Questions on UI for WPF Forum

12 answers

250 views

How to handle VirtualQueryableCollectionView exceptions?

I have a RadGridView that is bound to VQCV.

internal class TestContext : DbContext

{

public DbSet<City> Cities { get; set; }

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

{

base.OnConfiguring(optionsBuilder);

optionsBuilder.UseSqlite("Data Source=Test.db");

}

internal class City

{

public int Id { get; set; }

}

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

private VirtualQueryableCollectionView view;

public MainWindow()

{

InitializeComponent();

Load();

}

private void Load()

{

var context = new TestContext();

if (File.Exists("Test.db"))

{

File.Delete("Test.db");

}

File.Copy(@"..\..\Test.db", "Test.db");

view = new VirtualQueryableCollectionView(context.Cities);

view.FilterDescriptors.Add(new FilterDescriptor("Id", FilterOperator.IsEqualTo, 123));

GV.ItemsSource = view;

File.Delete("Test.db");

}

The view loads data from Entity Framework context. Sometimes it may throw DB exceptions, they go to the global level (dispatcher).

I don't know how to handle such exceptions.

private void Dispatcher_UnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)

{

e.Handled = true;

}

See my test project: https://github.com/dermeister0/telerik-test

Run the app. Click on column sort icon. Resize window. Result - infinite loop of exceptions. RadGridView tries to measure itself, it gets count of records from VQCV, but the view throws exception.

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> Microsoft.Data.Sqlite.SqliteException: SQLite Error 1: 'no such table: Cities'.

at Microsoft.Data.Sqlite.SqliteException.ThrowExceptionForRC(Int32 rc, sqlite3 db)

at Microsoft.Data.Sqlite.SqliteCommand.<PrepareAndEnumerateStatements>d__62.MoveNext()

at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReader(CommandBehavior behavior)

at Microsoft.Data.Sqlite.SqliteCommand.ExecuteDbDataReader(CommandBehavior behavior)

at System.Data.Common.DbCommand.ExecuteReader()

at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.Execute(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues)

at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteReader(IRelationalConnection connection, IReadOnlyDictionary`2 parameterValues)

at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.BufferlessMoveNext(DbContext _, Boolean buffer)

at Microsoft.EntityFrameworkCore.Storage.Internal.NoopExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)

at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.MoveNext()

at Microsoft.EntityFrameworkCore.Query.QueryMethodProvider.GetResult[TResult](IEnumerable`1 valueBuffers, Boolean throwOnNullResult)

at lambda_method(Closure )

at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider.ResultEnumerable`1.GetEnumerator()

at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext()

at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)

at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass15_1`1.<CompileQueryCore>b__0(QueryContext qc)

at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)

--- End of inner exception stack trace ---

at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)

at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute(Expression expression)

at Telerik.Windows.Data.QueryableExtensions.Count(IQueryable source)

at Telerik.Windows.Data.VirtualQueryableCollectionView.get_ItemCount()

at Telerik.Windows.Data.VirtualQueryableCollectionView.get_InternalCount()

at Telerik.Windows.Data.QueryableCollectionView.get_IsEmpty()

at Telerik.Windows.Data.DataItemCollection.get_IsEmpty()

at Telerik.Windows.Controls.GridView.BaseItemsControl.OnItemsCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Controls.GridView.GridViewDataControl.OnItemsCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Controls.DataControl.OnItemsCollectionChangedDispatch(Object sender, NotifyCollectionChangedEventArgs e)

at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Data.DataItemCollection.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Data.DataItemCollection.OnCollectionViewCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Data.Listener`2.ReceiveWeakEvent(Object sender, TArgs args)

at Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args)

at Telerik.Windows.Data.QueryableCollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)

at Telerik.Windows.Data.VirtualQueryableCollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)

at Telerik.Windows.Data.QueryableCollectionView.RefreshOverride()

at Telerik.Windows.Data.QueryableCollectionView.RefreshOrDefer()

at Telerik.Windows.Data.VirtualQueryableCollectionView.InvalidatePagingAndRefresh()

at Telerik.Windows.Data.QueryableCollectionView.OnSortDescriptorsCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)

at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)

at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Data.RadObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Data.ObservableItemCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Data.RadObservableCollection`1.RaiseCollectionChangedOnResume()

at Telerik.Windows.Data.RadObservableCollection`1.ResumeNotifications()

at Telerik.Windows.Data.CollectionHelper.Reset(IEnumerable source, IList target, Func`2 itemConverter)

at Telerik.Windows.Data.ObservableCollectionManager.HandleCollectionChanged(IList sender, NotifyCollectionChangedEventArgs args)

at Telerik.Windows.Data.ObservableCollectionManager.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs args)

at Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args)

at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Data.RadObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Data.ObservableItemCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Data.RadObservableCollection`1.RaiseCollectionChangedOnResume()

at Telerik.Windows.Data.RadObservableCollection`1.ResumeNotifications()

at Telerik.Windows.Controls.GridView.GridViewDataControl.PerformSorting(GridViewSortingEventArgs sortingArgs)

