Questions on UI for WPF Forum

4 answers

539 views

Dear Sirs,

I have been working with RadVirtualGrid for WPF and I have found a problem trying to change columns' visibility. I need to do it both from code and from xaml.
I would appreciate any help with it.

I'm working with DataProvider, if this info helps in anyway.

Thanks in advance,

VirtualGrid

answered on 16 Nov 2017

3 answers

96 views

Make all the colors consistent

I manually set the color of a Line Series in xaml as Blue. Now in tooltip I also want the same color.

<telerik:LineSeries x:Name=ser1 ItemsSource="{Binding Data}"

CategoryBinding="Name" Stroke="Blue" ValueBinding="Value">

<telerik:LineSeries.TooltipTemplate>

<DataTemplate>

<SatckPanel>

<ItemsControls ItemsSource="{Binding}">

<ItemsControl.Template>

<DataTemplate>

<Ellipse Width="12" Height="12" Fill="Blue">

....

</DataTemplate>

</ItemsControl.Template>

<ItemsControls>

</StackPanel>

</DataTemplate>

</telerik:LineSeries.TooltipTemplate>

</telerik:LineSeries>

Now my question if we don't use hard code how can we make the colors same?

ChartView

answered on 16 Nov 2017

1 answer

254 views

Tabs on a RadPaneGroup

I've got a TabStripPanel on a RadPaneGroup where sometimes the tabs are only the width of the label and other times they stretch to fill the entirety of the width of the pane. The application is using a pretty dated Telerik version 2014.3.2117.45

Any tips about why this sort of behavior could be manifesting? Thanks.

Docking

answered on 16 Nov 2017

1 answer

188 views

Customizing and setting connectors of a Node

I am using a ObservableGraphSourceBase with a fairly standard Link model and a HierarchicalNodeViewModel as bases for my Diagram to display.

Within my Diagram declaration in the XAML I am successfully using ShapeStyleSelector property to set the style of my Nodes as they are dropped or read into the diagram.

I am looking for a way to remove and or add Connectors to the Nodes either from the Style via a Setter of some sort or somehow grammatically with a MVVM friendly method.

I have tried from within the HierarchicalNodeView model but it does not have access to the resulting shape it seems. Also the ObservableGraphSourceBase does not seem to have access to the resulting RadDiagramShape which houses the Connectors list.

Please help.

Diagram

answered on 16 Nov 2017

2 answers

321 views

Unable to programmatically focus

Hi,
I'm using 2017.3.913.45 and I've been trying to focus a NumericUpDown-Control when the user changes the current Tab of a RadTabControl.

So I've got a RadTabControl:

<telerik:RadTabControl ... SelectionChanged="TabControl_SelectionChanged" ...>

..

<telerik:RadTabItem Name="MyTab">

..

<telerik:RadNumericUpDown Name="MyNumericUpDown" ..></telerik:RadNumericUpDown> ..

</telerik:RadTabItem>

..

</telerik:RadTabControl>

And a TabControl_SelectionChanged Method:

private void TabControl_SelectionChanged(object sender, RadSelectionChangedEventArgs e)

{

try

{

if(e.AddedItems[0] == MyTab)

{

MyNumericUpDown.Focus();

Keyboard.Focus(MyNumericUpDown);

}

catch

{

System.Diagnostics.Debugger.Break();

}

I initially only tried with MyNumericUpDown.Focus() which did not work, a colleague asked me to add the Keyboard.Focus(MyNumericUpDown) call, but that also does not work.

What's the workflow here?

NumericUpDown

answered on 16 Nov 2017

1 answer

155 views

Disable renaming the spreadsheet

Hi,

How to disable renaming the Telerik Spreadsheet?

Here is the XAML and we are using Telerik 2017.2.614.45.NoXaml

<telerik:RadSpreadsheet
                        x:Name="sprSpecification"
                        Width="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Grid}}, Path=ActualWidth}"
                        Height="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Grid}}, Path=ActualHeight}"
                        ScrollViewer.HorizontalScrollBarVisibility="Auto"
                        ScrollViewer.VerticalScrollBarVisibility="Auto"
                        Workbook="{Binding Workbook, Mode=TwoWay}" />

Thanks,
Sri

Spreadsheet

answered on 16 Nov 2017

1 answer

346 views

Dynamically change palette by value at run time.

I use ChartView and BarSeries. I want different bar has different color. I defined six colors. So I defined the palette as below. However it is hard coded. Now I want to change the color by the value at the run time. Say less than 100 use color 1, 100~200 use color 2 etc. Not sure how?

<telerik:ChartPaletette x:key="myPalette">

<telerik:ChartPalette.GlobalEntries>

<telerik:PaletteEntry Fill="#FE24C532" />

<telerik:PaletteEntry Fill="#FE54C5A1" />

<telerik:PaletteEntry Fill="#FE2AC5D5" />

<telerik:PaletteEntry Fill="#FE00CF4A" />

<telerik:PaletteEntry Fill="#FE54A531" />

<telerik:PaletteEntry Fill="#FE2CC5C1" />

</telerik:ChartPalette.GlobalEntries>

</telerik:ChartPaletette x:key="myPalette">

ChartView

answered on 16 Nov 2017

3 answers

183 views

Windows XP Data Binding crashes application

I just got these Problem on Windows XP.

