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[Solved] CrossAppDomainMarshaledException?

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GridView

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Tim asked on 23 Oct 2009, 12:32 PM

I am seeing an odd exception which closes my browser window.

    
            System.CrossAppDomainMarshaledException was unhandled 
        
            Message: System.NullReferenceException: Object reference not set to an instance of an object. 
        
               at AutoVirt.Ui.Client.App.Application_UnhandledException(Object sender, ApplicationUnhandledExceptionEventArgs e) 
        
               at MS.Internal.Error.CallApplicationUEHandler(Exception e) 
        
               at MS.Internal.Error.CallAUEHandler(UInt32 hr, UInt32& bIsHandled)

I took an example from your demos here: http://demos.telerik.com/silverlight/#GridView/RowDetails and came up with the following:

    
            <Grid.Resources> 
        
              <Resources:PublicStringResources x:Key="i18n"/> 
        
                <DataTemplate x:Key="RowDetailsTemplate"> 
        
                  <Grid Background="White"> 
        
                    <Grid.RowDefinitions> 
        
                      <RowDefinition Height="Auto"/> 
        
                    </Grid.RowDefinitions> 
        
                    <TextBlock Margin="3,7,3,7" TextWrapping="Wrap" Text="{Binding Message}"/> 
        
                  </Grid> 
        
                </DataTemplate> 
        
              </Grid.Resources> 
        
            ... 
        
              <TelerikGridView:RadGridView Margin="3" Grid.Row="2" Grid.Column="0" 
        
                ItemsSource="{Binding Path=Data, Mode=OneWay}" 
        
                RowDetailsTemplate="{StaticResource RowDetailsTemplate}" 
        
                RowDetailsVisibilityMode="VisibleWhenSelected" 
        
                AutoGenerateColumns="False"> 
        
            ...

If I change the 4th line from

<Grid Background="White">
to
<Grid Background="White" Width="*">

(or make other changes - this is the simplest case to make it fail) I get the exception above and the app and browser both exit.

Tim

13 Answers, 1 is accepted

answered on 23 Oct 2009, 02:01 PM

    
            <UserControl x:Class="SilverlightApplication6.MainPage" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:Controls="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"  
        
                mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480"> 
        
                <Grid x:Name="LayoutRoot"> 
        
                    <Grid.Resources> 
        
                        <DataTemplate x:Key="RowDetailsTemplate"> 
        
                            <!-- Adding the Width="*" causes the app to die --> 
        
                            <Grid Margin="5,0,0,0" Width="*"> 
        
                                <Grid.RowDefinitions> 
        
                                    <RowDefinition Height="Auto"/> 
        
                                </Grid.RowDefinitions> 
        
                                <TextBlock Margin="3,7,3,7" TextWrapping="Wrap" Text="{Binding Message}"/> 
        
                            </Grid> 
        
                        </DataTemplate> 
        
                    </Grid.Resources> 
        
                    <Grid.RowDefinitions> 
        
                        <RowDefinition Height="*"/> 
        
                    </Grid.RowDefinitions> 
        
                    <Controls:RadGridView x:Name="Grid" Margin="3" Grid.Row="2" Grid.Column="0" 
        
                        ScrollMode="RealTime" 
        
                        ItemsSource="{Binding Path=Data, Mode=OneWay}" 
        
                        RowDetailsTemplate="{StaticResource RowDetailsTemplate}" 
        
                        RowDetailsVisibilityMode="VisibleWhenSelected" 
        
                        ColumnsWidthMode="Fill"  AutoGenerateColumns="False"> 
        
                        <Controls:RadGridView.Columns> 
        
                            <Controls:GridViewDataColumn  
        
                                            HeaderText="Name"  
        
                                            UniqueName="Name" Width=".4*" IsReadOnly="True"/> 
        
                            <Controls:GridViewDataColumn  
        
                                            Header="Rank" 
        
                                            UniqueName="Rank" Width=".4*" IsReadOnly="True"/> 
        
                            <Controls:GridViewDataColumn 
        
                                            HeaderText="Status" UniqueName="Status" 
        
                                            Width=".2*" IsReadOnly="True"/> 
        
                        </Controls:RadGridView.Columns> 
        
                    </Controls:RadGridView> 
        
                </Grid> 
        
            </UserControl>

    
            using System; 
        
            using System.Collections.Generic; 
        
            using System.Collections.ObjectModel; 
        
            using System.Linq; 
        
            using System.Net; 
        
            using System.Windows; 
        
            using System.Windows.Controls; 
        
            using System.Windows.Documents; 
        
            using System.Windows.Input; 
        
            using System.Windows.Media; 
        
            using System.Windows.Media.Animation; 
        
            using System.Windows.Shapes; 
        
            namespace SilverlightApplication6 
        
            { 
        
                public partial class MainPage : UserControl 
        
                { 
        
                    public ObservableCollection<RecordData> Data { get; private set; } 
        
                    public MainPage() 
        
                    { 
        
                        Data = new ObservableCollection<RecordData>(); 
        
                        InitializeComponent(); 
        
