Questions on UI for WPF Forum

1 answer

196 views

hello,

while running some CodedUI Tests on WPF Aplication who use Rad Gridview (2012 Q1)
Usual CodedUI Test (click on grid, click On Cells, Press Down...)
using VS2010
Windows XP.

suddenly i got this Exception from the Application itself (not the test!)

System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generics.List'1.Enumerator.MoveNextRare()
at System.Collections.Generics.List'1.Enumerator.MoveNext()
at
Telerik.Windows.Controls.GridView.Automation.GridViewDataControlAutomationPeer.GeneratePeersForDataItems(List'1 newPeerList, AutomationPeerStorage'2 oldCachedPeers)
at
Telerik.Windows.Controls.GridView.Automation.GridViewDataControlAutomationPeer.GetItemPeers()
at
Telerik.Windows.Controls.GridView.Automation.GridViewVirtualizingPanelAutomationPeer.GetChildrenCore()
at Telerik.Windows.Automation.Peers.AutomationPeer.EnsureChildren()
at Telerik.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit)
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.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, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object Args, Int32 numArgs, Delegate catchHandler)

can someone help..?
thanks in advance.

GridView

answered on 10 Jul 2012

6 answers

175 views

General Question about WPF demo application

Hey,
Just a quick question - in the WPF demo application, when You download it and it loads for the first time it displays a line loading and massive numbers going up. Is that done with one of Your tools provided ? and If yes which is it ?
Regards,
(Premium Collection user) Neil

ProgressBar

answered on 10 Jul 2012

1 answer

86 views

Diagram Save/Load Binding Bug :(

Hy,

I've got the following Problem.
If i Save the Diagram to String and Load the string back into the same Diagram, my binding doesn't work anymore.
Bug inside the Diagram Framework or OSI Layer 9 (20 cm in the front of the monitor) ?

XAML:

<telerik:RadDiagramShape x:Class="SPARE_BPMS_Framework.Shapes.General.ProcessShape"

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

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

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

mc:Ignorable="d" Content="{Binding}"

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

d:DesignHeight="300" d:DesignWidth="300">

<telerik:RadDiagramShape.Resources>

<DataTemplate x:Key="editTemplate">

<StackPanel Orientation="Horizontal">

<TextBox Height="24" Text="{Binding Name}" />

</StackPanel>

</DataTemplate>

<DataTemplate x:Key="template">

<WrapPanel Orientation="Vertical">

<TextBlock Text="{Binding Name}" />

<TextBlock Text="{Binding ChildProcessName}" />

</WrapPanel>

</DataTemplate>

</telerik:RadDiagramShape.Resources>

</telerik:RadDiagramShape>

Code Behinde

public partial class ProcessShape : RadDiagramShape

{

public ProcessItem Model { get; set; }

public string Name { get; set; }

public ProcessShape()

{

InitializeComponent();

Model = new ProcessItem();

this.EditTemplate = (DataTemplate)this.FindResource("editTemplate");

this.ContentTemplate = (DataTemplate)this.FindResource("template");

this.DataContext = Model;

this.MouseDoubleClick += new MouseButtonEventHandler(Model.shape_MouseDoubleClick);

}

public void Update()

{

this.EditTemplate = (DataTemplate)this.FindResource("editTemplate");

this.ContentTemplate = (DataTemplate)this.FindResource("template");

}

Method who call the Reload and Load

string temp = diagram.Save();

diagram.Clear();

diagram.Load(temp);

Greetings

Alfred

Diagram

answered on 10 Jul 2012

1 answer

124 views

What timezone are you in?

Hello,

I'm just curious, I always post questions between 10-5 Pacific Time (UTC -7) and they seem to be answered when I come back in the morning. What time zone are you guys posting from?

Eric

General Discussions

answered on 10 Jul 2012

2 answers

134 views

PreserveFocus() in GridViewDataControl.OnItemsChanged

Hi, support team,

We've upgraded to 2012.2.0607.40 recently and I found one chagne in the RadGridView that impacts user experience.
Basically we have input boxes (hosted inside the grid) to allow user to enter something to filter the grid. The problem is every time user entered something in the text box, GridViewDataControl.OnItemsChanged will be executed, and the grid found that it has the focus (because we host the text box in the grid) so it call a PreserveFocus internally to set the focus to itself and actually steal the focus from the text box inside the grid.

Right now my work around is to override the OnItemsChanged to set the focus back but it's still having problem sometimes.

     protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
     {
       var inputElement = Keyboard.FocusedElement;
       base.OnItemsChanged(e);
       if (inputElement is TextBox)
       {
         Dispatcher.BeginInvoke(() => Keyboard.Focus(inputElement), DispatcherPriority.Input);
       }
     }

Can you look into fix the problem?

Thanks
Jason

GridView

answered on 10 Jul 2012

2 answers

95 views

Best RadControls to......

