Questions on UI for WPF Forum

1 answer

168 views

I have a reference in my xaml as such:
xmlns:maskedInput="clr-namespace:Telerik.Windows.Controls.MaskedInput;assembly=Telerik.Windows.Controls.Input"

I am trying to set the Minimum value in the style as such:
<Style x:Key="RadMaskedCurrencyInputStyle" TargetType="telerik:RadMaskedCurrencyInput">
<Setter Property="maskedInput:MaskedInputExtensions.Minimum" Value="0" />
</Style>

This throws an exception at run time:
System.Windows.Markup.XamlParseException occurred
Message='Set property 'System.Windows.Setter.Property' threw an exception.' Line number '10' and line position '14'.
Source=PresentationFramework
LineNumber=10
LinePosition=14
StackTrace:
at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)
at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
at TestRadControl.MainWindow.InitializeComponent() in ...\Documents\Visual Studio 2010\Projects\TestRadControl\TestRadControl\MainWindow.xaml:line 1
at TestRadControl.MainWindow..ctor() in ...2010\Projects\TestRadControl\TestRadControl\MainWindow.xaml.cs:line 25
InnerException: System.ArgumentNullException
Message=Value cannot be null.
Parameter name: property
Source=PresentationFramework
ParamName=property
StackTrace:
at System.Windows.Setter.CheckValidProperty(DependencyProperty property)
at System.Windows.Baml2006.WpfSharedBamlSchemaContext.<Create_BamlProperty_Setter_Property>b__1c0(Object target, Object value)
at System.Windows.Baml2006.WpfKnownMemberInvoker.SetValue(Object instance, Object value)
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(XamlMember member, Object obj, Object value)
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(Object inst, XamlMember property, Object value)
InnerException:

Is this a flaw with Telerik's implementation of the Minimum dependency property? I am using version 2011 SP1.

Thanks,
Monica

MaskedInput (Numeric, DateTime, Text, Currency)

answered on 18 May 2012

1 answer

99 views

Give same behavior for dot and comma in GridViewDataColumn

Hello,

I have my application in "pt-PT" culture, and have this column.

<telerik:GridViewDataColumn IsSortable="False" IsFilterable="False" Header="Preço Unitário" DataMemberBinding="{Binding PrecoUnitario}"

DataFormatString="{}{0:C}" MinWidth="60" MaxWidth="100" HeaderCellStyle="{StaticResource estiloDaColuna}"/>

introducing "20.2", it places "202,00".
introducing "20,2" it places "20,20".

In "en-US" culture works well.

So, how can i give the same behavior for dot and comma?

Thanks

GridView

answered on 18 May 2012

0 answers

112 views

Parent grid and Child grid

Hi,
I need a sample code for to create the parent and child grid.
Regards
Rajini

GridView

asked on 18 May 2012

0 answers

82 views

Get Next/Previous Annotation Types (code sample)

Here is a code sample that gets the Type Of the Next & Previous Annotation at the caret position.
.
Get TypeOf Next Annotation:

public static AnnotationRangeMarkerBase GetNextAnnotationMarker(this RadDocument document)

{

if (!document.Selection.IsEmpty)

{

document.CaretPosition.MoveToPosition(document.Selection.Ranges.Last.EndPosition);

}

InlineLayoutBox inlineLayoutBox = document.CaretPosition.GetCurrentInlineBox();

while (inlineLayoutBox != null && !(inlineLayoutBox.AssociatedInline is AnnotationRangeMarkerBase))

{

inlineLayoutBox = (InlineLayoutBox)DocumentStructureCollection.GetNextElementOfType(inlineLayoutBox, typeof(AnnotationMarkerLayoutBox));

}

if (inlineLayoutBox == null)

{

return null;

}

AnnotationRangeMarkerBase annotationMarker = inlineLayoutBox.AssociatedInline as AnnotationRangeMarkerBase;

if (annotationMarker == null)

{

return null;

}

return annotationMarker;

