Questions on UI for WPF Forum

1 answer

74 views

Enable scrolling when the curser is outside the boundaries of the control

Hi

when using the mouse wheel, It is perfectly possible to change the content when the mouse cursor is over the control.
but, Is it possible to enable mouse wheel scrolling when the mouse cursor is not directly over the numericupdown control? assuming the control did not lose focus of course.

thanks.

NumericUpDown

answered on 26 Sep 2013

1 answer

644 views

[Solved] RadComboBox doesn't updates Text when renaming item

I use the RadComboBox from Telerik in a WPF project.

My Problem is that the selected text is not updated when the selected item changes its value. So when the ViewModel changes the `Name` property of the `SelectedItem`, I can not see this in the RadComboBox.

Note: The `SelectedItem` implements `INotifyPropertyChanged` and is calling the event.

Full source code:

public class MainViewModel : INotifyPropertyChanged

{

private readonly List<Item> _items = new List<Item>();

private Item _selectedItem;

public MainViewModel()

{

// http://www.random.org/strings/?num=10&len=10&upperalpha=on&loweralpha=on&unique=on&format=plain&rnd=new

_items.Add(new Item { Name = "Eg Zomh JywS" });

_items.Add(new Item { Name = "Ua Qvp Lavwz" });

_items.Add(new Item { Name = "Nee Lzx Rdaq" });

_items.Add(new Item { Name = "Um Ztgi Yvsg" });

_items.Add(new Item { Name = "tma Oppt fzd" });

_items.Add(new Item { Name = "Du Zofcy Fbs" });

_items.Add(new Item { Name = "bc Ey Ppvvcp" });

_items.Add(new Item { Name = "Mv RSIZtf WE" });

_items.Add(new Item { Name = "BFb YYZ PHwC" });

_items.Add(new Item { Name = "YSW LQ DXxHu" });

}

public event PropertyChangedEventHandler PropertyChanged;

public IEnumerable<Item> Items { get { return _items; } }

public Item SelectedItem

{

get { return _selectedItem; }

set

{

_selectedItem = value;

OnPropertyChanged("SelectedItem");

OnPropertyChanged("SelectedItemName");

}

public string SelectedItemName

{

get { return _selectedItem != null ? _selectedItem.Name : null; }

set

{

if (_selectedItem != null)

{

_selectedItem.Name = value;

OnPropertyChanged("SelectedItemName");

}

protected virtual void OnPropertyChanged(string propertyName)

{

var handler = PropertyChanged;

if (handler != null)

{

handler(this, new PropertyChangedEventArgs(propertyName));

}

public class Item : INotifyPropertyChanged

{

private string _name;

public event PropertyChangedEventHandler PropertyChanged;

public string Name

{

get { return _name; }

set

{

_name = value;

OnPropertyChanged("Name");

}

protected virtual void OnPropertyChanged(string propertyName)

{

var handler = PropertyChanged;

if (handler != null)

{

handler(this, new PropertyChangedEventArgs(propertyName));

}

<Window x:Class="TelerikRadComboBoxProblem.MainWindow"

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

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

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

Title="MainWindow" Height="150" Width="300">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto" />

<RowDefinition Height="*" />

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="Auto" />

<ColumnDefinition Width="*" />

</Grid.ColumnDefinitions>

<TextBlock Text="Search: " VerticalAlignment="Center" />

<telerik:RadComboBox Grid.Row="0" Grid.Column="1"

ItemsSource="{Binding Items, Mode=OneWay}"

SelectedItem="{Binding SelectedItem, Mode=TwoWay}"

StaysOpenOnEdit="True"

DisplayMemberPath="Name"

CanAutocompleteSelectItems="False"

IsEditable="True"

IsReadOnly="False"

OpenDropDownOnFocus="True"

IsFilteringEnabled="True"

TextSearchMode="Contains">

</telerik:RadComboBox>

<TextBlock Grid.Row="1" Grid.Column="0" Text="Rename: " VerticalAlignment="Center" />

<TextBox Grid.Row="1" Grid.Column="1" Text="{Binding SelectedItemName, Mode=TwoWay}" />

</Grid>

</Window>

public partial class MainWindow

{

public MainWindow()

{

InitializeComponent();

DataContext = new MainViewModel();

}

ComboBox

answered on 26 Sep 2013

1 answer

65 views

WPF Grid Upa nd Down Arrow Grid Selection

In the teleric grid when i press the up and down arrow the selection is not working it's selecting alternative rows.

