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  • Bind a subclass to property

    - by Neir0
    Hi i have a simple question. Ofcourse it has many answers but i cannt choose right keywords to google. How i can bind a subclass to my wpf control? for example: It's my class. public class SiteFieldInfo<T> { public string Name { get; set; } public T Value { get; set; } public List<string> PositiveXPathExpressions { get; set; } public List<string> NegativeXPathExpressions { get; set; } } public class SiteInfo { public SiteFieldInfo<string> Author { get; set; } public SiteFieldInfo<DateTime> Date { get; set; } public SiteFieldInfo<string> Source { get; set; } } And i want to bind property Value from SiteFieldInfo to Text property of TextBox control. c# code: stackPanel1.DataContext = SiteInfoInstance; xaml code: <StackPanel Name="stackPanel1"> <TextBlock Text="Author" Grid.Row="0" Grid.Column="0" /> <TextBox Grid.Row="0" Grid.Column="1" Text="{Binding Path=Author.Value}" /> </StackPanel> It's not working. What is right syntax or any alternatives?

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  • Draw a column graph with no space between columns

    - by Andrew Shepherd
    I am using the WPF toolkit, and am trying to render a graph that looks like a histogram. In particular, I want each column to be right up against each other column. There should be no gaps between columns. There are a number of components that you apply when creating a column graph. (See example XAML below). Does anybody know if there is a property you can set on one of the elements which refers to the width of the white space between columns? <charting:Chart Height="600" Width="Auto" HorizontalAlignment="Stretch" Name="MyChart" Title="Column Graph" LegendTitle="Legend"> <charting:ColumnSeries Name="theColumnSeries" Title="Series A" IndependentValueBinding="{Binding Path=Name}" DependentValueBinding="{Binding Path=Population}" Margin="0" > </charting:ColumnSeries> <charting:Chart.Axes> <charting:LinearAxis Orientation="Y" Minimum="200000" Maximum="2500000" ShowGridLines="True" /> <charting:CategoryAxis Name="chartCategoryAxis" /> </charting:Chart.Axes> </charting:Chart>

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  • How have you successfully implemented MessageBox.Show() functionality in MVVM?

    - by Edward Tanguay
    I've got a WPF application which calls MessageBox.Show() way back in the ViewModel (to check if the user really wants to delete). This actually works, but goes against the grain of MVVM since the ViewModel should not explicitly determine what happens on the View. So now I am thinking how can I best implement the MessageBox.Show() functionality in my MVVM application, options: I could have a message with the text "Are you sure...?" along with two buttons Yes and No all in a Border in my XAML, and create a trigger on the template so that it is collapsed/visible based on a ViewModelProperty called AreYourSureDialogueBoxIsVisible, and then when I need this dialogue box, assign AreYourSureDialogueBoxIsVisible to "true", and also handle the two buttons via DelegateCommand back in my ViewModel. I could also somehow try to handle this with triggers in XAML so that the Delete button actually just makes some Border element appear with the message and buttons in it, and the Yes button did the actually deleting. Both solutions seem to be too complex for what used to be a couple lines of code with MessageBox.Show(). In what ways have you successfully implemented Dialogue Boxes in your MVVM applications?

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  • validation properties by attribute

    - by netmajor
    I create class with two property - name,link(below). I use simple property validation by Required and StringLength attribute. I bind this class object to WPF ListBox(with textBoxs). But when I have textbox empty or write words longer than 8 sign nothing happens :/ What should I do to fires ErrorMessage? Or how to implement validation in other way ? I also try use : if (value is int) { throw new ArgumentException("Wpisales stringa!!"); } But it only fires in debug mode :/ My class with implementation of attribute validation: public class RssInfo : INotifyPropertyChanged { public RssInfo() { } public RssInfo(string _nazwa, string _link) { nazwa = _nazwa; link = _link; } private string nazwa; [Required(ErrorMessage = "To pole jest obowiazkowe nAZWA")] public string Nazwa { get { return nazwa; } set { if (value != nazwa) { nazwa = value; onPropertyChanged("Nazwa"); } if (value is int) { throw new ArgumentException("Wpisales stringa!!"); } } } private string link; [Required(ErrorMessage="To pole jest obowiazkowe link")] [StringLength(8, ErrorMessage = "Link cannot be longer than 8 characters")] public string Link { get { return link; } set { if (value != link) { link = value; onPropertyChanged("Link"); } } } #region INotifyPropertyChanged Members public event PropertyChangedEventHandler PropertyChanged; #endregion private void onPropertyChanged(string propertyName) { if (this.PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } }

