Questions on UI for WPF Forum

1 answer

87 views

Hello,

I updated my project to Q3 yesterday. When I published it today (via ClickOnce) I got the following while installing:

Exception occurred loading manifest from file Telerik.Windows.Controls.Input.dll: the manifest may not be valid or the file could not be opened.

Are there any new dependencies in Q3? I just installed it and used update functionality in your VS extension.

Best Regards,
Peter Schmidt

General Discussions

answered on 23 Oct 2012

0 answers

133 views

How to bind EF DbContext EntityValidationErrors

How can we bind EF EntityValidationErrors so the corresponding grid cells shows the errors?

Ex: When DbContext.SaveChanges() throws a DbEntityValidationException with ValidationErrors:
The CustomerId field is required.
The Currency field is required.

GridView

asked on 23 Oct 2012

2 answers

694 views

Switch to wait cursor for slow behaviours

Hi!
there are several occasions that the controls do not behave instantly, depending also on the performance capabilities of the current machine and the complexity of the UI.

I see this for instance when expanding/collapsing rows in the RadTreeListView, or expanding/collapsing the RadExpander. Another example is when my user clicks on a grid row and the grid has to switch the display to the editing template of the corresponding column. The same when the user expands a pane in the RadDocking control.

By default these controls do not switch the cursor to the wait cursor, so if these operations take a second to complete, there is no indication that they even have started. So the user tends to click again and again, resulting in strange behavior depending on the occasion.

I'm interesting in just replacing the Arrow cursor with the WaitCursor and not something more complex like using the RadBusyIndicator.

Any solution?

General Discussions

answered on 23 Oct 2012

8 answers

158 views

AlternationCount causes columns to shrink

Hi,

It seems that the RadGridViews AlternationCount causes the columns to shrink. This only happens when the RadGridView is nested within a collapsed expander and a scrollviewer.

<ScrollViewer>

<Expander IsExpanded="False">

<telerik:RadGridView AutoGenerateColumns="False"

ColumnWidth="*"

AlternationCount="2"

ItemsSource="{Binding Products}" />

</telerik:RadGridView>

</Expander>

</ScrollViewer>

When I remove the AlternationCount property or set IsEpanded property on the expander to true - it seems to solve the issue.

I am using the latest version of WPF assemblies .net 4.0.

Regards
Eugene

GridView

answered on 23 Oct 2012

0 answers

130 views

LookupPropertyDefinition with data template

Hi
I have successfully displayed a single property using a LookupPropertyDefinition. The drop down is positioned to the value corresponding the the PropertyGrid value as expected and the other available values are visible when the dropdown arrow is pressed. Here's an example of the XAML:

<telerik:LookupPropertyDefinition x:Name="ccLookupDef"

DisplayName="Lookup Code" Binding="{Binding MyPropCode}"

SelectedValuePath="Code" ItemsSource="{Binding Data.MyCodes, Source={StaticResource proxy}}"

DisplayMemberPath="Description">

</telerik:LookupPropertyDefinition>

I'd would like to apply a data template to the content of the dropdown so I can display formatted content from multiple lookup properties.
I've tried using the EditorTemplate but it fixes the lookup data and no dropdown button is displayed.

Here's the code:

<telerik:LookupPropertyDefinition x:Name="ccLookupDef"

DisplayName="Lookup Code"

SelectedValuePath="Code" ItemsSource="{Binding Data.ChargeCodes, Source={StaticResource proxy}}">

<telerik:LookupPropertyDefinition.EditorTemplate>

<DataTemplate>

<Grid Margin="0 3">

<Grid.ColumnDefinitions>

<ColumnDefinition />

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

<RowDefinition />

</Grid.RowDefinitions>

<TextBlock Grid.Row="0" Text="{Binding MyPropCode}" />

<TextBlock Grid.Row="0" Grid.Column="1" Margin="26,0,0,0" Text="{Binding Description}" />

</Grid>

</DataTemplate>

</telerik:LookupPropertyDefinition.EditorTemplate>

</telerik:LookupPropertyDefinition>

Is it possible to use a data template with LookupPropertyDefinition?
What have I done wrong here?

