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  • Silverlight Data Binding for Collection in Stack Panel

    - by Blake Blackwell
    I'm new to Silverlight, so I don't have a complete grasp of all the controls at my disposal. What I would like to do is use databinding and a view model to maintain a collection of items. Here is some mock code for what I'd like to do: Model public class MyItem { public string DisplayText { get; set; } public bool Enabled { get; set; } } ViewModel public class MyViewModel : INotifyPropertyChanged { private ObservableCollection<MyItem> _myItems = new ObservableCollection<MyItem>(); public ObservableCollection<MyItem> MyItems { get { return _myItems; } set { _myItems = value NotifyPropertyChanged(this, "MyItems"); } } } View <Grid x:Name="LayoutRoot" Background="White"> <StackPanel ItemsSource="{Binding MyItems}"> <StackPanel Orientation="Horizontal"> <CheckBox "{Binding Enabled, Mode=TwoWay}"></CheckBox> <TextBlock Text="{Binding DisplayText, Mode=TwoWay}" /> </StackPanel> </StackPanel> </Grid> So my end goal would be that every time I add another MyItem to the MyItems collection it would create a new StackPanel with checkbox and textblock. I don't have to use a stack panel but just thought I'd use that for this sample.

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  • Binding not working correctly in silverlight

    - by Harsh Maurya
    I am using a DataGrid in my silverlight project which contains a custom checkbox column. I have binded its command property with a property of my ViewModel class. Now, the problem is that I want to send the "selected item" of DataGrid through the command paramter for which I have written the following code : <sdk:DataGrid AutoGenerateColumns="False" Margin="10,0,10,0" Name="dataGridOrders" ItemsSource="{Binding OrderList}" Height="190"> <sdk:DataGrid.Columns> <sdk:DataGridTemplateColumn Header="Select"> <sdk:DataGridTemplateColumn.CellTemplate> <DataTemplate> <CheckBox> <is:Interaction.Triggers> <is:EventTrigger EventName="Checked"> <is:InvokeCommandAction Command="{Binding Source={StaticResource ExecutionTraderHomePageVM},Path=OrderSelectedCommand,Mode=TwoWay}" CommandParameter="{Binding ElementName=dataGridOrders,Path=SelectedItem}" /> </is:EventTrigger> <is:EventTrigger EventName="Unchecked"> <is:InvokeCommandAction Command="{Binding Source={StaticResource ExecutionTraderHomePageVM},Path=OrderSelectedCommand,Mode=TwoWay}" CommandParameter="{Binding ElementName=dataGridOrders,Path=SelectedItem}" /> </is:EventTrigger> </is:Interaction.Triggers> </CheckBox> But I am always getting null in the parameter of my command's execute method. I have tried with other properties of DataGrid such as Width, ActualHeight e.t.c. but of no use. What am I missing here ?

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  • Silverlight 4: StackPanel doesn't resize, when content gets more narrow

    - by Aaginor
    I am using Silverlight 4 with Blend 4. I have a (horizontal) stackpanel that includes some TextBoxes and a Button. The stackpanel is set to stretch to the size that the content uses. The TextBoxes are on autosize too. When I add text to the Textboxes, the textbox size grows and the stackpanel grows too. So far so good. When I remove text from the textboxes, the textbox size shrinks (as excepted), but the stackpanel size doesn't. Is there any trick to make the stackpanel change size, when the content (textboxes) getting smaller? Thanks in advance, Frank Here is the XAML for the UserControl: <Grid x:Name="LayoutRoot"> <StackPanel x:Name="StackPanelBorder" Orientation="Horizontal"> <TextBox x:Name="TextBoxCharacteristicName" TextWrapping="Wrap" Text="Tex"> </TextBox> <TextBox x:Name="TextBoxSep" TextWrapping="Wrap" Text="=" IsReadOnly="True"> </TextBox> <Button x:Name="ButtonRemove" Content="-" Click="ButtonAddOrRemove_Click"> </Button> </StackPanel> </Grid>

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  • Conditional execution of EventTriggers in Silverlight 3

    - by Jason
    I'm currently working on the UI of a Silverlight application and need to be able to change the visual state of a control to one of two possible states based on it's current state when handling the same event trigger. For example: I have a control that sits partially in a clipping path, when I click the visible part of the control I want to change the state to "visible" and if I click it again when it is in its "visible" state I want to change to the "hidden" state. Example XAML: <i:Interaction.Triggers> <i:EventTrigger EventName="MouseLeftButtonUp"> <ic:GoToStateAction StateName="Visible"/> <ic:GoToStateAction StateName="Hidden"/> </i:EventTrigger> </i:Interaction.Triggers> Where "i" is "System.Windows.Interactivity;assembly=System.Windows.Interactivity" and "ic" is "Microsoft.Expression.Interactivity.Core;assembly=Microsoft.Expression.Interactions". I'm currently working in Expression Blend 3 and would prefer to have a XAML only solution but am not opposed to coding this if it is completely necessary. I have tried recording a change in the target state name in Blend but this did not work. Any thoughts on this?

