Questions on UI for WPF Forum

3 answers

139 views

Hi,
I have seen the demo of load on demand in your site but it uses Expanded event. There is event called LoadOnDemand in treeview, so my Question is how can we use this event to load child nodes on demand.

Also when I use Expanded event how will I know which parent node is been clicked .

private void RadTreeView_Expanded(object sender, Telerik.Windows.RadRoutedEventArgs e) {

RadTreeView objRadTreeView = sender as RadTreeView;
}

TreeView

answered on 03 Feb 2009

1 answer

122 views

Interactivity on Gauge

Hi,

since we had a lot of problem with your gauge (missing documentation as first thing) we decided to use other gauges in our silverlight applications.
We choose Dave's Silverlight Dashboard. (http://www.david-black.info/Bashboard/Default.aspx)
The reason - free including sourcecode.
AND - most important - it takes only a few line of XAML to get a nice looking gauge.
These work fine - but only for silverlight.

Your controls (I guess from reading) have the same codebase for Silverlight and WPF.
So since we would need your controls primarily for WPF I ask in this forum.

The above noted controls allowe two-way data binding.
http://www.david-black.info/Bashboard/Extras/Bidirection.aspx

Do you (in the near future) also think about implementing two way binding?

Regards

Manfred

Gauges

answered on 03 Feb 2009

1 answer

121 views

Declarative Initial Sort

I see there are descriptions in the docs/examples on how to do a programmatic initial sort. Is there a way to do a declarative initial sort?
I can't seem to get that to work.

GridView

answered on 02 Feb 2009

1 answer

88 views

Pouplate Data in RadTreeView via collection

I have a collection which contains two properties
1. ABC
2. XYZ

I want to make XYZ as the child of ABC For example:

.ABC1
    .XYZ1
    .XYZ2
.ABC2
    .XYZ3
    .XYZ4

I want to bind this in .XAML.CS page

Currently what I have done in XAML

<Telerik:RadTreeView x:Name="RadTreeView" DockPanel.Dock="Bottom"/>

In XAML.CS page
Collection is CommodityCollection

RadTreeViewItem

aa;

for (int i = 0; i < CommodityCollection.Count; i++) {

aa = new RadTreeViewItem();

aa.Header = CommodityCollection[i].ABC;

this.RadTreeView.Items.Add(aa);

Now my problem is How to add child node in the RadTreeView?

TreeView

answered on 30 Jan 2009

4 answers

145 views

Which event is fired when the carousel item is changed or moved?

Hi..
What event is fired when the carousel is 'moved' either by MoveBy or using the Horiz/Vertical scrollbars?
Can the scrollbars be customized?
Thanks again.!

Carousel

answered on 29 Jan 2009

1 answer

222 views

Drag/Drop exception

Hi,
I've created a simple solution to test the RadTreeview.It just initializes a new ObservableCollection of Items like this:

    
             /// <summary> 
        
                /// Interaction logic for Window1.xaml 
        
                /// </summary> 
        
                public partial class Window1 : Window 
        
                { 
        
                    public ObservableCollection<Item> Items 
        
                    { 
        
                        get { return (ObservableCollection<Item>)GetValue(ItemsProperty); } 
        
                        set { SetValue(ItemsProperty, value); } 
        
                    } 
        
                    // Using a DependencyProperty as the backing store for Items.  This enables animation, styling, binding, etc... 
        
                    public static readonly DependencyProperty ItemsProperty = 
        
                        DependencyProperty.Register("Items", typeof(ObservableCollection<Item>), typeof(Window1)); 
        
                    public Window1() 
        
                    { 
        
                        InitializeComponent(); 
        
                        Items = new ObservableCollection<Item>(); 
        
                        Items.Add(new Item("Item 1")); 
        
                        Items.Add(new Item("Item 2")); 
        
                        Items.Add(new Item("Item 3")); 
        
                    } 
        
                } 
        
                public class Item 
        
                { 
        
                    public string Header { get; set; } 
        
                    public ObservableCollection<Item> Items { get; set; } 
        
                    public Item(string header) 
        
                    { 
        
                        Header = header; 
        
                        Items = new ObservableCollection<Item>(); 
        
                    } 
        
                }

and in xaml created a simple HierarchicalDataTemplate:

    
            <Window.Resources> 
        
                    <HierarchicalDataTemplate x:Key="NodeTemplate" ItemsSource="{Binding Path=Items}"> 
        
                        <StackPanel Orientation="Horizontal"> 
        
                            <TextBlock Text="{Binding Path=Header}"/> 
        
                        </StackPanel> 
        
                    </HierarchicalDataTemplate> 
        
                </Window.Resources> 
        
                <Grid> 
        
                    <Telerik:RadTreeView IsDragDropEnabled="True" Name="t"  
        
                                         ItemsSource="{Binding Path=Items, ElementName=window}"  
        
