Questions on UI for WPF Forum

1 answer

102 views

DataForm validation with EF partial class and DataAnnotation

Hi,

I would like to see an example on how to use EF entities as a model with validation being based on EF partial class data annotations.

Thanks in advance

DataForm

answered on 22 Sep 2011

17 answers

371 views

Can't find the busy indicator

I have downloaded the beta q2 2010 wpf controls and i can't see the busy indicator control in my toolbox from within visual studio 2010 wpf web application. Please can you help.

Thanks

BusyIndicator

answered on 22 Sep 2011

3 answers

508 views

RadComboBox Validation

Hi,

I can't find any example of RadComboBox validation.
Would you be so kind to show an example of simple validation ?

Thx,
Julian

ComboBox

answered on 22 Sep 2011

1 answer

39 views

Tabitem not showing up since Q2 2011

Hello.

Since my upgrade from Q1 to Q2 i have a problem with the radtabcontrol.

When my window loads, it no longer shows a tabitem unless i click on the tab itself.
I tried setting the SelectedIndex, SelectedItem, IsSelected = True, everything, i cant achieve to show the tabitems.

HUGE EDIT: It also seems that my dropdowns are getting 'stucked', cant select my items any longer

Any help for this annoying little problem?

Greetings!

TabControl

answered on 22 Sep 2011

1 answer

127 views

BeginEdit-Status

Hi,

I have a problem with the status of BeginEdit.
My scenario:
When I start my application I fill the ScheduleView-Control with appointments (the Control is part of the startwindow).
In the Main.Loaded eventhandler I define a Eventhandler which is fired when the ScheduleViewControl is loaded.

Private Sub Event_Main_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded
            AddHandler Me.radSchedBZP.Loaded, AddressOf Event_radSchedBZP_Loaded
End Sub

Inside the EventHandler Event_radSchedBZP_Loaded I fill the Control with appointments.
The Return-Value of BeginEdit is always "False". What can i do?
Dim app As Telerik.Windows.Controls.ScheduleView.Appointment = Me.radSchedBZP.CreateNew()
Dim bolIsLoaded As Boolean = Me.radSchedBZP.IsLoaded    => is true
                If Me.radSchedBZP.BeginEdit(app) Then
                   With app
                       .Subject = ...
                        .Body = ...
                         ...
                         ...
                        Me.radSchedBZP.Commit()
              endif

Thanks in advance.
kindly regards,
Stefan

ScheduleView

answered on 22 Sep 2011

2 answers

636 views

Removing the maximize and minimize buttons

Hi,
Is there away to remove the maximize and minimize buttons from the Rad Window. I would like to this dynamically in code.

Notes note = new Notes();

int NoteID = note.AddNote(_wardcode);

Telerik.Windows.Controls.RadWindow rw = new Telerik.Windows.Controls.RadWindow();

rw.Width = nw / 5;

rw.Height = nh / 4;

rw.Name = "NotePad" + NoteID;

rw.BorderThickness = new Thickness(0);

rw.BorderBrush = null;

rw.Header = "Note" + DateTime.Now.ToShortDateString();

Grid grid = new Grid();

grid.Background = new SolidColorBrush(System.Windows.Media.Color.FromArgb(255, 240, 255, 255));

System.Windows.Controls.RichTextBox rtxtbx = new System.Windows.Controls.RichTextBox();

rtxtbx.Name = "txtNotePad" + NoteID;

rtxtbx.FontSize = fontsize * 2;

rtxtbx.GotFocus += new RoutedEventHandler(rtxtbx_GotFocus);

rtxtbx.LostFocus += delegate(object sender, RoutedEventArgs e) { rtxtbx_LostFocus(sender, e, NoteID); };

rw.LayoutChangeEnded += delegate(object sender, EventArgs e) { Page2_LayoutChangeEnded(sender, e, NoteID); };

rw.Closed += delegate(object sender, WindowClosedEventArgs e) { Page2_Closed(sender, e, NoteID); };

rw.LostFocus += new RoutedEventHandler(rw_LostFocus);

grid.Children.Add(rtxtbx);

rw.Content = grid;

rw.Show();

Any help would be great

Thanks

Simon

Window

answered on 22 Sep 2011

4 answers

170 views

A problem about DayTemplateSelector with set CalendarButtonStyle

I got a trouble about if I re-Template the CalendarButton, then the RadCalendar doesn't work with DayTemplateSelector.

It doesnot work if I set the DayButtonStyle which inside the style I retemplate the Calendarbutton.

<telerik:RadCalendar DayButtonStyle="{StaticResource CalendarButtonStyle}" >

<telerik:RadCalendar.Style>

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

<Setter Property="DayTemplate" Value="{x:Null}"/>

<Setter Property="DayTemplateSelector" >

<Setter.Value>

<local:CustomTemplateSelector/>

</Setter.Value>

</Setter>

</Style>

</telerik:RadCalendar.Style>

</telerik:RadCalendar>

It will work with selector only if I delete the retemplate part in the CalendarButtonStyle.

How can I use the selector as well as retemplate the CalendarButton.

Hoping for your help. Thanks.

Calendar

answered on 22 Sep 2011

2 answers

239 views

RadDropDownButton.DropDownContent on top of the modalbackground after ShowDialog()

Hi,
I have a question for RadDropDownButton and Modal window in XBAP model. If you click the dropdown item of RadDropDownButton, it will popup the modal window (ShowDialog), but the DropDownContent doesn't disappear and it is on top of the ModalBackground. If you click the other place, the DropDownContent disappears. I want to know how can i resolve it?

