Questions on UI for WPF Forum

2 answers

70 views

Hello,

It looks like using a filter on one of my grid columns stops RowEditEnded from being invoked properly after the filtering.

I'm binding my grid to an ObservableCollection<> of business objects, and I have everything set up so updating/inserting rows works properly in most cases. However I've noticed that if I use a column filter and narrow down the rows displayed, for example to only those rows including certain text in that column, that any subsequent edits won't be saved because RowEditEnded no longer gets invoked when I finish editing one of the remaining rows.

Have you seen this behavior before? Is there something I'm doing wrong, or is this a known issue?

I can submit a ticket and provide a sample project if necessary.

Thanks for any help you can provide!

Eddie

GridView

answered on 05 Feb 2010

2 answers

118 views

GridViewDataColumn: IDataErrorInfo awareness

Hi.
I am using the following code:

    
                public partial class Window1 
        
                { 
        
                    public Window1() 
        
                    { 
        
                        InitializeComponent(); 
        
                        this.Foos = new ObservableCollection<Foo>(new[] 
        
                                    { 
        
                                        new Foo { Name = "1" }, 
        
                                        new Foo { Name = "2" }, 
        
                                    }); 
        
                    } 
        
                    private void Window_Loaded(object sender, RoutedEventArgs e) 
        
                    { 
        
                        this.DataContext = this; 
        
                    } 
        
                    public ObservableCollection<Foo> Foos{ get; set;} 
        
                } 
        
                public class Foo : IDataErrorInfo 
        
                { 
        
                    public string this[string columnName] 
        
                    { 
        
                        get 
        
                        { 
        
                            return "Error"; 
        
                        } 
        
                    } 
        
                    public string Error 
        
                    { 
        
                        get 
        
                        { 
        
                            return "Error!"; 
        
                        } 
        
                    } 
        
                    public string Name { get; set; } 
        
                }

in combination with this xaml:

    
            <Window x:Class="WpfApplication6.Window1" 
        
                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.GridView" 
        
                Title="Window1" Height="300" Width="300" 
        
                    Loaded="Window_Loaded"> 
        
                <telerik:RadGridView ItemsSource="{Binding Path=Foos}" 
        
                                     AutoGenerateColumns="False"> 
        
                    <telerik:RadGridView.Columns> 
        
                        <telerik:GridViewDataColumn Header="Name 1" 
        
                                                    DataMemberBinding="{Binding Path=Name, ValidatesOnDataErrors=True}" /> 
        
                        <telerik:GridViewColumn Header="Name 2"> 
        
                            <telerik:GridViewColumn.CellTemplate> 
        
                                <DataTemplate> 
        
                                    <TextBox Text="{Binding Path=Name, ValidatesOnDataErrors=True}" /> 
        
                                </DataTemplate> 
        
                            </telerik:GridViewColumn.CellTemplate> 
        
                        </telerik:GridViewColumn> 
        
                    </telerik:RadGridView.Columns>         
        
                </telerik:RadGridView> 
        
            </Window>

The second TextBox "Name 2" does show the DataErrors fine. However the GridViewDataColumn ("Name 1") seems unaware of the DataErrorInfos.

Am I missing something or is the GridVioewDataColumn unaware of IDataErrorInfo ?

Nils

GridView

answered on 05 Feb 2010

1 answer

97 views

Question: Virtualization and Column Header Caption Modification

Hello,

I've added some code to my grid's double click event so if a cell is double clicked the column header's caption will be appended with (*). The problem I having occurs when I scroll to the right and than double click the column caption is not modified. If I scroll to right a couple of times and than scroll back to where I double clicked the (*) appears in the column caption.

I am almost certain this is caused by Column Virtualization. Is their anyway to fix this so the (*) appears after I've double clicked?

Thanks

GridView

answered on 05 Feb 2010

9 answers

247 views

WPF Demo Crashes while browsing around

Hello, I just installed the demo. It seems to work fine when I click on an item on the tree list but when I click on another item on the tree list, it crashes. It always crashes when I select my second item but the first item loads fine.