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  • Setting ItemTemplate based on CheckBox value

    - by ph0enix
    I have a DataTemplate which contains a CheckBox and ListBox. When the CheckBox is checked, I want to change the ItemTemplate property on the ListBox to change the appearance of each item. Right now, it looks like this: <DataTemplate DataType={x:Type MyViewModel}> <DockPanel> <CheckBox DockPanel.Dock="Bottom" Content="Show Details" HorizontalAlignment="Right" IsChecked="{Binding ShowDetails}" Margin="0 5 10 5" /> <ListBox ItemsSource="{Binding Items}" ItemTemplate="{StaticResource SimpleItemTemplate}" Margin="10 0 10 5"> <ListBox.Triggers> <DataTrigger Binding="{Binding ShowDetails}" Value="True"> <Setter Property="ItemTemplate" Value="{StaticResource DetailedItemTemplate}" /> </DataTrigger> </ListBox.Triggers> </ListBox> </DockPanel> </DataTemplate> However, when I try to compile, I get the following error messages: Value 'ItemTemplate' cannot be assigned to property 'Property'. Invalid PropertyDescriptor value. and Cannot find the static member 'ItemTemplateProperty' on the type 'ContentPresenter'. I'm still fairly new to WPF, so perhaps there is something I'm not quite understanding?

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  • GridViewColumn not subscribing to PropertyChanged event in a ListView

    - by Chris Wenham
    I have a ListView with a GridView that's bound to the properties of a class that implements INotifyPropertyChanged, like this: <ListView Name="SubscriptionView" Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="2" ItemsSource="{Binding Path=Subscriptions}"> <ListView.View> <GridView> <GridViewColumn Width="24" CellTemplate="{StaticResource IncludeSubscriptionTemplate}"/> <GridViewColumn Width="150" DisplayMemberBinding="{Binding Path=Name}" Header="Subscription"/> <GridViewColumn Width="75" DisplayMemberBinding="{Binding Path=RecordsWritten}" Header="Records"/> <GridViewColumn Width="Auto" CellTemplate="{StaticResource FilenameTemplate}"/> </GridView> </ListView.View> </ListView> The class looks like this: public class Subscription : INotifyPropertyChanged { public int RecordsWritten { get { return _records; } set { _records = value; if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("RecordsWritten")); } } private int _records; ... } So I fire up a BackgroundWorker and start writing records, updating the RecordsWritten property and expecting the value to change in the UI, but it doesn't. In fact, the value of PropertyChanged on the Subscription objects is null. This is a puzzler, because I thought WPF is supposed to subscribe to the PropertyChanged event of data objects that implement INotifyPropertyChanged. Am I doing something wrong here?

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  • Why does ObservableCollection throws an exception when being modified?

