Questions on UI for WPF Forum

6 answers

98 views

Blocker bug!!! Binding ListBox to QueryableDataServiceCollectionView crush application

The binding Microsoft ListBox or Telerik ListBox crush application because it set CurrentPosition to wrong value when collection is empty. I hope this problem will be fixed pretty soon.

This binding raise exception in ItemsControlSelector (see bug1.png)

<telerik:RadListBox x:Name="ContentItemsControl" ItemTemplate="{StaticResource GoalSimpleViewTemplate}"

ItemsSource="{Binding Path=ItemsSource, ElementName=MainControl }"

SelectedItem="{Binding Path=SelectedItem, ElementName=MainControl }">

</telerik:RadListBox>

Binding to Microsoft ListBox expose source of the problem in QueryableCollectionView (see bug2.png)

<ListBox x:Name="ContentItemsControl" ItemTemplate="{StaticResource GoalSimpleViewTemplate}"

ItemsSource="{Binding Path=ItemsSource, ElementName=MainControl }"

SelectedItem="{Binding Path=SelectedItem, ElementName=MainControl }">

</ListBox>

Code for model taken from Telerik WPF example

public class MainViewModel : BaswViewModel, INavigationAware

{

private QueryableDataServiceCollectionView<Goal> _goals;

private Goal _selectedGoal;

private bool _isGoalsBusy = true;

public

MainViewModel(IEventAggregator eventAggregator, IRegionManager regionManager, IConnectionService connectionController, IOptionsService optionsService)

: base(eventAggregator, regionManager, connectionController, optionsService)

{

}

public IEnumerable<Goal> Goals

{

get { return IsGoalsBusy ? null : _goals; }

}

public bool IsGoalsBusy

{

get { return _isGoalsBusy; }

set

{

if (_isGoalsBusy != value)

{

_isGoalsBusy = value;

RaisePropertyChanged("IsGoalsBusy");

}

public Goal SelectedGoal

{

get { return _selectedGoal; }

set

{

if (_selectedGoal != value)

{

_selectedGoal = value;

RaisePropertyChanged("SelectedGoal");

}

public bool IsNavigationTarget(NavigationContext navigationContext)

{

SelectedGoal = null;

SelectedActivity = null;

return true;

}

public void OnNavigatedFrom(NavigationContext navigationContext)

{

}

public void OnNavigatedTo(NavigationContext navigationContext)

{

}

protected override void OnModelChanged()

{

base.OnModelChanged();

if (Context != null)

{

UIDispatcher.BeginInvoke(() => { Initialize(); });

}

private void Initialize()

{

_goals = new QueryableDataServiceCollectionView<Goal>(Context, Context.Goals);

_goals.PropertyChanged += this.OnGoalsViewPropertyChanged;

_goals.LoadedData += this.OnGoalsViewLoadedData;

_goals.PageSize = 10;

_goals.AutoLoad = true;

RaisePropertyChanged("Goals");

}

private void OnGoalsViewPropertyChanged(object sender, PropertyChangedEventArgs e)

{

if (e.PropertyName == "IsBusy")

{

this.IsGoalsBusy = _goals.IsBusy;

}

private void OnGoalsViewLoadedData(object sender, LoadedDataEventArgs e)

{

if (e.HasError)

{

e.MarkErrorAsHandled();

}

DataServiceDataSource

answered on 28 Aug 2012

1 answer

112 views

RadDatePicker

Hi,
I am trying to show a date in RadDatePicker and want to make it readonly.
Able to Make the date readonly with IsReadOnly Property, but still able to click on Calendar Button and it drops which is misleading, is there any way to disable the calendar button.

Thanks
Naresh

DatePicker

answered on 28 Aug 2012

14 answers

191 views

Setting IsVisible in AutoGeneratingColumn Event Method kills grid input

I inherited this code from an ex-employee and trying to fix a bug.

When entering data into a GridView and there is a nonVisible column, you can sometimes only enter in 2 rows before you can't type anything else into the cell.

I found that when a column is set to "IsVisible = false" in the "AutoGeneratingColumn" event method it behaves like this. When I comment this line out, you can enter 'n' number of rows. (of course you will see the column that is suppose to be hidden.