Regards
Craig

PropertyGrid

asked on 23 Oct 2012

1 answer

117 views

Need to delay the property change

Hi,
I have a project where each change to a property is triggering a complex data calculation to get some metrics in a dashboard. Right now the users like the Numeric up down but times they execute it too fast triggering the calculation a lot of times. I was wondering if there is a way to apply the value changed after a number of sequential clicks. Before going to custom fixes I was wondering if there is way to delay the update when the button is pressed quickly.
Thanks.

NumericUpDown

answered on 23 Oct 2012

5 answers

249 views

Severe Performance Problem When Changing Zoom Levels?

Hello everyone,

I'm having some trouble with the WPF Map Control. On my application I'm generating about 2636 polygons (triangles) and attaching them to the Information Layer.

Each MapPolygon is being created like so:

var polygon=New MapPolygon

{

Fill = currentStyle.FillColor,

Stroke = currentStyle.Stroke,

StrokeThickness = currentStyle.Thickness,

Opacity = currentStyle.Opacity,

Points = new LocationCollection()

{

new Location(point.Y1, point.X1),

new Location(point.Y2, point.X2),

new Location(point.Y3, point.X3)

}

};

This operation works fine and my triangles are properly generated on the map. Pan operations are fluid and without trouble, but zooming operations (in and out) raise severe performance issues, from enourmous memory/processor consumption to a sort of "delay" between the time that I issue the zoom order and the time the order gets carried out by the map.

This problem only occurs with >1000 polygons on the map, regardless of type (rectangles, triangles, etc.).

So, I would like your help on this. First I must ask if there is any known performance limitation/cap related with this matter (gernerating polygons on the map)? If not, can you tell me what might be the cause for this trouble?
And secondly, what avaible workarounds are there that won't imply using a dynamic layer over the map to manage the objects?

Thanks in advance for the help and for the time taken with this matter!

Map

answered on 23 Oct 2012

4 answers

259 views

Scheduleview resource error

I am trying a simple example of using resource groups as per "Programming Telerik ScheduleVIew for WPF/Silverlight (part 1) with simple mods.
I get the following error on the lines that define the groups as below:

Error 1 Only public or internal classes can be used within markup. 'Resource' type is not public or internal.

<telerik:RadScheduleView.GroupDescriptionsSource>

<telerik:GroupDescriptionCollection>

<telerik:ResourceGroupDescription ResourceType="Activity"/>

</telerik:GroupDescriptionCollection>

</telerik:RadScheduleView.GroupDescriptionsSource>

<telerik:RadScheduleView.ResourceTypesSource>

<telerik:ResourceTypeCollection>

<telerik:ResourceType Name="Activity"> (ERROR IS HERE)

<telerik:Resource ResourceName="Morning Meds" />

<telerik:Resource ResourceName="Evening Meds" />

</telerik:ResourceType>

</telerik:ResourceTypeCollection>

</telerik:RadScheduleView.ResourceTypesSource

>





The control worked until I inserted the group code above.