    - by Oliver Hanappi
    Hi! My application uses a WPF DataGrid. One of the columns is a template column that containts a combobox bound to an ObservableCollection of the entity which feeds the row. When I add a value to the ObservableCollection, a NullReferenceException is thrown. Has anybody an idea why this happens? Here is the stacktrace of the exception: at MS.Internal.Data.PropertyPathWorker.DetermineWhetherDBNullIsValid() at MS.Internal.Data.PropertyPathWorker.get_IsDBNullValidForUpdate() at MS.Internal.Data.ClrBindingWorker.get_IsDBNullValidForUpdate() at System.Windows.Data.BindingExpression.ConvertProposedValue(Object value) at System.Windows.Data.BindingExpressionBase.UpdateValue() at System.Windows.Data.BindingExpression.Update(Boolean synchronous) at System.Windows.Data.BindingExpressionBase.Dirty() at System.Windows.Data.BindingExpression.SetValue(DependencyObject d, DependencyProperty dp, Object value) at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, OperationType operationType, Boolean isInternal) at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value) at System.Windows.Controls.Primitives.Selector.UpdatePublicSelectionProperties() at System.Windows.Controls.Primitives.Selector.SelectionChanger.End() at System.Windows.Controls.Primitives.Selector.OnItemsChanged(NotifyCollectionChangedEventArgs e) at System.Windows.Controls.ItemsControl.OnItemCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e) at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e) at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args) at System.Windows.Controls.ItemCollection.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type managerType, Object sender, EventArgs e) at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list) at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args) at System.Collections.Specialized.CollectionChangedEventManager.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args) at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args) at System.Windows.Data.ListCollectionView.ProcessCollectionChangedWithAdjustedIndex(NotifyCollectionChangedEventArgs args, Int32 adjustedOldIndex, Int32 adjustedNewIndex) at System.Windows.Data.ListCollectionView.ProcessCollectionChanged(NotifyCollectionChangedEventArgs args) at System.Windows.Data.CollectionView.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args) at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e) at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item) at System.Collections.ObjectModel.Collection`1.Add(T item) at ORF.PersonBook.IdentityModule.Model.SubsidiaryModel.AddRoom(RoomModel room) in C:\Project\Phoenix\Development\src\ORF.PersonBook.IdentityModule\Model\SubsidiaryModel.cs:line 127

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  • How to dispatch a new property value in an object to the same property of two other objects

    - by WPFadvocate
    In WPF, I've three objects exposing the same DependencyProperty (let's say it's an integer). I want all three property values to remain synchronized, i.e. that whenever the int value changes in an object, this value is propagated to the two other objects. I think of multibinding to do the job, but I don't know how to detect which object changed, thus which value should be used and propagated to the other objects. Edited: here is my tentative code for multibinding, with the false hope that it would work without additional code: // create the multibinding MultiBinding mb = new MultiBinding() { Mode = BindingMode.TwoWay, UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged }; // create individual bindings to associate object_2 and object_3 to object_1 Binding b2 = new Binding() { Source = object_2, Path = new PropertyPath("X") }; Binding b3 = new Binding() { Source = object_3, Path = new PropertyPath("X") }; // add individual bindings to multibinding mb.Bindings.Add(b2); mb.Bindings.Add(b3); // bind object_2 and _3 to object_1 BindingOperations.SetBinding(object_1, TypeObject_1.XProperty, mb); But actually, there is a runtime error, saying the binding set by the last instruction is lacking a converter. But again I don't know how to write this converter (there is nothing to convert (as this is the case in the related MS sample of code linking 3 rgb properties to a color property), only to forward the value of the property changed to the two other properties). I understand I could solve the problem by creating an X_Changed event in the 3 types and then have each object registering to the two other objects event. I don't like this "manual" way and would prefer to bind the 3 properties together.

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  • BitmapFrame in another thread

    - by Lasse Lindström
    Hi I am using a WPF BackgroundWorker to create thumbnails. My worker function looks like: private void work(object sender, DoWorkEventArgs e) { try { var paths = e.Argument as string[]; var boxList = new List(); foreach (string path in paths) { if (!string.IsNullOrEmpty(path)) { FileInfo info = new FileInfo(path); if (info.Exists && info.Length 0) { BitmapImage bi = new BitmapImage(); bi.BeginInit(); bi.DecodePixelWidth = 200; bi.CacheOption = BitmapCacheOption.OnLoad; bi.UriSource = new Uri(info.FullName); bi.EndInit(); var item = new BoxItem(); item.FilePath = path; MemoryStream ms = new MemoryStream(); PngBitmapEncoder encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(bi)); encoder.Save(ms); item.ThumbNail = ms.ToArray(); ms.Close(); boxList.Add(item); } } } e.Result = boxList; } catch (Exception ex) { //nerver comes here } } When this fuction is finnished and before the BackgroundWorker "Completed" function is started, I can see on the output window on Vs2008, that a exception is generated. It looks like: A first chance exception of type 'System.NotSupportedException' occurred in PresentationCore.dll The number of exceptions generates equals the number of thumbnails to be generated. Using "trial and error" I have isolated the problem to: BitmapFrame.Create(bi) Removing that line (makes my function useless) also removes the exception. I have not found any explanation to this,,, or a better method to create thumbnails i a background thread. Can anyone help me? //lasse

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  • Conflict When Two Storyboards Sets the Opacity Property?