Hi,

I would like to ask the experts and the general community users telerik his advice on the correct selection of controls for a scenario like this:

An application (WPF Web Application) that at runtime, the creation of multiple items (a user control perhaps) but these items can be classified into 1 of 5 types ..... ie item 1 can be type A, type B item 2, etc ..... forming a list of selectable items grouping by type....

Furthermore, these elements must be contained in a manner that allows the user to drag and drop on another control or container.

The variety of Telerik controls is impressive and in some tests I made several mistakes .... or several ways to do wrong .... in any case, what kind of controls may be used for a similar scenario .... I permitted through the functionality that is required?

In advance, thank you all.

General Discussions

answered on 09 Jul 2012

0 answers

143 views

Undefined CLR namespace error

Hi All,

I can successfully compile the installed WPF demos included in the commerical version. But I cannot preview the XAML views. I get the error below. I only have Q1 2012 installed for all the Telerik Products on this this machine, I uninstalled all others.

Error 82 Undefined CLR namespace. The 'clr-namespace' URI refers to a namespace 'Telerik.Windows.Examples.RibbonView' that is not included in the assembly. C:\Program Files (x86)\Telerik\RadControls for WPF Q1 2012\Demos\Examples\RibbonView\WPF\RibbonWindow\Example.xaml 4 15 RibbonView.WPF

Can someone point out what might be happening here?

Thanks,

Reid

General Discussions

asked on 09 Jul 2012

3 answers

162 views

How to change GridView column header background

I exported the style in Blend but don't see a way to change the Column header background. Is this possible to do?
Rod

GridView

answered on 09 Jul 2012

2 answers

142 views

GridViewComboBoxColumn strange trouble

Hi, we have very strange GridViewComboBoxColumn's behaviour. Code is very simple, but we have different result when execute our program on different PC. Normal behaviour should be next:
1) select any item in 3rd row combobox;
2) choose second cell in this row.
3) selected item in 1st column should be selected!!!

But on 50% PC we don't have this, i.e. selected item pull down everywhere. We lose selected item on LostFocus. In debug mode we saw, that debugger comes to GET of Employee.Name property after ComboBox selection changed (on the PC with wrong behaviour). And debugger comes to SET of this property on the PC with normal behaviour. It's hard to believe and to explain. What's wrong with this control?

BUT !!! We don't have any trouble if use common template with ComboBox (i.e. without using GridViewComboBoxColumn) - ex.code3.

Ex.code1: Main Window XAML:

<telerik:RadGridView Name="dGrid" AutoGenerateColumns="False" Height="188" VerticalAlignment="Top">

<telerik:RadGridView.Columns>

<telerik:GridViewComboBoxColumn

ItemsSourceBinding ="{Binding Path=Names, Mode=TwoWay}"

DataMemberBinding="{Binding Path=Name, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

UniqueName="ClmNames"

>

</telerik:GridViewComboBoxColumn>

<telerik:GridViewDataColumn

DataMemberBinding="{Binding Path=Name, Mode=TwoWay}">

</telerik:GridViewDataColumn>

</telerik:RadGridView.Columns>

Ex.code2: Main window C#:

public MainWindow()

{

InitializeComponent();

_employees = new List<Employee>(){

new Employee {Names = new List<string>{"Ann", "Nata"}, Name = "Ann"},

new Employee {Names = new List<string>{"Elise", "Ivan", "Марк"}, Name = "Ivan"},

new Employee {Names = new List<string>{"Elise", "Ivan", "Марк"}},

};

dGrid.ItemsSource = _employees;

}

Ex.code3: Working template XAML:

<telerik:GridViewDataColumn.CellTemplate> 

<DataTemplate> 

<ComboBox ItemsSource="{Binding Path=ImprovementList}" DisplayMemberPath="refimprovement.name_full" 

SelectedItem="{Binding Path=RecalcManualItem.cfaccimprovementlist, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 

SelectionChanged="ComboBox_SelectionChanged" /> 

</DataTemplate> 

</telerik:GridViewDataColumn.CellTemplate>

GridView

answered on 09 Jul 2012

3 answers

439 views

Latitude and Longitude of visible area.

Hi,

Is it possible to get the longitude and latitude of the visible area on screen?

The scenario is the user has zoomed into a city, I want to be able to get the upper left lat and long, the lower right lat and long and then based on those values go to the database and get all the branches in that area.

Simplistic code example.

public void ItemsRequest(object sender, ItemsRequestEventArgs e)

{

var dataContext = page.DataContext as MappingViewModel;

if (dataContext == null)

return;

//var minZoom = e.MinZoom;

var upperLeft = e.UpperLeft;

var lowerRight = e.LowerRight;

var branches = _repository.GetBranches(upperLeft.Latitude, upperLeft.Longitude, lowerRight.Latitude, lowerRight.Longitude);

dataContext.SetBranches(branches, e);

}

The problem is that the e.upperLeft and e.LowerRight latitude and longitude values don't seem to represent what is in the visible area.

Sorry for my lack of understanding, this is the first time I have developed for maps so this may be a really stupid question! :-)

Regards,
Mark

Map

answered on 09 Jul 2012