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• MTD mtd3ro backup returns BCH decoding failed

  - by saeed144

  While doing a kernel backup of an mtd (Memory Technology Device) from /dev/mtd/mtd3ro of a TI board gives many "BCH decoding failed", Here are system info #cat /proc/mtd dev: size erasesize name mtd0: 00080000 00020000 "X-Loader" mtd1: 00140000 00020000 "U-Boot" mtd2: 000c0000 00020000 "U-Boot Env" mtd3: 00500000 00020000 "Kernel" mtd4: 1f880000 00020000 "File System" here is the method used, dd if=/dev/mtd/mtd3ro of=/data/local/tmp/mtd3.bin doing a cat also returns the same error, and here is the error, BCH decoding failed BCH decoding failed yes, the destination has enough space ;) tell me what do you think? Thanks

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• Windows Embedded Standard 7 est disponible, Microsoft l'a distribué aux OEMs

  Windows Embedded Standard 7 est disponible, Microsoft l'a distribué aux OEMs Microsoft vient d'annoncer la sortie de Windows Embedded Standard 7, qui intégrera Media Center (pour permettre aux fabricants de développer des produits comme des récepteurs numériques avec un contenu multimédia centralisé.) ainsi que des interfaces multimouvements tactiles et des applications context-aware avec Windows Touch. De plus, le système sera tourné vers le vert avec des API de management de puissance permettant de développer des solutions allant dans le sens de la green IT. Des analystes spécialisés estiment que les parts de marché potentielles pour Microsoft dans le domaine des médias digitaux (magnétoscopes numériques, TVs à écrans plats, etc....

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• Windows Mobile, Embedded Team Up

  Windows Embedded CE and Windows Mobile will be merging Microsoft Windows CE - Windows Mobile - Microsoft - Handhelds - Windows CE

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• Windows Embedded 7 Released to Manufacturing

  Microsoft has updated its embedded operating system to bring it in line with Windows 7 and has new markets in mind with its release.

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• Java SE (6, 7, Embedded )????????????

  - by OTN-J Master

  Java??????????????? ???Java SE 7???????????????????????????????????????????????????? Java SE 7?????10???????????????Java????????????????????????????? ?????????????????????FIX?????????????????????????????????????”??”????????????????????????????????????????????????(????????????????Fix????????????????????????????????) Java SE 7 Update 10 ??????? Java SE 6 Update 38 ??????? Java SE Embedded 7 Update 10 ??????? Java SE Embedded 6 Update 38 ??????? >>???Java???????????  ???????????Java SE 6??2????????????????????????????Java SE 7??????????????Java SE?????????????????? >> ??????? ????Java Developer Newsletter???(??!)???????????!

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• Workaround for UpdateSourceTrigger LostFocus on Silverlight Datagrid?

  - by Dave Lowther

  I have a Silverlight 2 application that validates data OnTabSelectionChanged. Immediately I began wishing that UpdateSourceTrigger allowed more than just LostFocus because if you click the tab without tabbing off of a control the LINQ object is not updated before validation. I worked around the issue for TextBoxes by setting focus to another control and then back OnTextChanged: Private Sub OnTextChanged(ByVal sender As Object, ByVal e As TextChangedEventArgs) txtSetFocus.Focus() sender.Focus() End Sub Now I am trying to accomplish the same sort of hack within a DataGrid. My DataGrid uses DataTemplates generated at runtime for the CellTemplate and CellEditingTemplate. I tried writing the TextChanged="OnTextChanged" into the TextBox in the DataTemplate, but it is not triggered. Anyone have any ideas?

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• Can a Silverlight application authenticate versus a local LDAP/ActiveDirectory Server

  - by caryden

  If I have an externally hosted application (www.outside.com) outside the firewall but users within a company wanted to be able to enable LDAP authentication against their local (behind the firewall) AD server (acting as LDAP) or other LDAP server (call it ldap.inside.com), how would this be done. It seems technically possible in that when a user tried to login to outside.com through a client-side silverlight interface, that the SL app could connect to the outside.com login service and be told to authenticate that user against ldap.inside.com. The SL app would make the calls to ldap.inside.com to authenticate the user. Of course, there is the issue of how the server is notified securely that the client authenticated itself...Has anyone done this?

