Questions on UI for WPF Forum

1 answer

193 views

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

191 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

108 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

138 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

1.5K+ 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

397 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

90 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

271 views

[Solved] 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

2 answers

188 views

3D Doughnut Chart Help

Hi,

I'm trying to create a 3D Dougnut Chart, but are having troubles with the Series Mapping. Using the code below, I get the legend to show color coded items equal to the amount of rows in the table. But nothing else displays.

    
            Doughnut3DSeriesDefinition definition = new Doughnut3DSeriesDefinition();  
        
            definition.LegendDisplayMode = LegendDisplayMode.DataPointLabel;  
        
            radChart1.DefaultSeriesDefinition = definition;  
        
            radChart1.DefaultView.ChartLegend.Header = "TEST DATA";  
        
            SeriesMapping seriesMapping = new SeriesMapping();  
        
            ItemMapping itemMapping = new ItemMapping();  
        
            itemMapping.DataPointMember = DataPointMember.YValue;  
        
            itemMapping.FieldName = "DoubleData";  
        
            seriesMapping.ItemMappings.Add(itemMapping);  
        
            ItemMapping itemMapping2 = new ItemMapping();  
        
            itemMapping2.DataPointMember = DataPointMember.Label;  
        
            itemMapping2.FieldName = "StringData";  
        
            seriesMapping.ItemMappings.Add(itemMapping2);  
        
            radChart1.SeriesMappings.Add(seriesMapping);  
        
            DataTable tt = new DataTable();  
        
            tt = GetDataTable();  
        
            radChart1.ItemsSource = tt;

Any help would be much appreciated. Not really sure how the charting works.

Thanks,

Henry

Chart

answered on 26 Jan 2009

1 answer

162 views

Pagination in gridview

Hi,

I am trying to implement pagination in griedview and somehow got success by using the following code

var page = GridViewItemsControl.GetVirtualizingPanel(GridView1.ItemsControl);
page.PageDown();

But I want movenext, moveprevious, move first and move last functionalities. Moreover I wanted to display the current page number also.

Please help me to achive this solution.

Thanks!

Vaithi.

GridView

answered on 26 Jan 2009

	Doughnut3DSeriesDefinition definition = new Doughnut3DSeriesDefinition();

	definition.LegendDisplayMode = LegendDisplayMode.DataPointLabel;

	radChart1.DefaultSeriesDefinition = definition;



	radChart1.DefaultView.ChartLegend.Header = "TEST DATA";

	SeriesMapping seriesMapping = new SeriesMapping();

	ItemMapping itemMapping = new ItemMapping();

	itemMapping.DataPointMember = DataPointMember.YValue;

	itemMapping.FieldName = "DoubleData";

	seriesMapping.ItemMappings.Add(itemMapping);

	ItemMapping itemMapping2 = new ItemMapping();

	itemMapping2.DataPointMember = DataPointMember.Label;

	itemMapping2.FieldName = "StringData";

	seriesMapping.ItemMappings.Add(itemMapping2);

	radChart1.SeriesMappings.Add(seriesMapping);

	DataTable tt = new DataTable();

	tt = GetDataTable();

	radChart1.ItemsSource = tt;