Questions on UI for WPF Forum

1 answer

109 views

Not able to add new item with a filtered QueryableEntityCollectionView as source

Hi,

I've got a DataForm with a QueryableEntityCollectionView as ItemSource.
The QueryableEntityCollectionView is filtered, the DataForm as a custom CommandProvider.

An exception occurs when DataForm.AddNewItem() is beeing hit. "An unhandled exception of type 'System.NullReferenceException' occurred in Telerik.Windows.Data.dll" this is not happening when there is no filter active. Any idea why this is happening and how to have a filter active and add a new item?

Cheers! Eric

DataForm

answered on 30 Dec 2016

2 answers

81 views

KeepTogether in Telerik.Windows.Documents.Model

It happened that we use Telerik.Windows.Documents.Model namespace for report generation. And I need "say" section (or paragraph) that it shouldn't contain page breaks. But as I understand Telerik.Windows.Documents.Model classes don't support keepTogeher property. Does workaround exist? Or am I wrong?

General Discussions

answered on 30 Dec 2016

3 answers

795 views

RadGridview Cell font color not changing

I have this style defined in the page resource

I assign the style for a GridViewDataColumn as follows

<telerik:GridViewDataColumn DataMemberBinding="{Binding MsgStatus}" Header="Msg Status" UniqueName="MsgStatus"
IsReadOnly="True" IsVisible="{Binding Data.GridColumns.MsgStatusIsVisible, Source={StaticResource proxy} , Mode=TwoWay}"
DisplayIndex="{Binding Data.GridColumns.MsgStatusOrder, Source={StaticResource proxy} , Mode=TwoWay}"
SortMemberPath="MsgStatus" CellStyle="{StaticResource MsgStatusStyle}" >
</telerik:GridViewDataColumn>

But the foreground doesnt change to Red. If I change the property in the style definition to background that changes to red upon rendering.

Any idea why froeground color doesnt change ?

GridView

answered on 30 Dec 2016

1 answer

89 views

Select item whose itemtemplate contains RadNumericUpDown

I have a RadListBox with an ItemTemplate that contains a read-only RadNumericUpDown. When I click on the RadNumericUpDown, the list item is not selected. How can I make that happen?

ListBox

answered on 30 Dec 2016

4 answers

285 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

366 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

85 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

245 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

294 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

207 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