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• SilverLight 3.0 DataGrid LoadingRow Event

  - by Asim Sajjad

  Following are my Question regarding the LoadingRow event of the Datagrid When will it fires after the Row is bound to the data or after that. As if you debug the Silverlight application then of first execution if you type following code ((System.Windows.Controls.TextBlock)(((System.Windows.Controls.ContentControl)(((DataGridRow)e.Row).Cells[1])).Content)).Text if will return empty string but if your datagrid has scroll (which is in my case , my datagrid has scroll), if you scroll down then the LoadingRow firs again and this time it will return Text on that cell?? why it is not return text on first time and return on second time when i press the scroll bar ??? If I paste above code in the cs file then it will return error 'System.Windows.Controls.DataGridRow' does not contain a definition for 'Cells' and no extension method 'Cells' accepting a first argument of type 'System.Windows.Controls.DataGridRow' could be found (are you missing a using directive or an assembly reference?) Can any one help me in these question thanks in advance,

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• Silverlight DataStateBehavior, initial value not used

  - by JimmySavile

  Hi, I am trying to use the Silverlight DataStateBehavior, it works fine in most cases where I click a button which sets say a 'Selected' Property in the view model to either false or true. The DataStateBehavior then tells the VisualStateManager to go to the relevant state. Like this: <Button...> <i:Interaction.Behaviors> <id:DataStateBehavior Binding="{Binding Selected}" Value="True" TrueState="SelectedVisualState" FalseState="DeselectedVisualState"/> </i:Interaction.Behaviors> </Button> The above works fine. What I am trying to do though is to get it to set the correct state when the application loads, if I were to set the 'Selected' property on the view model to true by default I wouldn't see any changes in the UI until I clicked the button to change the viewmodel property. I know there are several classes involved with the DataState stuff including: BindingListener.cs ConverterHelper.cs DataStateBehavior.cs DataStateSwitchBehavior.cs DataTrigger.cs Any clues would be good, Thanks

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• Way to concat strings when using binding in Silverlight

  - by Artur

  I wonder if there is a way of concating two strings in Silverlight inside xaml file. I have a DataGrid where one of the columns is 'Default Contact' and I would like to represent data in there as first and last name. <sdk:DataGridTextColumn Header="Default Contact" Binding="{Binding Path=DefaultContact.FirstName}" /> I was thinking about something like: Binding="{Binding Path=DefaultContact.FirstName + " " + DefaultContact.LasttName}" But this doesn't work. I don't even know if this is possible to achieve. Seems like really basic thing so I hope it is supported in some way. Any help would be greatly appreciated.

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• Page navigation in silverlight 4 using MVVM pattern

  - by Archie

  Hello, I have a a navigation application developed in Silverlight 4. It has a main page which contains a frame. I load a particualr view in that frame and I know that I can use NavigationService to navigate to other page which would be loaded in the same frame. But my question is how it can be done using MVVM? To get the frame do I need to pass the reference of the page? Also, as per my knowledge one view is not aware of any other views. So what is the best way to make them aware of each other? I have heard of Controller and Mediator but how shall I implement them so as to get the Frame of the mainpage? It would be very helpful if anyone can give me the example or probably sample code for this. Thanks in advance.

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• FloatableWindow resizes Grid in Silverlight

  - by Ben

  I'm trying to use Tim Heuer's FloatableWindow control for a non-modal options window in my Silverlight application. However, I'm running into a problem with the FloatableWindow resizing it's parent grid when it opens. For example, before I open the window the application looks like this: But after opening the window, the first row of the grid expands: I'm currently setting FloatableWindow.ParentLayoutRoot to the LayoutRoot grid in MainPage.xaml. Is this the right thing to do? How can I prevent the grid from resizing when the FloatableWindow opens?

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• SelectionChanged event binding in Silverlight+MVVM-Light

  - by Budda

  The handler of the "SelectionChanged" event of the ComboBox control has the following signature: void SelectionChangedMethod(object sender, SelectionChangedEventArgs e) How to bind to that property under Silverlight 4 and MVVM-Light to the corresponding method of the ViewModel object? As far as I know, I need to do something like this: public void Changed(Object obj, SelectionChangedEventArgs e) { // .... implement logic here } RelayCommand<Object, SelectionChangedEventArgs> _command; public ICommand ObjectSelectionChanged { get { if (_command == null) { _command = new RelayCommand<Object, SelectionChangedEventArgs>(Changed); } return _command; } } The problem is that RelayCommand class in the MVVM-Light framework doesn't support 2 generic parameters... Is there any solution or workaround for this case? How bind control event to the method with 2 parameters?