}

Get TypeOf Previous Annotation:

public static AnnotationRangeMarkerBase GetPreviousAnnotationMarker(this RadDocument document)

{

if (!document.Selection.IsEmpty)

{

document.CaretPosition.MoveToPosition(document.Selection.Ranges.Last.StartPosition);

}

InlineLayoutBox inlineLayoutBox = document.CaretPosition.GetCurrentInlineBox();

do

{

inlineLayoutBox = (InlineLayoutBox)DocumentStructureCollection.GetPreviousElementOfType(inlineLayoutBox, typeof(AnnotationMarkerLayoutBox));

}

while (inlineLayoutBox != null && !(inlineLayoutBox.AssociatedInline is AnnotationRangeStart));

if (inlineLayoutBox == null)

{

return null;

}

return inlineLayoutBox.AssociatedInline as AnnotationRangeMarkerBase;

}

This is how you can use the methods:

//Get the previous annotation type

AnnotationRangeMarkerBase previousAnnotationType = RadDocumentExtensions.GetPreviousAnnotationMarker(radRichTextBox.Document);

//Get the next annotation type

AnnotationRangeMarkerBase nextAnnotationType = RadDocumentExtensions.GetNextAnnotationMarker(radRichTextBox.Document);

I hope this help you as it did me.

p.s. This code was mostly given to me by the Telerik support team via a ticket that I sent.

RichTextBox

asked on 18 May 2012

1 answer

164 views

Inconsistent behavior in GridViewDataColumn template binding

I have a column in my RadGridView that displays some text and then also contains a button that should only be visible to users with permission to change the data. I'm using MVVM and the viewmodel exposes a boolean property named UserHasWriteAccess that indicates the user's permission level. The column and its datatemplate are defined as follows.

<telerik:GridViewDataColumn Header="Reason Code">

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="*" />

<ColumnDefinition Width="Auto" />

</Grid.ColumnDefinitions>

<TextBlock Text="Lorem ipsum" />

<Button Content="Edit"

Height="23"

HorizontalAlignment="Right"

Margin="4,0,0,0"

Visibility="{Binding DataContext.UserHasWriteAccess,

Mode=OneTime,

Converter={StaticResource BooleanToVisibilityConverter},

RelativeSource={RelativeSource AncestorType=telerik:RadGridView}}">

</Grid>

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

</telerik:GridViewDataColumn>

When UserHasWriteAccess is false, the button's visibility binding works fine most of the time (~99%) and the button does not show. However, as the user scrolls up and down through the grid, eventually intermittent binding errors will suddenly appear for a row or two for which the binding worked previously. Sometimes the user has to scroll up and down several times before it happens. Other times it's immediate. The errors say:

System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='Telerik.Windows.Controls.RadGridView', AncestorLevel='1''. BindingExpression:Path=DataContext.UserHasWriteAccess; DataItem=null; target element is 'Button' (Name=''); target property is 'Visibility' (type 'Visibility')

Curiously, when I inspect an errored binding using Snoop, it suddenly works again.

Is there a known issue with ancestor binding in RadGridView?

GridView

answered on 18 May 2012

1 answer

327 views

Empty text in NumericUpDown issue

Hello!

We are using MVVM pattern to build our application. One of our views uses number of NumericUpDown controls. If text of some NumericUpDown is set to empty string by user control displays red frame (see screenshot "validation error"). Property definition you can find in screenshot named "amount property".

The problem is that view model is not updated when text is empty and red frame is displayed. E.g. model still contains previous value.

What is correct way to notify View Model about missing data? Keep in mind that we have significant number of views and each contains set of numeric controls.

NumericUpDown

answered on 18 May 2012

0 answers

175 views

WPF RadGrid copy Cell value to clipboard.

We have a WPF app which uses RadGrid. As part of the app functionality, we want the grid selection unit to always be of type "row". In addition to this, we also want to expose a mechanism where the user can select a cell value for copy/paste to clipboard. Is there a way to do this? For example, double clicking a cell copies the cell value where as single click always selects the row. Or right click on cell exposes the option to "Copy cell" value?