Here is entire XAML

<iCare:BaseUserControl x:Class="POCAClient.Views.TodaysActivities"
                       xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                       xmlns:icc="clr-namespace:POCAClient.UserControls"
                       xmlns:iCare="clr-namespace:POCAClient"
                       xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
                       xmlns:local="clr-namespace:POCAClient.Views"
                        xmlns:schedule="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.ScheduleView"
                       mc:Ignorable="d" d:DesignHeight="450" d:DesignWidth="800"
                       Loaded="BaseUserControl_Loaded" > 
    <iCare:BaseUserControl.Resources> 
        <Style x:Key="ActivityListContainer" TargetType="{x:Type ListBoxItem}" > 
            <Setter Property="Template"> 
                <Setter.Value> 
                    <ControlTemplate TargetType="{x:Type ListBoxItem}"> 
                        <ToggleButton Width="{Binding ActualWidth, ElementName=ItemsList}" x:Name="MainOuterToggleButton" Height="68" IsChecked="{Binding Path=IsSelected, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ListBoxItem}}}"> 
                            <DockPanel DockPanel.Dock="Left" x:Name="PanelListItemBG" HorizontalAlignment="Left" Width="{Binding ActualWidth, ElementName=MainOuterToggleButton}" Height="{Binding ActualHeight,ElementName=MainOuterToggleButton}"> 
                                <Image x:Name="AppointmentImage" DockPanel.Dock="Left" Margin="4,4,2,3" Style="{StaticResource ListBoxItemPhotoStyle}" Source="{Binding Path=AppointmentImage}"></Image> 
                                <TextBlock x:Name="StartTimeTextBlock" DockPanel.Dock="Top" Margin="6,4,2,3" TextTrimming="CharacterEllipsis" Style="{StaticResource ScrollingListItemHeaderStyle }" ToolTip="{Binding Path= Start, StringFormat= hh:mm tt}"  Text="{Binding Path= Start, StringFormat= hh:mm tt}" /> 
                                <TextBlock x:Name="SubjectTextBlock" DockPanel.Dock="Top" Margin="6,2,2,3" TextTrimming="CharacterEllipsis" Style="{StaticResource ScrollingListItemHeaderStyle}" ToolTip="{Binding Path= Subject}" Text="{Binding Path= Subject}" /> 
                            </DockPanel> 
                        </ToggleButton> 
                        <ControlTemplate.Triggers> 
                            <Trigger Property="IsSelected" Value="true"> 
                                <Setter TargetName="PanelListItemBG" Property="Style" Value="{StaticResource SelectedListItemDockPanel}"/> 
                                <Setter TargetName="StartTimeTextBlock" Property="Style" Value="{StaticResource SelectedListItemHeaderTextBlock}" /> 
                                <Setter TargetName="SubjectTextBlock" Property="Style" Value="{StaticResource SelectedListItemSubHeaderTextBlock}" /> 
                            </Trigger> 
                            <Trigger Property="IsSelected" Value="false"> 
                                <Setter TargetName="PanelListItemBG" Property="Style" Value="{StaticResource DeselectedListItemDockPanel}"/> 
                                <Setter TargetName="StartTimeTextBlock" Property="Style" Value="{StaticResource DeselectedListItemHeaderTextBlock}" /> 
                                <Setter TargetName="SubjectTextBlock" Property="Style" Value="{StaticResource DeselectedListItemSubHeaderTextBlock}" /> 
                            </Trigger> 
                        </ControlTemplate.Triggers> 
                    </ControlTemplate> 
                </Setter.Value> 
            </Setter> 
        </Style> 
    </iCare:BaseUserControl.Resources> 
  
