Questions on UI for WPF Forum | Telerik Forums

or

25,631 questions

3 answers

172 views

Trigger loading by hand

Hello

Can I load some portion of data programmatically? For example:

class Work { public string WorkTitle { get; set; } }

var query = generateQueryFor<Work>.OrderBy(w => w.WorkTitle);

var virtualQuery = new VirtualQueryableCollectionView(query) { LoadSize = 50 };

virtualQuery.ItemsLoading += (sender1, eventArgs1) =>

{

//event doesn't firing

};

virtualQuery.ItemsLoaded += (sender2, eventArgs2) =>

{

//event doesn't firing

};

// how force to load some data?

// GetItemAt doesn't loads any data

var row0 = virtualQuery.GetItemAt(0);

var row1 = virtualQuery.GetItemAt(1);

var row2 = virtualQuery.GetItemAt(2);

Data Virtualization

answered on 16 Jul 2015

1 answer

429 views

RadMaskedNumericInput does not bind decimal datatype correctly

Hi,

I am using RadMaskedNumericInput control for Percent input. I have decimal datatype property bound to the control. When i try to update value in control as number 55, it updates the background property as "0.55".

<telerik:RadMaskedNumericInput x:Name="uxPercentToPay" Grid.Row="6" Grid.Column="1" Margin="2,3" Width="120" Style="{StaticResource RadMaskedNumericInputStyle}" Validation.ErrorTemplate="{x:Null}" UpdateValueEvent="PropertyChanged" AutoFillNumberGroupSeparators="False" MaskedInput:MaskedInputExtensions.Maximum="100"MaskedInput:MaskedInputExtensions.Minimum="0" Mask="p2.2" Placeholder=" " AutoFillZeros="True"

Value="{Binding PercentToPay,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"

MaskedInput:MaskedInputExtensions.IsEditorTabStop="True"/>

Background property:

public decimal PercentToPay

{

get

{

return _percentToPay;

}

set

{

if (_percentToPay == value)

{

return;

}

_percentToPay = value;

RaisePropertyChanged(() => PercentToPay);

}

}

Please let me know, what could be the possible miss out here.

Thanks in Advance,

Sagar

<telerik:RadMaskedNumericInput x:Name="uxPercentToPay" Grid.Row="6" Grid.Column="1" Margin="2,3" Width="120" Style="{StaticResource RadMaskedNumericInputStyle}" Validation.ErrorTemplate="{x:Null}" UpdateValueEvent="PropertyChanged" AutoFillNumberGroupSeparators="False" MaskedInput:MaskedInputExtensions.Maximum="100"MaskedInput:MaskedInputExtensions.Minimum="0" Mask="p2.2" Placeholder=" " AutoFillZeros="True"

Value="{Binding PercentToPay,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"

MaskedInput:MaskedInputExtensions.IsEditorTabStop="True"/>

<telerik:RadMaskedNumericInput x:Name="uxPercentToPay" Grid.Row="6" Grid.Column="1" Margin="2,3" Width="120" Style="{StaticResource RadMaskedNumericInputStyle}" Validation.ErrorTemplate="{x:Null}" UpdateValueEvent="PropertyChanged" AutoFillNumberGroupSeparators="False" MaskedInput:MaskedInputExtensions.Maximum="100"MaskedInput:MaskedInputExtensions.Minimum="0" Mask="p2.2" Placeholder=" " AutoFillZeros="True"

Value="{Binding PercentToPay,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"

MaskedInput:MaskedInputExtensions.IsEditorTabStop="True"/>

<telerik:RadMaskedNumericInput x:Name="uxPercentToPay" Grid.Row="6" Grid.Column="1" Margin="2,3" Width="120" Style="{StaticResource RadMaskedNumericInputStyle}" Validation.ErrorTemplate="{x:Null}" UpdateValueEvent="PropertyChanged" AutoFillNumberGroupSeparators="False" MaskedInput:MaskedInputExtensions.Maximum="100"MaskedInput:MaskedInputExtensions.Minimum="0" Mask="p2.2" Placeholder=" " AutoFillZeros="True"

Value="{Binding PercentToPay,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"

MaskedInput:MaskedInputExtensions.IsEditorTabStop="True"/>

MaskedInput (Numeric, DateTime, Text, Currency)

answered on 16 Jul 2015

1 answer

77 views

Deny drop in the grid view ?

Hey all.

We currently have a data grid which we allow the user to drop a list of files onto (from file explorer, for example). We would like to deny the drop if there are invalid files in the list, but I can't see how to do that with the GridView (the TreeView seems to have a much richer drag/drop implementation).

Could I please have some guidance, as I'm at a bit of a loss.

Thanks.

answered on 16 Jul 2015

3 answers

187 views

[Solved] Touch Screen

I am using the TreeListView on an app that is used on a Touch Screen device. I am getting some odd lockups. Is there anything I need to know or consider when using a touch screen computer.