GridView

answered on 26 Sep 2013

5 answers

246 views

Unhandled EntityCommandExecutionException

Hello Telerik,

I am using version 2013.2.724.40 and I have the following problem. I’m working on an MVVM WPF application. It is a multi-thread application which draws data form a postgres db, displays the data and writes them in to a SQL EXPRESS DB. In one (two) View(s) the data can be displayed and manipulate in a RadGridView this is directly bound to a QueryableEntityCollectionView<>, I’m using the Microsoft Entity Framework.

Occasionally and absolutely not reproducible, but nonetheless too often I get an unhandled EntityCommandExecutionException, mostly when the user push a button to change the View. The Inner Exception is "A severe error occurred on the current command. The results, if any, should be discarded.". If this occurs in the Debugger and when I have a look at the stack, it looks like in the attached picture.

I have the suspicion that comes from the QueryableEntityCollectionView<> bound to the RadGridView, but I have no idea how to prevent this and/or on which place I should enclose some code with a try catch block.
As you can see in the stack none of my functions or classes are involved.

May be someone have an idea.

Regards Uwe

GridView

answered on 26 Sep 2013

2 answers

151 views

[Solved] drilldown option for horizontal bar chart

Hi,

Is it possible to have a drill down option for horizontal bar chart in WPF ?

If yes please provide me the sample code.

Thanks,
Ramya

Chart

answered on 26 Sep 2013

7 answers

1.2K+ views

Pin main window to taskbar

Hi,

I picked up the following code from the forum that enables my application to be placed in the task bar with the Icon that i referenced. This works well but if I pin the app to the taskbar the icon reverts back to the icon that normally shows in the microsoft main window. How can I get my icon to persit when being pinned to the taskbar, Also, while I am asking for help on the icon, how do I get the icon to also show in the window header.

Thanks
Rich

public void ShowInTaskbar(RadWindow control, string title)
{
control.Show();
var window = control.ParentOfType<Window>();
window.ShowInTaskbar = true;
window.Title = title;
var uri = new Uri("pack://application:,,,/Images/myapp.png");
window.Icon = BitmapFrame.Create(uri);
}

Window

answered on 25 Sep 2013

2 answers

164 views

[Solved] InsertSectionBreakCommand

The following xaml does not seem to work:

<telerik:RadRibbonButton telerik:ScreenTip.Description="Start a new section at the current position."
			 LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/PageBreak.png"
			 telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding InsertSectionBreakCommand}"
			 Size="Large"
			 Text="Section Break"
			 telerik:ScreenTip.Title="Section Break" />

There seems to be such a command as InsertSectionBreakCommand, but it does no seem to be implemented or something

RichTextBox

answered on 25 Sep 2013

3 answers

270 views

Multiple X-Axis LineSeries Issue

I have been trying to create a chart that has two x-axis lineseries. They both have the same Category and Value binding, but to 2 different items sources. Whenever I load the data into the data sources the graph are in the chart plots them side by side.

I am 99% sure this is because my category datasource doesn't have the same categories in each. I have a time element stored in milliseconds and a value element. Now the time element for the first record in the first dataset is "0.03" but in the second dataset it's "0.028". Second record is "0.07" and "0.66" respectively.

This is for a data logging analysis app, so I'm essentially trying to combine two sets of data with slightly differing millisecond capture points but overlayed on the same chart area.

So given that I have differing "categories" I'm presuming that I'd need to look at the linearaxis, but when I do I get no chart data. I'm trying to get something similar to the 2nd image on this Telerik post: http://blogs.telerik.com/winformsteam/posts/13-04-04/top-3-features-you'll-love-about-radchartview-q1'13

If I create a chart like this you can see what I mean:

<tel:RadCartesianChart >

<tel:RadCartesianChart.HorizontalAxis>

<tel:CategoricalAxis/>

</tel:RadCartesianChart.HorizontalAxis>

<tel:RadCartesianChart.VerticalAxis>

<tel:LinearAxis/>

</tel:RadCartesianChart.VerticalAxis>

<tel:RadCartesianChart.Series>

<tel:LineSeries Stroke="Orange" StrokeThickness="2">

<tel:LineSeries.DataPoints>

<tel:CategoricalDataPoint Category="1" Value="10"/>

<tel:CategoricalDataPoint Category="2" Value="30"/>