Hi,

We are experiencing a strange behaviour with GridViewHeaderRow Indicator (top left corner cell of the grid, see http://www.telerik.com/help/wpf/radgridview-styling-indent-cells.html)

It simply disappears when the Theme is changed (between Expression_Dark and Office_Blue), which messes up the grid layout. The Theme change is applied changing Application Resource file containing required Resource Dictionaries from resource dll.


Any ideas?
Stevo

Hi,

I seem to have come across an issue with setting the StartPoint and EndPoint properties of a RadDiagramConnection.  The connection is not redrawn.  Only when I move one of the end does it redraw properly.

It only happens when a StartPoint AND EndPoint is specified (ie not attached to any other shapes via the Source and Target properties).
So I cant programmatically move the connector at the moment which is an issue.  Can you help me please?


Here's a quick sample:

XAML:

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="*"/>

<RowDefinition Height="Auto"/>

</Grid.RowDefinitions>

<telerik:RadDiagram x:Name="_diagram" Grid.Row="0">

<telerik:RadDiagramConnection x:Name="_connector"

StrokeThickness="2"

StartPoint="100,100"

EndPoint="200,200" />

</telerik:RadDiagram>

<Button x:Name="_do"

Grid.Row="1"

Content="Move" Click="_do_Click" />

</Grid>

Code behind:
 
public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

 

}

private void _do_Click(object sender, RoutedEventArgs e)

{

_connector.EndPoint = new Point(300, 300);

}

}

Hello!

I'm using RadDataGridView. I expect, that when data is changed
(i'm using INotify, so that with PropertyChanged event is all ok), aggregate functions have to be recalculated. But this don't happening without additional moves.
On forums there are a lot of advices to use Grid.CalculateAggregate, no matter that it is not good for MVVM. But this function doesn't recalculate anything.
So i tested a lot of variants and i found one, that works how expected, but i think this solve is too complex for this problem.
After data changed i use this code

So my question is: can i recalculate aggregate functions more easily?
More over, attached code works only when i am grouping my collection only by Second property - this is huge problem too.
Here is the simple project which resolve the problem.

Hello,

        I am able to use all the functionality like zoom pan behavior,tooltip etc in my charts. So i have become more familiar with radcartesian chart but I am facing problem in implementing the Zoom and pan behavior in different way.
    
       Currently the built in functionality for pan and zoom behavior functionality works with mouse but i need to develop functionality on button click. i.e. if the user clicks the button then the chart should zoom or get to original state.

 Is there any way to do this functionality?

Thank You in Advance

I'm trying to give the ability to the user to change between two modes ( with/without clustering). Right now I'm "nulling" the itemtemplate and removing the datamappings. what is the best and clean way to achieve this ?


One strage thing that happen swithing from one mode to another is that the points one the map are translated despide the fact the the underline data are unchanged.

The first time I click on the expander for a load on demand item, the little circle appears, but never goes away.  The LoadOnDemand event doesn't appear to fire as well.  When I click on a second on demand item I receive the following exception...

 'LoadingVisualAngleTransform' name cannot be found in the name scope of 'System.Windows.Controls.ControlTemplate'.



Here is the xaml...

Hi,

is it possible to reset grid columns layout on demand, as if new data was just loaded? Sometimes the users resize/reorder columns and we would like to reset all those changes to original (auto size)

Thanks,
Stevo

Hello,

I am using the Q3 2013 Telerik release (2013.3.1016). I am doing a simple binding to the DefaultView of a DataTable. Due to the nature of the requirement, I need to have AutoGenerateColumns set to true, but I'm really not doing anything special otherwise.

What I'm noticing is that when bound to the DefaultView of a DataTable with just 200 rows and 4 columns, the scrolling performance is so bad as to be unusable. It's extremely jerky and very slow, again to the point of being completely unusable. When I bind directly to the same DataTable (without using the DefaultView), there is absolutely no problem with scrolling - it is smooth and seamless.

I've tried everything that I can think of to improve performance, including everything on your RadGridView "Performance Tips and Tricks" at:
http://www.telerik.com/help/wpf/radgridview-performance-tips-tricks.html. The reason that I need to use the DefaultView is for the data binding and error features implemented on the DataView but not the DataTable. I've tried all sorts of hacks with changing data in the DataTable from my ViewModel, firing an event that my codebehind subscribes to, and constantly calling Rebind() on the RadGridView, but I'm still left with issues that require no effort when simply bound to the DefaultView. There just has to be a way to achieve smooth scrolling with a meager 200 rows and 4 columns.

1: The RadGridView is in a Grid with the row height set to star and the column width set to star. There is no "infinity" based measurement going on.

2: I have EnableRowVirtualization set to "True", and I've confirmed that this is working using WPF Inspector (similar to Snoop). Furthermore, I've turned virtualization off, and although scrolling performance becomes perfectly smooth even with the DefaultView, memory usage becomes absurdly high. I will need to keep virtualization on.

3: Originally I had the property bound as part of the DataTable, like this: ItemsSource="{Binding MyDataTable.DefaultView}". After reading your tips and tricks regarding not using property paths to improve performance, I exposed the DefaultView directly on my ViewModel so that the binding became ItemsSource="{Binding MyDefaultView}". This did not improve performance at all.

4: I'm not using any custom styles or templates at all.

5: My WPF application is globally using the Windows8 Theme (StyleManager.ApplicationTheme = new Windows8Theme() is right before InitalizeComponent() on my MainWindow.xaml.cs, also per your documentation). According to your "Tips and Tricks", this uses "lightweight templates" that should improve performance, but again, testing with different themes produces the same terrible scrolling performance.

6: I've tried using ScrollMode="Deferred", but the behavior is not desirable, and even when letting go of the mouse to let the GridView render, there is a very long pause while the data renders.

7: Paging is not a viable solution here and can't be used for several reasons, the most important of which is that the users want to view this GridView like they would in Excel.

With all that in mind, here is the XAML for my RadGridView (note that ImportDataView is the DefaultView of my DataTable, exposed directly from the ViewModel):

<telerik:RadGridView

  Name="PreviewDataGridView"

  ItemsSource="{Binding ImportDataView}"

  EnableRowVirtualization="True"

  SelectionMode="Extended"

  SelectionUnit="Mixed"

  IsReadOnly="False"

  AutoGenerateColumns="True"

  ShowGroupPanel="False"

  ShowInsertRow="False"

  ReorderColumnsMode="None"

  CanUserInsertRows="False"

  CanUserDeleteRows="True"

  CanUserResizeRows="False"

  CanUserSelect="True"

  CanUserSortColumns="False"

  CanUserFreezeColumns="False"

  CanUserReorderColumns="False"

  IsFilteringAllowed="False"

  BorderBrush="Black"

  BorderThickness="1"

  Margin="4, 6, 4, 4"

  Grid.Row="2"

  Grid.Column="0">

 </telerik:RadGridView>

I've spent a ton of time trying to figure this out and could really use some help.

Thanks for your time,
Jon

Hello,

I have a grid that displays two levels.

Applications
   Client Access
    Module Access

When you click the "+" to show the child rows it takes about 8-10 seconds to expand and show the two child tables.  Each table does not have more that 40 records.

1) How can I set the cursor to wait while it happening?
2) How can I speed it up?

Here is the relevant section of the markup.

The viewmodel and all of it's data is set prior to the form's creation.

Any help would be greatly appreciated.

Thanks!
Reid

How Can I Put The PointMark Above AxisY,Like The Attach Image.

I Can't Find A Property To Set.

Help Me,Please.