Questions on UI for WPF Forum

1 answer

193 views

show or hide DataFormDataField inside a NewItemTemplate

Hi,

I have a Gender DataFormComboBoxField in the RadDataForm's NewItemTemplate. How do I show and hide another DataFormDataField on the same template(NewItemTemplate) based on the Gender type (male/female)?

Thanks!

DataForm

answered on 24 May 2019

1 answer

123 views

The PasswordBox clears it's entry on a Windows session reconnect

Steps to reproduce:

I have built a wpf application with 2 telerik controls: a WatermarkTextBox and a PasswordBox.

1. In a Windows session, I launch my wpf application

2. Enter text in both controls

3. Leave the application up and running and disconnect from the Windows session

4. I reconnect to (log back in) the Windows session, the PasswordBox field gets cleared.

[In a different scenario, when having multiple WatermarkTextBox, some of the WatermarkTextBox get cleared when reconnecting to the session]

Any idea what is going? I did some research and could not find anything helpful. Thanks.

PasswordBox

answered on 23 May 2019

1 answer

305 views

Convert to Telerik WPF Application option is missing

Hello!

I recently purchased Telerik UI For WPF. Installation worked fine, dll's are installed in the GAC etc.

However, I can't convert my existing project into a Telerik WPF Application. The option is missing from the Telerik menu in VS for 1 of my projects, and is not present in the Context menu in the Solution explorer either.

My VS solution exists of 10 or so projects. For 9 of those projects, the Convert to Telerik WPF application is there, but for the main application which I want to convert the option is missing as I described.

Any ideas?

Tia,

Chris

Installer and Visual Studio Extensions

answered on 23 May 2019

2 answers

344 views

RadGridView, custom filter date with dynamic columns

Hi, i'm trying to implement a custom filter as your example, but in a dynamic columns grid, when i filter i receive this error:

'The binary operator GreaterThanOrEqual is not defined for the types 'System.Object' and 'System.DateTime'.'

On the event

private void OnFilter(object sender, RoutedEventArgs e)

{

this.fromFilter.Value = this.FromDate;

this.toFilter.Value = this.ToDate;

if (!this.column.DataControl.FilterDescriptors.Contains(this.compositeFilter))

{

this.column.DataControl.FilterDescriptors.Add(this.compositeFilter);

}

this.IsActive = true;

}

i set the dynamic column type like this:

e.Column.ColumnGroupName = "Commercial";

e.Column.Header = new TextBlock { Text = "Data inserimento", TextAlignment = TextAlignment.Center, TextWrapping = TextWrapping.Wrap, Width = 75, LayoutTransform = new RotateTransform { Angle = -90 } };

((GridViewDataColumn)(e.Column)).DataFormatString = "{0:dd-MMM-yy}";

((GridViewDataColumn)(e.Column)).DataType = typeof(DateTime?);

((GridViewDataColumn)(e.Column)).FilterMemberType = typeof(DateTime?);

e.Column.FilteringControl = new ucDateFilter { FromDate = DateTime.Now, ToDate =DateTime.Now.AddDays(5)};

GridView

answered on 23 May 2019

9 answers

564 views

Unhandled Exception: Telerik.Windows.Automation.Peers.GridViewGroupPanelAutomationPeer.GetChildrenCore()

Hello,

The application I am working on is throwing the following unhandled exception whenever I attempt to run my automation against it. This issue started occurring when we upgraded our Telerik libraries from Library v2012.3.1129.40 to v2012.1.326.402. We are using HP QTP to automate our testing. This is the first time I have experienced this error, there were no issues prior to the Telerik lib upgrade.

System.NullReferenceException was unhandled by user code

Message=Object reference not set to an instance of an object.

Source=Telerik.Windows.Controls.GridView

StackTrace:

at Telerik.Windows.Automation.Peers.GridViewGroupPanelAutomationPeer.GetChildrenCore() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Automation\GridViewGroupPanelAutomationPeer.cs:line 44

at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()

at System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit)

at System.Windows.Automation.Peers.AutomationPeer.UpdateChildren()

at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()

at System.Windows.Automation.Peers.AutomationPeer.UpdatePeer(Object arg)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

at MS.Internal.Threading.ExceptionFilterHelper

I have located some backwards compatibility documentation on your website http://www.telerik.com/help/wpf/radgridview-backward-compatibility.html.

