Questions on UI for WPF Forum

1 answer

89 views

We have recently bought the licence of the Telerik controls and I am trying to use the TreeListView. Is there a way to use a template selector to bind different collection of data?

Thanks
Kiran

TreeListView

answered on 22 Jul 2010

10 answers

417 views

Text Formatting

I am trying to use the NumericUpDown but I need to format the displayed value so as to not show anything after the decimal, i.e. I want whole numbers only. I cannot seem to find a text format property, so how can I achieve this?

Thanks,

blair

NumericUpDown

answered on 22 Jul 2010

1 answer

36 views

Date cannot be selected issue in build 2010.2.0714.35?

I used DatePicker control (version 2010.1.422.35) in my project and everything worked fine. And yesterday I updated the dlls to version 2010.2.0714.35, and then I found the datepicker cannot pick up a date.

Is this a know issue? or besides updating the dlls and the reference path in my projects, there is something else I need to update to make datepicker work correctly?

Thanks,
Yang Lu

DatePicker

answered on 22 Jul 2010

2 answers

151 views

Hide a floating pane

I have a RadPane set to floatingdocked. I do not wish to display this pane when the application loads.
I wish to display this only when certain event is fired.
I tried to set the visibility to hidden on SplitContainer as well as RadPanegroup but it is still visible

Docking

answered on 22 Jul 2010

1 answer

149 views

Setting GridViewCell background and HorizontalAlignment

I'm trying to set both background an HorizontalAlignment on GridViewCells of a GridViewDataColumn at run time as follows:

Binding backgroundBinding = new Binding("Item.Format[" + column.UniqueName + "].Background");
Binding horizontalAlignmentBinding = new Binding("Item.Format[" + column.UniqueName + "].HorizontalAlignment");

Style cellStyle = new Style(typeof(GridViewCell));
cellStyle.Setters.Add(new Setter(GridViewCell.BackgroundProperty, backgroundBinding));
cellStyle.Setters.Add(new Setter(GridViewCell.HorizontalAlignmentProperty, horizontalAlignmentBinding));
column.CellStyle = cellStyle

It works; the point is that background color do not fill whole cell area but only a around cell content (see attached picture).
Same issue for VerticalAlignment.

Sincerely
Ivano

GridView

answered on 22 Jul 2010

9 answers

254 views

Rectangle in Gridview and Coded UI Test

Hello -
We have a column in a radgridview that is using a rectangle in the data template (WPF 3.5 app - Moving to .NET 4.0 is not a option right now.). This works fine normally, but running a VS 2010 Coded UI Test against the app when this grid is displayed causes our application to crash due to a null reference exception being thrown. Please advise.

Note: This causes our application to crash during QTP automated UI tests (what we normally use for automated UI testing) as well, so our automated testing in on hold until a fix is found.

By the way, UISpy doesn't like this either, but Snoop doesn't seem to have a problem with it.
Thanks.

GridView Column code:

<

telerik:GridViewColumn Header="" IsSortable="False" IsFilterable="False" TextAlignment="Center">

<telerik:GridViewColumn.CellTemplate>

<Rectangle Height="18" Width="18"

HorizontalAlignment="Center" VerticalAlignment="Center"

Fill="AliceBlue"/>

</DataTemplate>

</telerik:GridViewColumn.CellTemplate>

</telerik:GridViewColumn>

Exception detail:

Event Type: Error
Event Source: RATS 3.0
Event Category: None
Event ID: 100
Date:  7/8/2010
Time:  11:26:50 AM
User:  N/A
Computer:
Description:
Timestamp: 08-Jul-2010 3:26:50 PM
Message: HandlingInstanceID: c590513b-d517-41bf-88b5-b1304b1daab7
An exception of type 'System.NullReferenceException' occurred and was caught.
-----------------------------------------------------------------------------
07/08/2010 11:26:50
Type : System.NullReferenceException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Message : Object reference not set to an instance of an object.
Source : PresentationCore
Help link :
Data : System.Collections.ListDictionaryInternal
TargetSite : Void EnsureChildren()
Stack Trace :    at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateChildren()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.ContextLayoutManager.fireAutomationEvents()
   at System.Windows.ContextLayoutManager.UpdateLayout()
   at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
   at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()
   at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.AnimatedRenderMessageHandler(Object resizedCompositionTarget)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
   at System.Threading.ExecutionContext.runTryCode(Object userData)
   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
   at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.Run()
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at System.Windows.Application.Run()
   at WpfShell.App.Main() in C:\IS\TFSProd\CSS.Underwriting\Main\Rats3\Client\WpfShell\obj\Debug\App.g.cs:line 0

GridView

answered on 22 Jul 2010

1 answer

112 views

Drag Drop in Gridviews inside Popup

im having a popup which contains two grid. when i placed code in separate xaml it works perfect. but when i placed the inside a popup. my popup info Content appear quit away from where my mouse pointer is. u can see attached image.

so how to position my info Contents under my mouse?

