Questions on UI for WPF Forum

3 answers

375 views

I and my partner are trying to figure out how to move current row (the highlighted one) in the RadGridView by pressing "Up" or "Down" buttons on our form. Is there a way of doing it ?

GridView

answered on 13 Jul 2009

1 answer

381 views

[Solved] Asynchronous loading blocks of data

I'm populating a RadGridView with data that comes in asynchronously from a WCF service. The service sends blocks of records, say 200 at a time, which are then put into an ObservableCollection which is bound to the ItemsSource property of the grid. I would like to turn on Asynchronous loading of the data (DataLoadMode=Asynchronous), but when I do this, I get the following exception:

Collection was modified; enumeration operation may not execute.

    
            at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)  
        
            at System.Collections.Generic.List`1.Enumerator.MoveNextRare()  
        
            at System.Collections.Generic.List`1.Enumerator.MoveNext()  
        
            at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()  
        
            at Telerik.Windows.Data.QueryableCollectionView.CreateInternalList() in c:\\Builds\\WPF_Scrum\\Core_WPF\\Sources\\Development\\Core\\Data\\Collections\\QueryableCollectionView.cs:line 423  
        
            at Telerik.Windows.Data.QueryableCollectionView.get_InternalList() in c:\\Builds\\WPF_Scrum\\Core_WPF\\Sources\\Development\\Core\\Data\\Collections\\QueryableCollectionView.cs:line 406  
        
            at Telerik.Windows.Data.QueryableCollectionView.GetEnumerator() in c:\\Builds\\WPF_Scrum\\Core_WPF\\Sources\\Development\\Core\\Data\\Collections\\QueryableCollectionView.cs:line 269  
        
            at Telerik.Windows.Data.RecordFactory.<CreateRecordsForGroupRecord>d__0.MoveNext() in c:\\Builds\\WPF_Scrum\\Core_WPF\\Sources\\Development\\Core\\Data\\Data\\Records\\RecordFactory.cs:line 28  
        
            at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)\r\n   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)  
        
            at Telerik.Windows.Controls.GridView.GridViewDataControl.PopulateRecords() in c:\\Builds\\WPF_Scrum\\GridView_WPF\\Sources\\Development\\Controls\\GridView\\GridView\\GridView\\GridViewDataControl.cs:line 3178  
        
            at Telerik.Windows.Controls.GridView.GridViewDataControl.OnAsyncDataLoadWorkerDoWork(Object sender, DoWorkEventArgs e) in c:\\Builds\\WPF_Scrum\\GridView_WPF\\Sources\\Development\\Controls\\GridView\\GridView\\GridView\\GridViewDataControl.cs:line 3153  
        
            at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)\r\n   at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)"

This is with the Q2 2009 release of the WPF controls.

The datasource will be continually updated and changed as records are added and deleted to it.

Any ideas on how I can get this to work safely?

Thanks!

GridView

answered on 13 Jul 2009

1 answer

125 views

Change GridRow background colors

Hi There

I am wondering if it is possible to change row background colors programmatically instead of using the UseAlternateRowStyle property. Since the latter only allows to choose two colors. If possible, How?

Many thanks

Fu

GridView

answered on 10 Jul 2009

1 answer

204 views

How do i make a label inside a gauge?

I want to put a label with the unit inside my gauge, for example "C°", that is on the same place if i resize the gauge. How do i do?

Gauges

answered on 10 Jul 2009

3 answers

169 views

Edit Control Parts in Blend

Blend 2.5
RadControls 2008 Q3

Edit Control Parts (Template) > Edit a Copy > This Document >

Exception: Type Reference cannot find public type named 'RadGridView'

Any clue?

GridView

answered on 09 Jul 2009

2 answers

150 views

[Solved] Excessive gaps at each end of line chart

Using the new facilities in the Q2 charts, e.g. strict mode, and the automatic label stepping - many thanks for doing these - I am now much happier with the radchart for the purpose I want to put it to - real time plotting of weather data. I've bound a line chart to a collection containing a DateTime and a temperature, and the resulting chart is working well, apart from the fact that it doesn't fill the whole X axis. Sometimes the gap at each end is quite large relative to the size of the plot, e.g:

http://nybbles.co.uk/images/chart1.jpg

The first point was actually plotted at about 21:20:30.

Is it possible to make the line fill the chart?

Steve

Chart

answered on 09 Jul 2009

3 answers

268 views

[Solved] Can't bind to hierarchical object data

Hi

I've been following this example for binding to object data.

However I can't specify the <DataTemplate>.

Instead I get the message "Property 'VisualTree' does not support values of type 'DataTemplate'".

What am I doing wrong?