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• Good Silverlight Custom ItemsControl Tutorial

  - by Steve Brouillard

  I'm afraid my Google-Foo is failing me again today. I'm trying to find a good tutorial on creating custom ItemsControls in Silverlight (though I imgaine a WPF version might work as well). I'm trying to create a custom ItemsControl that will be something of a virtualized ListBox. What I'm trying to accomplish isn't really similar enough to the current ListBox control to justify trying to modify the existing control, so I figure a custom one is in order here. I have a vague concept of how to accomplish it, but there are definite holes in my understanding. Thanks in advance

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• Silverlight DataGrid Header Horizontal Alignment

  - by Brandon Montgomery

  I want to change the alignment of a header on a datagrid in Silverlight, and I can't seem to figure out how to do it. Here's what I have so far: <data:DataGridTextColumn Header="#" IsReadOnly="True" ElementStyle="{StaticResource CenterAlignStyle}" Binding="{Binding OutlineNumber, Mode=OneWay}" > <data:DataGridTextColumn.HeaderStyle> <Style TargetType="prim:DataGridColumnHeader"> <Setter Property="HorizontalAlignment" Value="Center"/> </Style> </data:DataGridTextColumn.HeaderStyle> </data:DataGridTextColumn> No matter what I try, I can't seem to change the default alignment, which appears to be "left."

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• Custom Fill Property on PathGeometry in Silverlight

  - by Otaku

  I've been looking at (and getting confused by) Dependency Properties - I'm not sure if this is what I need or if there is something else. I'm looking to something very specific with <Path.Data/> children in Silverlight, in particular <PathGeometry/>, <EllipseGeometry/>, etc. While the <Path/> element has a .Fill property, I'd like to add a .Fill property to any of it's Geometries, meaning it's a different color from it's parent. It could be a <SolidColorBrush/> or <LinearGradientBrush/> color, or a percentage of the parent color (like 20% darker than <Path.Fill/>. Is this possible? Is this a dependency property? How would <RectangleGeometry/>, for example, know that I am trying to fill it with a color? How would I get started? (adding WPF as a tag too as someone who knows WPF may be able to help)

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• How to download media content on demand and reuse from browser cache in silverlight

  - by Andrew

  Hi. I have a problem with simple silverlight app, this app has a couple of buttons, each button sets mediaelement source to a short mp3 file and plays it, my problem is that when i press the same button second time it re-downloads mp3 file again but i think it shouldn't, instead it should use a copy of browser cached mp3 file that was downloaded when a button was pressed for the first time. I'm using sl4 and links in mediaelement are just simple uri's, i need to make it working in this way that when some mp3 was downloaded it will be cached on the client browser and further click on button will use a cached version of file instead of downloading it again and wasting my bandwidth. Any ideas ?

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• IPhone like scrolling on Silverlight ListBox

  - by Larsi

  Hi! I need a listbox with IPhone-like functionality for Silverlight. That is, animated scrolling, and click and drag to scroll. Scrolling will continue a bit after the mouse up event based on the "speed" of the dragging. I've search and found no control vendors providing this. So question is how should I build it? I need some hints to get started. There's two parts to this question: Part 1, How to get the animated scrolling of the listbox. Part 2, How to build a "draggable" scrolling, I guess I should put a canvas on top and track the mouseevent, and simulate some physics. Some hints here would have been great. Thanks Larsi.

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• OnVisualChildrenChanged in silverlight?

  - by user275561

  WPF has a method that you can override which is the OnVisualChildrenChanged so when Children are added or removed you know about them. However, it silverlight there is no such method. So how would I go implementing this? I am trying to create a BubbleBreaker type of game and so I have a class that extends the Canvas. The canvas will lay out those said bubbles in a matrix grid. When they pop I need to know to move the bubbles to the left.