If any binded value get changed, the PropertyChanged event will throw an exception.

XAML-Code:

01.<telerik:RadWindow x:Class="TelerikWpfApp.TelerikScenario"

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. Header="TelerikScenario" Height="300" Width="300">

06. <Grid>

07. <Grid.ColumnDefinitions>

08. <ColumnDefinition />

09. <ColumnDefinition />

10. </Grid.ColumnDefinitions>

11.

12. <Label Content="{Binding Text, UpdateSourceTrigger=PropertyChanged}" Grid.Column="0" />

13.

14. <Button Content="CHANGE VALUE" Click="Button_Click" Grid.Column="1" Height="150" Margin="5" />

15. </Grid>

16.</telerik:RadWindow>

Code Behind:

using System;

using System.ComponentModel;

using System.Windows;

namespace TelerikWpfApp

{

/// <summary>

/// Interaction logic for TelerikScenario.xaml

/// </summary>

public partial class TelerikScenario : INotifyPropertyChanged

{

#region Private Fields

private string text = "test";

#endregion Private Fields

#region Public Events

public event PropertyChangedEventHandler PropertyChanged;

#endregion Public Events

#region Protected Methods

protected void SetProperty<T>(ref T storage, T value, string property = null)

{

if (Object.Equals(storage, value)) return;

storage = value;

PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(property));

}

#endregion Protected Methods

#region Public Properties

public string Text

{

get { return text; }

set { SetProperty(ref text, value); }

}

#endregion Public Properties

#region Public Constructors

public TelerikScenario()

{

InitializeComponent();

DataContext = this;

}

#endregion Public Constructors

#region Private Methods

private void Button_Click(object sender, RoutedEventArgs e)

{

try

{

Text = "123";

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

#endregion Private Methods

}

Exception:

Cannot change AllowsTransparency after a Window has been shown or
WindowInteropHelper.EnsureHandle has been called.

at System.Windows.Window.CoerceAllowsTransparency(DependencyObject d, Object value)
at System.Windows.DependencyObject.ProcessCoerceValue(DependencyProperty dp,
PropertyMetadata metadata, EntryIndex& entryIndex, Int32& targetIndex,
EffectiveValueEntry& newEntry, EffectiveValueEntry& oldEntry, Object& oldValue,
Object baseValue, Object controlValue, CoerceValueCallback coerceValueCallback,
Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, Boolean
skipBaseValueChecks)
at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex,
DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry,
EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean
coerceWithCurrentValue, OperationType operationType)
at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp)
at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean
isASubPropertyChange)
at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean
isASubPropertyChange)
at System.Windows.Data.BindingExpression.ScheduleTransfer(Boolean
isASubPropertyChange)
at MS.Internal.Data.ClrBindingWorker.NewValueAvailable(Boolean
dependencySourcesChanged, Boolean initialValue, Boolean isASubPropertyChange)
at MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32 k,
ICollectionView collectionView, Object newValue, Boolean isASubPropertyChange)
at MS.Internal.Data.ClrBindingWorker.OnSourcePropertyChanged(Object o, String
propName)
at
MS.Internal.Data.PropertyPathWorker.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type
managerType, Object sender, EventArgs e)
at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs
args, ListenerList list)
at System.ComponentModel.PropertyChangedEventManager.OnPropertyChanged(Object
sender, PropertyChangedEventArgs args)
at TelerikWpfApp.TelerikScenario.SetProperty[T](T& storage, T value, String
property) in C:\Users\BL\Documents\Visual Studio
2017\Projects\TelerikWpfApp\TelerikWpfApp\TelerikScenario.xaml.cs:line 39
at TelerikWpfApp.TelerikScenario.set_Text(String value) in
C:\Users\BL\Documents\Visual Studio
2017\Projects\TelerikWpfApp\TelerikWpfApp\TelerikScenario.xaml.cs:line 47
at TelerikWpfApp.TelerikScenario.Button_Click(Object sender, RoutedEventArgs e)
in C:\Users\BL\Documents\Visual Studio
2017\Projects\TelerikWpfApp\TelerikWpfApp\TelerikScenario.xaml.cs:line 66

Window

answered on 15 Nov 2017

1 answer

254 views

Styling buttons

I'm trying to change the default rad button style

However, when looking for RadButtonStyle I find it's defined in:

Styles.xaml
Telerik.xaml
Telerik.Windows.Controls.Diagrams.Extensions.xaml
Telerik.Windows.Controls.FileDialogs.xaml
Telerik.Windows.Controls.Input.xaml
Telerik.Windows.Controls.Navigation.xaml
Telerik.Windows.Controls.RibbonView.xaml
Telerik.Windows.Controls.RichTextBoxUI.xaml
Telerik.Windows.Controls.xaml

Why is it so, and which one should I change?

Buttons

answered on 15 Nov 2017

1 answer

139 views

WPF RadGridView and BindingOperations.EnableCollectionSynchronization

I need to know if WPF RadGridView works with BindingOperations.EnableCollectionSynchronization. If not what solution you are suggesting to iterate and update my collection from worker thread?

General Discussions

answered on 15 Nov 2017