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  • How can I get the mouse wheel to work correctly with the Silverlight 4 ScrollViewer

    - by Ian Oakes
    When I use the following xaml in Silverlight 4, the ScrollViewer will not recognize the mouse wheel unless I click once on the scroll bar thumb, and keep the mouse over the scroll bar, while turning the mouse wheel. <Grid x:Name="LayoutRoot" Background="White"> <ScrollViewer> <StackPanel Name="stackPanel1"> <Button Content="Button 1" Width="150" /> <Button Content="Button 2" Width="150" Margin="0,20,0,0" /> <Button Content="Button 3" Width="150" Margin="0,20,0,0" /> <Button Content="Button 4" Width="150" Margin="0,20,0,0" /> <Button Content="Button 5" Width="150" Margin="0,20,0,0" /> <Button Content="Button 6" Width="150" Margin="0,20,0,0" /> <Button Content="Button 7" Width="150" Margin="0,20,0,0" /> </StackPanel> </ScrollViewer> </Grid> Has anyone else experience this, and is there any work around?

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  • How to print each object in a collection in a separate page in Silverlight

    - by Ash
    I would like to know if its possible to print each object in a collection in separate pages using Silverlight printing API. Suppose I have a class Label public class Label { public string Address { get; set; } public string Country { get; set; } public string Name { get; set; } public string Town { get; set; } } I can use print API and print like this. private PrintDocument pd; private void PrintButton_Click(object sender, RoutedEventArgs e) { pd.Print("Test Print"); } private void pd_PrintPage(object sender, PrintPageEventArgs e) { Label labelToPrint = new Label() { Name = "Fake Name", Address = "Fake Address", Country = "Fake Country", Town = "Town" }; var printpage = new LabelPrint(); printpage.DataContext = new LabelPrintViewModel(labelToPrint); e.PageVisual = printpage; } LabelPrint Xaml <StackPanel x:Name="LayoutRoot" VerticalAlignment="Center" HorizontalAlignment="Center"> <TextBlock Text="{Binding Name}" /> <TextBlock Text="{Binding Address}" /> <TextBlock Text="{Binding Town}" /> <TextBlock Text="{Binding Country}" /> </StackPanel> Now, say I've a collection of Label objects, List<Label> labels = new List<Label>() { labelToPrint, labelToPrint, labelToPrint, labelToPrint }; How can I print each object in the list in separate pages ? Thanks for any suggestions ..

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  • Silverlight Image Data Binding

    - by Alexander
    I am new to Silverlight, and have an issue with binding. I have a class ItemsManager, that has inside its scope another class Item. class ItemsManager { ... class Item : INotifyPropertyChanged { ... private BitmapImage bitmapSource; public BitmapImage BitmapSource { get { return bitmapSource; } set { bitmapSource = value; if(PropertyChanged != null )PropertyChanged("BitmapSource") } } } } I do the following in code to test binding: { ItemsManager.Instance.AddItem("123"); //Items manager started downloading item visual //part (in my case bitmap image png) Binding b = new Binding("Source"); b.Source = ItemsManager.Instance.GetItem("123").BitmapSource; b.BindsDirectlyToSource = true; Image img = new Image(); img.SetBinding(Image.SourceProperty, b); img.Width = (double)100.0; img.Height = (double)100.0; LayoutRoot.Children.Add(img); } Once image is loaded, image doesn't appear. Though, if I set directly after image has been loaded its source, it displays well. I also noticed that PropertyChanged("BitmapSource") never fires, because PropertyChanged is null, like Image never binded to it. I am looking forward to hearing from you!

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  • Limiting the width of a TextBlock in Silverlight

    - by Druzil
    The obvious MaxWidth gets ignored and the text in the "DisplayBox" TextBlock displays the whole text even if this text continues past the parent container controls (to the edge of the silverlight area. <win:HierarchicalDataTemplate x:Key="hierarchicalTemplate" ItemsSource="{Binding _children}"> <Border BorderThickness="0" BorderBrush="Orange" HorizontalAlignment="Stretch" Background="{Binding Converter={StaticResource BackgroundConverter}}"> <toolkit:DockPanel LastChildFill="True" Width="{Binding HeirarchyLevel, Converter={StaticResource WidthConverter}}" Height="20"> <Canvas toolkit:DockPanel.Dock="Right" Width="20" MouseLeftButtonUp="Arrow_MouseLeftButtonDown"> <Rectangle Width="20" Height="20" Fill="Transparent" /> <Line Stroke="Black" X1="5" Y1="10" X2="17" Y2="10" /> <Line Stroke="Black" X1="11" Y1="5" X2="17" Y2="10" /> <Line Stroke="Black" X1="11" Y1="15" X2="17" Y2="10" /> </Canvas> <Ellipse Canvas.Top="5" Width="10" Height="10" Fill="Green" toolkit:DockPanel.Dock="Right" MouseLeftButtonDown="Ellipse_MouseLeftButtonDown" /> <Canvas Width="Auto" Loaded="TextArea_Loaded"> <TextBlock Name="DisplayBox" FontFamily="Arial" FontSize="17" Foreground="Black" Width="Auto" Text="{Binding TaskName}" MouseLeftButtonUp="TextBlock_MouseLeftButtonUp" /> <TextBox Name="EditBox" FontFamily="Arial" FontSize="10" Foreground="Black" Height="20" Text="{Binding TaskName}" Visibility="Collapsed" LostFocus="TextBox_LostFocus" /> <Line Stroke="Black" X1="0" Y1="10" X2="202" Y2="10" Width="Auto" /> </Canvas> </toolkit:DockPanel> </Border> </win:HierarchicalDataTemplate>

