We are currently evaluating RadTreeView and we have an MVVM sorting scenario that is not working correctly.  Note that everything was working fine with another treeview that was just a standard ItemsControl with some multi-selection capabilities added.  

Certain nodes in the tree are sorted by adding SortDescriptions to ListCollectionView and the sorting works fine when items are added or removed.

The problem I'm having is with updating the sort order in reaction to changes made to the backing viewmodel objects.  I am trying to leverage IEditableCollectionView as described here:  http://drwpf.com/blog/category/collections/.

In the code below, treeViewItem is the RadTreeViewItem that is attached to the modified object:

IEditableCollectionView ev = treeViewItem.ParentTreeView.Items;

if (ev != null)
{
    // this forces the parent to re-sort in response to the sort field changing
    ev.EditItem(treeViewItem.DataContext);
    ev.CommitEdit();
}

The code compiles & runs, but the tree is not updated with the new sort order.

If I instead call refresh, the treeview is updated with the correct sort order:

treeViewItem.ParentTreeView.Items.Refresh();

However, the tree can have hundreds of items in it and I really don't want to call Refresh for performance reasons.  

Is there a way to get this scenario working?  This is the one thing preventing us from being able to use RadTreeView instead of the TreeView we were using before.

I am using a RadRichTextBox as a Rich Content Viewer. (WPF 40)

What is the correct way to Bind TransitionControl with fadeEffect to a read-only RadRichTextBox (RRTB) control?

There is no user input in this process. (Remote display only)

The RadRichTextBox is loaded from Database with Html from code behind on a seperate thread every 5 seconds.  

Is there an example of binding RRTB Data Context to transition, or an example of binding a RRTB Data Template to transition?

Because it’s Read-only, How do I bind the changing Data (with HtmlFormatProvider or RRTB directly)

 Or is there a strictly XAML way to bind with declaratives?

I am trying to keep this as simple as possible.

What do I have to do to the following code to add Fade Transition to RadRichTextBox1?

 

The XAML:

<telerik:RadRichTextBox  x:Name="RadRichTextBox1"

    IsReadOnly="True"

    IsEnabled="True"

    IsSelectionEnabled="False"

    IsFocusable="False"

    HorizontalAlignment="Left"

    VerticalAlignment="Top"

    Height="595"

    Width="1050"

    Margin="20,122,0,0">

</telerik:RadRichTextBox>

 

VB - Code Behind Snippet:

            Dim HtmlMsg as String= MSG_TXT.ToString                             ‘  load  HTML from DB

 

             Me.RadRichTextBox1.IsSpellCheckingEnabled = False

             Me.RadRichTextBox1.Document = Me.htmlFormatProvider.Import(HtmlMsg)    

‘

Hi,

in the RadControls WPF Demo Q3 2011 SP1, the cursor cycles through all enabled fields on a RadDataForm by
pressing the Tab key. That's the expected behavior, but in Version 2012.1.402.40 the cursor cycles through all
enabled fields and their corresponding labels.

Is this correct and the expected behavior or is it possible to configure the TabStop behavior
for the label property?

I looked around for a solution and found the thread label-customization-in-dataformxfield
which guided me to the property LabelStyle.

I copied the posted code an set the property IsTabStop to false, but the XAML didn't compile because of
'TextBlock' TargetType does not match type of element 'ContentControl'.
I set the TargetType to ContentControl and it works as expected.


kind regards,
Hubert

Hello Telerik,

I am unable to Edit the Template of the RadWindow using Expression Blend. I wanted to style the RadWindow Border to White, Customize the Minimize, Maximize and Close Buttons as well as give Shadow Effect to the Border. Can you please give the RadWindow Style & Template?

Thanks,
Neha

Some weeks ago I implemented a CustomGridViewToggleRowDetailsColumn class.  Basically, my data model has objects called Reads which can have zero or more Alarms associated with them.  I've written code which populates an array in the Read view model object with all of the Alarms that are associated with that particular Read.  The class hides the toggle button for the row details if the item in the row doesn't have any rows in that array.  There's another boolean property on the Read view model object called HasAlarms which is true if the Alarms array isn't empty.

In order to improve performance, I need to rework the data access code so it no longer retrieves all of the Alarms assocated with a Read at the time it retrieves the Reads that match the search criteria.  Instead, I am setting the HasAlarms property to true if there are any Alarms for that Read and leaving the array null. I want the row details toggle button to be hidden if HasAlarms is false (easily done with existing code).  Then, when the user clicks on the toggle button, I want to check to see if the Alarms for that Read were retrieved yet, and if not, go get them.

