Questions on UI for WPF Forum

4 answers

366 views

Hi!

I couldn't find any information about selecting which camera I want to use in RadWebCam. Any sample? Or is it not possible?

Also there should be a way to save and load the settings of a camera.Any hints?

Thanks

WebCam

answered on 14 Aug 2019

2 answers

164 views

Performance

Why is performance so good for this control? I'm loading 23,000 search items into an ObservableCollection, and search response is almost instantaneous.

This may seem like an odd question, but in preparing to work with this control, I found a few online complaints about performance and a suggestion to trigger virtualization by setting the MaxHeight property of the inner ListBox, as follows:

I found that this wasn't necessary, and as I hate mysteries, I'm wondering if Telerik has taken care of all performance issues (say by automatically triggering virtualization) since the time of the complaints.

If this isn't the case, and I can expect to run into performance problems with a larger number of search items, are there any standard techniques to address such eventual problems?

Wayne

AutoCompleteBox

answered on 14 Aug 2019

3 answers

276 views

BarSeries & PointSeries Setter

Hi.

I wonder two thing.

1. I want to set BarWidth.

In case of PointSeries, < Setter Property="PointSize" Value=.../>

But I don't look for that.

2. I want to set Color of BarSeries & PointSeries.

The color is 'Stroke' in LineSeries.

------------------------------------------------------------------------------------------

I want that setting is available property.

Chart

answered on 14 Aug 2019

3 answers

1.5K+ views

Get cell value

What are all the ways to programmatically get cell value?

GridView

answered on 13 Aug 2019

3 answers

401 views

Exclude certain RadGridView columns's info from being persisted

Hello,

I'm trying to exclude some (but not all) RadGridView columns' information from being persisted using PersistenceManager.

For example, in the below grid, how would I exclude column Info's properties from being persisted based on the column's Header name (assume I've defined CustomPropertyProvider for the grid to persist properties like Width, Header, etc.)?

<telerik:RadGridView x:Name="TestGrid"
telerik:PersistenceManager.StorageId="TestGrid"
AutoGenerateColumns="False">
<telerik:RadGridView.Columns>
<telerik:GridViewDataColumn Header="Info" DataMemberBinding="{Binding Info}"/>
<telerik:GridViewDataColumn Header="Data" DataMemberBinding="{Binding Data}"/>
</telerik:RadGridView.Columns>
</telerik:RadGridView>

I could use SerializationOptions but I'm not sure what I'd put in the "Expression" field to exclude column "Info" (see below):
<telerik:PersistenceManager.SerializationOptions>
<telerik:SerializationMetadataCollection>
<telerik:PropertyNameMetadata Condition="Except" Expression="??" SearchType="PropertyName" />
</telerik:SerializationMetadataCollection>
</telerik:PersistenceManager.SerializationOptions>

PersistenceFramework

answered on 13 Aug 2019

1 answer

89 views

Paste from Excel row with more columns that existing in the Grid

When trying to paste a row from an Excel Sheet with 11 columns, the PastingCellClipboardContent event is only launched 10 times.

Is there any way to force the event to be launched as many times as copied range existing columns (11) ?

Regards

AVG Solutions

GridView

answered on 13 Aug 2019

3 answers

1.5K+ views

Setting the selected items in a multiple selection combobox

I have a radcombobox with AllowMultipleSelection set to true.

When loading a window I want to set the selected items in that combo box from values obtained from a database. But I can't seem to see how the values can be set if I set the ItemsSource to a string[]

As an example

string[] items = new string[] {"1", "2" "3", "4"};
OptionCombo.ItemsSource = items;

Then I want to set "2" and "4" to selected.

Thanks

ComboBox

answered on 12 Aug 2019

1 answer

158 views

Issue with label of bar series

From the picture below you can see that the percent sign is cropped. but it isn't on the rest

ClipToPlotArea="False"

Also how to achieve the chart in the second image. (The age pyramide with the age in the middle)

Thanks

ChartView

answered on 12 Aug 2019

2 answers

409 views

RadFixedDocument rotate single page

Hi,
The rotation property of the page object causes me problems.
I want to rotate a specific page in the RadFixedDocument, so i index the right page and rotate it 90 degree and after that i call OnPropertyChanged to update the PdfDocument property.
But when the page was rotated(in the debug mode the value has been changed) the radpdfviewer doesn't display the rotation.

Where could the error be located?
Many thanks in advance for youre suggestions.

MainWindow.xaml.cs:

01.using System;

02.using System.IO;

03.using System.Linq;

04.using System.Windows;

05.using System.Windows.Input;

06.using Telerik.Windows.Documents.Fixed;

07.using Telerik.Windows.Documents.Fixed.FormatProviders;

08.using Telerik.Windows.Documents.Fixed.FormatProviders.Pdf;

09.using Telerik.Windows.Documents.Fixed.Model;

10.using Telerik.Windows.Documents.UI;

11.using Rotation = Telerik.Windows.Documents.Fixed.Model.Data.Rotation;

12.

