Questions on UI for WPF Forum

6 answers

143 views

Randomly getting exception in RadTreeView.InheritTreeProperties

Hi,

I'm using WPF controls version 2011.2.712.35.
Randomly getting following exception below.

If there is a workaround to this exception please let me know.

Thanks,
Ruben

at Telerik.Windows.Controls.RadTreeView.InheritTreeProperties(RadTreeViewItem treeViewItem) in

c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Controls\Navigation\TreeView\RadTreeView.CommonItemContainer.cs:line 600

at Telerik.Windows.Controls.RadTreeView.PrepareContainerForDescendant(DependencyObject element, Object item, ItemsControl owner)

in

c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Controls\Navigation\TreeView\RadTreeView.CommonItemContainer.cs:line 152

at Telerik.Windows.Controls.RadTreeViewItem.PrepareContainerForItemOverride(DependencyObject element, Object item) in c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Controls\Navigation\TreeView\RadTreeViewItem.cs:line 1513

at System.Windows.Controls.ItemsControl.MS.Internal.Controls.IGeneratorHost.PrepareItemContainer(DependencyObject container, Object item)

at System.Windows.Controls.ItemContainerGenerator.System.Windows.Controls.Primitives.IItemContainerGenerator.PrepareItemContainer(DependencyObject container)

at Telerik.Windows.Controls.TreeView.TreeViewPanel.InsertContainer(Int32 childIndex, UIElement container, Boolean isRecycled)

in

c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Controls\Navigation\TreeView\Virtualization\TreeViewPanel.cs:line 2257

at Telerik.Windows.Controls.TreeView.TreeViewPanel.AddContainerFromGenerator(Int32 childIndex, UIElement child, Boolean newlyRealized)

in

c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Controls\Navigation\TreeView\Virtualization\TreeViewPanel.cs:line 2309

at Telerik.Windows.Controls.TreeView.TreeViewPanel.MeasureOverride(Size constraint) in

c:\TB\101\WPF_Scrum\Release_WPF\Sources\Development\Controls\Navigation\TreeView\Virtualization\TreeViewPanel.cs:line 1454

at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

at System.Windows.UIElement.Measure(Size availableSize)

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.RenderMessageHandler(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)

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, Boolean ignoreSyncCtx)

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, Int32 numArgs)

at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)

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()

TreeView

answered on 15 Nov 2011

0 answers

163 views

How do you Add Mouse Events to Child Grid in CodeBehind

So, I figured out how to create the Child grid int he code behind, but now I need to have a click event on the Child grid rows. With the following code I get a "Handler type is mismatched" on the order.AddHandler line.

Any help on how to get this to work?

Thanks,

Doug

private void rgvPatientImages_DataLoading(object sender, Telerik.Windows.Controls.GridView.GridViewDataLoadingEventArgs e)

{

GridViewDataControl dataControl = (GridViewDataControl)sender;

if (dataControl.ParentRow != null)

{

dataControl.BorderThickness = new Thickness(0, 1, 0, 1);

dataControl.GridLinesVisibility = GridLinesVisibility.None;

dataControl.CanUserFreezeColumns = false;

dataControl.ShowGroupPanel = false;

dataControl.AutoGenerateColumns = false;

dataControl.ChildTableDefinitions.Clear();

dataControl.IsReadOnly = true;

dataControl.SelectionMode = SelectionMode.Single;

dataControl.SelectionUnit = GridViewSelectionUnit.Cell;

GridViewDataColumn customerId = new GridViewDataColumn();

customerId.Header = "Customer Id";

customerId.DataMemberBinding = new Binding("CustId");

customerId.DataType = typeof(int);

dataControl.Columns.Add(customerId);

GridViewDataColumn order = new GridViewDataColumn();

order.UniqueName = "OrderIdId";

order.Header = "Order Id";

order.DataType = typeof(int);

order.AddHandler(MouseLeftButtonDownEvent, new EventHandler<MouseButtonEventArgs> (orderId_MouseLeftButtonUp));

dataControl.Columns.Add(order);

}

private void orderId_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

{

object ID = ((Button)sender).CommandParameter;

CustomerOrder NewWindow = new CustomerOrder();

NewWindow.orderId = Convert.ToInt32(sender.ToString());

NewWindow.Show();

this.Close();

}

GridView

asked on 15 Nov 2011

10 answers

196 views

Datatemplate in Carousel Binding to RadRichTextBox Question

Hello,

I have a Problem with the Databinding to a RichTextBox that is located in a Datatemplate for a RadCarousel.

