Questions on UI for WPF Forum

17 answers

619 views

Hi,

I'm using Telerik V2012.1.325.35 and I have a strange problem RowDetailsTemplate. In my project, I have a main RadGridView and all object in his ItemsSource a "IsDeleted" member of type bool. On the "RowLoaded" of my main RadGridview, I do the following to hide all object with the "IsDeleted" == true and everything working fine:

private void gvExams_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e)
{
ExamForBilling theExam = e.DataElement as ExamForBilling;

            if (theExam != null && e.Row != null)
            {
                e.Row.Visibility = theExam.IsDeleted ? Visibility.Collapsed : Visibility.Visible;
            }
}

In my main grid, I have a RowDetailsTemplate that contain another RadGridView with RowLoaded event where I do the samething to hide deleted object. The problem is for every deleted object, the grid display a blank row. Here is the RowLoaded code of my RowDetailsTemplate RadGridView (screenshot attached):

        private void RadGridView_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e)
        {
            BilledExamsForBilling theExam = e.DataElement as BilledExamsForBilling;

            if (theExam != null && e.Row != null)
            {
                e.Row.Visibility = theExam.IsDeleted ? Visibility.Collapsed : Visibility.Visible;
            }
        }

GridView

answered on 07 Feb 2013

1 answer

161 views

Unhandled exception: RadRichTextBox, HTML loading

Hi, guys!
I got unhandled exception:

System.NullReferenceException was unhandled
Message=Object reference not set to an instance of an object.
Source=Telerik.Windows.Documents
StackTrace:
       at Telerik.Windows.Documents.DocumentStructure.DocumentStructureCollection.GetNextSiblingForDocumentElementOnSameLevel(LayoutBox box, DocumentElement owner) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\DocumentStructure\DocumentStructureCollection.cs:line 896
       at Telerik.Windows.Documents.Model.DocumentElementCollection.<GetEnumerator>d__0.MoveNext() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Model\DocumentElementCollection.cs:line 254
       at Telerik.Windows.Documents.Model.DocumentElement.<EnumerateChildrenOfType>d__0`1.MoveNext() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Model\DocumentElement.cs:line 377
       at Telerik.Windows.Documents.Model.DocumentElement.<EnumerateChildrenOfType>d__0`1.MoveNext() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Model\DocumentElement.cs:line 379
       at Telerik.Windows.Documents.Model.DocumentElement.<EnumerateChildrenOfType>d__0`1.MoveNext() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Model\DocumentElement.cs:line 379
       at Telerik.Windows.Documents.Model.DocumentElement.<EnumerateChildrenOfType>d__0`1.MoveNext() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Model\DocumentElement.cs:line 379
       at Telerik.Windows.Documents.Model.DocumentElement.<EnumerateChildrenOfType>d__0`1.MoveNext() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Model\DocumentElement.cs:line 379
       at Telerik.Windows.Documents.Model.DocumentElement.<EnumerateChildrenOfType>d__0`1.MoveNext() in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Model\DocumentElement.cs:line 379
       at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
       at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
       at Telerik.Windows.Documents.Layout.SectionLayoutBox.GetEndnotesForSection(RadDocument doc, Section section) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Layout\SectionLayoutBox.cs:line 358
       at Telerik.Windows.Documents.Layout.SectionLayoutBox.MeasureOverride(SizeF availableSize) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Layout\SectionLayoutBox.cs:line 300
       at Telerik.Windows.Documents.Layout.LayoutElement.MeasureCore(SizeF availableSize) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Layout\LayoutElement.cs:line 929
       at Telerik.Windows.Documents.Layout.LayoutElement.Measure(SizeF availableSize) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Layout\LayoutElement.cs:line 832
       at Telerik.Windows.Documents.Layout.DocumentLayoutBox.MeasureOverrideInternal(SizeF availableSize) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Layout\DocumentLayoutBox.cs:line 190
       at Telerik.Windows.Documents.Layout.DocumentLayoutBox.MeasureOverride(SizeF availableSize) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Layout\DocumentLayoutBox.cs:line 144
       at Telerik.Windows.Documents.Layout.LayoutElement.MeasureCore(SizeF availableSize) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Layout\LayoutElement.cs:line 929
       at Telerik.Windows.Documents.Layout.LayoutElement.Measure(SizeF availableSize) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Layout\LayoutElement.cs:line 832
       at Telerik.Windows.Documents.Model.RadDocument.Measure(SizeF measureSize) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\Model\RadDocument.cs:line 1066
       at Telerik.Windows.Documents.UI.DocumentPrintLayoutPresenter.MeasureOverride(Size availableSize) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Documents\Core\UI\DocumentPrintLayoutPresenter.cs:line 670
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
       at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Control.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Border.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Control.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
       at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Documents.AdornerDecorator.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Border.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Window.MeasureOverrideHelper(Size constraint)
       at System.Windows.Window.MeasureOverride(Size availableSize)
       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.Application.RunDispatcher(Object ignore)
       at System.Windows.Application.RunInternal(Window window)
       at System.Windows.Application.Run(Window window)
       at System.Windows.Application.Run()
       at WpfApplication6.App.Main() in c:\users\yuliak\documents\visual studio 2010\Projects\WpfApplication6\WpfApplication6\obj\x86\Debug\App.g.cs:line 0
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(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.Threading.ThreadHelper.ThreadStart()

My XAML:

<Window x:Class="WpfApplication6.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="350" Width="525">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="*" />

<RowDefinition Height="Auto"/>

</Grid.RowDefinitions>

<telerik:RadRichTextBox x:Name="viewer" Grid.Row="0" IsReadOnly="true" LayoutMode="Paged"/>

<Button Grid.Row="1" Click="Button_Click">Load File</Button>

</Grid>

</Window>

My Code:

private void LoadDocument(string path)