                                         ItemTemplate="{StaticResource NodeTemplate}"> 
        
                    </Telerik:RadTreeView> 
        
                </Grid>

Now, when I am trying to drag "Item 1" to, lets say, "Item 2" it works ok. But if afterwards I am trying to drag "Item 3" to "Item 1" (that is now under "Item 2") I am getting a NullReferenceException with the following stack trace:

    
               at Telerik.Windows.Controls.RadTreeViewItem.CheckStatePropertyChangedConstrainValue(DependencyObject d, Object newValue) 
        
               at System.Windows.DependencyObject.ProcessCoerceValue(DependencyProperty dp, PropertyMetadata metadata, EntryIndex& entryIndex, Int32& targetIndex, EffectiveValueEntry& newEntry, EffectiveValueEntry& oldEntry, Object& oldValue, Object baseValue, CoerceValueCallback coerceValueCallback, Boolean coerceWithDeferredReference, Boolean skipBaseValueChecks) 
        
               at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, OperationType operationType) 
        
               at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, OperationType operationType, Boolean isInternal) 
        
               at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value) 
        
               at Telerik.Windows.Controls.RadTreeViewItem.set_CheckState(ToggleState value) 
        
               at Telerik.Windows.Controls.RadTreeViewItem.SetCheckStateWithNoPropagation(ToggleState state) 
        
               at Telerik.Windows.Controls.RadTreeViewItem.Render(Boolean recursive) 
        
               at Telerik.Windows.Controls.RadTreeViewItem.OnItemsChanged(NotifyCollectionChangedEventArgs e) 
        
               at System.Windows.Controls.ItemsControl.OnItemCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e) 
        
               at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e) 
        
               at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args) 
        
               at System.Windows.Controls.ItemCollection.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type managerType, Object sender, EventArgs e) 
        
               at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list) 
        
               at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args) 
        
               at System.Collections.Specialized.CollectionChangedEventManager.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args) 
        
               at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args) 
        
               at System.Windows.Data.ListCollectionView.ProcessCollectionChangedWithAdjustedIndex(NotifyCollectionChangedEventArgs args, Int32 adjustedOldIndex, Int32 adjustedNewIndex) 
        
               at System.Windows.Data.ListCollectionView.ProcessCollectionChanged(NotifyCollectionChangedEventArgs args) 
        
               at System.Windows.Data.CollectionView.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args) 
        
               at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e) 
        
               at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item) 
        
               at System.Collections.ObjectModel.Collection`1.Add(T item) 
        
               at System.Collections.ObjectModel.Collection`1.System.Collections.IList.Add(Object value) 
        
               at Telerik.Windows.Controls.RadTreeView.EndDrag() 
        
               at Telerik.Windows.Controls.RadTreeView.HandleMouseUp(MouseEventArgs e) 
        
               at Telerik.Windows.Controls.RadTreeView.RadTreeView_MouseLeftButtonUp(Object sender, MouseEventArgs e) 
        
               at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) 
        
               at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) 
        
               at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) 
        
               at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) 
        
               at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent) 
        
               at System.Windows.UIElement.CrackMouseButtonEventAndReRaiseEvent(DependencyObject sender, MouseButtonEventArgs e) 
        
               at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e) 
        
               at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) 
        
               at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) 
        
               at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) 
        
               at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) 
        
               at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) 
        
               at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) 
        
               at System.Windows.Input.InputManager.ProcessStagingArea() 
        
               at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) 
        
               at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) 
        
               at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) 
        
               at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) 
        
               at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) 
        
               at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) 
        
               at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) 
        
               at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter) 
        
               at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) 
        
               at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) 
        
               at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter) 
        
               at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg) 
        
               at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) 
        
               at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) 
        
               at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) 
        
               at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) 
        
               at System.Windows.Threading.Dispatcher.Run() 
        
               at System.Windows.Application.RunDispatcher(Object ignore) 
        
               at System.Windows.Application.RunInternal(Window window) 
        
               at System.Windows.Application.Run(Window window) 
        
               at System.Windows.Application.Run() 
        
               at Telerik.App.Main() in C:\Documents and Settings\talg\Desktop\TreeViewDrag\Telerik\Telerik\obj\Debug\App.g.cs:line 0 
        
               at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) 
        
               at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) 
        
               at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 
        
               at System.Threading.ThreadHelper.ThreadStart_Context(Object state) 
        
               at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 
        
               at System.Threading.ThreadHelper.ThreadStart()

To make things even worse, it's not constant. It happens in about 50% of the tries.
Thank you in advance,
Tal

TreeView

answered on 29 Jan 2009

1 answer

194 views

How to get GridView to work?

Just installed WPF with VS2008.
Want to get GridView to work.
I installed the .dlls in the toolbox as described here: http://www.telerik.com/help/wpf/adding-radcontrols-to-vs-toolbox.html

The following is what I pieced together from the online demo:

<Page x:Class="TestGridViewAggregate.Page1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"
    Title="Page1">
    <Grid>
       <telerik:RadGridView></RadGridView>
    </Grid>
</Page>

However, it gives me the error:
"The tag 'RadGridView' does not exist in XML namespace clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView'"

GridView

answered on 28 Jan 2009

1 answer

124 views

[Solved] Change sort logic

Hi! Is it possible to change sort logic for grid? For example user apply sorting by some column, but i need to leave one row unsorted (in the end of list).

GridView

answered on 28 Jan 2009

1 answer

142 views

Vertical Navigator

Hi,
I am looking for a vertical navigator control like the navigator on the telerik site or many other sites. I found PanelBar, but Implements this control ICommandSource, so I am able to associate ICommand items with it??
Can I load the content via data binding?

With best regards

Gerhard

PanelBar

answered on 27 Jan 2009

1 answer

1.6K+ views

Datepicker databinding

Hello!

Currently i am working on an application wich needs two datepickers - a StartDate and an EndDate . I am having problems binding this two controls with DateTime properties on an object . For binding values i am using the attribute SelectedDate = {Binding Path=StartDate}, but no binding is created . I would like to know if this is the correct way of binding this control to date fields or if there is another way of doing this... I have search throught the website/documentation but I can't find a proper response.

Any help would be great !
Thanks,
Ivan Frias.

DatePicker

answered on 27 Jan 2009