I have a grid with dynamic column.

When i change the display column and then set sorting by code. An exception is appeared:

Object reference not set to an instance of an object.
   at Telerik.Windows.Controls.InternalWindow.WindowWithNoChromeWindowHost.<>c__DisplayClass5.<Open>b__2()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

can you help me?

In PaneGroupDocumentHostStyle, we have 2 buttons:LeftScrollButtonElement and RightScrollButtonElement

My question is: how to increase scroll speed when click these buttons?

when drag a RadPane outside the system  toolbar,then can't drag it back , If iwant to edit the radpane  i must reopen mainwindow

Is any method to prevent dragging outside  the system toolbar?

Hi, 

I'm using the RadRadialGauge and trying to add a range with a colour gradient. I can't see an obvious way to do this. 

Whilst googling I found (http://docs.telerik.com/devtools/xamarin/controls/gauge/getting-started/gauge-getting-started) that it is supported in the Xamarin controls with the GaugeGradientRange class. Is there a WPF equivalent or another way to do this?

Many thanks,

Richard

To me it is great news reading about the RadFileDialogs where I can apply a custom theme! This is a feature I absolutely require for the product I am developing!

However, are there non-modal versions of RadOpenFileDialog, RadOpenFolderDialog and RadSaveFileDialog?

I do not want to block my Application/MainWindow (e.g. with a modal dialog box) at any time, but rather nest the RadFileDialogs within RadDocking.

Hello.

I have RadGridView with Source bound to QueryableDataServiceCollectionView that looks at OData services.

I have paging by 100 by default. And it normally works with filtering and sorting.

By when I run into grouping.. it goes wrong.

I see only first group on page and i can reach next group turning the page many times.

As I see applying the group involves data request with sorting by name of grouped column.

So I get 100 of 1000 first rows of first group and in result I get only one group on page and i must turn the page 10 times to reach next group.

When I collapse first group i certainly dont see others.

How to solve it and see all the groups?

I've got a combobox with MultiSelection, and in order to implement proper binding of selected items I use the following style:

The binding of the selection works both ways, but unfortunately the Text-property isn't initialized to my set of selected items. The combobox remains empty until i open its dropdown, and then the Text-property is set. Seems like a bug, but is there maybe a way to get around it?

Hello,

is there any way how to change NumericUpDown control so that mouse wheel would do large step instead of small step? (users would like to add 10 by mouse wheel but only 1 by up/down arrows)

Thanks,

Karel

    public class Tuple3iConverter : TypeConverter
    {
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            if (context == null)
            {
                return false;
            }
            return ((sourceType == typeof(string)) || base.CanConvertFrom(context, sourceType));
        }
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            if (value is string)
            {
                return value;
            }
            return base.ConvertFrom(context, culture, value);
        }

        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            if (destinationType == typeof(string))
            {
                if (value.Equals("New"))
                    return "lsw822Man";
                else
                    return "NewMan";
            }
            return base.ConvertTo(context, culture, value, destinationType);
        }

        public override TypeConverter.StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
        {
            List<string> genericList = new List<string>();

            genericList.Add("lsw822");
            genericList.Add("lsw833");
            genericList.Add("lsw844");

            return new TypeConverter.StandardValuesCollection(genericList);
        }

        public override bool GetStandardValuesSupported(ITypeDescriptorContext context)
        {
            return true;
        }
    }

+

Second, when I resize the label columns and move the resizer to the leftmost position, each row stops in a different location.
I'm using Windows8Theme and this happens when using Windows8Theme. Please see the images attached.
Thanks!

Hello,

Upon application launch I want a RadPane to be maximized.

The user will not be able to change that status of this pane. It will be always maximized. 

Later on, other panes will be programmatically displayed.  

The user will be able to drag those panes, make them float but will not be able to maximize them.

Attached a xaml fragment I'm currently using.

Thank you,

Zvika