Thanks!

GridView

asked on 18 May 2012

1 answer

75 views

Gridview and SqlCeResultSet

Does the wpf GridView support direct binding to SqlCeResultSet?

GridView

answered on 18 May 2012

1 answer

197 views

Overlay Icon

Hi,

I'm using RadControls for WPF (version 2012.1.326.40), and my question is about the RadTreeView.
Is it possible to show an overlay image over the RadTreeViewItem's DefaultImageSrc ?

Best regards,

TreeView

answered on 18 May 2012

3 answers

315 views

Trouble putting ContextMenu on ListBoxItems nested in RadPanelBarItem

Hi All,

Edit: The title should state that the issue is with ListView items and not ListBox items. Cannot change it now - sorry about the confusion.

I am trying to put a context menu on items in a ListView when that ListView is contained within a RadPanelBarItem that has a context menu. I hope the code example below illustrates what I am trying to do. If I don't add the following then the list items show the expected menu.

<telerik:RadContextMenu.ContextMenu>

<telerik:RadContextMenu x:Name="_macroActionContextMenu" />

</telerik:RadContextMenu.ContextMenu>

When I add it (as shown in the snippet below) then I always get the context menu associated with the RadPanelBarItem when I right click on the ListView elements rather than the context menu specified for the ListView.ItemContainerStyle.

Any help would be appreciated. My code snippet is below.

<telerik:RadPanelBarItem Name="_rpbiMacros" Header="Macros" IsDropAllowed="False" Foreground="#FF4D4D4D" BorderBrush="#FFBCB596" >

<telerik:RadContextMenu.ContextMenu>

<telerik:RadContextMenu x:Name="_macroActionContextMenu" />

</telerik:RadContextMenu.ContextMenu>

<Grid Width=

"{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:RadPanelBar}}, Path=ActualWidth, Converter={StaticResource mathConverter}, ConverterParameter=@VALUE-12;0}"

>

<WrapPanel Name="_wrpMacroActions"

Visibility=

"{Binding ViewMacroActionListAsIcons, Converter={StaticResource boolToVisibilityConverter}, ConverterParameter=Visibility.Collapsed}"

>

<ItemsControl ItemsSource="{Binding MacroActionViewModelList}" >

... omitted for clarity

</ItemsControl>

</WrapPanel>

<ListView x:Name="_lviewMacroActions" ItemsSource="{Binding MacroActionViewModelList}" ButtonBase.Click="OnClick_ListViewHeader"

Visibility=

"{Binding ViewMacroActionListAsIcons, Converter={StaticResource invertBoolToVisibilityConverter}, ConverterParameter=Visibility.Collapsed}"

>

<ListView.Resources>

<ContextMenu x:Key="itemContextMenu">

<MenuItem Header="Open" Click="OnClick_EditMacroAction">

</MenuItem>

<MenuItem Header="Delete" Click="OnClick_DeleteMacroAction" >

<MenuItem.Icon>

<ContentControl Template="{StaticResource _rscDeleteImage}" />

</MenuItem.Icon>

</MenuItem>

</ContextMenu>

</ListView.Resources>

<ListView.ItemContainerStyle>

<Style TargetType="{x:Type ListViewItem}">

<Setter Property="telerik:RadContextMenu.ContextMenu" Value="{StaticResource itemContextMenu}" />

<EventSetter Event="MouseDoubleClick" Handler="OnDoubleClick_MacroAction" />

</Style>

</ListView.ItemContainerStyle>

<ListView.View>

<GridView>

<GridViewColumn Header="Name" DisplayMemberBinding="{Binding Model.MacroName}"/>

<GridViewColumn Header="Description" DisplayMemberBinding="{Binding Model.MacroDescription}" />

</GridView>

</ListView.View>

</ListView>

</Grid>

</telerik:RadPanelBarItem>

x

ContextMenu

answered on 17 May 2012