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  • Silverlight Timer problem

    - by jose
    Hello, I am developing a Silverlight application with custom animations. I want to update the variable animationCounter every 1 milissecond, so that in one second the value is 1000. I've tried DispatcherTimer and System.Threading.Timer. this way: DispatcherTimer timer = new DispatcherTimer(); (...) timer.Interval = new TimeSpan(0, 0, 0, 0, 1); timer.Tick += new EventHandler(timer_Tick); (...) (...) void timer_Tick(object sender, EventArgs e) { animationCounter++; Dispatcher.BeginInvoke(() => txtAnimationCounter.Text = animationCounter.ToString()); } with System.Threading.Timer System.Threading timer = null; timer = new System.Threading.Timer(UpdateAnimationCounter, 0, 1); void UpdateAnimationCounter(object state) { animationCounter++; Dispatcher.BeginInvoke(() => txtAnimationCounter.Text = animationCounter.ToString()); } Both of them are setting AnimationCounter around 100 in one second. Should be 1000. I don't know why. Is there anything I'm missing. Thanks

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  • Silverlight logging out causes "Object reference not set to an instance"

    - by Alex
    I am using the Silverlight 4 Business Application Template. I've created a DomainDataSource in XAML like so: <riaControls:DomainDataSource x:Name="LogData" QueryName="GetLogs" AutoLoad="True" LoadSize="20" > <riaControls:DomainDataSource.DomainContext> <local:AdminDomainContext /> </riaControls:DomainDataSource.DomainContext> <riaControls:DomainDataSource.QueryParameters> <riaControls:Parameter ParameterName="UserLoginID" Value="{Binding Path=User.UserLoginID, Source={StaticResource WebContext}}" /> </riaControls:DomainDataSource.QueryParameters> </riaControls:DomainDataSource> The problem I'm experiencing is that whenever I log out, I get: Load operation failed for query 'GetLogs'. Object reference not set to an instance of an object. I assume that because I've logged out, User.UserLoginID is now null and is causing the exception. So... anybody know a good way for me to solve this? I don't really want to set the QueryParameter programmatically.

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  • Silverlight: Button template with texttrimming cut off

    - by dex3703
    I'm replacing the default Button template's ContentPresenter with a TextBlock, so the text can be trimmed when it's too long. Works fine in WPF. In Silverlight the text gets pushed to one edge and cut off on the left, even when there's space on the right: Template is nothing special, just replaced the ContentPresenter with the TextBlock: <Border x:Name="bdrBackground" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" /> <Rectangle x:Name="rectMouseOverVisualElement" Opacity="0"> <Rectangle.Fill> <SolidColorBrush x:Name="rectMouseOverColor" Color="{StaticResource MouseOverItemBgColor}"/> </Rectangle.Fill> </Rectangle> <Rectangle x:Name="rectPressedVisualElement" Opacity="0" Style="{TemplateBinding Tag}"/> <TextBlock x:Name="textblock" Text="{TemplateBinding Content}" TextTrimming="WordEllipsis" TextWrapping="NoWrap" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/> <Rectangle x:Name="rectDisabledVisualElement" Opacity="0" Style="{StaticResource RectangleDisabledStyle}"/> <Rectangle x:Name="rectFocusVisualElement" Opacity="0" Style="{StaticResource RectangleFocusStyle}"/> </Grid> </ControlTemplate> How do I fix this? More info: With the latest comment about HorizontalAlignment, it's clear that SL's implementation of TextTrimming differs from WPF's. In SL, TextTrimming only really works if the text is aligned left. SL isn't smart enough to align the text the way WPF does. For instance: WPF button: SL button with the textblock horizontalalignment = left: SL button with textblock horizontalalignment = center:

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  • WCF operationcontract with List type unavailable in (Silverlight) client