DragAndDrop

answered on 21 Jul 2010

1 answer

166 views

How to use both autoexpend on drag AND loadondemand?

Hello,
I'm having issues getting the treeview's functionalities to work when in LoadOnDemand , notably drag and drop and AutoExpand,
1) AutoExpand on drag doesn't work , if i remove the load on demand it works , however load on demand itself seems to work just fine
2) Droping doesn't seem to load the node either , when i drop on an unloaded node it opens with only the node i have droped instead of it's actual content.
Is this scenario supported, if so what am i doing wrong , else any tips on how to implement it? I am using the latest Q2 version and WPF 4 / VS 2010.
Thanks!

Full code (couldn't find how to properly paste code on forums , any tips most welcome):

XAML :

<

Window x:Class="RadControlsWpfApp1.MainWindow"

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

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

xmlns:Tree="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"

Title="MainWindow" Height="350" Width="525">

<Grid>

<Tree:RadTreeView ItemsSource="{Binding Items}"

IsLoadOnDemandEnabled="True"

LoadOnDemand="RadTreeView_LoadOnDemand"

IsDragDropEnabled="True">

<Tree:RadTreeView.ItemTemplate>

</HierarchicalDataTemplate>

</Tree:RadTreeView.ItemTemplate>

</Tree:RadTreeView>

</Grid>

</

Window>

Code behind:

using

System;

using

System.Collections.Generic;

using

System.Windows;

using

System.Windows.Navigation;

using

Telerik.Windows.Controls;

using

System.ComponentModel;

namespace

RadControlsWpfApp1

{

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

this.DataContext = this;

Items =

new List<object>(){

new Item{Id = 1 , Name = "1"},

new Item{Id = 2 , Name = "2"},

new Item{Id = 3 , Name = "3"},

new Item{Id = 4 , Name = "4"},

new Item{Id = 5 , Name = "5"}

};

}

public List<object> Items { get; set; }

private void RadTreeView_LoadOnDemand(object sender, Telerik.Windows.RadRoutedEventArgs e)

{

RadTreeViewItem item = e.OriginalSource as RadTreeViewItem;

var Current = item.Item as Item;

Current.Children =

new List<object>(){

new Item{Id = 1 , Name = "1"},

new Item{Id = 2 , Name = "2"},

new Item{Id = 3 , Name = "3"},

new Item{Id = 4 , Name = "4"},

new Item{Id = 5 , Name = "5"}

};

item.IsLoadingOnDemand =

false;

}

public class Item : INotifyPropertyChanged

{

public int Id { get; set; }

public string Name { get; set; }

List<object> children = new List<object>();

public List<object> Children

{

get

{

return children;

}

set

{

children =

value;

PropertyChange(

"Children");

}

public event PropertyChangedEventHandler PropertyChanged = (a, b) => { };

public void PropertyChange(string propertyName)

{

this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));

}

TreeView

answered on 21 Jul 2010

1 answer

433 views

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element

If I put a

<telerik:RadTransitionControl />

element on the windows I am starting to get these kind of errors:

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=Foreground.Color; DataItem=null; target element is 'DropShadowEffect' (HashCode=31421563); target property is 'Color' (type 'Color')

Note that transition control is empty (no content) and the error originates from a style I have somewhere defined. I assume transition control does something with styles.
Not also that this isn't a stopping error but rather an annoyance in output window.

TransitionControl

answered on 21 Jul 2010

2 answers

104 views

PanelBarItem HeaderStyle Trigger

Hi, I'm using Xaml to design my PanelBar. I want to set defined properties to my PanelBarItems when they are expanded and when they are selected. I found some code on an other thread but it doesn't seem to be compatible with the PanelBar. Here is the code:

<Style TargetType="{x:Type telerik:RadPanelBarItem}">

<Setter Property="HeaderTemplate">

<Setter.Value>

<ControlTemplate TargetType="{x:Type telerik:RadPanelBarItem}">

<ControlTemplate.Triggers>

<Trigger Property="IsSelected" Value="True">

<Setter Property="FontSize" Value="25" />

</Trigger>

<Trigger Property="IsExpanded" Value="True">

<Setter Property="FontWeight" Value="Italic" />

</Trigger>

</ControlTemplate.Triggers>