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• Edit TabControl template in Silverlight project

  - by philbrowndotcom

  I'm trying to modify the template for the TabControl in my silverlight application. I used Expression Blend to get the Template and copied it into my project. I did this before for Expander and got it to work with a few minor adjustments. The template for TabControl references the ns/assembly "clr-namespace:System.Windows.Controls.Primitives;assembly=System.Windows.Controls" and uses the TabPanel control from it. I can't seem to make a reference to this. I'm using silverlight 3 and .NET 3 Thanks <UserControl.Resources> <ControlTemplate x:Key="mytemplate" TargetType="sdk:TabControl"> <Grid> <VisualStateManager.VisualStateGroups> <VisualStateGroup x:Name="CommonStates"> <VisualStateGroup.Transitions> <VisualTransition GeneratedDuration="0"/> </VisualStateGroup.Transitions> <VisualState x:Name="Normal"/> <VisualState x:Name="Disabled"> <Storyboard> <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="DisabledVisualTop"> <SplineDoubleKeyFrame KeyTime="0" Value="1"/> </DoubleAnimationUsingKeyFrames> <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="DisabledVisualBottom"> <SplineDoubleKeyFrame KeyTime="0" Value="1"/> </DoubleAnimationUsingKeyFrames> <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="DisabledVisualLeft"> <SplineDoubleKeyFrame KeyTime="0" Value="1"/> </DoubleAnimationUsingKeyFrames> <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="DisabledVisualRight"> <SplineDoubleKeyFrame KeyTime="0" Value="1"/> </DoubleAnimationUsingKeyFrames> </Storyboard> </VisualState> </VisualStateGroup> </VisualStateManager.VisualStateGroups> <Grid x:Name="TemplateTop" Visibility="Collapsed"> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition Height="*"/> </Grid.RowDefinitions> <System_Windows_Controls_Primitives:TabPanel x:Name="TabPanelTop" Margin="2,2,2,-1" Canvas.ZIndex="1"/> <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" CornerRadius="0,0,3,3" MinWidth="10" MinHeight="10" Grid.Row="1"> <ContentPresenter x:Name="ContentTop" Cursor="{TemplateBinding Cursor}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalAlignment}"/> </Border> <Border x:Name="DisabledVisualTop" Background="#8CFFFFFF" CornerRadius="0,0,3,3" IsHitTestVisible="False" Opacity="0" Grid.Row="1" Grid.RowSpan="2" Canvas.ZIndex="1"/> </Grid> <Grid x:Name="TemplateBottom" Visibility="Collapsed"> <Grid.RowDefinitions> <RowDefinition Height="*"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <System_Windows_Controls_Primitives:TabPanel x:Name="TabPanelBottom" Margin="2,-1,2,2" Grid.Row="1" Canvas.ZIndex="1"/> <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" CornerRadius="3,3,0,0" MinWidth="10" MinHeight="10"> <ContentPresenter x:Name="ContentBottom" Cursor="{TemplateBinding Cursor}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalAlignment}"/> </Border> <Border x:Name="DisabledVisualBottom" Background="#8CFFFFFF" CornerRadius="3,3,0,0" IsHitTestVisible="False" Opacity="0" Canvas.ZIndex="1"/> </Grid> <Grid x:Name="TemplateLeft" Visibility="Collapsed"> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <System_Windows_Controls_Primitives:TabPanel x:Name="TabPanelLeft" Margin="2,2,-1,2" Canvas.ZIndex="1"/> <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="1" CornerRadius="0,3,3,0" MinWidth="10" MinHeight="10"> <ContentPresenter x:Name="ContentLeft" Cursor="{TemplateBinding Cursor}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalAlignment}"/> </Border> <Border x:Name="DisabledVisualLeft" Background="#8CFFFFFF" Grid.Column="1" CornerRadius="0,3,3,0" IsHitTestVisible="False" Opacity="0" Canvas.ZIndex="1"/> </Grid> <Grid x:Name="TemplateRight" Visibility="Collapsed"> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> <ColumnDefinition Width="Auto"/> </Grid.ColumnDefinitions> <System_Windows_Controls_Primitives:TabPanel x:Name="TabPanelRight" Grid.Column="1" Margin="-1,2,2,2" Canvas.ZIndex="1"/> <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" CornerRadius="3,0,0,3" MinWidth="10" MinHeight="10"> <ContentPresenter x:Name="ContentRight" Cursor="{TemplateBinding Cursor}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalAlignment}"/> </Border> <Border x:Name="DisabledVisualRight" Background="#8CFFFFFF" CornerRadius="3,0,0,3" IsHitTestVisible="False" Margin="0" Opacity="0" Canvas.ZIndex="1"/> </Grid> </Grid> </ControlTemplate> </UserControl.Resources>