    - by Dave
    This is the first time I have tried returning a List of data to a Silverlight client, so I'm having trouble getting the client to recognize this operationcontract. All others are fine. I have a method on the server called ReadOwFileData that needs to return a List. ReadOwFileDataCompletedEventArgs shows up in the Object Browser in the client, but not ReadOwFileDataAsync. What I want is similar to the tutorial here. The Dictionary collection type on the client is set to System.Collections.Generic.List. I tried deleting and recreating the service reference. Web.Config on the server is using basicHttpBinding. Here is the operationcontract on the server: [OperationContract] public List<OwFileData> ReadOwFileData(string OrderID) { DataClasses1DataContext db = new DataClasses1DataContext(); var dFileData = (from p in db.OwFileDatas where p.OrderID == OrderID select p).ToList(); List<OwFileData> x = new List<OwFileData>(dFileData); return x; } Incidently, this works fine: [OperationContract] public Customer GetShippingAndContactInfo(string login, string ordernum) { DataClasses1DataContext db = new DataClasses1DataContext(); Customer dInfo = (from p in db.Customers where p.Login == login select p).Single(); return dInfo; } I would like to read this data in the client and place it into an object I created called ObservableCollection. But that obviously can't happen until the client can see the method on the server. I do not know if this is an acceptable start, but this is what is on the client so far. The ReadOwFileDataAsync object is null: void populatefilesReceivedDataSource(string OrderID) { ArtUpload.ServiceReference1.UploadServiceClient client = new ArtUpload.ServiceReference1.UploadServiceClient(); var myList = client.ReadOwFileDataAsync(OrderID); // can I just itterate thru the list instead of 'binding' }

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  • Accessing my own datalayer using RIA & Silverlight

    - by Norsten
    Is it possible for me to connect to my own data provide via WCF RIA services? I've created a small datalayer that connnects to DynamicAX datasource. I would like to use Silverlight 4 & RIA service to access that datalayer. At it's most basic -I've done the following... 1) I've added an empty domainclass to the webproject and in that class I created a simple method to return a string... [EnableClientAccess()] public class ProjectService : DomainService { public string TestViaRIA() { return "Hello!"; } } 2) I then added reference to the web project in my silvelight class and created a bit of code to try and invoke the method... using ProjectApp.Web; namespace ProjectApp.Views { public partial class ProjectControl : UserControl { public ProjectControl() { InitializeComponent(); ProjectContext ctx = new ProjectContext(); var x = ctx.TestViaRIA(); testTextBox.Text = x.ToString(); } } } the returned value is "{System.ServiceModel.DomainServices.Client.InvokeOperation}". I'm obviously doing something wrong here and I would appreciate some guidance on how I can achive this. Thanks in advance

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  • Scroll to item in listview in Silverlight 3.

    - by the empirical programmer
    I have a silverlight 3 app with a textbox on the main window and a childwindow that has a list of all the potential textbox values. When I open that childwindow I want it to scroll to the correct one in the list. I'm trying to do this with the code below...using the ScrollIntoView. It was not working at all until I add the UpdateLayerout(). However it does not seem to work all the time. At times it scrolls but not all the way to the item, it is a few items higher than it should be. The listbox is in an Accordion and the list items use a ItemTemplate\DataTemplate, not sure if that effects anything but thought I'd mention it. Any ideas what I'm missing in the code below? What I would like is to scroll the item to the top of the list ....any ideas how to that? (Or any other suggestions on how to code this better) Thanks! for (int index = 0; index < myList.Items.Count; index++) { object obj = myList.Items[index]; var listItem= obj as listItemObject; if (listItemObj != null) { if (string.Compare(listItemObj.id, _PastedInId, StringComparison.InvariantCultureIgnoreCase) == 0) { selectThisIndex = index; scrollToThisItem = obj; } } } myList.SelectedIndex = selectThisIndex; if (scrollToThisItem != null){ myList.UpdateLayout(); myList.ScrollIntoView(scrollToThisItem); }

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  • Silverlight: Why doesn't this binding expression work?

    - by Rosarch
    I'm having difficulty with a binding expression in Silverlight 3 for the Windows Phone 7. <Grid x:Name="LayoutRoot" Background="Transparent"> <controls:Pivot ItemsSource="{Binding SectionViewModels}"> <!-- ... --> <controls:Pivot.ItemTemplate> <DataTemplate> <Grid> <!-- this is the troublesome binding --> <TextBlock Style="{StaticResource disabledText}" Visibility="{Binding ElementName=LayoutRoot, Path=DataContext.NoStoryContent}"> Do you have a network connection? </TextBlock> <!-- ... --> The style, in app.xaml: <Style x:Key="disabledText" TargetType="TextBlock"> <Setter Property="Foreground" Value="{StaticResource PhoneDisabledBrush}" /> <Setter Property="TextWrapping" Value="Wrap" /> <Setter Property="FontSize" Value="{StaticResource PhoneFontSizeLarge}" /> </Style> Code behind: public Visibility NoStoryContent { get { // trivial return value for debugging // no breakpoint here is hit return Visibility.Collapsed; } } public Sections() { InitializeComponent(); LayoutRoot.DataContext = this; } What am I doing wrong here? I suspect I have a mistake in the binding expression, but I'm not sure where.

