Questions on UI for WPF Forum

4 answers

281 views

RadTreeView : application theme not being applied

I'm attempting to change the SelectedUnfocused VisualState. I've extracted the style using Blend, made the correction for the Item Template Selector, and have set the Selected Unfocused Visual State to StoryBoard.TargetName="SelectionVisual". So focused/unfocused look the same.

I'm also setting the StyleManager.ApplicationTheme to Windows7Theme in the window constructor prior to the InitializeComponent() call.

Simple xaml. I would expect the highlights to be a blue-ish color. However, they are the orange-ish color.

However, if I do this, setting a simple property on the Item Container Style, the theme works.

I know the second case doesn't change the unfocused selection visual state, so how might I get theming to work when basing the Item Container Style on a complete style?

Thanks,
Kenny

TreeView

answered on 30 Dec 2016

1 answer

362 views

Fill RadGridView in window Loaded event

I've found very strange behavior.

A simple project contains the window with RadGridView. ItemsSource is binded to ViewModel.Rows where Rows is ObservableCollection.

I fill rows inside Window Loaded event.

RadGridView doen't updated if I don't use Rows.Clear() before Rows.Add().

Can you explain this?

Here is xaml:

01.<Window x:Class="TelerikWpfApp1.MainWindow"

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

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

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

05. xmlns:local="clr-namespace:TelerikWpfApp1"

06. Loaded="Window_Loaded">

07. <Window.Resources>

08. <local:ViewModel x:Key="vm"/>

09. </Window.Resources>

10. <Grid DataContext="{Binding Mode=OneWay, Source={StaticResource vm}}">

11. <telerik:RadGridView ItemsSource="{Binding Rows}" />

12. </Grid>

13.</Window>

And code behind:

01.using System.Collections.ObjectModel;

02.using System.Windows;

03.

04.namespace TelerikWpfApp1

05.{

06. public partial class MainWindow : Window

07. {

08. public MainWindow()

09. {

10. InitializeComponent();

11. }

12.

13. private void Window_Loaded(object sender, RoutedEventArgs e)

14. {

15. var rows = ((ViewModel)FindResource("vm")).Rows;

16. // to make it work uncomment the next row

17. //rows.Clear();

18. rows.Add(new Row { Name = "Name1", Column1 = "value1_1" });

19. rows.Add(new Row { Name = "Name2", Column1 = "value2_1" });

20. }

21. }

22.

23. class Row

24. {

25. public string Name { get; set; }

26. public string Column1 { get; set; }

27. }

28.

29. class ViewModel

30. {

31. public ObservableCollection<Row> Rows { get; } = new ObservableCollection<Row>();

32. }

33.}

GridView

answered on 29 Dec 2016

1 answer

83 views

PreviewClose not firing as expected

Hi,

I have a radform that is opened in the rowdetails of a radgrid that is in a radpane. If I change the value of a textbox, for example, and click on another control in the radform and then try to close pane, the previewclose event fires and I (after checking for changes) ask the user if they want to save changes and all is well. However, if instead of clicking on another control in the radform, I close the pane either by clicking on the X in the upper right hand corner of the pane or via code by setting the visibility property to hidden, I never get the previewclose event. Is this a bug? Is there a work around?

Thanks ... Ed

Docking

answered on 29 Dec 2016

4 answers

243 views

RadGridView inside RadComboBox

Hi,

I have requirement to display multiple columns under ComboBox with title and it should be also allow to sort RadGridView items. To achieve these requirement I decide to place a RadGridView inside RadComboBox.

I have almost achieved these requirement however there is only one issue. When I click on an item of RadGridView the RadComboBox is not closing down which is RadComboBox default behavior.

I tried to set IsDropDownOpen property of RadComboBox when user selects an item but it still not working.

To modify ControlTemplate of RadComboBox I referred to following blog.
http://www.nullskull.com/a/1359/wpf-datagrid-as-combobox-dropdown.aspx

In my case I have place RadGridView inside NonEditableTemplate. I don't know it's correct or not but yes it is working except the aforementioned issue. PFA image which displays the result so far I able to achieve.

Please help to resolve this issue.

ComboBox

answered on 29 Dec 2016

1 answer

286 views

CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression

I've recently upgraded my visual studio from 2010 to 2015, and since them, I'm getting a lot of warnings in my output window like:

System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='10705061'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='1587067'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='4309168'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='59694858'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='1914083'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='19024873'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='50812954'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='4881566'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='18343908'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='20169503'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='35212414'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='41054801'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='35526744'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='55199627'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='955278'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='42987539'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='55391087'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'
System.Windows.Freezable Warning: 1 : CanFreeze is returning false because a DependencyProperty on the Freezable has a value that is an expression; Freezable='System.Windows.Media.TranslateTransform'; Freezable.HashCode='9570975'; Freezable.Type='System.Windows.Media.TranslateTransform'; DP='X'; DpOwnerType='System.Windows.Media.TranslateTransform'

It happens every time a value in the gridview is changed.

It affects the performance of visual studio, since the output window is very busy.

Why it happens? It is something you are doing wrong and can be fixed?