<Page x:Class="WpfBrowserApplication1.Page1"

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

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

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

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

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

mc:Ignorable="d"

d:DesignHeight="600" d:DesignWidth="800"

Title="Page1">

<Grid VerticalAlignment="Top">

<StackPanel Orientation="Horizontal" >

<telerik:RadDropDownButton Focusable="False" x:Name="RadDropDownButton1" Width="120" Height="120" Background="{x:Null}" Margin="20" CornerRadius="8" BorderThickness="1" BorderBrush="#E0E0E0" DropDownButtonPosition="Bottom" DropDownIndicatorVisibility="{Binding IsShowContent}">

<StackPanel Orientation="Vertical" Margin="0,0,0,0">

<Image Width="84" Height="84" Source="/WpfBrowserApplication1;component/Images/soundforge.ico" />

<TextBlock HorizontalAlignment="Center" FontWeight="Bold" VerticalAlignment="Center" Text="soundforge" />

</StackPanel>

<telerik:RadDropDownButton.DropDownContent>

<ListBox BorderThickness="0" Focusable="False">

<telerik:RadMenuItem Focusable="False" Height="32" Width="230" Header="Header1" Click="RadMenuItem_Click">

<telerik:RadMenuItem.Icon>

<Image Height="16" Width="16" Source="/WpfBrowserApplication1;component/Images/Bmp.ico" />

</telerik:RadMenuItem.Icon>

</telerik:RadMenuItem>

</ListBox>

</telerik:RadDropDownButton.DropDownContent>

</telerik:RadDropDownButton>

</StackPanel>

</Grid>

</Page>

private void RadMenuItem_Click(object sender, RoutedEventArgs e)

{

RadControlsScenario1 dd = new RadControlsScenario1();

dd.WindowStartupLocation = WindowStartupLocation.CenterScreen;

dd.ShowDialog();

dd.Focus();

}

Thanks,
Ted.

Buttons

answered on 22 Sep 2011

1 answer

463 views

Crash with exception: An item with the same key has already been added

Occasionally, our application crashes shortly after the following exception is record in the log:

08/25/2011 16:00:56.140 FATAL System.ArgumentException: An item with the same key has already been added.

I will include the full stack trace below.

It seems to happen after new items are added to the observable collection that is data bound to the grid, or after properties of items in the grid change, or after a user sorts or groups the grid. I suspect (but am not sure) that the problem is that our entities displayed in the grid have an incorrect overloaded GetHashCode method - the return value of the GetHashCode method may change for a given entity while it is in the collection. We intend to fix this, but the grid should not crash when encountering this situation.

My question is, how can I trap for this type of exception in the RadGridView? I am using MVVM, and the RadGridView is declared in XAML.

Using version 2010.3.1314.35

Thanks
Chris

08/25/2011 16:00:56.140 FATAL System.ArgumentException: An item with the same key has already been added.
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at System.Collections.Generic.Dictionary`2..ctor(IDictionary`2 dictionary, IEqualityComparer`1 comparer)
at Telerik.Windows.Data.Selection.InternalSelectionItemsStorage..ctor(InternalSelectionItemsStorage itemsStorage) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Core\Data\Selection\InternalSelectionItemsStorage.cs:line 16
at Telerik.Windows.Data.Selection.ItemSelectionHandler.BeginSelection() in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Core\Data\Selection\ItemSelectionHandler.cs:line 571
at Telerik.Windows.Controls.DataControl.PersistIsCurrentPropertry(RadRowItem container, Object dataItem) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Core\Data\DataControl.Selection.cs:line 426
at Telerik.Windows.Controls.GridView.GridViewDataControl.PrepareContainerForItemOverride(DependencyObject element, Object item) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\GridViewDataControl.cs:line 7573
at Telerik.Windows.Controls.GridView.BaseItemsControl.Telerik.Windows.Controls.GridView.IGeneratorHost.PrepareItemContainer(DependencyObject container, Object item) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\ItemsControl\BaseItemsControl.cs:line 336
at Telerik.Windows.Controls.GridView.GridViewItemContainerGenerator.System.Windows.Controls.Primitives.IItemContainerGenerator.PrepareItemContainer(DependencyObject container) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\ItemsControl\GridViewItemContainerGenerator.cs:line 260
at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.InsertContainer(Int32 childIndex, UIElement container, Boolean isRecycled) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewVirtualizingPanel.cs:line 2067
at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.AddContainerFromGenerator(Int32 childIndex, UIElement child, Boolean newlyRealized) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewVirtualizingPanel.cs:line 2114
at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.MeasureOverride(Size constraint) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewVirtualizingPanel.cs:line 1215
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
at System.Windows.Controls.ScrollContentPresenter.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()
at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

GridView

answered on 22 Sep 2011

2 answers

280 views

Hide GridViewCheckBoxColumn cells of few rows based on condition

I am using a GridViewCheckBoxColumn. My requirement is i will hide the checkbox in each row if binded value lavel is 6. I had used one Cell Style Selector. If i make the visibility=Collapsed then the cell as well as cell border is also not displayed and looking odd. Please help me how i will be able to collapse few cells based on above condition with the only checkbox collapsed and border remain as it is

public

class CustomVisibilityStyle : StyleSelector

{

public override Style SelectStyle(object item, DependencyObject container)

{

PeopleDataDC ppl = item as PeopleDataDC;

if (ppl.Level == 6)

{

return VisibleStyle;

}

else

{

//((System.Windows.Controls.

ContentPresenter)(((System.Windows.Controls.Grid)(((Telerik.Windows.Controls.GridView.GridViewCell)(container)).Template.LoadContent())).Children[7])).Visibility = Visibility.Collapsed;

return CollapsedStyle;

}

return CollapsedStyle;

}

public Style VisibleStyle { get; set; }

public Style CollapsedStyle { get; set; }

}

GridView

answered on 21 Sep 2011