It explains that the “Telerik.Windows.Controls.GridView.Automation” class is now obsolete and has been moved into “Telerik.Windows.Automation.Peers…” class. Could this have something to do with my issue? Any help with this would be much appreciated.

GridView

answered on 23 May 2019

1 answer

203 views

Button is not working on popup inside RadGridView CellEditTemplate

<telerik:RadGridView ... NewRowPosition="Top">

<telerik:RadGridView.Columns>

<telerik:GridViewToggleRowDetailsColumn .../>

<telerik:GridViewDataColumn ...>

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

...

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

<telerik:GridViewDataColumn.CellEditTemplate>

<DataTemplate>

<TextBox ... >

<TextBox.Triggers>

<EventTrigger RoutedEvent="TextBox.GotFocus">

<EventTrigger.Actions>

<BeginStoryboard>

<Storyboard>

<BooleanAnimationUsingKeyFrames

Storyboard.TargetName="TextBoxPopup"

Storyboard.TargetProperty="IsOpen">

<DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="True" />

</BooleanAnimationUsingKeyFrames>

</Storyboard>

</BeginStoryboard>

</EventTrigger.Actions>

</EventTrigger>

</TextBox.Triggers>

</TextBox>

<Popup x:Name="TextBoxPopup" ...>

...

<Button Content="Test Button"

Command=

"{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:RadGridView}},Path=DataContext.SaveCommand}"

Click="Button_Click"/>

<Popup.Triggers>

<EventTrigger RoutedEvent="Popup.LostFocus">

<BeginStoryboard>

<Storyboard>

<BooleanAnimationUsingKeyFrames

Storyboard.TargetName="TextBoxPopup"

Storyboard.TargetProperty="IsOpen">

<DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="False" />

</BooleanAnimationUsingKeyFrames>

</Storyboard>

</BeginStoryboard>

</EventTrigger>

</Popup.Triggers>

</Popup>

</DataTemplate>

</telerik:GridViewDataColumn.CellEditTemplate>

</telerik:GridViewDataColumn>

</telerik:RadGridView.Columns>

<telerik:RadGridView.RowDetailsTemplate>

...

</telerik:RadGridView.RowDetailsTemplate>

</telerik:RadGridView>

Hi,

In xaml, I have a button inside a popup that is placed on edit cell template (CellEditTemplate). The button's Click event and the Command are not fired when I click the button. I have tried placing the popup with the button inside view cell template (CellTemplate) and the button by itself (no popup) inside edit template. They are both working. The xaml structure is attached. When the button on the popup is clicked, I want to close the popup and proceed to commit the change on the cell. Is this possible to do?

Thank you in advance for your help.

GridView

answered on 22 May 2019

1 answer

89 views

Autohide Collums when resize the application

Hi,

i was wondering if its possible to Autohide Collums in the GridView when i resize the application. For example: i resize the width of the application from full sreen to half so from 8 collums only 4 are now visible.

Best regards,

Thomas

GridView

answered on 21 May 2019

8 answers

330 views

Empty row validation tooltip

Hello,

I use a RadGridView and validate my data by implementing the INotifyDataErrorInfo interface.
It works well, but when there is a validation error, the tooltip of the row header is empty.
Could you please tell me how to fill the tooltip of the row header with the validation error messages?

Example: https://file.io/rEm4Fd (link valid until Tuesday 16th of April 2019)

GridView

answered on 21 May 2019

1 answer

101 views

Hello,

Given <telerik:GridViewDataColumn DataMemberBinding="{Binding Number, StringFormat=C}" />..
If I use GetValueForItem, I get the formatted value (e.g. $1.00)..
Is there a method so I can get "1" instead?

Thank you,

Jan

GridView

answered on 21 May 2019

6 answers

318 views

Automation Crash

Using Windows Narrator (or our automated testing tool) our app crashes with the following stack trace:

at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection)

at System.Collections.Generic.List`1.AddRange(IEnumerable`1 collection)

at Telerik.Windows.Controls.RadTabControlAutomationPeer.GetChildrenCore()

at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()

at System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit)

at System.Windows.Automation.Peers.ItemsControlAutomationPeer.UpdateChildren()

at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()

at System.Windows.ContextLayoutManager.fireAutomationEvents()

This didnt happen with the Telerik trial dll's (version 2012.2.0725.40) but does happen since we received our licensed dll's (versions 2012.2.0912.40 and 2012.2.0929.40)

I would have raised this as a support ticket but my Telerik account isnt linked to our license at present.

Thanks

TabControl

answered on 20 May 2019