I'm using your Windows8Touch theme and it is a windows 8 OS.

answered on 15 Jul 2015

7 answers

256 views

InvalidOperationException when showing Backstage a second time

Hi there,

I am experiencing an intermittent InvalidOperationException when attempting to show the backstage of a RadRibbonView for the second or subsequent time.

The cause seems to be that the backstage control has not been properly removed from the BackstageAdorner to which it was originally added.

Unfortunately, all of the functionality is either private or internal so it does not appear as though there is any way I can code around this.

Any suggestions would be greatly appreciated.

Thanks.

Here is the call stack related to the error. (since .txt attachments aren't allowed?)

  PresentationFramework.dll!System.Windows.FrameworkElement.ChangeLogicalParent(System.Windows.DependencyObject newParent) Unknown
  PresentationFramework.dll!System.Windows.FrameworkElement.AddLogicalChild(object child) Unknown
> Telerik.Windows.Controls.RibbonView.dll!Telerik.Windows.Controls.RibbonView.BackstageAdorner.BackstageAdorner(System.Windows.FrameworkElement adornedElement, Telerik.Windows.Controls.RadRibbonBackstage backstage, double topOffset) Line 30 C#
  Telerik.Windows.Controls.RibbonView.dll!Telerik.Windows.Controls.RadRibbonView.CreateBackstageAdorner() Line 1419 C#
  Telerik.Windows.Controls.RibbonView.dll!Telerik.Windows.Controls.RadRibbonView.ShowBackstage() Line 2536 C#
  Telerik.Windows.Controls.RibbonView.dll!Telerik.Windows.Controls.RadRibbonView.ToggleIsBackstageOpen() Line 2655 C#
  Telerik.Windows.Controls.RibbonView.dll!Telerik.Windows.Controls.RadRibbonView.OnIsBackstageOpenChanged(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs e) Line 1960 C#
  WindowsBase.dll!System.Windows.DependencyObject.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
  PresentationFramework.dll!System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty dp, object value, System.Windows.PropertyMetadata metadata, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType, bool isInternal) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.SetValue(System.Windows.DependencyProperty dp, object value) Unknown
  Telerik.Windows.Controls.RibbonView.dll!Telerik.Windows.Controls.RadRibbonView.IsBackstageOpen.set(bool value) Line 667 C#
  Telerik.Windows.Controls.RibbonView.dll!Telerik.Windows.Controls.RadRibbonView.AppButtonMouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e) Line 1258 C#
  PresentationCore.dll!System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate handler, object target) Unknown
  PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source, System.Windows.RoutedEventArgs args, bool reRaised) Unknown
  PresentationCore.dll!System.Windows.UIElement.ReRaiseEventAs(System.Windows.DependencyObject sender, System.Windows.RoutedEventArgs args, System.Windows.RoutedEvent newEvent) Unknown
  PresentationCore.dll!System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate handler, object target) Unknown
  PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source, System.Windows.RoutedEventArgs args, bool reRaised) Unknown
  PresentationCore.dll!System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject sender, System.Windows.RoutedEventArgs args) Unknown
  PresentationCore.dll!System.Windows.UIElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs args) Unknown
  PresentationCore.dll!System.Windows.Input.InputManager.ProcessStagingArea() Unknown
  PresentationCore.dll!System.Windows.Input.InputProviderSite.ReportInput(System.Windows.Input.InputReport inputReport) Unknown
  PresentationCore.dll!System.Windows.Interop.HwndMouseInputProvider.ReportInput(System.IntPtr hwnd, System.Windows.Input.InputMode mode, int timestamp, System.Windows.Input.RawMouseActions actions, int x, int y, int wheel) Unknown
  PresentationCore.dll!System.Windows.Interop.HwndMouseInputProvider.FilterMessage(System.IntPtr hwnd, MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) Unknown
  PresentationCore.dll!System.Windows.Interop.HwndSource.InputFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) Unknown
  WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) Unknown
  WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) Unknown
  WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) Unknown
  WindowsBase.dll!MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(object source, System.Delegate method, object args, int numArgs, System.Delegate catchHandler) Unknown
  WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) Unknown
  WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) Unknown
  [Native to Managed Transition]
  [Managed to Native Transition]
  WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame frame) Unknown
  PresentationFramework.dll!System.Windows.Application.RunInternal(System.Windows.Window window) Unknown
  PresentationFramework.dll!System.Windows.Application.Run() Unknown
  ocontrol.exe!TracRite.Optimum.App.Main() C#

RibbonView and RibbonWindow

answered on 15 Jul 2015

1 answer

137 views

Vertical Scrolling - Keep Column Width

We are using SizeToCells and * sizing with some RadGridView columns. Our problem is that vertical scrolling is resizing the columns and even the RadGridView as we scroll down/up the data. What we are looking for is a way to calculate the column widths based on the initial data but not recalculate as we scroll down/up.

answered on 15 Jul 2015

3 answers

132 views

Adding ToolTip to DataFormDataField

How do I add tooltip to DataFormDataField. I have tried:

Tooltip = " "

telerik:RadToolTipService.ToolTipContent=" "

but none of them are working on DataFormDataField.

answered on 15 Jul 2015

12 answers

406 views

Column width ignored inside DataTemplate

I am using RadGridView inside a DataTemplate in RadTabControl. However, the Width property in GridViewDataColumn is completely ignored and appeared to be set to Auto.

