Questions on UI for WPF Forum

1 answer

98 views

AutoGenerateColumns from ObservableCollection

I have a situation where I need to base the grid on an observable collection and I want to auto generate the columns based on the values of the Period property of the collection. For example, given the following code I want the column headers to display 2013, 2014, 2015, etc.

Imports System.Collections.ObjectModel

Class MainWindow

Private Sub MainWindow_Loaded(sender As Object, e As RoutedEventArgs) Handles Me.Loaded

Dim colSubjects As New ObservableCollection(Of Subject)

colSubjects.Add(New Subject With {.Period = 2013, .Subject = "English", .Average = 1.65})

colSubjects.Add(New Subject With {.Period = 2014, .Subject = "English", .Average = 18.6})

colSubjects.Add(New Subject With {.Period = 2015, .Subject = "English", .Average = 15.4})

colSubjects.Add(New Subject With {.Period = 2016, .Subject = "English", .Average = 8.2})

colSubjects.Add(New Subject With {.Period = 2017, .Subject = "English", .Average = 9.72})

colSubjects.Add(New Subject With {.Period = 2018, .Subject = "English", .Average = 8.55})

colSubjects.Add(New Subject With {.Period = 2013, .Subject = "Mathematics", .Average = 1.65})

colSubjects.Add(New Subject With {.Period = 2014, .Subject = "Mathematics", .Average = 18.6})

colSubjects.Add(New Subject With {.Period = 2015, .Subject = "Mathematics", .Average = 15.4})

colSubjects.Add(New Subject With {.Period = 2016, .Subject = "Mathematics", .Average = 8.2})

colSubjects.Add(New Subject With {.Period = 2017, .Subject = "Mathematics", .Average = 9.72})

colSubjects.Add(New Subject With {.Period = 2018, .Subject = "Mathematics", .Average = 8.55})

colSubjects.Add(New Subject With {.Period = 2013, .Subject = "Biology", .Average = 1.65})

colSubjects.Add(New Subject With {.Period = 2014, .Subject = "Biology", .Average = 18.6})

colSubjects.Add(New Subject With {.Period = 2015, .Subject = "Biology", .Average = 15.4})

colSubjects.Add(New Subject With {.Period = 2016, .Subject = "Biology", .Average = 8.2})

colSubjects.Add(New Subject With {.Period = 2017, .Subject = "Biology", .Average = 9.72})

colSubjects.Add(New Subject With {.Period = 2018, .Subject = "Biology", .Average = 8.55})

gvRigs.ItemsSource = colSubjects

End Sub

Private Class Subject

Public Subject As String

Public Period As Integer

Public Average As Single

End Class

Does anyone have any suggestions?

GridView

answered on 14 Dec 2013

3 answers

116 views

Cancel a connection based on the target type.

Hi,

I am new to Rad Controls/Diagram and would like some help if possible.

What I would like to do is cancel a connection between two items within the diagram based on the target's type.

Is this possible, if so, how would I go about it?

Thanks
Paul.

Diagram

answered on 14 Dec 2013

3 answers

178 views

Compute node position using a layout algorithm

I'm trying to add a shape from code adding an element to the graphsource property.
Everything works as expected: the new shape is added to the diagram at position (0, 0) unless I set a different value.

Is it possible to compute a "meaningful" position using a layout algorithm?
Of course I can add the shape and then trigger a diagram layout, but this will affect the position of every shape...

Diagram

answered on 14 Dec 2013

3 answers

289 views

RadDocument processing in Background processes

Hi Telerik,

I have a few questions regarding the usage of the RadDocument. According to my scenario I prepare different Documents in Designer (using RadRichTextBox) with Placeholders, which are implemented with the InlineUIContainers and child TextBlock element, and then this serialize document to HTML and retain in the Storage.
In the various Application background processes we use the prepared Doument "template" for generating HTML documents, by replacing the Placeholders with the real-time data.
To do it, we try to deserialize the RadDocument from the HTML and then use RadDocument DOM model for easier and safer Placeholder replacement operation. The only way we found to do it on Application Server is to use methods HtmlFormatProvider.Import, HtmlFormatProvider.Export. BUT they are not designed to be used in a such way as they expect to be run only in STA thread, so we got an exception:

InvalidOperationException with message "The calling thread must be STA, because many UI components require this."