    
            <UserControl x:Class="ReportDistribution.Client.ReportMgr.WpfApp.UserControls.ReportMenuPanel" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     
        
                xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation" 
        
                Height="300" Width="270"> 
        
                <UserControl.Resources>         
        
                    <ItemsControl> 
        
                        <ItemsControl.ItemTemplate> 
        
                            <HierarchicalDataTemplate x:Key="Entity" ItemsSource="{Binding ClientReport}">                    
        
                                <DataTemplate> 
        
                                    <TextBlock Text="{Binding Name}"></TextBlock> 
        
                                </DataTemplate> 
        
                            </HierarchicalDataTemplate> 
        
                        </ItemsControl.ItemTemplate> 
        
                    </ItemsControl>    
        
                </UserControl.Resources> 
        
                <Grid>         
        
                    <Grid.RowDefinitions> 
        
                        <RowDefinition Height="35"></RowDefinition> 
        
                        <RowDefinition></RowDefinition> 
        
                    </Grid.RowDefinitions> 
        
                    <Grid.ColumnDefinitions> 
        
                        <ColumnDefinition></ColumnDefinition> 
        
                    </Grid.ColumnDefinitions> 
        
                    <Border Grid.Row="0" BorderBrush="Black" BorderThickness="1"> 
        
                        <Border.Background> 
        
                            <LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1"> 
        
                                <GradientStop Color="#ADCFFF" /> 
        
                                <GradientStop Color="#599BFF" Offset="1"></GradientStop> 
        
                            </LinearGradientBrush> 
        
                        </Border.Background> 
        
                    </Border> 
        
                    <TextBlock Grid.Row="0" VerticalAlignment="Center" FontSize="14" FontWeight="Bold" Margin="5">Reports</TextBlock> 
        
                    <Border Grid.Row="1" BorderBrush="Black" BorderThickness="1,0,1,1"> 
        
                        <Border.Background> 
        
                            <SolidColorBrush Color="White" /> 
        
                        </Border.Background> 
        
                    </Border> 
        
                    <telerik:RadPanelBar x:Name="reportMenuPanelBar" Grid.Row="1" Margin="1,0,1,1" ItemTemplate="{StaticResource Entity}" ItemsSource="{Binding}"> 
        
                    </telerik:RadPanelBar> 
        
                </Grid> 
        
            </UserControl>

PanelBar

answered on 09 Jul 2009

2 answers

304 views

[Solved] Get list of displayed items

Hello

My WPF RadGridView is bound to a list of business objects using its ItemsSource property. So far we were using the grid's Records property to get all objects that are being displayed after filtering and in the current sort order. In the latest version of the WPF control suite (Q2 2009) mostly everything related to RadGridView.Records (Record and DataRecord class) is marked as obsolete. So how to get the list of displayed items now?

I've already tried CollectionViewSource.GetDefaultView(myGrid.ItemsSource) but this gets the whole list not only the list after filtering.

Thanks for any help

Christian

GridView

answered on 09 Jul 2009

10 answers

202 views

Filtered event isn't raised on Clear Filter

Hi,

Is the Filtered event not raised on purpose when the Clear Filter button is clicked?

Thanks.

GridView

answered on 09 Jul 2009

1 answer

196 views

Sorting with custom GridViewRow Template

I have a "hidden" column (made visible for debugging) called "Index" that I am sorting by... When I first load the grid, the grid is loaded in the correct way - but probably because my list of objects is already sorted. I implemented some custom commands attached to buttons inside the GridViewRow Template for moving objects UP or DOWN in the grid. When the Move Up or Move Down buttons are pressed, the items are removed from the list, inserted at the right location and the list's Index properties are corrected for the new order...

BUT The first time I press Move Up or Move Down, the index changes (I see the indexes in the data records change), but the grid doesn't refresh the items. The NEXT time I press either button, the grid resorts but not in a nice way... Items are always in the wrong order.

For example:

Start with these objects in the grid
1 - AAA
2 - BBB
3 - CCC

Move Down for object AAA: Remove object AAA, insert at new spot in list, reindex. Grid shows:
2- AAA
1 - BBB
3 - CCC

Move Down for object AAA: Remove object AAA, insert at new spot in list, reindex. Grid shows:
2 - CCC
1 - AAA
3 - BBB

I may have to put a small sample together but I'm hoping not. Here is how I have my grid defined:

    
                        <telerik:RadGridView x:Name="SettingsGrid" ItemsSource="{Binding ElementName=UC, Path=CurrentTeamProjectList}" ScrollMode="RealTime"  
        
                                                 AutoGenerateColumns="False" ShowGroupPanel="False" IsFilteringAllowed="False" ColumnsWidthMode="Fill" ShowColumnHeaders="False" 
        
                                                 CanUserFreezeColumns="False" CanUserReorderColumns="False" CanUserSortColumns="False" VerticalGridlinesVisibility="Hidden" 
        
                                                 Margin="4,2,4,2" Loaded="SettingsGrid_Loaded"> 
        
                            <telerik:RadGridView.Columns> 
        
                                <telerik:GridViewDataColumn UniqueName="Index" IsReadOnly="True" DataType="{x:Type System:Int32}"/> 
        
                                <telerik:GridViewDataColumn UniqueName="Name" IsReadOnly="True" DataType="{x:Type System:String}"/> 
        
                                <telerik:GridViewDataColumn UniqueName="Boolean1" DataType="{x:Type System:Boolean}"/> 
        
                                <telerik:GridViewDataColumn UniqueName="Boolean2" DataType="{x:Type System:Boolean}"/> 
        
                                <telerik:GridViewDataColumn UniqueName="NumSeconds" DataType="{x:Type System:Int32}"/> 
        
                            </telerik:RadGridView.Columns> 
        
                            <telerik:RadGridView.SortDescriptions> 
        
                                <cm:SortDescription PropertyName="Index" Direction="Ascending" /> 
        
                            </telerik:RadGridView.SortDescriptions> 
        
                        </telerik:RadGridView>

I tried adding a SortDescription object to the SortDescriptions collection in the grid loaded event, but that did the same thing.

Thoughts?
Greg

GridView

answered on 08 Jul 2009