Questions on UI for WPF Forum

1 answer

152 views

Changes to ObservableCollection not reflected in Grid

I have a fairly simple scenario. A non-hierarchical grid bound to an ObservableCollection<T>. The collection resides on a ViewModel. When I load the view, the grid displays data appropriately. A seperate control on the page can force a refresh of data in the ObservableCollection. That is, the collection is cleared and repopulated with new items based on the outside criteria. When the operation completes, I see a new count in the collection, but the rendered grid is unchanged. It was my understanding that the grid would respond to events raised by an ObservableCollection and that no additional handling was necessary. I'm aware of a Rebind method on the grid, which I could call to force a rebind, but as you may be aware, knowledge of controls in a ViewModel is not appropriate.

Any ideas why the grid would not respond to changes in the collection? Also, if I must force this rebind using the Rebind method, what are some strategies to initiate this from the ViewModel without calling the grid directly from the ViewModel?

Thanks...

GridView

answered on 04 Aug 2010

4 answers

144 views

problem when changing Appearance colors

Hello,

I'm currently building an application where the user has some control on how a chart looks.

Every property I'm changing work perfectly except for anything linked to a brush.

The different brushes the the SeriesAppearanceSettings are correctly updated till a Rebind() is called or till the ItemSource is changed when a color change has been previously called. From that point on an ArgumentException is thrown if I attempt to change a previously changed brush:
"The provided DependencyObject is not a context for this Freezable.
Parameter name: context"

here is my method for changing colors:

public void SetFillBrush(Brush color)

{

_lineDefinition1.Appearance.Stroke = color;

_barDefinition1.Appearance.Fill = color;

_areaDefinition1.Appearance.Fill = color;

_lineDefinition2.Appearance.Stroke = color;

_barDefinition2.Appearance.Fill = color;

_areaDefinition2.Appearance.Fill = color;

}

Any help is appreciated.

Chart

answered on 04 Aug 2010

1 answer

79 views

Separate style for grid line

Hello,

I was wondering if there was any planning in separating the style of the AxisStyles.GridLineStyle into MajorGridLineStyle and MinorGridLineStyle.

My application requires to be able to have the minor grid line in a difference color than the major one and I am unable to do so at the moment.

Chart

answered on 04 Aug 2010

4 answers

98 views

Theming controls with a Style in Blend

I'm trying to set a global theme for either Telerik controls or non-telerik controls in xaml using a style. This works in Visual Studio, but not in Blend. I get the error: 'Office_Blue' is not a valid value for the 'Telerik:Windows.Controls.StyleManager.Theme' property on a Setter.

I am using RadControls for WPF Q1 2010 SP2 (version 2010.1.0603) on Windows 7 x64. Here is the xaml:

<Style TargetType="telerik:RadGridView">

<Setter Property="telerik:StyleManager.Theme" Value="Office_Blue" />

</Style>

General Discussions

answered on 04 Aug 2010

2 answers

315 views

Filtered CollectionView as RadGridView

I have a grid that I only ever want to show a subset of data items. I want the user to be able to play around with the filters, so I've created a CollectionView based on the original collection that has the permanent filter set. This CollectionView is set as the grid's ItemsSource so that the permanent filter and the user defined filters (FilterCollection) are kept separate.

However, I get an index out of bounds exception when adding items to the original collection. It looks like this is because the INotifyCollectionChangedEventArgs are specifying an index that is present in the original collection, but too high once the CollectionView filter has been applied.

Is this a strategy that should work and I'm missing something, or does anyone know of a better way to have a filter always set on the grid, despite calling FilterCollection.Clear() (my fallback strategy is to now create a FilterDescriptor to do the same job and re-add it every time I clear the filters).

GridView

answered on 04 Aug 2010

1 answer

97 views

"Row Selection Style" for RadGridView

Hi,

How can i apply "Row Selection Style" for RadGridView using a predefined property.

Thanks,
-Narendra

GridView

answered on 04 Aug 2010

8 answers

123 views

Columns under eachother

Hello,
Would you be so kind as to tell me, is there any way to make child's table columns to appear just under the parant's columns, with no offset.

GridView

answered on 04 Aug 2010

2 answers

92 views

Property to Control Column Drag and Drag Behavior

Hi,

As per my observations on RadGridVIew, i found column drag and drop is allowed by default.

Is there any property which controls the behavior of column drag and drop?

Thanks,
-Narendra

GridView

answered on 04 Aug 2010

4 answers

241 views

Ignore F2, Del, Ins key presses

How can I get a RadGridView to ignore F2, Del, Ins if it has keyboard focus? I have CommandBindings defined to handle these key presses and would like to have these CommandBindings executed. I don't want to ignore all keyboard input in the RadGridView however as I'd still like to navigate the rows in the RadGridView with arrow keys.

GridView

answered on 04 Aug 2010

3 answers

169 views

RadGridView drag multiple items

I am using the drag and drop manager along with the RadGridView to drag one or more items from the RadGridView. This was working fine in previous versions, but the latest 2010.2.714.40 doesn't seem to work any longer. I looked at the demos and it didn't work with multiselect and then dragging either. Did something change that I am not aware of, or did this just break? Thanks!

DragAndDrop

answered on 04 Aug 2010