Questions on UI for WPF Forum

1 answer

156 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

256 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

120 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

169 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

450 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

107 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>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

Can you tell me how to set the HeaderTemplate and his trigger?
I'm using WPF controls Q2 2010
Thanks

PanelBar

answered on 21 Jul 2010

9 answers

172 views

BringItemIntoView not working on Loaded Event

Hello,

I am trying to call the following code during the Loaded event and it does not work:

                    Carousel.CarouselItem item = (Carousel.CarouselItem)Scenes.Children[3];         
            Scenes.BringItemIntoView(item, true);         

I have similar code being called for the MouseDown event and it works fine. I know that I can call the .MoveBy method, but I'd like to move to a particular item in the list. Please not that I am using a CarouselPanel with custom UserControl as the child nodes.

Carousel

answered on 21 Jul 2010

2 answers

342 views

How to load an image to Gridview from .net Datatable

How can we load an image from SQL database (image stored as byte array) in image colum of gridview.
the grid binding is done through the .net datatable. Is it possible in this manner? if it is possible can i get a code sample...

thanx in advance...

expecting your valuable reply...

Regards
Abhijith

GridView

answered on 21 Jul 2010

4 answers

447 views

GridView -add new row

hi,

i tried to add a new row in a editing gridview,

when I click on the InsertRow, it becomes an edit row

and I can edit.

but when I go out the row, it disappears from the gridview,

it remains in the ChangeSet object, and after SubmitChanges it added to the data.

I want to see the new row immediately after insertion, not just after the SubmitChanges function.

i'd love to see an example where it works

thanks.

GridView

answered on 21 Jul 2010

1 answer

129 views

Problem with RadCarousel animation re-runs

Hello,

I am trying to adjust the RadCarousel in such a manner, that everytime the ItemsSource property of the carousel changes, it would run the animation that usually starts when items are added statically in XAML. I've tried several variations of MoveBy, PageLeft, PageLeft, etc. and calling BringDataItemIntoView, but i never get the desired result. Most of the time the items just appear or swirl around uncoherently.
Could there be some sort of workaround to make this work?

To wrap it up, i want the carousel to animate the items everytime i change the ItemsSource collection.
Any help would be greatly appreciated,
Thanks

Edit: My project is in WPF, of course :)

Carousel

answered on 21 Jul 2010