Here's a screenshot: http://img291.imageshack.us/img291/7963/crashwi6.jpg

General Discussions

answered on 05 Feb 2010

2 answers

125 views

Binding a collection to GridViewDataColumn

Hello
I'm binding a IList<BusinessObject> to the GridViewDataColumn through a converter.
Code snippet:

                          <telerik:GridViewDataColumn
                                                        Header="Classes"
                                                        Width="15*"
                                                        UniqueName="AuthorisationClasses"
                                                        DataMemberBinding="{Binding AuthorisationClasses, Converter={StaticResource AuthorisationClassesListConverter}}"

The view gets updated dynamically if I make the AuthorisationClasses an ObservableCollection. I was wondering if I could make the view update dynamically without making it an ObservableCollection. The reason being, AuthorisationClasses is a business entity and all the business entites in our solution are of type List<T>.
Thanks in advance

Regards
Binu

GridView

answered on 05 Feb 2010

4 answers

104 views

Bug: CheckBoxes on Grid turn to True or False

Hello,

I several checkbox columns on my grid and every once in a while a checkbox in one of the rows turns to the word True or False.

Usually when I scroll up or down it will change back to a checkbox but sometimes it won't and when I click on the checkbox that's changed the cell is protected. I have to close the app down.

GridView

answered on 04 Feb 2010

2 answers

271 views

MaxLength and CharacterCasing

When the RadComboBox is in IsEditable mode, how do I set the MaxLength and CharacterCasing properties of the TextBox used for entering data?

ComboBox

answered on 04 Feb 2010

10 answers

270 views

Styling the PaneHeader in Blend

Hello,

The moment I try to edit the PaneHeader Style through Blend (Edit Style >create a copy), after putting the PaneHeader WPF component in a window.xaml, it returns "invalid xaml".. see screenshot.

I would like to make them blue, but have a hard time with the theming process.

would you have a custom colour theming of the Radpane working sample as described in the help documentation ?

Cheers

Docking

answered on 04 Feb 2010

3 answers

109 views

More PanelBar commanding

Hi, Im using Prism + Wpf and trying to get the commanding to work on a button i have placed in the panel bar using a datatemplete. Here is a copy of the datatemplate:

<Button Width="140" Height="25" Margin="2"

Tag="{Binding Tag}"

Content="{Binding Title}"

ToolTip="{Binding Description}"

commands:Click.Command="{Binding NavigationBarClickCommand}"

commands:Click.CommandParameter="{Binding Tag}"/>

</StackPanel>

</DataTemplate>

Is this possible, at the moment my command is never getting fired. Or should I be using a different approach?

Thanks, Mark

PanelBar

answered on 04 Feb 2010

3 answers

203 views

3D-Chart crashes but 2D works...

Hi,

i try to render WPF content with telerik chart-controls in VB6. This is possible if you are using the Microsoft Interop Forms Toolkit (http://msdn.microsoft.com/en-us/vbasic/bb419144.aspx). If i'm using the 2D controls everiting is fine. But if I switch to 3D I get a OutOfMemoryException or NullReferenceException.

Here is my XAML:

    
            <UserControl x:Class="UserControl1" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                xmlns:charts="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Charting">  
        
                <Grid> 
        
                    <charts:RadChart x:Name="MyChart"/>  
        
                </Grid> 
        
            </UserControl>

This is the code-behind from the 2D version:

    
                Public Sub New()  
        
                    ' This call is required by the Windows Form Designer.  
        
                    InitializeComponent()  
        
                    ' Add any initialization after the InitializeComponent() call.  
        
                    MyChart.DefaultSeriesDefinition = New BarSeriesDefinition  
        
                    Dim itemSource As Double() = {5, 9, 17, 10, 11, 3, 12}  
        
                    MyChart.ItemsSource = itemSource  
        
                End Sub

And here is the code-behind from the 3D version:

    
                Public Sub New()  
        
                    ' This call is required by the Windows Form Designer.  
        
                    InitializeComponent()  
        
                    ' Add any initialization after the InitializeComponent() call.  
        
                    MyChart.DefaultSeriesDefinition = New Bar3DSeriesDefinition  
        
                    Dim itemSource As Double() = {5, 9, 17, 10, 11, 3, 12}  
        
                    MyChart.ItemsSource = itemSource  
        
                    AddHandler MyChart.DefaultView.ChartArea.Loaded, AddressOf Me.RadChart_Loaded  
        
                End Sub 
        
                Private Sub RadChart_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs)  
        
                    Dim camera As New CameraExtension  
        
                    camera.SpinAxis = SpinAxis.XY  
        
                    camera.ZoomEnabled = True 
        
                    MyChart.DefaultView.ChartArea.Extensions.Add(camera)  
        
                End Sub

The same code works in a normal .NET-project and also in a WinForms-project on the ElementHost.

Best regards,
Dimi

Chart

answered on 04 Feb 2010