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  • PDF reviewer in C# (ASP.NET/Silverlight?)

    - by Anders Holmström
    Hi. I'm essentially planning to mimic the comment functions on PDF files, but online. That is; a user should be able to log in and upload a PDF file, and then numerous different users should be able to add comments etc to this same file (and view the file, with comments, online). External libraries are ok. Free obviously preferred, but commercial ones are fine if they provide a lot of the needed functionality. Note that this is meant to be used in a commercial environment. Comments don't necessarily need to be able to be exported from the site. I.e. if the comments are just put as a layer on top of a PDF file (and not in the actual file) that's ok. But obviously the more export functionality the better. I have looked at a few libraries (using the related questions and google) and while I find some that seem to do sort of what I want I'm not sure they are the bee's knees plus I would like to do as much myself as possible. The three basic approaches I've thought of is: Use some sort of native PDF viewing and then just smack down a layer on top of it where you can move around comments etc. Convert PDFs to HTML and work from there. Problem here it would either require proper PDFs (e.g. non-scanned) or really good OCR which seems a bit tedious. Convert PDFs to images and work from there. I'm afraid this will create massive images however. We're talking PDFs that can be hundreds of pages. One option would of course to just display one PDF page (image) at a time. And last - should I look at Silverlight for this or go with ASP.NET? Ideas and input concerning this project are much appreciated.

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  • Why do different versions of Silverlight assemblies have the same version number?

    - by Simon
    Why do different versions of Silverlight assemblies have the same version number? Location: ...\Silverlight\v3.0\System.Core.dll Name: System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e Location: ...\Silverlight\v4.0\System.Core.dll Name: System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e Location: ...\Silverlight\v4.0\Profile\WindowsPhone\System.Core.dll Name: System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e While standard .net has different version numbers Location: ...\Framework\v4.0.30319\System.dll Name: System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Location: ...\Framework\v2.0.50727\System.dll Name: System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089

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  • Silverlight and Unexpected Font Sizes

    - by Eric J.
    Someone please teach me to fish here... I'm just learning Silverlight and have ran into a few situations where the font size actually used is drastically different than I would expect. There's probably something conceptual that I'm missing. Case A In one instance, I have defined a user control that presents a Label to show text. If one clicks on the label, the label (that is in a stack panel, in the user control) is replaced with a TextBox. When used at the top of a page (as in the example below with lblName) the label text is very small (around 8 points). When clicked on, the text box that replaces the label uses the specified fonts size. That same user control, used in different parts of the app, uses the same font for Label and TextBox. <Grid x:Name="LayoutRoot" Background="White"> <Grid.RowDefinitions> <RowDefinition Height="33" /> <RowDefinition Height="267*" /> </Grid.RowDefinitions> <StackPanel Height="Auto" HorizontalAlignment="Left" Name="stackPanel" VerticalAlignment="Top" Width="Auto" Grid.Row="1" /> <my:EditLabel Height="33" HorizontalAlignment="Left" x:Name="lblName" VerticalAlignment="Top" Width="Auto" FlexText="{Binding Name, Mode=TwoWay}" FontSize="20" MinHeight="24" /> </Grid> Case B I'm using the LiquidMenu.Menu control to pop up a menu when a button is pressed. The font looks huge compared to the rest of my page (maybe 36 points?). I tried forcing it to a very small by explicitly setting it to 8pt, but that had no effect. <Grid x:Name="LayoutRoot" Background="{x:Null}"> <StackPanel x:Name="labelStackPanel" Orientation="Horizontal"> <TextBlock Height="24" HorizontalAlignment="Left" Name="labelText" VerticalAlignment="Top" Width="200" Text="(Value Goes Here)" /> </StackPanel> <liquidMenu:Menu x:Name="popupMenu" Canvas.Left="40" Canvas.Top="40" ItemSelected="MenuList_ItemSelected" Visibility="Collapsed" Height="Auto" FontSize="8"> <liquidMenu:MenuItem ID="delete" Icon="Images/Delete10.png" Text="Delete" Shortcut="Del" /> <liquidMenu:MenuItem ID="exclusive" Icon="" Text="Exclusive" Shortcut="Ctrl+E" /> <liquidMenu:MenuItem ID="properties" Icon="" Text="Properties" Shortcut="Ctrl+P" /> </liquidMenu:Menu> </Grid> Answers to these specific issues are great, a new way to think about this type of issue so that I understand how to control font size is better.

