Questions on UI for WPF Forum

16 answers

1.4K+ views

Tricky header bindings in GridViewDataColumn

Hi,

I'm having some trouble using bindings in my column headers. After reading this post: http://www.telerik.com/community/forums/wpf/gridview/binding-the-header-property-of-a-gridviewcolumn.aspx it seems like you have to have the property you are binding to available when the column is initialised, otherwise it will not get updated.

I am wanting to bind to a property of the data context of a parent of the control that hosts the RadGridView. The DataContext hasn't been set by the time the column is initialized. Is there a way around this? I had a few ideas:

- Is there some event I can handle which is called before the columns are initialized, but after we have access to the UserControl's parent and hence its DataContext.
- Is there a way to reset the columns and hence the bindings?

I'm trying an MVVM approach, but I can't seem to fit in the ModelView approach with the column headers as I can't bind. The only way is to have the DataContext set in the control constructor, but that's fairly limited and I would rather avoid it.

Any suggestions / tips would be much appreciated!

GridView

answered on 06 Jun 2016

0 answers

140 views

Xaml TextBox Text binding code make it common

We have big WPF application with multiple screen. Each screen have multiple textboxes.

We have used MVVM pattern so textboxes are bound to VM using like:
{Binding Name,Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}

In Most of the textboxes BUT not all, we want to set Delay Property to some value say 500 like:

{Binding Name,Delay=500,Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}

Rather than setting this on each textbox xaml line is there some shorter way to handle this?

something like Style.xaml etc?
These changes are applicable for most of the textboxes but not all....

General Discussions

asked on 04 Jun 2016

1 answer

81 views

RadTileView only updating one record at a time

Hello,

I have a program I am creating where the tileview represents a collection of computers, with one tile per computer. The data that backs this is bound as follows;

<telerik:RadTileView

x:Name="radTileView"

MaximizeMode="ZeroOrOne"

ColumnWidth="250"

ItemsSource="{Binding Data, Source={StaticResource context}}"

ItemTemplate="{StaticResource ItemTemplate}"

ContentTemplate="{StaticResource ContentTemplate}"

IsVirtualizing="True"

RowHeight="250"

Grid.Column="2"

Grid.Row="0"

Margin="8,1,10,10"

/>

In my ViewModel, Data is an observable collection, like this;

private ObservableCollection<ImagingData> _imagingData = new ObservableCollection<ImagingData>();

public ObservableCollection<ImagingData> Data

{

get

{

return _imagingData;

}

set

{

_imagingData = value;

OnPropertyChanged(() => this.Data);

}

Data is updated by a timer event that polls a database backend. If i simply update Data by replacing it, everything works fine, except it makes for a poor UI experience since the pane resets constantly. To make for a better experience, where tiles stay maximized, and stay where you put them, i implemented a sort of delta sync. When the timer event pops, I call UpdateData() with the UI dispatcher. UpdateData copies Data to an array, then adds new records, deletes records that are not in scope anymore, and updates fields on records that already exist. it is a crude proof of concept, but here it is;

private void UpdateData(ImagingData[] newItems, ImagingData[] existing)

{

//var dataArray = _imagingData.ToArray();

foreach (var item in existing)

{

var matchedItem = newItems.Where(c => c.ComputerName == item.ComputerName).FirstOrDefault();

if (matchedItem == null)

Data.Remove(item);

}

foreach (var item in newItems)

{

var matchedItem = existing.Where(c => c.ComputerName == item.ComputerName).FirstOrDefault();

if(matchedItem == null)

{

Data.Add(item);

return;

}

matchedItem.ImagingPasses = item.ImagingPasses;

matchedItem.LastKnownActivity = item.LastKnownActivity;

matchedItem.ImagingState = item.ImagingState;

}

OnPropertyChanged("Data");

}

The problem I am having that when i use this method, only 1 record is added to the Data collection each time the update timer fires, even though I have confirmed that the update loop does iterate over all the members. Visually, you see one tile appear, then the next, then the next, etc, separated by one timer iteration. I have tried all manner of different ways to remedy this but nothing seems to work.

TileView

answered on 03 Jun 2016

5 answers

360 views

Can we change the time picker up drop down screen width?

In RadTimePicker, click the toggle button, the drop down screen shows up.
Since we layout the RadTimePicker in right side main screen, the drop down screen seems to wider, it crosses the main window boundary. See the attachment.
Is there a way we can change the drop down screen width, so it will not cross the main window boundary?
thx!
Jane

TimePicker

answered on 03 Jun 2016

1 answer

75 views

Diagram and docking at same level

I get an XmlParseException when I place a RadDiagram control at the same level as a RadDocking control and attempt to run.