{

try

{

using (var stream = new FileStream(path, FileMode.Open))

{

IDocumentFormatProvider provider = new HtmlFormatProvider();

RadDocument document = provider.Import(stream);

viewer.CommandError += OnCommandError;

viewer.Document = document;

}

catch (Exception)

{

string str = "";

}

File HTML (code) - please save as file HTML:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

<html>

<body>

<table cellpadding="0" cellspacing="0" border="0" width="100%" class="outer" style="position: relative;">

<tbody>

<tr>

<td>

<table align="center" cellpadding="0" cellspacing="0" border="0" width="670" style=

"border: 0px; border-left: 1px solid #cccccc; border-right: 1px solid #cccccc; background-color: #ffffff;position: relative;"

>

<tbody>

<td rowspan="3"></td>

</tbody>

</table>

</td>

<td rowspan="3"></td>

</tr>

</tbody>

</table>

</body>

</html>

RichTextBox

answered on 07 Feb 2013

3 answers

237 views

RadCombobox with AutoComplete keep calling the selectionchanged before the user decides the selection

I have set the AutoComplete feature for the RadCombobox and this feature while typing a single letter also triggers the selectionchanged. In my scenario, I want to decide after I finished searching for the element I need and then trigger the selectionchanged event. Is it possible?

ComboBox

answered on 07 Feb 2013

5 answers

198 views

AddNewItem() returning false

I have a user control with a RadDataForm. It has a button that is bound to a command that calls radDataForm.AddNewItem().

I'm using the control in two places. In one of them things are working fine. In the other, AddNewItem() is returning false.

Clearly I am doing something wrong, but I'm having the hardest time figuring out what.

Is there anyplace I could look to figure out exactly why AddNewItem() is deciding not to add a new item? Is there some way of turning on some sort of logging trace?

DataForm

answered on 07 Feb 2013

1 answer

170 views

ChartView with draggable annotations

I am adding annotations to ChartView and one of the required functionality is to drag the annotations, how can I get hold of the ChartViews Canvas inorder to use implement my own drag functionallity. If not, is there any other way to do this?

Thanks

ChartView

answered on 07 Feb 2013

3 answers

402 views

Custom Aggregate Function across two columns

Hello,

I have a gridview with the set of columns shown below. The first two columns have AggregateFunctions (sum). I have a third column which should be the the result of dividing VacantSpaceRentableArea by TotalArea. I need this to be inside a custom aggregate function as the totals need to be recalculated as users group data by different columns.

I have seen the examples of custom aggregate functions but all the examples I have seen refer only one column. Is there any way to implement a custom aggregate function that references more than one column?

Thanks.

Edwin

<

telerik:GridViewDataColumn Header="Total Area" DataMemberBinding="{Binding TotalArea}" IsReadOnly="True" DataFormatString="N0">

<telerik:GridViewDataColumn.AggregateFunctions>

<telerik:SumFunction Caption="Total Area: "/>

</telerik:GridViewDataColumn.AggregateFunctions>

</telerik:GridViewDataColumn>

<telerik:GridViewDataColumn Header="Vac. Space Rentable Area" DataMemberBinding="{Binding VacantSpaceRentableArea}" IsReadOnly="True" DataFormatString="N0">

<telerik:GridViewDataColumn.AggregateFunctions>

<telerik:SumFunction Caption="Total Rentable Area: "/>

</telerik:GridViewDataColumn.AggregateFunctions>

</telerik:GridViewDataColumn>

<telerik:GridViewDataColumn Header="Vac. % Based on Rentable Area" DataMemberBinding="{Binding VacancyPctOfRentableArea}" IsReadOnly="True" DataFormatString="P2">

</telerik:GridViewDataColumn>

GridView

answered on 06 Feb 2013

7 answers

225 views

TreeView Edited event NewValue and OldValue

Hi, so I'm in this event I need the old value to do some evaluation, but instead, I get the NewValue on both objects:

                    private void treeViewExperimentExplorer_Edited(object sender, RadTreeViewItemEditedEventArgs e)         
            {         
                string newName = e.NewValue.ToString();         
                string oldName = e.OldValue.ToString();         
            }         

In there both newName and oldName have the new value. How can I get the previous value in there?

Thanks!

TreeView

answered on 06 Feb 2013

1 answer

158 views

Disabling url navigation, running script and loading images from internet

Hi, all!
I have a task to display document from html in RadRichTextBox, but without any working links, with prevention of loading smth. from internet (for example displaying images with url source) and disabling any script. How can I reach this purpose?
I tried HtmlFormatProvider.Import() with RadDocument , and HtmlDataProvider in XAML. Please help.
Yulia.

RichTextBox

answered on 06 Feb 2013

1 answer

87 views

Removing white background from RadDataPager's NumericElementsPresenter

We're currently using the 2012 Q1 version of Telerik Controls for WPF (or at least the DLL's version number is 2012.1.326.40). I am trying to style the control with Visual Studio 2012 using the designer by copying the existing control template. The RadDataPager's NumericElementsPresenter has a white background that we would rather have as transparent.

Unfortunately, every time I try to edit the existing template/style for the NumericElementsPresenter (and set the style tag to point to the resource) all of the buttons disappear and/or it starts using the Office theme instead of Metro. It also appears that the Metro theme colors are not being used, and I do not want to manually replace all of those colors in the template.

Is there a way to remove the white background from the NumericElementsPresenter and/or successfully create a copy of the current Metro template? Ideally the background would use a templatebinding and inherit the control's background instead.

DataPager

answered on 06 Feb 2013

1 answer

103 views

Export to Excel

Is it possible to export a chartview to excel?

ChartView

answered on 06 Feb 2013