Creating a dedicated STA thread for processing each documents works only under non-stressful conditions, and definitely failed on contrary with the confusing exception:

System.ComponentModel.Win32Exception (0x80004005): The operation completed successfully

Could you please suggest any way to overcome our problem, or suggest another approach for working with RadDocuments in background processes?

Thanks

RichTextBox

answered on 14 Dec 2013

1 answer

124 views

StretchAppointments = false not working as expected

HI,

I use this XMAL :

<telerik:TimelineViewDefinition

GroupTickLength="1m"

StretchAppointments="False"

StretchGroupHeaders="True"

MinTimeRulerExtent="1"/>

but the appointments will be stretched... (see attachment)
I use my own AppointmentItemContentTemplate with a TextBlock and a ProgressBar and set the MinAppointmentHeight="40"

How yould I fix this issue?

Thx

ScheduleView

answered on 14 Dec 2013

1 answer

91 views

RadRichTextBox with EmptyContent

Hi,

For my purposes, I am using RadRichTextBox instead of RadTextBox in order to take advantage of the spell check, where incorrect words get underlined.

I need to create something similar to an EmptyContent property in RadMaskedTextInput control. Can someone suggest how to such behavior to the RadRichTextBox?

Thank you in advance,

Michael

RichTextBox

answered on 13 Dec 2013

3 answers

243 views

Explicit Columns not generated with Asynchronous Binding

Hello,

It seems to have a bug with async binding and GridView.

Indeed when i create a grid view with synchronous binding like that :

    
            <telerik:RadGridView Margin="5,5,5,5" IsReadOnly="True" AutoGenerateColumns="False" ColumnsWidthMode="Fill" ShowColumnHeaders="True" ShowGroupPanel="True" ItemsSource="{Binding Path=AssetAnalysers}"> 
        
                                    <telerik:RadGridView.Columns> 
        
                                        <telerik:GridViewDataColumn x:Name="AlertTypeColumn"  HeaderText="Type" UniqueName="Analyser.Name" Width="100"/> 
        
                                        <telerik:GridViewDataColumn x:Name="AlertNameColumn"  HeaderText="Name" UniqueName="AnalysedObjectId"/> 
        
                                        <telerik:GridViewDataColumn x:Name="AlertLevelColumn" HeaderText="Level" UniqueName="Level" Width="100"/> 
        
                                        <telerik:GridViewDataColumn x:Name="AlertMessageColumn" HeaderText="Message" UniqueName="Message"/> 
        
                                    </telerik:RadGridView.Columns> 
        
                                </telerik:RadGridView>

Everything works well.

But when i try to make Asynchronous Binding (because the property AssetAnalysers take time to load) like that :

    
                                <telerik:RadGridView Margin="5,5,5,5" IsReadOnly="True" AutoGenerateColumns="False" ColumnsWidthMode="Fill" ShowColumnHeaders="True" ShowGroupPanel="True" ItemsSource="{Binding Path=AssetAnalysers, IsAsync=true}"> 
        
                                    <telerik:RadGridView.Columns> 
        
                                        <telerik:GridViewDataColumn x:Name="AlertTypeColumn"  HeaderText="Type" UniqueName="Analyser.Name" Width="100"/> 
        
                                        <telerik:GridViewDataColumn x:Name="AlertNameColumn"  HeaderText="Name" UniqueName="AnalysedObjectId"/> 
        
                                        <telerik:GridViewDataColumn x:Name="AlertLevelColumn" HeaderText="Level" UniqueName="Level" Width="100"/> 
        
                                        <telerik:GridViewDataColumn x:Name="AlertMessageColumn" HeaderText="Message" UniqueName="Message"/> 
        
                                    </telerik:RadGridView.Columns> 
        
                                </telerik:RadGridView>

At the first loading the four columns are well generated but when my property AssetAnalysers change (it's a INotifyChangedProperty), the binding seems correct but my columns are not generated. So, the GridView looks like empty (but i have rows).

Where is the problem ?

By the way what's the difference and the correct using of UniqueName, DataMemberBinding and DataMemberPath Properties when you have already a binding on ItemSource.

Thank you in advance for your answer.

