Questions on UI for WPF Forum

1 answer

62 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

99 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

153 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

174 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

94 views

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

115 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

1.3K+ 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

1 answer

363 views

Default Value for RadDatePicker

Hi !
I would like to know if it's possible to define the initial date, some sort of default value for this control . I have searched through the properties list and I can't find it .Also I searched through the documentation and found nothing ..
Hope you could help, with an example or point me to the right direction .

Thanks,
Ivan Frias

DatePicker

answered on 27 Jan 2009

1 answer

74 views

Binding Problem

I have a radcarousel bound to an objectdataprovider which has an instance of an observablecollection<T> where T is a personentity class in my system. If I change a property value of one of the personentity (like firstname) those changes are not reflected in the Carousel. Any help will be much appreciated.

Carousel

answered on 26 Jan 2009

3 answers

212 views

Column header missing

Hello,

I'm having an issue where the column header is missing when you add a column to the grid after it has initially been created. I have created a sample project that demonstrates my issue, but it appears I can't attach it so I included the code at the end of this post. To reproduce it, just click on the 'Add Column' button. Am I doing something wrong in my code or is this a bug?

In my example I'm also calling Rebind() and UpdateLayout() on the grid after adding the column because if I don't then no data appears in the column, though the column itself is added.

Note: I borrowed the Custom and Order classes from a sample app on this forum.

Thanks,

Joel

Window1.xaml

    
            <Window x:Class="AddColumnIssue.Window1" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" 
        
                Title="Window1" Height="380" Width="701"> 
        
                <Grid> 
        
                    <Grid.RowDefinitions> 
        
                        <RowDefinition Height="30" /> 
        
                        <RowDefinition Height="*" /> 
        
                    </Grid.RowDefinitions> 
        
                    <Button x:Name="AddColumnButton" Grid.Row="0" Height="23" Width="75" Click="AddColumnButton_Click" >Add Column</Button> 
        
                    <telerik:RadGridView x:Name="ItemsGrid" Grid.Row="1" ItemsSource="{Binding}" AutoGenerateColumns="False" /> 
        
                </Grid> 
        
            </Window>

Window1.cs

    
                public partial class Window1 : Window 
        
                { 
        
                    public Window1() 
        
                    { 
        
                        InitializeComponent(); 
        
                        AddColumns(); 
        
                        this.DataContext = BuildCustomers(); 
        
                    } 
        
                    private void AddColumnButton_Click(object sender, RoutedEventArgs e) 
        
                    { 
        
                        AddColumn(typeof(string), "Email", 200); 
        
                        RefreshGrid(); 
        
                    } 
        
                    private void AddColumns() 
        
                    { 
        
                        AddColumn(typeof(int), "Number", 100); 
        
                        AddColumn(typeof(string), "Name", 100); 
        
                    } 
        
                    private void AddColumn(Type dataType, string name, int width) 
        
                    { 
        
                        GridViewDataColumn column = new GridViewDataColumn(); 
        
                        column.DataType = dataType; 
        
                        column.HeaderText = name; 
        
                        column.UniqueName = name; 
        
                        column.Width = new GridLength(width); 
        
                        column.IsReadOnly = true; 
        
                        ItemsGrid.Columns.Add(column); 
        
                    } 
        
                    private void RefreshGrid() 
        
                    { 
        
                        ItemsGrid.Rebind(); 
        
                        ItemsGrid.UpdateLayout(); 
        
                    } 
        
                    private static ObservableCollection<Customer> BuildCustomers() 
        
                    { 
        
                        ObservableCollection<Customer> customers = new ObservableCollection<Customer>(); 
        
                        ObservableCollection<Order> orders = new ObservableCollection<Order>(); 
        
                        for (int i = 0; i < 10; i++) 
        
                            orders.Add(new Order { Number = i, Details = "Order" + i }); 
        
                        for (int i = 0; i < 100; i++) 
        
                            customers.Add(new Customer { Email = "Mail" + i, Name = "Name" + i, Number = i, Orders = orders }); 
        
                        return customers; 
        
                    } 
        
                }

GridView

answered on 26 Jan 2009