at Telerik.Windows.Controls.GridView.GridViewDataControl.<>c__DisplayClassb7.<Sort>b__b6()

at Telerik.Windows.Controls.CursorManager.PerformTimeConsumingOperation(FrameworkElement frameworkElement, Action action)

at Telerik.Windows.Controls.GridView.GridViewDataControl.Sort(GridViewColumn column, Boolean appendToExisting)

at Telerik.Windows.Controls.GridView.GridViewHeaderCell.RequestSort(Boolean appendToExisting)

at Telerik.Windows.Controls.GridView.GridViewHeaderCell.PerformUserSort()

at Telerik.Windows.Controls.GridView.GridViewHeaderCell.OnMouseLeftButtonUp(MouseButtonEventArgs e)

at System.Windows.UIElement.OnMouseLeftButtonUpThunk(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.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)

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.RaiseTrustedEvent(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, WindowMessage 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, Int32 numArgs)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

GridView

answered on 12 Nov 2018

1 answer

96 views

Insert row at index with Data Virtualization

How to insert a new row (or a number of rows) at specific index in Virtual Grid that uses Data Virtualization with ADO (not EF)?

VirtualGrid

answered on 12 Nov 2018

1 answer

85 views

couldn't change the theme by "Configure porject" menu

couldn't change the theme by "Configure porject" menu.

although I use theme based on implicit styles, it still cannot go to the second page to select which theme will be applied.

The "Theme button" also didn't show when you select the WPF window

I use visual studio 2017 - version 15.8.9 and windows 10.

Telerik control is 2018.3.1016

-Jacky

General Discussions

answered on 12 Nov 2018

2 answers

111 views

VerticalLinearScale - change properties takes more than 20 seconds

I have VerticalLinearScale with properties:

Min= 0

Max = 100

MajorTickStep = 20

MiddleTicks = 4

by click on button I changed the values of the properties to:

Min= 0
Max = 30000
MajorTickStep = 5000
MiddleTicks = 10

the problem is that it takes too much time till the element render again with the new values

I couldn't attach the sample

Xaml is:

click event is:

private void Button_Click(object sender, RoutedEventArgs e)
{
bar.Min = 0;
bar.Max = 30000;
bar.MajorTickStep = 5000;
bar.MiddleTicks = 10;
}

Thanks,

Shoshana

Gauges

answered on 11 Nov 2018

2 answers

312 views

Can't add RadGridView to window

Every time I try to add a GridView i get "Microsoft Visual Studio XAML Designer has stopped working." Then Close or Debug. Then after clicking Close I get this error in the window:

An Unhandled Exception has occurred

System.ArgumentException
Property 'System.Object ItemsSource' is not defined for type 'Telerik.Windows.Controls.RadGridView'
at System.Linq.Expressions.Expression.Property(Expression expression, PropertyInfo property)
at System.Linq.Expressions.Expression.Property(Expression expression, MethodInfo propertyAccessor)
at Telerik.Windows.Controls.GridView.Design.RadGridViewMetadata.<.ctor>b__0(AttributeCallbackBuilder b)
at MS.Internal.Metadata.MutableAttributeTable.ExpandAttributes(Type type, AttributeList attributes)
at MS.Internal.Metadata.MutableAttributeTable.GetExpandedAttributes(Type type, Object callbackParam, GetAttributesCallback callback)
at MS.Internal.Metadata.MutableAttributeTable.GetCustomAttributes(Type type)
at Microsoft.Windows.Design.Metadata.AttributeTable.GetCustomAttributes(Type type)
at Microsoft.VisualStudio.DesignTools.Designer.Metadata.MetadataStore.<GetAttributes>d__29.MoveNext()
at Microsoft.VisualStudio.DesignTools.Designer.Metadata.TypeUtilities.<MergeAttributesIterator>d__9.MoveNext()
at Microsoft.VisualStudio.DesignTools.Designer.Metadata.TypeUtilities.GetAttributes(MemberInfo memberInfo, Type attributeType, IPlatformMetadata platformMetadata, Boolean checkBaseTypes, Func`3 canContinueCheckingBaseTypes)
at Microsoft.VisualStudio.DesignTools.Designer.Metadata.TypeUtilities.GetAttributes(Type type, IPlatformMetadata platformMetadata, Boolean checkBaseTypes)
at Microsoft.VisualStudio.DesignTools.Designer.Metadata.RuntimeProjectType.GetAllAttributes(Boolean inherit)
at Microsoft.VisualStudio.DesignTools.Designer.Metadata.TypeUtilities.IsTypeSupported(IProjectMetadata typeResolver, ITypeId typeId)
at Microsoft.VisualStudio.DesignTools.Designer.Tools.GenericControlTool.get_IsVisible()
at Microsoft.VisualStudio.DesignTools.Designer.Tools.GenericControlTool.GetExtensibleEquivalent()
at Microsoft.VisualStudio.DesignTools.Designer.ViewModel.Extensibility.ExtensibilityManager.ToolManager_ActiveToolChanged(Object sender, ToolEventArgs e)
at Microsoft.VisualStudio.DesignTools.Designer.Tools.ToolEventHandler.Invoke(Object sender, ToolEventArgs e)
at Microsoft.VisualStudio.DesignTools.Designer.Tools.ToolManager.OnActiveToolChanged(ToolEventArgs e)
at Microsoft.VisualStudio.DesignTools.Designer.Tools.ToolManager.set_ActiveTool(Tool value)
at Microsoft.VisualStudio.DesignTools.Designer.Tools.ToolManager.UpdateHostTool()
at Microsoft.VisualStudio.DesignTools.Designer.Tools.ToolManager.HostToolService_ActiveToolChanged(Object sender, EventArgs e)
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Remoting.LocalEvent`2.<>c__DisplayClass11_0.<Invoke>b__0()
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Remoting.STAMarshaler.Call.Invoke(Boolean waitingInExternalCall)
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Remoting.STAMarshaler.InvokeCall(Call call)
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Remoting.STAMarshaler.ProcessQueue(CallQueue queue)
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Remoting.STAMarshaler.ProcessInboundQueue(Int32 identity)
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Remoting.STAMarshaler.ProcessMessage(Int32 msg, IntPtr wParam, IntPtr lParam, Boolean elevatedQuery, Boolean& handled)
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Remoting.STAMarshaler.OnWindowMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Remoting.MessageOnlyHwndWrapper.WndProc(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.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run(Window window)
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.DesignerProcess.RunApplication()
at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.DesignerProcess.<>c__DisplayClass3_0.<Main>b__0()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