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• Silverlight Chat WrapPanel Crash / Bug

  - by Matt

  I've been given the task to create a simple Silverlight chat box for two people. My control must adhere to the following requirements Scrollable Text must wrap if it's too long When a new item / message is added it must scroll that item into view Now I've successfully made a usercontrol to meet these requirements, but I've run into a possible bug / crash that I can't for the life of me fix. I'm looking for either a fix to the bug, or a different approach to creating a scrollable chat control. Here's the code I've been using. We'll start with my XAML for the chat window <ListBox x:Name="lbChatHistory" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" ScrollViewer.VerticalScrollBarVisibility="Visible" ScrollViewer.HorizontalScrollBarVisibility="Disabled" > <ListBox.ItemTemplate> <DataTemplate> <Grid Background="Beige"> <Grid.ColumnDefinitions> <ColumnDefinition Width="70"></ColumnDefinition> <ColumnDefinition Width="Auto"></ColumnDefinition> </Grid.ColumnDefinitions> <TextBlock x:Name="lblPlayer" Foreground="{Binding ForeColor}" Text="{Binding Player}" Grid.Column="0"></TextBlock> <ContentPresenter Grid.Column="1" Width="200" Content="{Binding Message}" /> </Grid> </DataTemplate> </ListBox.ItemTemplate> </ListBox> The idea is to add a new Item to the listbox. The Item (as layed out in the XAML) is a simple 2 column grid. One column for the username, and one column for the message. Now the "items" that I add to the ListBox is a custom class. It has three properties (Player, ForeColor, and Message) that I using binding on within my XAML Player is a string of the current user to display. ForeColor is just a foreground color preference. It helps distinguish the difference between messages. Message is a WrapPanel. I programmatically break the supplied string on the white space for each word. Then for each word, I add a new TextBlock element to the WrapPanel Here is the custom class. public class ChatMessage :DependencyObject, INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; public static DependencyProperty PlayerProperty = DependencyProperty.Register( "Player", typeof( string ), typeof( ChatMessage ), new PropertyMetadata( new PropertyChangedCallback( OnPlayerPropertyChanged ) ) ); public static DependencyProperty MessageProperty = DependencyProperty.Register( "Message", typeof( WrapPanel ), typeof( ChatMessage ), new PropertyMetadata( new PropertyChangedCallback( OnMessagePropertyChanged ) ) ); public static DependencyProperty ForeColorProperty = DependencyProperty.Register( "ForeColor", typeof( SolidColorBrush ), typeof( ChatMessage ), new PropertyMetadata( new PropertyChangedCallback( OnForeColorPropertyChanged ) ) ); private static void OnForeColorPropertyChanged( DependencyObject d, DependencyPropertyChangedEventArgs e ) { ChatMessage c = d as ChatMessage; c.ForeColor = ( SolidColorBrush ) e.NewValue; } public ChatMessage() { Message = new WrapPanel(); ForeColor = new SolidColorBrush( Colors.White ); } private static void OnMessagePropertyChanged( DependencyObject d, DependencyPropertyChangedEventArgs e ) { ChatMessage c = d as ChatMessage; c.Message = ( WrapPanel ) e.NewValue; } private static void OnPlayerPropertyChanged( DependencyObject d, DependencyPropertyChangedEventArgs e ) { ChatMessage c = d as ChatMessage; c.Player = e.NewValue.ToString(); } public SolidColorBrush ForeColor { get { return ( SolidColorBrush ) GetValue( ForeColorProperty ); } set { SetValue( ForeColorProperty, value ); if(PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs( "ForeColor" )); } } public string Player { get { return ( string ) GetValue( PlayerProperty ); } set { SetValue( PlayerProperty, value ); if ( PropertyChanged != null ) PropertyChanged( this, new PropertyChangedEventArgs( "Player" ) ); } } public WrapPanel Message { get { return ( WrapPanel ) GetValue( MessageProperty ); } set { SetValue( MessageProperty, value ); if ( PropertyChanged != null ) PropertyChanged( this, new PropertyChangedEventArgs( "Message" ) ); } } } Lastly I add my items to the ListBox. Here's the simple method. It takes the above ChatMessage class as a parameter public void AddChatItem( ChatMessage msg ) { lbChatHistory.Items.Add( msg ); lbChatHistory.ScrollIntoView( msg ); } Now I've tested this and it all works. The problem I'm getting is when I use the scroll bar. You can scroll down using the side scroll bar or arrow keys, but when you scroll up Silverlight crashes. FireBug returns a ManagedRuntimeError #4004 with a XamlParseException. I'm soo close to having this control work, I can taste it! Any thoughts on what I should do or change? Is there a better approach than the one I've taken? Thanks in advance. UPDATE I've found an alternative solution using a ScrollViewer and an ItemsControl instead of a ListBox control. For the most part it's stable.