What I am trying to achieve is that I want the column to take up the remaining space by using Width="*" and the context I am using it is in RadTabControl.

Here is the code - comparing RadGridView outside DataTemplate, DataGrid, and RadGridView inside DataTemplate.
Here is the result -
RadGridView outside DataTemplate : The * works as expected and take up the remaining grid space.
DataGrid inside DataTemplate : The * works as expected and take up the remaining grid space.
RadGridView inside DataTemplate: The * is ignored and does not work. I have tried to use a specific number like 200 and it is ignored as well.

Is this a bug in how the Width is being handled?

Please assist.
Thanks,
Terry

<telerikGrid:RadGridView AutoGenerateColumns="False" Grid.Row="3">

<telerikGrid:RadGridView.Columns>

<telerikGrid:GridViewDataColumn Header="Name" Width="*" />

</telerikGrid:RadGridView.Columns>

</telerikGrid:RadGridView>

<ListView Grid.Row="1" ItemsSource="{Binding Selections}">

<ListView.ItemTemplate>

<DataTemplate>

<StackPanel>

<DataGrid AutoGenerateColumns="False">

<DataGrid.Columns>

<DataGridTextColumn Header="name" Width="*" />

</DataGrid.Columns>

</DataGrid>

<telerikGrid:RadGridView AutoGenerateColumns="False">

<telerikGrid:RadGridView.Columns>

<telerikGrid:GridViewDataColumn Header="Name" Width="*" />

</telerikGrid:RadGridView.Columns>

</telerikGrid:RadGridView>

</StackPanel>

</DataTemplate>

</ListView.ItemTemplate>

</ListView>

answered on 15 Jul 2015

2 answers

610 views

I can't get the legend to show up on RadCartesianChart

I have a project where we have an unknown number of series to display and I'd like to make a legend. From the online documentation, it looks like telerik supports all of this, so I must be doing something wrong : the legend just doesn't show up. Could anyone point me to the problem ? Thank you very much.

Out of curiosity, I would also like to know if there's a way to bind to the series properties once they're displayed - e.g. if I had to design a legend by hand, how would I bind to the colours of the series if I don't know them before-hand (because they're dependent on the chosen palette) ?

I've reproduced this in a smaller project, here's my code :

01.using System.Collections.Generic;

02.using System.Windows;

03.

04.namespace telerikTestSandbox

05.{

06. public class Serie

07. {

08. public Serie(string title)

09. {

10. Title = title;

11. Data = new List<Point>() { new Point(1, 5), new Point(2, 15), new Point(3, 10) };

12. }

13.

14. public List<Point> Data { get; set; }

15.

16. public string Title { get; set; }

17. }

18.}

01.using System.Collections.Generic;

02.using System.Windows;

03.

04.namespace telerikTestSandbox

05.{

06. /// <summary>

07. /// Interaction logic for MainWindow.xaml

08. /// </summary>

09. public partial class MainWindow : Window

10. {

11. public MainWindow()

12. {

13. DataContext = this;

14.

15. Serie serie2 = new Serie("Test2");

16. serie2.Data = new List<Point>() { new Point(1, 25), new Point(2, 30), new Point(3,20)};

17. ParticipationData.Add(serie2);

18. Serie serie3 = new Serie("Test3");

19. serie3.Data = new List<Point>() { new Point(1, 15), new Point(2, 20), new Point(3, 25) };

20. ParticipationData.Add(serie3);

21. }

22.

23. public List<Serie> ParticipationData

24. {

25. get { return (List<Serie>)GetValue(ParticipationDataProperty); }

26. set { SetValue(ParticipationDataProperty, value); }

27. }

28.

29.

// Using a DependencyProperty as the backing store for ParticipationData.  This enables animation, styling, binding, etc...