G. Moelens

GridView

answered on 13 Dec 2013

3 answers

222 views

RadDateTimePicker does not completely display in machine culture

I have a WPF application that uses the Rad Controls for WPF. On one of the windows, there is a RadDateTimePicker:

<telerik:RadDateTimePicker FontSize="{x:Static res:Car.Common_DataEntryFontSize}"

FontWeight="Bold"

Grid.Column="1"

Grid.Row="2"

Height="35"

Margin="5,5,30,5"

Name="BeginDatePicker"

SelectedValue=

"{Binding Converter={StaticResource DateConverterForPicker}, Mode=TwoWay, Path=LocalBeginDate, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"

SelectionChanged="BeginDatePicker_SelectionChanged"

TabIndex="4"

Validation.ErrorTemplate="{StaticResource InputErrorTemplate}"

VerticalAlignment="Center"

Visibility="{Binding Path=CanModify, Converter={StaticResource BoolToVisibility}}" />

Everything works fine when the machine's culture is set to en-US. However, when I change my machine's culture to es-CL (Chile), the text "Enter Date" that appears in the control when it is empty does not get translated to Spanish. I still see "Enter Date".

When a date is displayed in the control, it's in the proper format for that region. How do I get the "Enter Date" to display in Spanish?

DateTimePicker

answered on 13 Dec 2013

1 answer

253 views

MVVM databinding not working

I have created my image property in my view model and can see the correct format provider is being used and populating my RadBitmap property but the binding does not work on the RadImageEditorUI control.

string extension = Path.GetExtension(FilePath).ToLower();

Stream stream = File.OpenRead(FilePath);

IImageFormatProvider formatProvider = ImageFormatProviderManager.GetFormatProviderByExtension(extension);

if (formatProvider != null)

{

ImagePath = formatProvider.Import(stream);

}

stream.Close();

XAML:

<telerik:RadImageEditorUI x:Name="ImageEditorUi" Image="{Binding ImagePath}" Style="{DynamicResource ImageEditorStyle1}">

Is binding working for this control? If so, please provide a MVVM example because the documentaiton for this has no binding examples.

ImageEditor

answered on 13 Dec 2013

6 answers

199 views

RadMaskedCurrencyInput backspace error

Hello,

Basically I am positioning the cursor in the box mid way though a number and then just holding down backspace and I get an IndexOutOfRangeException which says "Index was outside the bounds of the array.". I do have a screencast of me creating the error if you need that.

Here is the xaml:

<telerik:RadMaskedCurrencyInput Grid.Row="5" Grid.Column="3" Value="{ Binding BgsStepBase, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, ValidatesOnExceptions=True}" Style="{ StaticResource StandardRadMaskedCurrencyInput}" Validation.ErrorTemplate="{ StaticResource RadMaskedCurrencyInputErrorTemplate}" IsClearButtonVisible="True" IsReadOnly="{Binding IsBgsFieldEnabled, Converter={StaticResource NotConverter}}" FormatString="n0" />

The bound value is decimal? (nullable decimal).

The stack trace is:

at Telerik.Windows.Controls.RadMaskedInputBase.FindPreviousAvailablePositionNoMask() in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Input\MaskedInput\RadMaskedInputBase.NoMask.cs:line 209
at Telerik.Windows.Controls.RadMaskedCurrencyInput.HandleBackKeyNoMask() in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Input\MaskedInput\RadMaskedCurrencyInput.NoMask.cs:line 120
at Telerik.Windows.Controls.RadMaskedInputBase.HandleBackKey() in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Input\MaskedInput\RadMaskedInputBase.cs:line 2154
at Telerik.Windows.Controls.RadMaskedInputBase.OnKeyDown(Object sender, KeyEventArgs e) in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Input\MaskedInput\RadMaskedInputBase.cs:line 1701
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
at System.Windows.Input.InputManager.ProcessStagingArea()
at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawKeyboardActions actions, Int32 scanCode, Boolean isExtendedKey, Boolean isSystemKey, Int32 virtualKey)
at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)
at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)
at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at System.Windows.Interop.HwndSource.OnPreprocessMessageThunk(MSG& msg, Boolean& handled)
at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.TranslateAndDispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run()
at GH.WPF.App.App.Main() in C:\DevWork\Cubit2\Dev\Features\CommonPartEnhancementV1\GH.WPF.Cubit2\obj\x86\Debug\App.g.cs:line 0
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

Thanks,

Alex

MaskedInput (Numeric, DateTime, Text, Currency)

answered on 13 Dec 2013