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• TimeoutException in simultaneous calls to WCF services from Silverlight application

  - by Alexander K.

  Analysing log files I've noticed that ~1% of service calls ended with TimeoutException on the Silverlight client side. The services (wcf) are quite simple and do not perform long computations. According the log all calls to the services are always processed in less that 1 sec (even when TimeoutException is occurred on the client!), so it is not server timeout. So what is wrong? Can it be configuration or network problem? How can I avoid it? What additional logging information can be helpful for localizing this issue? The only one workaround I've thought up is to retry service calls after timeout. I will appreciate any help on this issue! Update: On startup the application performs 17 service calls and 12 of them simultaneously (may it be cause of failure?). Update: WCF log has not contained useful information about this issue. It seems some service calls do not reach the server side.

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• How to Prevent SelectionChange a Silverlight DataGrid

  - by Matt Eland

  I'm using a Silverlight 3 DataGrid control and have set the SelectionMode to Extended. The DataGrid takes care of managing the extended selection for me in an almost perfect manner out of the box, but a key piece of the logic is interfering with me. I have a cell that can function as a drag and drop thumb and initiate a drag operation but users want to do a series of shift or control clicks to set a selection followed by a click and drag on one of the selected rows to initiate the drag. The problem is that the click and drag at the end of this series causes the selection to be set to only the row that was clicked. I've poked around for ways of conditionally preventing the DataGrid from changing selection, but can't seem to find anything that works. Does anyone have any ideas for preventing selection from changing?

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• Disable cache in Silverlight HttpWebRequest

  - by synergetic

  My Silverlight4 app is hosted in ASP.NET MVC 2 web application. I do web request through HttpWebRequest class but it gives back a result previously cached. How to disable this caching behavior? There are some links which talks about HttpWebRequest in .NET but Silverlight HttpWebrequest is different. Someone suggested to add unique dummy query string on every web request, but I'd prefer more elegant solution. I also tried the following, but it didn't work: _myHttpWebRequest.BeginGetRequestStream(new AsyncCallback(BeginRequest), new Guid()); In fact, by setting browser history settings it is possible to disable caching. See the following link: http://stackoverflow.com/questions/3027145/asp-net-mvc-with-sql-server-backend-returns-old-data-when-query-is-executed But asking a user to change browser settings is not an option for me.

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• How can I center a Silverlight DataGridTemplateColumn header?

  - by Mike Pateras

  I want to center the header on a Silverlight DataGridTemplateColumn. The following code gets me most of the way there: DataGridTemplateColumn column = new DataGridTemplateColumn(); column.CellTemplate = Resources[templateName] as DataTemplate; column.Header = headerName; column.HeaderStyle = new Style { TargetType = typeof(DataGridColumnHeader) }; column.HeaderStyle.Setters.Add(new Setter(DataGridColumnHeader.HorizontalAlignmentProperty, HorizontalAlignment.Center)); The header is, indeed, centered, but if the column is expanded, the header doesn't stretch. It just remains it's original width, leaving white gaps on either side of it, which looks terrible. What is the proper way to center the column header, such that it still occupies the full width?

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