik_IsHidden_RadPane_Bug

{

/// <summary>

/// This class contains properties that a View can data bind to.

/// <para>

/// Use the <strong>mvvminpc</strong> snippet to add bindable properties to this ViewModel.

/// </para>

/// <para>

/// See http://www.galasoft.ch/mvvm/getstarted

/// </para>

/// </summary>

public class MainViewModel : ViewModelBase

{

public bool

ToolWindowProp  

{

get; set; }

/// <summary>

/// Initializes a new instance of the MainViewModel class.

/// </summary>

public MainViewModel()

{

ToolWindowProp = true;

}

Docking

answered on 29 Sep 2017

2 answers

141 views

dynamic RadDiagramToolboxGroupStyle selector

Hello,

I am looking to dynamically set the RadDiagramToolboxGroupStyle based on a style or template selector. I found this : http://www.telerik.com/forums/radwrappanel-instead-of-raduniformgrid-in-raddiagramtoolbox which does work to set the /default/ style of a RadDiagramToolboxGroup created in the application. However, I don't want to change every instance, just a single one, in a single specific situation. If I add x:Key to my style, what do I change in the definition of the RadDiagramToolbox to implement using that new toolbox group style? (better yet, is there a style or template selector I can use to dynamically set that?)

I've tried the SelectedContentTemplate but I can't seem to get that to work

I've tried ItemContainerStyleSelector that didn't work

I've tried ItemContainerStyle inside the HierarchicalDataTemplate applied to the raddiagramtoolbox.ItemTemplate and that also didn't work

Any advice?

Diagram

answered on 28 Sep 2017

1 answer

135 views

RadDataPager & Aggregate function

Dear support representative,

issue is that my RadGridView aggregation functions seems too slow.
I have RadGridView bound with IQueryable collection and it has sum aggregation function enabled for 4 columns.
RadGridView has also paging enabled, is set to normally load 100 rows per page.
In SQL table there are about 120 thousand rows and it takes about 2 sec. to calculate sum on a float type column.
In RadGridView it is about 8 sec. to load initial page with aggregation and 1 sec. if aggregation is not used.
Note that PersistableRadGridView is derived form RadGridView just to have couple more properties related to saving settings.
Any leads?
Currently working on binding aggregation values to VM's property so I would not need to use the sum.

<controls:PersistableRadGridView

x:Name="RadGridView"

Style="{StaticResource RadGridViewWithFilters}"

DockPanel.Dock="Top"

DataLoadMode="Asynchronous"

FrozenColumnCount="{Binding FrozenColumns}"

behaviours:RadGridViewColumnsBinding.ColumnsCollection="{Binding Columns}"

behaviours:DoubleClickBehavior.Command="{Binding ShowDetailsViewCommand}"

behaviours:RadGridViewFilterBehavior.Filters="{Binding ColumnFilterDescriptors}"

behaviours:RadGridViewSortDescriptorsBinding.SortDescriptorsCollection="{Binding ColumnSortDescriptors}"

ShouldCloseFilteringPopupOnKeyboardFocusChanged="True"

SelectionMode="Extended"

IsSynchronizedWithCurrentItem="False"

IsReadOnly="True"

Key="{Binding PersistanceKey}"

RememberFilters="{Binding RememberFilters, Mode=TwoWay}"

IsRememberFilterDisabled="{Binding DisableRememberFilters, Mode=TwoWay}"

ItemsSource="{Binding QueryableData}"

ShowColumnFooters="True">

<telerik:StyleManager.Theme>

<telerik:Windows8Theme/>

</telerik:StyleManager.Theme>

<telerik:RadGridView.Resources>

<Style TargetType="{x:Type telerik:GridViewCell}">

<Setter Property="Template">

<Setter.Value>

<ControlTemplate>

<ContentPresenter x:Name="PART_ContentPresenter" Margin="{TemplateBinding Control.Padding}"

Content="{TemplateBinding ContentControl.Content}"

ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}"

VerticalAlignment="{TemplateBinding Control.VerticalContentAlignment}"

HorizontalAlignment="{TemplateBinding Control.HorizontalContentAlignment}"/>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

</telerik:RadGridView.Resources>

<i:Interaction.Behaviors>

<behaviours:MultiSelectBehavior SelectedItems="{Binding SelectedEntries, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />

<behaviours:RadGridViewRememberFiltersBehavior />

</i:Interaction.Behaviors>

</controls:PersistableRadGridView>

DataPager

answered on 28 Sep 2017

1 answer

304 views

Pie Chart Label Layout overlapping

Hi,

I'm working with Piechart and I have an issue with the labels when I have many slices (please see the attached picture). The labels overlaps and even with changing the PieChartLabelsDisplayMode it would not help much. Is there any way to fix this issue?

Best regards,

Houssem

ChartView

answered on 28 Sep 2017