    <Border  BorderBrush="{StaticResource BorderBorderBrush}"  BorderThickness="1" 
                    Background="{StaticResource GridBodyBrush}" DockPanel.Dock="Top" Margin="5"> 
        <DockPanel LastChildFill="True"> 
            <Grid> 
                <Grid.ColumnDefinitions> 
                    <ColumnDefinition Width="373*" MinWidth="180"  MaxWidth="520" ></ColumnDefinition> 
                    <ColumnDefinition Width="415*"></ColumnDefinition> 
                </Grid.ColumnDefinitions> 
                <Grid.RowDefinitions> 
                    <RowDefinition Height="40"></RowDefinition> 
                    <RowDefinition Height="*"></RowDefinition> 
                </Grid.RowDefinitions> 
                <DockPanel Grid.Column="0" Grid.Row="0" Grid.ColumnSpan="2"> 
                    <StackPanel Orientation="Horizontal" Grid.ColumnSpan="2" DockPanel.Dock="Top" Height="30" Margin="20,5,5,5" HorizontalAlignment="Left" VerticalAlignment="Center"> 
                        <TextBlock Style="{StaticResource PageHeaderTextBlockStyle}" Grid.ColumnSpan="2" FontSize="24" Foreground="#202C21" Text="Today is: "></TextBlock> 
                        <TextBlock  x:Name="txtTodayDate" Style="{StaticResource PageHeaderTextBlockStyle}" Grid.ColumnSpan="2" Text="df sdfns dnfnsdf sdfsdf nsdfdf nsdfnsdf sdf" FontSize="24" Foreground="#202C21" DockPanel.Dock="Top"/> 
                    </StackPanel> 
                </DockPanel> 
                <DockPanel Grid.Row="1" Grid.ColumnSpan="2" Margin="0,0,415,0" HorizontalAlignment="Left" > 
                    <telerik:RadScheduleView Name="radScheduleViewToday" Width="630" AppointmentsSource="{Binding Appointments}" > 
                       <telerik:RadScheduleView.GroupDescriptionsSource> 
                            <telerik:GroupDescriptionCollection> 
                                <telerik:ResourceGroupDescription ResourceType="Activity"/> 
                            </telerik:GroupDescriptionCollection> 
                        </telerik:RadScheduleView.GroupDescriptionsSource> 
                        <telerik:RadScheduleView.ResourceTypesSource> 
                            <telerik:ResourceTypeCollection> 
                                <telerik:ResourceType Name="Activity"> 
                                    <telerik:Resource ResourceName="Morning Meds" /> 
                                    <telerik:Resource ResourceName="Evening Meds" /> 
                                </telerik:ResourceType> 
                            </telerik:ResourceTypeCollection> 
                        </telerik:RadScheduleView.ResourceTypesSource> 
                        <telerik:RadScheduleView.ViewDefinitions> 
                            <telerik:TimelineViewDefinition MinorTickLength="1h" MajorTickLength="2h" VisibleDays="1"/> 
                        </telerik:RadScheduleView.ViewDefinitions> 
                    </telerik:RadScheduleView> 
                </DockPanel> 
                <DockPanel Grid.Column="1" Grid.Row="1" Margin="42,0,0,0"> 
                    <Border BorderBrush="{StaticResource GridBorderBrush}" BorderThickness="2" Margin="3"
                Background="{StaticResource GridBodyBrush}" Width="384"> 
                        <Grid> 
                            <Grid.RowDefinitions> 
                                <RowDefinition Height="*"/> 
                            </Grid.RowDefinitions> 
  
                            <DockPanel LastChildFill="True" Margin="10,15,0,30" DockPanel.Dock="Left" > 
                                <TextBlock x:Name="txtNotesHeader"  DockPanel.Dock="Top" Margin="3" Foreground="#0C4F95" FontSize="17" FontWeight="Bold" Text="Notes" TextWrapping="WrapWithOverflow"/> 
                                <ScrollViewer DockPanel.Dock="Right" Style="{StaticResource EasyAccessScrollViewer}" HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Auto"> 
                                    <TextBlock  x:Name="txtNotes" Style="{StaticResource TextBlockStyle}" Margin="3,0,10,0" TextWrapping="WrapWithOverflow"></TextBlock> 
                                </ScrollViewer> 
                            </DockPanel> 
                        </Grid> 
                    </Border> 
                </DockPanel> 
            </Grid> 
        </DockPanel> 
    </Border> 
</iCare:BaseUserControl>

ScheduleView

answered on 23 Oct 2012

4 answers

519 views

Outer background when window is modal opened

Hi!,

I was watching a sample when a radWindow is opened in modal way. My question is, if it's possible to change the darkened color due to our app has a background little darkened (xbap) and summarized with telerik control gets too much darkened

thanks

Window

answered on 23 Oct 2012

1 answer

105 views

Export to Excel in Q3 2012

Export from RadGridView til Excel is still a bit strange:

I used the Telerik Wpf example "Word, Excel, CSV Export.

1. I choose "Excel" and I save te file as ExcelTest.xls
- I get a warning about the format when opening the file in Excel
- Most of the data is changed to text/string.
2. I choose "Excel" and I save te file as ExcelTest.xml
- I get a warning about the format when opening the file in Excel
- Most of the data is changed to text/string.
3. I choose "ExcelML" and I save te file as ExcelTest.xml
- All the data is changed to text/string.

What I expected is:
- No warning from Excel about the format.
- Numbers stay numbers, dates stay dates, money stays money... and so on.

What am I doing wrong?

GridView

answered on 23 Oct 2012