30. public static readonly DependencyProperty ParticipationDataProperty =

31. DependencyProperty.Register("ParticipationData", typeof(List<Serie>), typeof(MainWindow), new PropertyMetadata(new List<Serie>() {new Serie("Test1")}));

32. }

33.}

01.<Window x:Class="telerikTestSandbox.MainWindow"

02. xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

03. xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

04. Title="MainWindow" Height="350" Width="525"

05. xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

06. xmlns:sys="clr-namespace:System;assembly=mscorlib"

07. xmlns:local="clr-namespace:telerikTestSandbox"

08. >

09. <Window.Resources>

10. <Style x:Key="PerformanceVisualisationStyle" TargetType="telerik:ScatterLineSeries" BasedOn="{StaticResource ScatterLineSeriesStyle}">

11. <Setter Property="PointSize" Value="3,3" />

12. <Setter Property="RenderMode" Value="Full" />

13. <Setter Property="Grid.IsEnabled" Value="True" />

14. <Setter Property="Grid.Visibility" Value="Visible" />

15. <Setter Property="Grid.ShowGridLines" Value="True"/>

16. <Setter Property="LegendSettings">

17. <Setter.Value>

18. <telerik:SeriesLegendSettings Title="{Binding Title}"/>

19. </Setter.Value>

20. </Setter>

21. </Style>

22. </Window.Resources>

23.

24. <Grid>

25. <Grid.RowDefinitions>

26. <RowDefinition />

27. <RowDefinition />

28. </Grid.RowDefinitions>

29. <telerik:RadCartesianChart Grid.Row="0" x:Name="Chart" Palette="Lilac" Height="250" Width="500">

30. <telerik:RadCartesianChart.HorizontalAxis>

31. <telerik:LinearAxis Title="Position" />

32. </telerik:RadCartesianChart.HorizontalAxis>

33. <telerik:RadCartesianChart.VerticalAxis>

34. <telerik:LinearAxis Title="Value" />

35. </telerik:RadCartesianChart.VerticalAxis>

36. <telerik:RadCartesianChart.SeriesProvider>

37. <telerik:ChartSeriesProvider Source="{Binding ParticipationData}">

38. <telerik:ChartSeriesProvider.SeriesDescriptors>

39. <telerik:ScatterSeriesDescriptor ItemsSourcePath="Data" XValuePath="X" YValuePath="Y"

40. Style="{StaticResource PerformanceVisualisationStyle}">

41. </telerik:ScatterSeriesDescriptor>

42. </telerik:ChartSeriesProvider.SeriesDescriptors>

43. </telerik:ChartSeriesProvider>

44. </telerik:RadCartesianChart.SeriesProvider>

45.

46. <telerik:RadCartesianChart.Grid>

47. <telerik:CartesianChartGrid MajorXLinesRenderMode="All" MajorLinesVisibility="XY" />

48. </telerik:RadCartesianChart.Grid>

49. </telerik:RadCartesianChart>

50.

51. <telerik:RadLegend Grid.Row="1" Background="White"

52. BorderBrush="Black"

53. BorderThickness="1"

54. Items="{Binding LegendItems, ElementName=Chart}"

55. HorizontalAlignment="Right"

56. VerticalAlignment="Top" />

57. </Grid>

58.</Window>

answered on 15 Jul 2015

12 answers

1.0K+ views

How to add dynamic RadCartesianChart.Series into my ChartView

This is my chart view:

<telerik:RadCartesianChart x:Name="bpsChart" Margin="20,92,31,474">

<telerik:RadCartesianChart.Grid>

<telerik:CartesianChartGrid MajorXLineDashArray="5, 5" MajorYLineDashArray="5, 5" MajorLinesVisibility="None">

<telerik:CartesianChartGrid.MajorYLineStyle>

<Style TargetType="{x:Type Line}">

<Setter Property="Stroke" Value="Gray"/>

</Style>

</telerik:CartesianChartGrid.MajorYLineStyle>

<telerik:CartesianChartGrid.MajorXLineStyle>

<Style TargetType="{x:Type Line}">

<Setter Property="Stroke" Value="Gray"/>

</Style>

</telerik:CartesianChartGrid.MajorXLineStyle>

</telerik:CartesianChartGrid>

</telerik:RadCartesianChart.Grid>

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:CategoricalAxis ShowLabels="False" IsEnabled="False" TickThickness="0" LineThickness="0" >

</telerik:CategoricalAxis>

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis >

<telerik:LinearAxis ShowLabels="False" IsEnabled="False" TickThickness="0" LineThickness="0" />

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.Series>

<telerik:LineSeries CategoryBinding="Date" ValueBinding="Value" Stroke="LightSeaGreen"

ItemsSource="{Binding MyData, RelativeSource={RelativeSource AncestorType=Window}}"/>

</telerik:RadCartesianChart.Series>

</telerik:RadCartesianChart>

As you can see i am populate this with MyData which is my object the contains only only variable: double.

Now i have a list of several MyData objects and i want to create from each on them a stroke line on my ChartView.

What is the best option to do that ? (XAML or code behind)

I will glad for code example.

answered on 15 Jul 2015

Top users last month