Questions on UI for WPF Forum

2 answers

126 views

Hi all,

I am using a treeview bound to a hierarchy of ObservableCollections, and the bindings appear fine (including to a dependency property IsExpanded on the objects, and a pdependency property SelectedNode on the hierarchy as a whole) apart from one issue. My user can select a node and a control that fires this method:

public void NewConsolidation(object args)
{
SelectedNode.IsExpanded = true;
var newNode = _hierarchy.AddNode(SelectedNode, "Another Child"); <-- inserts a node
SelectedNode = newNode;
SelectedNode.ParentNode.IsExpanded = true;
SelectedNode.ParentNode.NodeName += "(has children)";
}

With more than one node, collapsed, I see

+ Root Node <-- selected

go to

- Root Node (has children)
First Child
Another Child <-- selected

but with only the root:

Root Node <-- selected

goes to

+ Root Node (has children)

- that is, setting IsExpanded makes no difference if the node in question has never had children and been opened. I can see the binding is working, though, because the name change takes effect. I understand this is related to the treeview items not yet being generated - so how can I force them to be generated for this parent?

TreeView

answered on 07 Mar 2012

1 answer

154 views

KeyTipServices Bug

application crashes on pressing the access key for ribbontab with following error.
System.NullReferenceException was unhandled
Message=Object reference not set to an instance of an object.
Source=Telerik.Windows.Controls.RibbonView
StackTrace:
       at Telerik.Windows.Controls.RibbonView.KeyTipService.ShowVisualChildrenTips(UIElement element)
       at Telerik.Windows.Controls.RibbonView.KeyTipService.ShowVisualChildrenTips(UIElement element)
       at Telerik.Windows.Controls.RibbonView.KeyTipService.ShowVisualChildrenTips(UIElement element)
       at Telerik.Windows.Controls.RibbonView.KeyTipService.ShowVisualChildrenTips(UIElement element)
       at Telerik.Windows.Controls.RibbonView.KeyTipService.ShowVisualChildrenTips(UIElement element)
       at Telerik.Windows.Controls.RibbonView.KeyTipService.ShowVisualChildrenTips(UIElement element)
       at Telerik.Windows.Controls.RibbonView.KeyTipService.ShowVisualChildrenTips(UIElement element)
       at Telerik.Windows.Controls.RibbonView.KeyTipService.<>c__DisplayClass16.<ShowTips>b__8()
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.DispatcherOperation.InvokeImpl()
       at System.Threading.ExecutionContext.runTryCode(Object userData)
       at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Windows.Threading.DispatcherOperation.Invoke()
       at System.Windows.Threading.Dispatcher.ProcessQueue()
       at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
       at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
       at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
       at System.Windows.Application.RunInternal(Window window)
       at System.Windows.Application.Run()

RibbonView and RibbonWindow

answered on 07 Mar 2012

2 answers

173 views

Select item in declaratively bound combobox

Hi

I am using a Telerik radcombobox in a ItemsControl like below. The itemscontrol is populated with some data, and I want the combobox to be default selected to one of the fields in the data. Why doesn't this work?

<Window.Resources>

<CollectionViewSource x:Key="orderViewSource" />

</Window.Resources>

<Grid>

<ItemsControl x:Name="rptOrders" ItemsSource="{Binding Source={StaticResource orderViewSource}}">

<ItemsControl.ItemTemplate>

<DataTemplate>

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="160px" />

<ColumnDefinition Width="Auto" />

</Grid.ColumnDefinitions>

<Label Content="{Binding Path=Name}" Grid.Column="0" VerticalAlignment="Center"></Label>

<telerik:RadComboBox x:Name="rcbOrder" Grid.Column="1" SelectedItem="{Binding Path=Order}">

<telerik:RadComboBoxItem Content="Extra Hot" />

<telerik:RadComboBoxItem Content="Hot" />

<telerik:RadComboBoxItem Content="Mild" />

</telerik:RadComboBox>

</Grid>

</DataTemplate>

</ItemsControl.ItemTemplate>

</ItemsControl>

</Grid>

Data:

((CollectionViewSource)(FindResource("orderViewSource"))).Source = Data.StaffOrders;

public class Data

{

public static ObservableCollection<StaffMember> StaffOrders { get { return //loaddata; } }

public class StaffMember

{

public Int32 StaffID { get; set; }

public String Name { get; set; }

public String Email { get; set; }

public String Order { get; set; }

}

ComboBox

answered on 07 Mar 2012

2 answers

211 views

ListBox given Telerik style ignores HorizontalContentAlignment

Hello,

I think I've found a bug with applying a Telerik style to a ListBox - with the style applied, ListBox items appear as though the ListBox had HorizontalContentAlignment="Left", even when I specify HorizontalContentAlignment="Stretch" .