Can I disable these warnings somehow?

Thanks.

GridView

answered on 29 Dec 2016

4 answers

206 views

Exporting to PDF, column width issue.

Hi,

I have an issue exporting a gridview to pdf when the gridview has a horizontal scrollbar and is wider than the container.

If I export without scrolling, the columns on the right hand side do not have their actual widths set properly, and are much less wide than the other columns. However, if I first scroll the scroll bar, and then scroll it back, when I export, the columns are the correct width.

Is there a way to programmatically do this? Is there a call on the gridview to auto size or best fit the columns or something like that? Do the columns actually have to be displayed on screen for the export to have the actual widths set?

GridView

answered on 29 Dec 2016

3 answers

259 views

Export to pdf/excel datetime column issue

Dear Telerik support,

My datetime columns arebehaving just the same as you can seein your article here

http://docs.telerik.com/devtools/wpf/controls/radgridview/export/how-to/export-datetime

Then i tried the given solution,but although the event is being called and the Format being attributed with the correct format, the solution doesn't not working for me. My datetime columns cells show as #########

Can you please check my code and see if i am missing something?

private void CustomGridview_ElementExportingToDocument(object sender, GridViewElementExportingToDocumentEventArgs e)

{

if (e.Element == ExportElement.Cell)

{

var cellExportingArgs = e as GridViewCellExportingEventArgs;

var parameters = cellExportingArgs.VisualParameters as GridViewDocumentVisualExportParameters;

if (cellExportingArgs.Column.GetType() == typeof(GridViewDataColumn))

{

if (((GridViewDataColumn)cellExportingArgs.Column).DataFormatString == "d")

{

parameters.Style = new CellSelectionStyle()

{

Format = new CellValueFormat(CultureInfo.CurrentCulture.DateTimeFormat.ShortDatePattern)

};

}

if (((GridViewDataColumn)cellExportingArgs.Column).DataFormatString == "g")

{

parameters.Style = new CellSelectionStyle()

{

Format = new CellValueFormat(CultureInfo.CurrentCulture.DateTimeFormat.ShortDatePattern + " " + CultureInfo.CurrentCulture.DateTimeFormat.ShortTimePattern)

};

}

Thank you

GridView

answered on 28 Dec 2016

9 answers

217 views

AnimationException when mouse over the RadTimeBar

Hi!

Please advice me on what I'm doing wrong, when using RadTimeBar.
When my cursor reaches over the TimeBar, I get the AnimationException:
Cannot animate the 'Cursor' property on a 'System.Windows.Controls.Border' using a 'System.Windows.Media.Animation.ObjectAnimationUsingKeyFrames'. For details see the inner exception.
The XAML code:

<telerik:RadTimeBar Height="130" Name="RadTimeBar1"

PeriodEnd="04/10/2014 00:00:00"

PeriodStart="03/31/2012 00:00:00"

SelectionEnd="04/06/2012 00:00:00"

SelectionStart="04/05/2012 00:00:00"

Width="Auto" Cursor="Hand" Content="From here you can chose the interval the below data will be shown" IsManipulationEnabled="True" UseLayoutRounding="True">

<telerik:RadTimeBar.Intervals>

<telerik:YearInterval />

<telerik:MonthInterval />

<telerik:WeekInterval />

<telerik:DayInterval />

</telerik:RadTimeBar.Intervals>

</telerik:RadTimeBar>

TimeBar

answered on 28 Dec 2016

1 answer

144 views

Multiple series in the same 3d chart

Hi,

I'm trying to show on the same chart different series types, I need to show Point3d and also Surface3d.

I have no idea why it's not working, actually it shows my surface3d as point3d.

this is the xaml code:

Thanks!

ChartView3D

answered on 28 Dec 2016

2 answers

478 views

Validation Combobox

I have a combobox like below and i need to have a required field validation on it. 

<

telerik:RadComboBox x:Name="combobox" SelectionChanged="combobox_SelectionChanged" IsTextSearchEnabled="True" Width="120"

telerik:TextSearch.TextPath="Kode" Margin="2,0,0,0" IsEditable="True" IsReadOnly="True" SelectedItem=

"{Binding Path=SelectedItem, Mode=TwoWay, UpdateSourceTrigger=Explicit, NotifyOnValidationError=true, ValidatesOnExceptions=true}"

TextSearchMode="Contains" CanAutocompleteSelectItems="True" >

<ItemsControl.ItemTemplate>

<DataTemplate>

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="50" />

<ColumnDefinition Width="300"/>

</Grid.ColumnDefinitions>

<TextBlock Text="{Binding Kode}" Grid.Column="0"/>

<TextBlock Text="{Binding Nederlandse_omschrijving}" Grid.Column="1"/>

<TextBlock Text="{Binding Franse_omschrijving}" Grid.Column="2"/>

</Grid>

</DataTemplate>

</ItemsControl.ItemTemplate

>



DummyComboBox.ItemsSource = DummyCodeList.Load()

The load event returns a list of Objects (List<DummyObject>)

I can't quite get the validation working. 

Any suggestions ?

ComboBox

answered on 28 Dec 2016