                        LayoutRoot.DataContext = this; 
        
                        for (int i = 0; i < 100; i++) 
        
                            Data.Add(new RecordData 
        
                                         { 
        
                                             Name = "Tim", 
        
                                             Rank = "Developer", 
        
                                             Message = "All work and no play makes Tim a dull boy", 
        
                                             Status = StatusEnum.maybe 
        
                                         }); 
        
                    } 
        
                } 
        
                public enum StatusEnum 
        
                { 
        
                    yes, no, maybe 
        
                } 
        
                public class RecordData 
        
                { 
        
                    public string Name { get; set; } 
        
                    public string Rank { get; set; } 
        
                    public string Message { get; set; } 
        
                    public StatusEnum Status { get; set; } 
        
                } 
        
            }

answered on 23 Oct 2009, 02:41 PM

Hi Tim,

Now I saw the error. Grid.Width is of type double and you cannot assign "*" to it. You could set it to "Auto", but there is no point, since this is the default value. Simply do not set its Width at all.

Currently, the grid rows are measured with Infinity in order to be able to calculate the horizontal scroll-bar correctly and that is why you will not be able to achieve the width-of-my-container semantics with the current version.

With the Q3 Release we will introduce a property of GridViewDataControl called HorizontalScrollBarVisibility. When it is set to Disabled, the grid rows will be measured with whatever width the grid has. Then you should be able to get the TextBlock wrapping since the width will be a fixed number and not Infinity.

Please, let me know if you have any other questions.

Best wishes,
Ross
the Telerik team

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answered on 23 Oct 2009, 03:45 PM

OK, suppose I wanted to put a status icon and a message in that row. I would do this in a cell using a ControlTemplate, as documented here in many different threads. ControlTemplate is an invalid type for the RowDetailsTemplate property. Is there any way to make this work (using an IValueConverter)?? For the sake of discussion above, assume that the StatusEnum.maybe ought to display a ? icon, and yes a green check, and no a red X... I know how to do this with IValueConverter in a ControlTemplate...

Thanks,
Tim

answered on 26 Oct 2009, 11:14 AM

ticketid-252741-rowdetailswithicon.zip

Hello Tim,

The RowDetailsTemplate is of type DataTemplate as described in the help topic about Row Details.

You can place any control inside this DataTemplate and its DataContext will be the same as the DataContext of its parent row. This is actually the data item associated with the row. Having this in mind, you can bind to any of the data item properties inside your control.

Here is a small example:

<UserControl x:Class="TicketID_252741_RowDetailsWithIcon.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"

xmlns:local="clr-namespace:TicketID_252741_RowDetailsWithIcon"

mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">

<Grid>

<Grid.Resources>

<local:PositionToBrushConverter x:Key="PositionToBrushConverter"/>

<DataTemplate x:Key="PlayerRowDetailsTemplate">

<StackPanel Orientation="Horizontal">

<TextBlock Text="{Binding Name}"/>

<TextBlock Text=" is with number "/>

<TextBlock Text="{Binding Number}"/>

<TextBlock Text=". He plays as a "/>

<TextBlock Text="{Binding Position}"

Foreground="{Binding Position, Converter={StaticResource PositionToBrushConverter}}"/>

<TextBlock Text=" for "/>

<TextBlock Text="{Binding Country}"/>

<TextBlock Text="."/>

</StackPanel>

</DataTemplate>

</Grid.Resources>

<telerik:RadGridView Name="playersGrid"

AutoGenerateColumns="False"

RowDetailsTemplate="{StaticResource PlayerRowDetailsTemplate}"

RowDetailsVisibilityMode="Visible">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Name"

DataMemberBinding="{Binding Name}">

</telerik:GridViewDataColumn>

<telerik:GridViewDataColumn Header="Number"

DataMemberBinding="{Binding Number}">

</telerik:GridViewDataColumn>

<telerik:GridViewDataColumn Header="Position"

DataMemberBinding="{Binding Position}">

</telerik:GridViewDataColumn>

<telerik:GridViewDataColumn Header="Country"

DataMemberBinding="{Binding Country}">

</telerik:GridViewDataColumn>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</Grid>

</UserControl>

using System;

using System.Globalization;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Ink;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

namespace TicketID_252741_RowDetailsWithIcon

{

public class PositionToBrushConverter : IValueConverter

{

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

{

switch((Position)value)

{

case Position.GK:

return new SolidColorBrush(Colors.Yellow);

case Position.DF:

return new SolidColorBrush(Colors.Cyan);

case Position.MF:

return new SolidColorBrush(Colors.Orange);

case Position.FW:

return new SolidColorBrush(Colors.Red);

default:

return new SolidColorBrush(Colors.Black);

}

public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)

{

throw new NotImplementedException();

}

I have attached the sample project. You can create any icon in the row details and bind its color to the enum by using a converter similar to mine.

To learn more about row details you can check our this example and my blog post.

I hope this helps.

Sincerely yours,
Ross
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Watch a video on how to optimize your support resource searches and check out more tips on the blogs.

Accepted