XAML

<Telerik:RadGridView x:Name="grdTableData"

Grid.Row="1"

TabIndex="6"

ShowInsertRow="True"

CanUserSortColumns="False"

ActionOnLostFocus="None"

ColumnWidth="*"

FontSize="12"

Margin="5"

SelectionMode="Single"

BorderThickness="1"

IsFilteringAllowed="False"

ShowGroupPanel="False"

BorderBrush="Black"

AutoGenerateColumns="True"

AlternationCount="2"

RowEditEnded="grdTableData_RowEditEnded"

AutoGeneratingColumn="grdTableData_AutoGeneratingColumn">

</Telerik:RadGridView>

C#

public partial class MainWindow : Window

{

DataTable dt = new DataTable();

DataTable emptyDT = new DataTable();

public MainWindow()

{

InitializeComponent();

emptyDT.Columns.Add("Hidden");

emptyDT.Columns.Add("Lookup");

grdTableData.ItemsSource = emptyDT.DefaultView;

dt.Columns.Add("Hidden");

dt.Columns.Add("Lookup");

grdTableData.ItemsSource = dt.DefaultView;

}

private void grdTableData_RowEditEnded(object sender, Telerik.Windows.Controls.GridViewRowEditEndedEventArgs e)

{

ReadDataPage();

}

private void ReadDataPage()

{

// clear grid

grdTableData.ItemsSource = emptyDT.DefaultView;

// repopulate grid

grdTableData.ItemsSource = dt.DefaultView;

}

private void grdTableData_AutoGeneratingColumn(object sender, Telerik.Windows.Controls.GridViewAutoGeneratingColumnEventArgs e)

{

if( e.Column.Header.ToString() == "Hidden" )

e.Column.IsVisible = false; // <---- COMMENT THIS and it works.

}

GridView

answered on 28 Aug 2012

0 answers

117 views

How to show reflection on the bottom of the carousel control?

I wander whether i can show reflection on the bottom of carousel control.
Anyone can help me?

Carousel

asked on 28 Aug 2012

0 answers

111 views

Changing Themes at Run Time

Hi,

Changing Themes is one of the requirement in our project.

Reviewing the below link for the changing the Themes at runtime, but do not find the any Theme files in the installation folder (Binaries.NoXaml) as explained in the step 1.

Could you kindly point to where these files are available or provide with the required files. We are using the Telerik Q1 2012 controls.

We have plans to upgrade to the future Releases as they are available.

Kindly suggest.

Thank you & Regards,

Phani.

General Discussions

asked on 27 Aug 2012

1 answer

141 views

Load only selected controls from isolated storage

Hello!
Is any posibility to loady just one, selected control persisted to isolated storage by method:

private readonly PersistenceManager _persistanceManager;

private readonly IsolatedStorageProvider _isoStorageProvider;

...

_alertsDataService = alertsDataService;

_persistanceManager = new PersistenceManager();

_isoStorageProvider = new IsolatedStorageProvider(_persistanceManager);

...

_isoStorageProvider.SaveToStorage();

I'm using that method:

_isoStorageProvider.LoadFromStorage();

but all controls with telerik:PersistanceManager.StorageId property are loaded then (I want just one of them).

What should I do?

PersistenceFramework

answered on 27 Aug 2012

3 answers

310 views

Expanding 1000+ items freezes application

My application freezes when I try to expand a node on RadTreeView that has over 1000 children. Is there anyway to avoid this? I tried using on-demand loading and it doesn't seem to do anything. So it makes me believe that it's the rendering part of the treeview that is clogging the CPU.

Thanks,
Jin

TreeView

answered on 27 Aug 2012

4 answers

211 views

RADRibbonButton Header display overlaps

I am really unhappy with the way RADRibbonView displays the header of a button and of a group. It the text is a little bit too long and wraps the second live overwrites the first line which looks bad (I ran into a similar issue with the Microsoft Ribbon and that was the main reason I choose Telerik). It looks good in design mode but goes wrong when I run the app.

Is there any way to prevent the RADRibbonButton from shrinking at runtime? Do I have to define a template?

Regards,
Peter

PS: I attached a screenshot of the Ribbon that shows what went wrong.

RibbonView and RibbonWindow

answered on 27 Aug 2012

9 answers

374 views

PresistenceFramework not save groups!

Hello!

We are developing an application using Telerik Controls. When we stand in front of use Presitence Framework, we found that this is not saving groups in RadGridViews

We are using MVVM Light, all RadGridViews ItemSource are bound to ViewModels, all columns are autogenerated.

Saving grouping state is very important in our project - what could we have done wrong?

PersistenceFramework

answered on 27 Aug 2012

0 answers

93 views

How to insert row but disable editing of cells

Hi,

I need to disable editing of cells but be able to insert row. With my current property settings:

CanUserInsertRows="True"
IsReadOnly="False"

It is not possible to insert row while the grid is readonly.

What is the best way of achieving what I want?

GridView

asked on 27 Aug 2012