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  • CheckBox Command Behaviors for Silverlight MVVM Pattern

    - by Blake Blackwell
    I am trying to detect when an item is checked, and which item is checked in a ListBox using Silverlight 4 and the Prism framework. I found this example on creating behaviors, and tried to follow it but nothing is happening in the debugger. I have three questions: Why isn't my command executing? How do I determine which item was checked (i.e. pass a command parameter)? How do I debug this? (i.e. where can I put break points to begin stepping into this) Here is my code: View: <ListBox x:Name="MyListBox" ItemsSource="{Binding PanelItems, Mode=TwoWay}"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <CheckBox IsChecked="{Binding Enabled}" my:Checked.Command="{Binding Check}" /> <TextBlock x:Name="DisplayName" Text="{Binding DisplayName}"/> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> ViewModel: public MainPageViewModel() { _panelItems.Add( new PanelItem { Enabled = true, DisplayName = "Test1" } ); Check = new DelegateCommand<object>( itemChecked ); } public void itemChecked( object o ) { //do some stuff } public DelegateCommand<object> Check { get; set; } Behavior Class public class CheckedBehavior : CommandBehaviorBase<CheckBox> { public CheckedBehavior( CheckBox element ) : base( element ) { element.Checked +=new RoutedEventHandler(element_Checked); } void element_Checked( object sender, RoutedEventArgs e ) { base.ExecuteCommand(); } } Command Class public static class Checked { public static ICommand GetCommand( DependencyObject obj ) { return (ICommand) obj.GetValue( CommandProperty ); } public static void SetCommand( DependencyObject obj, ICommand value ) { obj.SetValue( CommandProperty, value ); } public static readonly DependencyProperty CommandProperty = DependencyProperty.RegisterAttached( "Command", typeof( CheckBox ), typeof( Checked ), new PropertyMetadata( OnSetCommandCallback ) ); public static readonly DependencyProperty CheckedCommandBehaviorProperty = DependencyProperty.RegisterAttached( "CheckedCommandBehavior", typeof( CheckedBehavior ), typeof( Checked ), null ); private static void OnSetCommandCallback( DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e ) { CheckBox element = dependencyObject as CheckBox; if( element != null ) { CheckedBehavior behavior = GetOrCreateBehavior( element ); behavior.Command = e.NewValue as ICommand; } } private static CheckedBehavior GetOrCreateBehavior( CheckBox element ) { CheckedBehavior behavior = element.GetValue( CheckedCommandBehaviorProperty ) as CheckedBehavior; if( behavior == null ) { behavior = new CheckedBehavior( element ); element.SetValue( CheckedCommandBehaviorProperty, behavior ); } return behavior; } public static CheckedBehavior GetCheckCommandBehavior( DependencyObject obj ) { return (CheckedBehavior) obj.GetValue( CheckedCommandBehaviorProperty ); } public static void SetCheckCommandBehavior( DependencyObject obj, CheckedBehavior value ) { obj.SetValue( CheckedCommandBehaviorProperty, value ); } } I used this article to get me started, but I'll readily admit this is over my head.

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  • Binding to a dictionary in Silverlight with INotifyPropertyChanged

    - by rip
    In silverlight, I can not get INotifyPropertyChanged to work like I want it to when binding to a dictionary. In the example below, the page binds to the dictionary okay but when I change the content of one of the textboxes the CustomProperties property setter is not called. The CustomProperties property setter is only called when CustomProperties is set and not when the values within it are set. I am trying to do some validation on the dictionary values and so am looking to run some code when each value within the dictionary is changed. Is there anything I can do here? C# public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); MyEntity ent = new MyEntity(); ent.CustomProperties.Add("Title", "Mr"); ent.CustomProperties.Add("FirstName", "John"); ent.CustomProperties.Add("Name", "Smith"); this.DataContext = ent; } } public class MyEntity : INotifyPropertyChanged { public event PropertyChangedEventHandler System.ComponentModel.INotifyPropertyChanged.PropertyChanged; public delegate void PropertyChangedEventHandler(object sender, System.ComponentModel.PropertyChangedEventArgs e); private Dictionary<string, object> _customProps; public Dictionary<string, object> CustomProperties { get { if (_customProps == null) { _customProps = new Dictionary<string, object>(); } return _customProps; } set { _customProps = value; if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs("CustomProperties")); } } } } VB Partial Public Class MainPage Inherits UserControl Public Sub New() InitializeComponent() Dim ent As New MyEntity ent.CustomProperties.Add("Title", "Mr") ent.CustomProperties.Add("FirstName", "John") ent.CustomProperties.Add("Name", "Smith") Me.DataContext = ent End Sub End Class Public Class MyEntity Implements INotifyPropertyChanged Public Event PropertyChanged(ByVal sender As Object, ByVal e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged Private _customProps As Dictionary(Of String, Object) Public Property CustomProperties As Dictionary(Of String, Object) Get If _customProps Is Nothing Then _customProps = New Dictionary(Of String, Object) End If Return _customProps End Get Set(ByVal value As Dictionary(Of String, Object)) _customProps = value RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs("CustomProperties")) End Set End Property End Class Xaml <TextBox Height="23" Name="TextBox1" Text="{Binding Path=CustomProperties[Title], Mode=TwoWay}" /> <TextBox Height="23" Name="TextBox2" Text="{Binding Path=CustomProperties[FirstName], Mode=TwoWay}" /> <TextBox Height="23" Name="TextBox3" Text="{Binding Path=CustomProperties[Name], Mode=TwoWay}" />