The problem is that I'm getting an error when the Xaml for the RadGridView is being parsed because it doesn't like something about my code.  The error I'm getting is:

System.Windows.Markup.XamlParseException occurred
  Message='Failed to create a 'Click' from the text 'ExpandAlarms_Click'.' Line number '416' and line position '9'.
  Source=PresentationFramework
  LineNumber=416
  LinePosition=9
  StackTrace:
       at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri)
       at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
       at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)
       at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
       at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
       at CarSystem.CustomControls.Searcher.InitializeComponent() in d:\ElsagTFS\EOC4\Client UI\CustomControls\Searcher.xaml:line 1
       at CarSystem.CustomControls.Searcher..ctor() in D:\ElsagTFS\EOC4\Client UI\CustomControls\Searcher.xaml.cs:line 431
  InnerException: System.ArgumentException
       Message=Error binding to target method.
       Source=mscorlib
       StackTrace:
            at System.Delegate.CreateDelegate(Type type, Object target, String method, Boolean ignoreCase, Boolean throwOnBindFailure)
            at System.Xaml.Schema.SafeReflectionInvoker.CreateDelegate(Type delegateType, Object target, String methodName)
            at System.Xaml.EventConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
            at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateObjectWithTypeConverter(ServiceProviderContext serviceContext, XamlValueConverter`1 ts, Object value)
            at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateFromValue(ServiceProviderContext serviceContext, XamlValueConverter`1 ts, Object value, XamlMember property)
            at MS.Internal.Xaml.Runtime.PartialTrustTolerantRuntime.CreateFromValue(ServiceProviderContext serviceContext, XamlValueConverter`1 ts, Object value, XamlMember property)
            at System.Xaml.XamlObjectWriter.Logic_CreateFromValue(ObjectWriterContext ctx, XamlValueConverter`1 typeConverter, Object value, XamlMember property, String targetName, IAddLineInfo lineInfo)
       InnerException:

Here's the code for my class.  Please help me fix this problem.


Tony

I have a RadDataForm, with a DataFormDataField, that is bound to a Decimal property.

I'm trying to get validation working, and I'm having some issues:

1. When I have a validation error, and the DataFormDataField does not have its Label property set, the error is displayed using the name of the field, instead of the [Display(Name="xxx")] annotation.
2. When I enter invalid characters (non-numeric), my Decimal property's setter is never called, instead the form displays a "Value 'xxx' could not be converted" error. I need to display a more meaningful message.
3. I have a listener on the RadDataForm's ValidatingItem event - but that event is not called when I move focus from one field to another (which is when the above error messages appear.)
4. I need to some level of validation on each keystroke. If the field can only hold 12 characters, an attempt to type a 13th should do nothing. If the user is typing in a field that can only hold numeric values, typing non-numeric characters should do nothing - the keyboard event should be swallowed, and the character should not appear in the field.  At a minimum, letters would be filtered, it'd be better if we could look at the new character and the existing content, and decide whether the new character can be applied without invalidating the field.  (If the field is bound to a decimal, it should allow numbers, and one decimal point. A second decimal point should be swallowed.)

Hi,
I would like to change the +/- symbol on a GridViewToggleRowDetailsColumn so i have created below ControlTemplate

I can set color to the chart axis lines for a 2D chart by setting the AxisElementBrush of the chart control just like this:

mChartControl.AxisElementBrush = new SolidColorBrush(value);

This does not work with 3D charts. How can I get the grid lines to change colors when the chart is 3D? Why is it that I am running into so many problems to get a 3D chart to act the same as a 2D chart? dll version 2011.2.920.40 Thanks, James

Hi. I have a small problem with RadDocking that I'm hoping there is some functionality to solve. We are using the Save/Load Layout methodology for capturing the state of our RadPanes and other controls. This provides a chunk of XML that we save out and load in as required. Unlike the PersistenceManager methodology though, there seems to be no way to prevent certain properties from being added to the XML chunk that's generated when SaveLayout is called on a RadDocking control. When developers change the header of a RadPane, for instance, the change is overwritten when the XML is passed to LoadLayout (even when the RadPane's SerializationTag is changed, which is very strange). I'm wondering if there's some way of preventing the Header property from appearing in the XML, or if we need to take steps to remove it ourselves. It's either this or ignore all of the XML, and leave the controls to assume their default configuration, overwriting the XML.

Many thanks,
- Chris M.