I've made a little test project to demonstrate, and attached a screen shot of what the app looks like. The only bit omitted is the code-behind - in the window's constructor I add a single empty string to each listbox's items.

You can see that the border on the un-styled listbox extends all the way across the list box, but the border for the telerik styled version is left aligned. Does anyone know why this might be occuring/if there is a workaround I could use?

<Window x:Class="RadControlsWpfApp1.MainWindow"

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

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

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

Title="MainWindow" Height="350" Width="525">

<Window.Resources>

<Style TargetType="ListBox" x:Key="TelerikListBoxStyle" BasedOn="{StaticResource {telerik:ThemeResourceKey ThemeType=telerik:Office_BlueTheme, ElementType=ListBox}}"/>

</Window.Resources>

<StackPanel Orientation="Vertical">

<ListBox Style="{StaticResource TelerikListBoxStyle}" x:Name="telerikStyledListBox" HorizontalContentAlignment="Stretch">

<ListBox.ItemTemplate>

<DataTemplate>

<Label Content="telerik style" BorderThickness="1" BorderBrush="Black"/>

</DataTemplate>

</ListBox.ItemTemplate>

</ListBox>

<ListBox x:Name="listBox" HorizontalContentAlignment="Stretch">

<ListBox.ItemTemplate>

<DataTemplate>

<Label Content="standard style" BorderThickness="1" BorderBrush="Black"/>

</DataTemplate>

</ListBox.ItemTemplate>

</ListBox>

</StackPanel>

</Window>

Regards,
James.

General Discussions

answered on 06 Mar 2012

4 answers

123 views

Bug in Zoom Behaviour

If you zoom in to a tiny scale using the pan & zoom behaviour, the control will throw an exception and crash completely. This is clearly not desired.

Will this be fixed shortly?

ChartView

answered on 06 Mar 2012

0 answers

103 views

Need to change foreground color of text and create a custom column type

I have a few questions I need answered:

1. How do I turn off the grouping feature?

2. When the data in a RadGridView is being exported in text format, is there a way that I can change the format of the data output? Meaning, I don't want the text surrounded by double quotes and I want each column to occupy a certain number of columns.

Thanks

Tony

P.S. I deleted the other questions that were originally in this post as I don't need them answered any more. These two, though, I still need answers to.

Thanks

GridView

asked on 06 Mar 2012

1 answer

363 views

XamlParseException when trying to run application

Hi, I am very new to Telerik, and I am trying to get an old half finished project that uses Telerik working in VS2010. It builds fine but when I try to debug I get an XamlParseException exception, here is the details:

System.Windows.Markup.XamlParseException was unhandled
Message=Cannot create instance of 'OMWindow' defined in assembly 'CCMSOM, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Exception has been thrown by the target of an invocation. Error in markup file 'View/Main/OMWindow.xaml' Line 1 Position 9.
Source=PresentationFramework
LineNumber=1
LinePosition=9
StackTrace:
at System.Windows.Markup.XamlParseException.ThrowException(String message, Exception innerException, Int32 lineNumber, Int32 linePosition, Uri baseUri, XamlObjectIds currentXamlObjectIds, XamlObjectIds contextXamlObjectIds, Type objectType)
at System.Windows.Markup.XamlParseException.ThrowException(ParserContext parserContext, Int32 lineNumber, Int32 linePosition, String message, Exception innerException)
at System.Windows.Markup.BamlRecordReader.CreateInstanceFromType(Type type, Int16 typeId, Boolean throwOnFail)
at System.Windows.Markup.BamlRecordReader.GetElementAndFlags(BamlElementStartRecord bamlElementStartRecord, Object& element, ReaderFlags& flags, Type& delayCreatedType, Int16& delayCreatedTypeId)
at System.Windows.Markup.BamlRecordReader.BaseReadElementStartRecord(BamlElementStartRecord bamlElementRecord)
at System.Windows.Markup.BamlRecordReader.ReadElementStartRecord(BamlElementStartRecord bamlElementRecord)
at System.Windows.Markup.BamlRecordReader.ReadRecord(BamlRecord bamlRecord)
at System.Windows.Markup.BamlRecordReader.Read(Boolean singleRecord)
at System.Windows.Markup.TreeBuilderBamlTranslator.ParseFragment()
at System.Windows.Markup.TreeBuilder.Parse()
at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
at System.Windows.Application.LoadBamlStreamWithSyncInfo(Stream stream, ParserContext pc)
at System.Windows.Application.DoStartup()
at System.Windows.Application.<.ctor>b__0(Object unused)
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)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Threading.ExecutionContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
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)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.TranslateAndDispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Application.RunInternal(Window window)
at CCMSOM.App.Main() in C:\Users\mcgrath1\CCMSOM\trunk\obj\Debug\View\Main\App.g.cs:line 0
at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.Reflection.TargetInvocationException
Message=Exception has been thrown by the target of an invocation.
Source=mscorlib
StackTrace:
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache)
at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Windows.Markup.BamlRecordReader.CreateInstanceFromType(Type type, Int16 typeId, Boolean throwOnFail)
InnerException: System.TypeInitializationException
Message=The type initializer for 'CCMSOM.View.OMWindow' threw an exception.
TypeName=CCMSOM.View.OMWindow
InnerException: System.IO.DirectoryNotFoundException
Message=Could not find a part of the path 'C:\Users\mcgrath1\CCMSOM\trunk\bin\Config\CCMSOM_Config.xml'.
Source=mscorlib
StackTrace:
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at CCMSOM.ViewModel.DataManager.LoadFromXml() in C:\Users\mcgrath1\CCMSOM\trunk\Worker\DataManager.cs:line 96
at CCMSOM.ViewModel.DataManager..ctor() in C:\Users\mcgrath1\CCMSOM\trunk\Worker\DataManager.cs:line 44
at CCMSOM.View.OMWindow..cctor() in C:\Users\mcgrath1\CCMSOM\trunk\View\Main\OMWindow.xaml.cs:line 34
InnerException:

General Discussions

answered on 06 Mar 2012

1 answer

78 views

RadRibbon Wpf Q1 2012 Themes

Is there any COMPLETE example to create a custom theme based on Windows7 theme? I tried a lot of ways to do my own reading this forum but no one supports Q1 2012 version; not even WPF. Thank you!

General Discussions

answered on 06 Mar 2012

1 answer

73 views

How to control the day forecolor when Enabled/Disabled

Hello,

When I display a RadCalendar control in a WPF application with the property IsEnabled=false, and then change the property to true. The number days remain grey and when I move the mouse over them they change it Forecolor to black.

<telerik:RadCalendar Grid.Row="1" Grid.Column="0"  Grid.ColumnSpan="2" Grid.RowSpan="2" MinHeight="620" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
		Columns="4" Rows="3" SelectionMode="Multiple" Name="calMain" IsTodayHighlighted="False" AreWeekNumbersVisible="False"
		FontFamily="Segoe UI" HeaderVisibility="Hidden" ViewsHeaderVisibility="Visible"
		IsEnabled="False" Background="White" Foreground="Black" />

private void btnEnabled_Click(object sender, RoutedEventArgs e)
{            
    calMain.IsEnabled = true;
}

How can I avoid this behaviour?

Regards,
Gerardo.

Calendar

answered on 06 Mar 2012

2 answers

230 views

Why occur IsVisibleChanged and Unloaded when Dragging a RadPane?

I'm wondering about the reason why RadPane and RadDocumentPane fire the IsVisibleChanged and Unloaded events when I'm just dragging the Pane to an other place on the screen (in my case out of my MainWindow)?

IsVisibleChanged might be plausible, because the Pane becomes invisible for the split of a second, but Unloaded is not plausible, because the the Pane still exists.

So to which event do I have to listen if I want to react on the user clicking on the small cross on the pane to close it, if IsVisibleChanged and Unloaded happen also when the user is only dragging the Pane?

Docking

answered on 06 Mar 2012