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  • MapItemsControls not updating Silverlight Bing Map

    - by Matt
    I'm using a MapItemsControl to control my Pushpin items within my Bing silverlight map. Right on the page load, I add a new pin programatically, and the pin shows up on the map. However I've now taken it further and I'm adding pins to my datasource via a click on the map. The new pins add to my datasource, but do not show up on the map. Do I need to rebind my datasource to my map control or somehow refresh the datasource? Here's some code <UserControl.Resources> <DataTemplate x:Key="PinData"> <m:Pushpin Location="{Binding Location}" PositionOrigin="BottomCenter" Width="Auto" Height="Auto" Cursor="Hand"> <m:Pushpin.Template> <ControlTemplate> <Grid> <myTestApp:MasterPin DataContext="{Binding}"/> </Grid> </ControlTemplate> </m:Pushpin.Template> </m:Pushpin> </DataTemplate> </UserControl.Resources> <Grid x:Name="LayoutRoot" Background="White"> <m:Map x:Name="myMap" CredentialsProvider="" Mode="Road" ScaleVisibility="Collapsed" > <m:MapItemsControl x:Name="mapItems" ItemTemplate="{StaticResource PinData}"/> </m:Map> </Grid> public partial class Map : UserControl { private List< BasePin > dataSource = new List< BasePin >(); public Map() { InitializeComponent(); _Initialize(); } private void _Initialize() { //this part works and adds a pin to the map dataSource.Add( new BaseSite( -33.881532, 18.440208 ) ); myMap.MouseClick += Map_MouseClick; mapItems.ItemsSource = dataSource; } public void Map_MouseClick(object sender, MapMouseEventArgs e)) { BasePin pin = new BasePin(); pin.Location = myMap.ViewportPointToLocation( e.ViewportPoint ); dataSource.Add( pin ); } }

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  • C# Silverlight - Delay Child Window Load?!

    - by Goober
    The Scenario Currently I have a C# Silverlight Application That uses the domainservice class and the ADO.Net Entity Framework to communicate with my database. I want to load a child window upon clicking a button with some data that I retrieve from a server-side query to the database. The Process The first part of this process involves two load operations to load separate data from 2 tables. The next part of the process involves combining those lists of data to display in a listbox. The Problem The problem with this is that the first two asynchronous load operations haven't returned the data by the time the section of code to combine these lists of data is reached, thus result in a null value exception..... Initial Load Operations To Get The Data: public void LoadAudits(Guid jobID) { var context = new InmZenDomainContext(); var imageLoadOperation = context.Load(context.GetImageByIDQuery(jobID)); imageLoadOperation.Completed += (sender3, e3) => { imageList = ((LoadOperation<InmZen.Web.Image>)sender3).Entities.ToList(); }; var auditLoadOperation = context.Load(context.GetAuditByJobIDQuery(jobID)); auditLoadOperation.Completed += (sender2, e2) => { auditList = ((LoadOperation<Audit>)sender2).Entities.ToList(); }; } I Then Want To Execute This Immediately: IEnumerable<JobImageAudit> jobImageAuditList = from a in auditList join ai in imageList on a.ImageID equals ai.ImageID select new JobImageAudit { JobID = a.JobID, ImageID = a.ImageID.Value, CreatedBy = a.CreatedBy, CreatedDate = a.CreatedDate, Comment = a.Comment, LowResUrl = ai.LowResUrl, }; auditTrailList.ItemsSource = jobImageAuditList; However I can't because the async calls haven't returned with the data yet... Thus I have to do this (Perform the Load Operations, Then Press A Button On The Child Window To Execute The List Concatenation and binding): private void LoadAuditsButton_Click(object sender, RoutedEventArgs e) { IEnumerable<JobImageAudit> jobImageAuditList = from a in auditList join ai in imageList on a.ImageID equals ai.ImageID select new JobImageAudit { JobID = a.JobID, ImageID = a.ImageID.Value, CreatedBy = a.CreatedBy, CreatedDate = a.CreatedDate, Comment = a.Comment, LowResUrl = ai.LowResUrl, }; auditTrailList.ItemsSource = jobImageAuditList; } Potential Ideas for Solutions: Delay the child window displaying somehow? Potentially use DomainDataSource and the Activity Load control?! Any thoughts, help, solutions, samples comments etc. greatly appreciated.