Here my Xaml:

<DataTemplate x:Key="customItemTemplate">

<Border Background="LightSlateGray" Padding="10">

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="*" />

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

<RowDefinition Height="600" />

</Grid.RowDefinitions>

<telerik:RadRichTextBox Name="radRichTextBox"

IsReadOnly="True"

HorizontalAlignment="Stretch"

VerticalAlignment="Stretch" Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="5">

<telerik:RadDocument LayoutMode="Paged">

<telerik:Section PageMargin="10, 10, 10, 10">

<telerik:Paragraph TextAlignment="Left">

<telerik:Span Text="{Binding Redner}" />

<telerik:Span FontWeight="Bold" Text=" RadRichTextBox!" />

</telerik:Paragraph>

<telerik:Paragraph>

<telerik:Span FontWeight="Bold" Text="RadRichTextBox" />

<telerik:Span Text=

" is a control that is able to display and edit rich-text content including  formatted  text arranged in pages, paragraphs, spans (runs) etc."

/>

</telerik:Paragraph>

<telerik:Table LayoutMode="AutoFit">

<telerik:TableRow>

<telerik:TableCell>

<telerik:Paragraph>

<telerik:Span Text="Cell 1" />

</telerik:Paragraph>

</telerik:TableCell>

<telerik:TableCell>

<telerik:Paragraph>

<telerik:Span Text="Cell 2" />

</telerik:Paragraph>

</telerik:TableCell>

</telerik:TableRow>

<telerik:TableRow>

<telerik:TableCell ColumnSpan="2">

<telerik:Paragraph>

<telerik:Span Text="Cell 3" />

</telerik:Paragraph>

</telerik:TableCell>

</telerik:TableRow>

</telerik:Table>

</telerik:Section>

</telerik:RadDocument>

</telerik:RadRichTextBox>

</Grid>

</Border>

</DataTemplate>

</Grid.Resources>

The first Problem is the access to the line with <telerik:Span Text="{Binding Redner}"

/>

How can I make a Binding from Code-behind to the Controls in the Datatemplate?

The second Question is: How can i Bind the Width from the Carousel-Item to the Variable Monitor-Resolution? I need a Width with max 90% from the Carousel.

Sorry for my bad English. I hope you now what i mean.

Thank You

Carousel

answered on 15 Nov 2011

1 answer

101 views

Hide Expand-Button

Hi,

i have a GridView with Hierarchy.

1.How can i hide the expand Button.
2.How can i expand with the SelectChanged-Event. And i need the information from the Selected Row.

In your Forum i found a older Solution, but it wont work with the actual Telerik-Build.

Thank you

GridView

answered on 15 Nov 2011

0 answers

215 views

PreviewLostKeyboardFocus gets fired even when the focus enters the editable combobox.

Hello Telerik team,

When a user enters a value in the editable textbox of the RadCombobox that doesn't matches any of the available list of items then though the selected value is set to null , the text remains in the editable textbox even on lost focus of the RadCombobox.

I have a requirement where I have to perform a validation when the user tabs out of the editable RadCombobox or tries to click on a different control. The validation is to verify if the text entered by the user is available in the list of items and if not then alert the user of this and open the dropdown.

I implemented this validation on PreviewLostKeyboardFocus event as given below. But the problem is this event gets fired even when the focus enters the RadCombobox.

After the Ok button of the alert is clicked and then when I try to click of the dropdown's button, this event gets fired again and so the alert.

Why does this event fires when the focus enters the radcombobox.

Could you please guide me.

private void radCmbCustomer_PreviewLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)

{

if ((sender as RadComboBox) != null

&& ((sender as RadComboBox).ItemsSource as Customer[]) != null)

{

Customer[] larrCustomer = ((sender as RadComboBox).ItemsSource as Customer[]);

/*Check if the code entered by the user*/

TextBox txtEditableTextBoxRadCmbCustomer = radCmbCustomer.Template.FindName("PART_EditableTextBox", radCmbCustomer) as TextBox;

if (txtEditableTextBoxRadCmbCustomer != null)

{

string lstrCustomer = txtEditableTextBoxRadCmbCustomer.Text;

if (lstrCustomer != null && !lstrCustomer.Trim().Equals(string.Empty))