GridView

answered on 09 Nov 2018

4 answers

609 views

Don't drag when selecting text with mouse

I have a RadListBox with DragDropBehavior, the RadListBox itemtemplates contain a textbox. I want the text in the textbox to be selectable using the mouse, but when I drag to select text, the item is dragged instead. Is it possible to disable drag within a control in an itemtemplate in a draggable RadListBox? I tried setting telerik:DragDropManager.AllowCapturedDrag="False" and telerik:DragDropManager.AllowDrag="False" on the textbox but that doesn't help.

Here's my little test project:

using System.Collections.ObjectModel;

namespace ListBoxTest

{

public partial class MainWindow

{

public MainWindow()

{

InitializeComponent();

DataContext = this;

MyCollection = new ObservableCollection<string> { "test text 1", "test text 2", "test text 3", "test text 4", "test text 5", "test text 6" };

}

public ObservableCollection<string> MyCollection { get; private set; }

}

<Window

x:Class="ListBoxTest.MainWindow"

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="MainWindow" Height="500" Width="525">

<telerik:RadListBox

ItemsSource="{Binding MyCollection}">

<telerik:RadListBox.ItemTemplate>

<DataTemplate>

<Grid Height="50" Width="100" Background="LightBlue" telerik:DragDropManager.AllowCapturedDrag="True">

<TextBox

Text="{Binding .}"

VerticalAlignment="Center"

HorizontalAlignment="Center"

telerik:DragDropManager.AllowCapturedDrag="False"

telerik:DragDropManager.AllowDrag="False"/>

</Grid>

</DataTemplate>

</telerik:RadListBox.ItemTemplate>

<telerik:RadListBox.DragDropBehavior>

<telerik:ListBoxDragDropBehavior />

</telerik:RadListBox.DragDropBehavior>

</telerik:RadListBox>

</Window>

ListBox

answered on 09 Nov 2018

3 answers

201 views

How to hide horizontal scroll bar

Hello,

I'm trying to customize the style of the timeline by minimizing controls from the timeline.It will be embedded in a different control that will then perform the manipulation of zooming and scrolling.

1) I have successfully hidden the group header by modifying the TimelineItemContainer ItemsPanelTemplate TimelineItemGroupsPanel padding to be = zero

2) I have not been able to hide the small thin border item that still exists at the top of the timeline

3) I have not been able to hide the horizontal scroll bar at the bottom of the timeline.

I am using the implicit style method and have successfully completed #1.

TimeLine

answered on 09 Nov 2018

12 answers

272 views

RadMap zoomlevel granularity

Is there any chance that we can get the zoomlevel changed to a double so that I can more precisely size my map? Or is there another way to achieve this? E.G. the difference between zoom level 7 and 8 on one of the supplied US state shapefiles is quite a lot. I'd like to be able to zoom in at, say 7.3 or 7.4.

Map

answered on 08 Nov 2018

3 answers

2.3K+ views

Set theme color into SolidColorBrush resource

I am trying to set theme (Fluent) AlternativeBrush into SolidColorBrush resource. I am facing error #FFF2F2F2' is not a valid value for property 'Color'.

Everything is working fine, but problem when I want to define SolidColorBrush resource from theme. This resource will be used in other templates.

For reference following is sample code what I am doing now

<SolidColorBrush Color="{telerik:FluentResource ResourceKey=AlternativeBrush}" x:Key="AlternativeBrush"/>

General Discussions