13.namespace TelerikWpfApp1

14.{

15. /// <summary>

16. /// Interaction logic for MainWindow.xaml

17. /// </summary>

18. public partial class MainWindow : Window

19. {

20. private PdfViewModel _pdfViewModel;

21. public MainWindow()

22. {

23. InitializeComponent();

24. _pdfViewModel = new PdfViewModel();

25. DataContext = _pdfViewModel;

26. }

27.

28. private void RotateSpecificPage(object sender, RoutedEventArgs e)

29. {

30. _pdfViewModel.RotateSpecificPage();

31. }

32.

33. private void DeleteSpecificPage(object sender, RoutedEventArgs e)

34. {

35. _pdfViewModel.DeleteSpecificPage();

36. }

37. }

38.}

MainWindow.xaml:

01.<Window

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

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

04. xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

05. xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

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

07. xmlns:converters="clr-namespace:Telerik.Windows.Documents.Converters;assembly=Telerik.Windows.Controls.FixedDocumentViewers"

08. xmlns:telerikWpfApp1="clr-namespace:TelerikWpfApp1"

09. mc:Ignorable="d"

10. x:Class="TelerikWpfApp1.MainWindow"

11. Title="MainWindow" Height="Auto" Width="Auto">

12. <Grid>

13. <Grid>

14. <Grid.RowDefinitions>

15. <RowDefinition Height="Auto" />

16. <RowDefinition Height="Auto" />

17. <RowDefinition Height="*" />

18. </Grid.RowDefinitions>

19. <Button Grid.Row="0" Click="RotateSpecificPage">RotatePage</Button>

20. <Button Grid.Row="1" Click="DeleteSpecificPage">DeletePage</Button>

21. <telerik:RadPdfViewer Grid.Row="2" x:Name="PdfViewer" Document="{Binding Path=PdfDocument, UpdateSourceTrigger=PropertyChanged, Mode=OneWay}"/>

22. </Grid>

23. </Grid>

24.</Window>

PdfViewModel.cs:

01.using System;

02.using System.Collections.Generic;

03.using System.ComponentModel;

04.using System.IO;

05.using System.Linq;

06.using System.Runtime.CompilerServices;

07.using System.Text;

08.using System.Threading.Tasks;

09.using System.Windows;

10.using System.Windows.Input;

11.using Telerik.Windows.Documents.Fixed.FormatProviders;

12.using Telerik.Windows.Documents.Fixed.FormatProviders.Pdf;

13.using Telerik.Windows.Documents.Fixed.Model;

14.using Telerik.Windows.Documents.Fixed.Model.Data;

15.using TelerikWpfApp1.Annotations;

16.

17.namespace TelerikWpfApp1

18.{

19. public class PdfViewModel : INotifyPropertyChanged

20. {

21. private string _path = @"test.pdf";

22. private RadFixedDocument _pdfDocument;

23. private const int PageNumber = 0;

24.

25. public PdfViewModel()

26. {

27. PdfDocument = ReadPdf(_pathOne);

28. }

29. public RadFixedDocument PdfDocument

30. {

31. get => _pdfDocument;

32. set

33. {

34. if (!Equals(value, null))

35. {

36. _pdfDocument = value;

37. OnPropertyChanged();

38. }

39. }

40. }

41.

42. private RadFixedDocument ReadPdf(string path)

43. {

44. using (var stream = File.OpenRead(path))

45. {

46. return new PdfFormatProvider(stream, FormatProviderSettings.ReadAllAtOnce).Import();

47. }

48. }

49.

50. public void RotateSpecificPage()

51. {

52. Console.WriteLine(@"Page has been rotated");

53. if (!Equals(PdfDocument, null))

54. {

55. PdfDocument.Pages[PageNumber].Rotation = Rotation.Rotate90;

56. OnPropertyChanged(nameof(PdfDocument));

57. }

58. }

59.

60. public void DeleteSpecificPage()

61. {

62. Console.WriteLine(@"Page has been deleted");

63. if (!Equals(PdfDocument, null) && PdfDocument.Pages.Count > 1)

64. {

65. PdfDocument.Pages.RemoveAt(PageNumber);

66. OnPropertyChanged(nameof(PdfDocument));

67. }

68. }

69.

70. public event PropertyChangedEventHandler PropertyChanged;

71.

72. [NotifyPropertyChangedInvocator]

73. protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)

74. {

75. PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

76. }

77. }

78.}

PDFViewer

answered on 09 Aug 2019

3 answers

360 views

Whole numbers only?

I am trying to use the RadSlider to allow the user to choose the number of Millimeters on an interface, I don't need fractions at all, but I can't figure out how to get the RadSlider to snap to whole numbers when they drag the slider. If anyone has an example of how to do this it would be much appreciated.

thanks!

Slider

answered on 08 Aug 2019