{

var lvarCustomerRecordsMatched = from lobjCustomer in larrCustomer

where lobjCustomer.CustomerName.ToUpper() == lstrCustomer.ToUpper()

select lobjCustomer;

if (lvarCustomerRecordsMatched != null && lvarCustomerRecordsMatched.ToList<Customer>().Count <= 0)

{

MessageBox.Show("The text you entered isn't an item in the list. \nSelect an item from the list, or enter text that matches one of the listed items.", "Alert");

radCmbCustomer.IsDropDownOpen = true;

txtEditableTextBoxRadCmbCustomer.Focus();

e.Handled = true;

return;

}

Thanks,
Regards,
Mausami

ComboBox

asked on 15 Nov 2011

0 answers

142 views

setting background color for special slot

Hi,

I am using special slots to differentiate working hours and non working hours in scheduleview. For non working hours I change the background color just to indicate that the slot is not available. My problem is if two slots with the same time-span are added in special slot list then I get the slot background color very darker. For example, I add the slots which are in the past time to special slot collection. If the current time is 11 AM then the slot (12 am - 10:59am) is added in special slots. So It is reflected in Scheduleview and background color is changed. Now I have one more slot for setting the day break. The slot (10am-10:30am) is the break time. So I also need to add this in the special slot collection. If I add this the bg color of the break slot is very darker when compared to others. Because already one slot ( from 12 am -10:59) is a special slot. I dont want this to happen. HOw to do this?

With Thanks and Regards
Jeyakumar

ScheduleView

asked on 15 Nov 2011

1 answer

104 views

Apply Filter on Expanded node only

Hello,

I have a treelistview. When user right click on an item and applies filter then I add one FilterDescriptor to the treelistview.
But it tries to filter on all the rows. My requirement is when user right click on any item then the filter should be applied only to the expanded nodes, not to those are collapsed nodes.

I have treelistview having upto 7 levels of expanded nodes. What i want is when user applies filter descriptor then it should filter all the data whose first level is expanded

Level 1

Level 2

Level 3

Level 4

Level 5

Level 6

Level 7

(-)

Org

Dept 1

Cell 1

Mgr 1

Lead 1

Resp 1

Work1

Work2

Work3

Resp 2

Work4

Work5

Work6

(+)

Dept 2

(+)

Dept 3

(-)

Dept4

Cell 4

Mgr 4

Lead 4

Resp 4

Work1

Work2

Work3

Resp 4

Work4

Work5

Work6

Dept 2 & Dept 3 are not in expanded state. While I filter I want the filter should be applied to those records of Dept 1 & Dept 4 only

User can right click on Level 7 data

.

TreeListView

answered on 15 Nov 2011

2 answers

252 views

How to cancel the Current Item Changed event

There are times when I would need to cancel the Current Item Changed event. This is based on un-saved data for exmaple. So, when the user clicks on the right/left arrows (for navigation), the Data Form instantly changes the Current Item and then fires the event.

Well, if conditions determine that the user should not move forward/backward, how do I go back to the previous Current Item?

Example: Data Form has three values (1, 2, 3). Current Item is 2. User clicks right nav. arrow and Data Form takes the user to Item 3. based on a condition (true/false) I need the Data Form to stay on item 2 (or go back to item 2)

Any ideas would be appreciated.

Thanks, M

DataForm

answered on 14 Nov 2011

2 answers

89 views

Hide specific days of a week in WeekView

Hello,

In a ScheduleView, I need to hide some days of each week (for example wednesdays and fridays). I look at the grouping and filtering functionalities, but I'm not sure it can help me with my need.

Is it possible to do this on a ScheduleView (only in WeekView) ? If yes, can you tell me how ?

Thank you in advance

Pauline

ScheduleView

answered on 14 Nov 2011

8 answers

378 views

How can I hide a Row in the GridView?

I would like to hide some rows in a GridView, however setting the Row's visibility to Collapsed still leaves a blank space where the row should be.

The trigger I am using to hide both GridViewGroupRows and GridViewRows looks like this:

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

<Setter Property="Visibility" Value="Visible" />

<Style.Triggers>

<DataTrigger Binding="{Binding Group.Key, RelativeSource={RelativeSource Self}}" Value="SomeValue">

<Setter Property="Visibility" Value="Collapsed" />

</DataTrigger>

</Style.Triggers>

</Style>

I do not want to filter results because I need them for aggregate results in the groups and the footer. So how can I hide specific GridViewRows without filtering the data?

GridView

answered on 14 Nov 2011