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  • BounceEase and silverlight 4 BarSeries

    - by Pharabus
    Hi, I am trying to get a bar series to "bounce" when drawing, I assumed the BounceEase TransitionEasingFunction would do this but the lines just fade in, I have posted the xaml and code behind below, does anyone know where I have gone wrong or is it more complex than I though, I am fairly new to silverlight XAML <Grid x:Name="LayoutRoot" Background="White"> <chartingToolkit:Chart x:Name="MyChart"> <chartingToolkit:BarSeries Title="Sales" ItemsSource="{Binding}" IndependentValuePath="Name" DependentValuePath="Value" AnimationSequence="FirstToLast" TransitionDuration="00:00:3"> <chartingToolkit:BarSeries.TransitionEasingFunction> <BounceEase EasingMode="EaseInOut" Bounciness="5" /> </chartingToolkit:BarSeries.TransitionEasingFunction> <chartingToolkit:BarSeries.DataPointStyle> <Style TargetType="Control"> <Setter Property="Background" Value="Red"/> </Style> </chartingToolkit:BarSeries.DataPointStyle> </chartingToolkit:BarSeries> <chartingToolkit:Chart.Axes> <chartingToolkit:LinearAxis Title="Types owned" Orientation="X" Minimum="0" Maximum="300" Interval="10" ShowGridLines="True" FontStyle='Italic'/> </chartingToolkit:Chart.Axes> </chartingToolkit:Chart> </Grid> code behind public class MyClass : DependencyObject { public string Name { get; set; } public Double Value { get { return (Double)GetValue(myValueProperty); } set{SetValue(myValueProperty,value);} } public static readonly DependencyProperty myValueProperty = DependencyProperty.Register("Value", typeof(Double), typeof(MyClass), null); } public MainPage() { InitializeComponent(); //Get the data IList<MyClass> l = this.GetData(); //Get a reference to the SL Chart MyChart.DataContext = l.OrderBy(e => e.Value); //Find the highest number and round it up to the next digit DispatcherTimer myDispatcherTimer = new DispatcherTimer(); myDispatcherTimer.Interval = new TimeSpan(0, 0, 0, 5, 0); // 100 Milliseconds myDispatcherTimer.Tick += new EventHandler(Each_Tick); myDispatcherTimer.Start(); } public void Each_Tick(object o, EventArgs sender) { ((BarSeries)MyChart.Series[0]).DataContext = GetData(); } private IList<MyClass> GetData() { Random random = new Random(); return new List<MyClass>() { new MyClass() {Name="Bob Zero",Value=(random.NextDouble() * 100.0)}, new MyClass() {Name="Bob One",Value=(random.NextDouble() * 100.0)}, new MyClass() {Name="Bob Two",Value=(random.NextDouble() * 100.0)}, new MyClass() {Name="Bob Three",Value=(random.NextDouble() * 100.0)} }; }

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  • Rx framework: How to wait for an event to be triggered in silverlight test

    - by user324255
    Hi, I have a ViewModel that starts loading the Model async in the constructor, and triggers an event when the Model is loaded. I got a test working with the silverlight unit test framework, like this : bool done = false; [TestMethod] [Asynchronous] public void Test_NoCustomerSelected() { ProjectListViewModel viewModel = null; EnqueueCallback(() => viewModel = new ProjectListViewModel()); EnqueueCallback(() => viewModel.ModelLoaded += new EventHandler<EventArgs>(viewModel_ModelLoaded)); EnqueueConditional(() => done); EnqueueCallback(() => Assert.IsNotNull(viewModel.FilteredProjectList)); EnqueueCallback(() => Assert.AreEqual(4, viewModel.FilteredProjectList.Count)); EnqueueTestComplete(); } void viewModel_ModelLoaded(object sender, EventArgs e) { done = true; } But I'm beginning playing with Rx Framework, and trying to get my test to work, but so far I have no luck. Here's 2 attempts : public void Test_NoCustomerSelected2() { ProjectListViewModel viewModel = null; viewModel = new ProjectListViewModel(eventAggregatorMock.Object, moduleManagerMock.Object); IObservable<IEvent<EventArgs>> eventAsObservable = Observable.FromEvent<EventArgs>( ev => viewModel.ModelLoaded += ev, ev => viewModel.ModelLoaded -= ev); eventAsObservable.Subscribe(args => viewModel_ModelLoaded(args.Sender, args.EventArgs)); eventAsObservable.First(); Assert.IsNotNull(viewModel.Model); Assert.AreEqual(4, viewModel.Model.Count); } [TestMethod] public void Test_NoCustomerSelected3() { ProjectListViewModel viewModel = null; var o = Observable.Start(() => viewModel = new ProjectListViewModel(eventAggregatorMock.Object, moduleManagerMock.Object)); IObservable<IEvent<EventArgs>> eventAsObservable = Observable.FromEvent<EventArgs>( ev => viewModel.ModelLoaded += ev, ev => viewModel.ModelLoaded -= ev); o.TakeUntil(eventAsObservable) .First(); Assert.IsNotNull(viewModel.Model); Assert.AreEqual(4, viewModel.Model.Count); } The first test goes in waiting forever, the second doesn't work because the viewModel is null when it does the FromEvent. Anyone has a clue on how to do this properly?

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