Questions on UI for WPF Forum

5 answers

124 views

Items in ComboBoxColumn don't get updated when DataContext changes

Hi,

as the thread titles says, if I change the DataContext of a GridView, a ComboBoxColumn whose ItemsSource binds to a collection in the DataContext don't change with changing the DataContext. Instead the values of the DataContext which was assigned before remain.

If I check

this.GridView.Columns[4].GetBindingExpression(GridViewComboBoxColumn.ItemsSourceProperty).DataItem

while debugging, I can see that "DataItem" still references the old DataContext -although-

this.GridView.Columns[4].DataContext

references the newly assigned DataContext.

I do not understand this behavior. Thanks.

GridView

answered on 30 Mar 2011

1 answer

47 views

Memery accululation with UserControls in RadTransition

I have a monitor board application which is simply a full-screen Window with a single RadTransition container in it. I have defined a number of UserControls, each essentially a screen with data-driven reports. The application cycles through a number of these screens continuously during the day, with data refreshing every 15 minutes. My problem is that as the screen cycles, the application grows in memory slightly but continuously until eventually (after eight hours or so) it crashes from lack of memory.

How can I make sure that the previous UserControl is well and truly unloaded and its resources released after a new control is loaded in the RadTransition control?

TransitionControl

answered on 30 Mar 2011

1 answer

364 views

namespace not found error

I downloaded new version of telerik wpf controls. I am adding dll of telerik.windows.controls.dll and telerik.windows.control.gridview with other dlls. I can add the refrernece of gridview namespace but when i am using it by tag <telerikGridView: .. GridView is not visible. Also in the toolbox other controls are coming not the gridview.

GridView

answered on 30 Mar 2011

1 answer

138 views

Ignore enter key on non editable radGridView

Hi there,

I have a command binding in my WPF form, it looks like this,

<UserControl.InputBindings>

<KeyBinding Key="Enter" Command="{Binding Path=AddSelectedProductTypeCommand}"/>

</UserControl.InputBindings>

I also have a grid that is non editable, however pressing the enter key causes a red outline to form around the grid, I suspect that it is grabbing the enter key press and then complaining cause IsReadOnly="True",

How can I tell the grid to ignore any key presses? Or just the enter key... I will take either.

Thanks

GridView

answered on 30 Mar 2011

4 answers

140 views

is not attachable to type elements of type 'RadGridView'

Hi there,

I have a custom MultiSelect attached property, I can use it with a ListBox however I can't seem to use it with your grid view, I get an error that say's property 'IsEnabled' is not attachable to type elements of type 'RadGridView' - Why would it work with a listbox but not a gridview? I mean, it's just an attached property - I don't see what the issue is with a the grid.

Here is the code for the MultiSelect.cs

public static class MultiSelect

{

static MultiSelect()

{

Selector.ItemsSourceProperty.OverrideMetadata(typeof(Selector), new FrameworkPropertyMetadata(ItemsSourceChanged));

}

public static bool GetIsEnabled(Selector target)

{

return (bool)target.GetValue(IsEnabledProperty);

}

public static void SetIsEnabled(Selector target, bool value)

{

target.SetValue(IsEnabledProperty, value);

}

public static readonly DependencyProperty IsEnabledProperty =

DependencyProperty.RegisterAttached("IsEnabled", typeof(bool), typeof(MultiSelect),

new UIPropertyMetadata(IsEnabledChanged));

static void IsEnabledChanged(object sender, DependencyPropertyChangedEventArgs e)

{

Selector selector = sender as Selector;

IMultiSelectCollectionView collectionView = selector.ItemsSource as IMultiSelectCollectionView;

if (selector != null && collectionView != null)

{

if ((bool)e.NewValue)

{

collectionView.AddControl(selector);

}

else

{

collectionView.RemoveControl(selector);

}

static void ItemsSourceChanged(object sender, DependencyPropertyChangedEventArgs e)

{

Selector selector = sender as Selector;

if (GetIsEnabled(selector))

{

IMultiSelectCollectionView oldCollectionView = e.OldValue as IMultiSelectCollectionView;

IMultiSelectCollectionView newCollectionView = e.NewValue as IMultiSelectCollectionView;

if (oldCollectionView != null)

{

oldCollectionView.RemoveControl(selector);

}

if (newCollectionView != null)

{

newCollectionView.AddControl(selector);

}

Thanks for any help...

GridView

answered on 30 Mar 2011

1 answer

94 views

Custom dynamic format of day slots

Hi there, Really getting somewhere with using the ScheduleView, It has enabled to solve a good few problems in recent developments.

One thing that we're trying to achieve now is to Schedule appointments that don't necessarily have an actual start & end datetime but rather plan something in terms of Days.

For instance, if a user wanted to plan a 5 day conference but had no start date would it be possible to show
Day 1 | Day 2 | Day 3 | Day 4 | Day 5

as the major horizontal tick on the TimeLine view (we're using the Timeline view exclusively) Also would it be able to go from Day 1 up to Day N where N is the VisibleDays property?

This would allow the user to build a profile of the event which could be saved somehow and then applied at a different point when the actual dates are known.

To work out the relative day I would have the control manage dates between DateTime.Today up to N visible days and work out the relative days from that but I'd really like to be able to display Day X in the header.

I've tried a few things but nothing seems to work :\

ScheduleView

answered on 30 Mar 2011

7 answers

332 views

RadSlider rangemove disable with mousedrag

Hi

I am setting

StepAction="MoveRange" and range is moving with the mouse click.

But the issue is that when I a dragging mouse then range is changing. How do I disable the Mouse drag.

HorizontalAlignment="Right"

IsSnapToTickEnabled="True"

Margin="0,10,12,52"

Minimum="1"

Name="monthSlider"

Maximum="12"

SmallChange="0"

StepAction="MoveRange"

TickFrequency="1"

LargeChange="3"

SelectionEnd="3"

SelectionStart="1"

IsSelectionRangeEnabled="True"

SelectionRangeChanged="monthSlider_SelectionRangeChanged"

Slider

answered on 30 Mar 2011

2 answers

133 views

Change timeformat

How could I change the timeformat on the RadScheduleView? In RadScheduler I could use TimelineHeaderFormat but that is not available in RadSchedulerView.

//Ola

ScheduleView

answered on 30 Mar 2011

2 answers

591 views

delete a row from raddatagrid by using MVVM pattern

Hi,
How we can a delete a row from raddatagrid by using MVVM pattern?

GridView

answered on 30 Mar 2011

4 answers

205 views

RadColumnSparkline: Declarative Example ?

Hi all,
can you give an example for binding a RadColumnSparkline to data ? I got the RadLinearSparkline working, but the RadColumnSparkline seems to need a different data format.

Thanks in advance
Guido

Sparkline

answered on 30 Mar 2011