System.Windows.Markup.XamlParseException occurred
HResult=-2146233087
LineNumber=14
LinePosition=11
Message=Could not load file or assembly 'Telerik.Windows.Controls, Version=2016.2.503.40, Culture=neutral, PublicKeyToken=5803cfa389c90ce7' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Source=PresentationFramework
StackTrace:
       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 TelerikWpfApp1.MainWindow.InitializeComponent() in D:\visual studio 2015 Projects\TelerikWpfSolution\TelerikWpfApp1\MainWindow.xaml:line 1
InnerException:
       FileName=Telerik.Windows.Controls, Version=2016.2.503.40, Culture=neutral, PublicKeyToken=5803cfa389c90ce7
       FusionLog==== Pre-bind state information ===
LOG: DisplayName = Telerik.Windows.Controls, Version=2016.2.503.40, Culture=neutral, PublicKeyToken=5803cfa389c90ce7
(Fully-specified)
LOG: Appbase = file:///D:/visual studio 2015 Projects/TelerikWpfSolution/TelerikWpfApp1/bin/Debug/
LOG: Initial PrivatePath = NULL
Calling assembly : Telerik.Windows.Controls.Docking, Version=2016.2.503.40, Culture=neutral, PublicKeyToken=5803cfa389c90ce7.
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: D:\visual studio 2015 Projects\TelerikWpfSolution\TelerikWpfApp1\bin\Debug\TelerikWpfApp1.vshost.exe.Config
LOG: Using host configuration file:
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Post-policy reference: Telerik.Windows.Controls, Version=2016.2.503.40, Culture=neutral, PublicKeyToken=5803cfa389c90ce7
LOG: Attempting download of new URL file:///D:/visual studio 2015 Projects/TelerikWpfSolution/TelerikWpfApp1/bin/Debug/Telerik.Windows.Controls.DLL.
WRN: Comparing the assembly name resulted in the mismatch: Revision Number
ERR: Failed to complete setup of assembly (hr = 0x80131040). Probing terminated.
       HResult=-2146234304
       Message=Could not load file or assembly 'Telerik.Windows.Controls, Version=2016.2.503.40, Culture=neutral, PublicKeyToken=5803cfa389c90ce7' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
       Source=mscorlib
       StackTrace:
            at System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type)
            at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)
            at System.Reflection.Assembly.GetType(String name, Boolean throwOnError)
            at System.Windows.Baml2006.Baml2006SchemaContext.ResolveBamlTypeToType(BamlType bamlType)
            at System.Windows.Baml2006.Baml2006SchemaContext.ResolveBamlType(BamlType bamlType, Int16 typeId)
            at System.Windows.Baml2006.Baml2006SchemaContext.GetXamlType(Int16 typeId)
            at System.Windows.Baml2006.Baml2006Reader.Process_ElementStart()
            at System.Windows.Baml2006.Baml2006Reader.Process_OneBamlRecord()
            at System.Windows.Baml2006.Baml2006Reader.Process_BamlRecords()
            at System.Windows.Baml2006.Baml2006Reader.Read()
            at System.Windows.Markup.WpfXamlLoader.TransformNodes(XamlReader xamlReader, XamlObjectWriter xamlWriter, Boolean onlyLoadOneNode, Boolean skipJournaledProperties, Boolean shouldPassLineNumberInfo, IXamlLineInfo xamlLineInfo, IXamlLineInfoConsumer xamlLineInfoConsumer, XamlContextStack`1 stack, IStyleConnector styleConnector)
            at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
       InnerException:

Diagram

answered on 03 Jun 2016

1 answer

160 views

Access column properties from header style

Hello team,

I'm trying to acces IsReadOnly property from header style to change its foreground color. For now, I didn't find a solution. I'm trying the following:

...

<Style.Triggers>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewDataColumn}}, Path=Column.IsReadOnly}" Value="false">
<Setter Property="Foreground" Value="{DynamicResource primaryBrush}" />
</DataTrigger>
</Style.Triggers>
</Style>

GridView

answered on 03 Jun 2016

1 answer

208 views

Pasting MS Word Formatted Fragments

Trying to figure out the best way via code to paste from a word document (using interop) a fragment of formatted text to a RichTextEditor as Html that is filtered. I can easily just paste, but then it seems I get a whole bunch of Word specific format. I want to paste filtered text. How would I go about this?

RichTextBox

answered on 03 Jun 2016

1 answer

184 views

Make entire view read-only?

I'm sure this is trivial, but I don't see a property that would make it happen. I'd like to make my entire GanttView read-only, so that it doesn't permit any changes to dates or tasks either in the text columns or by dragging tasks around. I've tried setting "IsEnabled" to false, but that prevents me from resizing the columns. Suggestions?

Thanks!

Brad.

GanttView

answered on 02 Jun 2016

1 answer

76 views

RadChart - can I set a style for brushes in PaletteBrushes

Hello,

I have a flollowing problem in the RadChart control. I've defined brushes like this

<telerik:RadChart.PaletteBrushes>
<SolidColorBrush Color="Green" />
<SolidColorBrush Color="Gray" />
<SolidColorBrush Color="Orange" />
</telerik:RadChart.PaletteBrushes>

which works fine,but I wanted to reuse this in many places if possible. How can I do it?

Alternatively can I set a Brush for each slice via Binding? My viewmodel for the slice has a Brush property let's say MyBrush. Is there a way to bind it in a series definition?

Thanks in advance!

Krzysztof

Chart