    - by kennethkryger
    Hi, Background: I have a WPF UserControl (MainControl - not shown in code below) that contains another one (called MyControl in the code below). MainControl has it's DataContext set to an object, that has a Project-property. When MainControl loads, the Project-property is always null. The problem: When MainControl loads, I want to fade in the MyControl using a special storyboard (only used this one time (this "specialFadeInStoryboard" changes Opacity-property of MyControl from 0 to 1). When the Project-property is set to a value other than null, I want the MyControl to fade out using the "fadeOutStoryboard" (changes Opacity-property of MyControl to 0) and if it's set to null afterwards I want to fade it in again this time using the "fadeInStoryboard" (changes Opacity-property of MyControl to 1). However, after adding the code for the "specialFadeInStoryboard", the MyControl is never faded out... What am I doing wrong? <local:MyControl Visibility="{Binding RelativeSource={RelativeSource Self}, Path=Opacity, Converter={StaticResource opacityToVisibilityConverter}, Mode=OneWay}"> <local:MyControl.Style> <Style> <Style.Triggers> <EventTrigger RoutedEvent="FrameworkElement.Loaded"> <BeginStoryboard Storyboard="{StaticResource specialFadeInStoryboard}"/> </EventTrigger> <DataTrigger Binding="{Binding Project, Converter={StaticResource nullToBooleanConverter}, Mode=OneWay}" Value="True"> <DataTrigger.EnterActions> <BeginStoryboard Storyboard="{StaticResource fadeOutStoryboard}"/> </DataTrigger.EnterActions> <DataTrigger.ExitActions> <BeginStoryboard Storyboard="{StaticResource fadeInStoryboard}"/> </DataTrigger.ExitActions> </DataTrigger> </Style.Triggers> </Style> </local:MyControl.Style> </local:MyControl>

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  • Help with editing data in entity framework.

    - by Levelbit
    Title of this question is simple because there is no an easy explanation for what I'm trying to ask you. I hope you'll understand in the end :). I have to tables in my database: Company and Location (relationship:one to many) and corresponding entity sets. In my wpf application I have some datagrid which I want to fill with locations and to be able to edit every row in separate window as some form of details view (so I don't want to edit my data in datagrid). I did this by accessing Location entity from selected row and creating a new Location entity and then I copy properties from original entity to newly created. Something like cloning the object. After editing if I press OK changed data is copied to original object back, and if I press Cancel nothing happens. Of course, you probably thinking I could use NoTracking option and AttachAsModified method as was mentioned as solution in some earlier questions(see:http://stackoverflow.com/questions/803022/changing-entities-in-the-entityframework) by Alex James, but lets say I had some problems about that and I have my own reasons for doing this. Finally, because navigation property(Company) of my location entity is assigned to newly created location object(during cloning) from some reason in object context additional object as copy of object I want to edit from datagrid is created without my will(similar problem :http://blogs.msdn.com/alexj/archive/2009/12/02/tip-47-how-fix-up-can-make-it-hard-to-change-relationships.aspx). So, when I do ObjectContext.SaveChanges it inserts additional row of data into my database table Location, the same as the one i wanted to edit. I read about sth like this, but I don't quite understand why is that and how to block or override this. I hope I was clear as I could. Please, solutions or some other ideas.

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  • HOW CAn I Differciate the button click Event

    - by SHASHANK
    hello All i have a problem. i m making Some wpf button Dynamic through C#.i m using it A loop for this now i m trying to find all button Click Event. i find it But It Work Same on All The button Click how Can i Differciate all the button . thanks in Advance shashank `for (int i = 0; i < 2; i++) { Button b1 = new Button(); //this.RegisterName("myAnimatedBrush", b1); b1.Name = "button" + i; b1.Height = 200; b1.Width = 200; b1.Margin = new Thickness(0, -100, 0, 0); b1.HorizontalAlignment = HorizontalAlignment.Left; b1.Content = "English"; b1.Background = System.Windows.Media.Brushes.Pink; b1.Click+=new RoutedEventHandler(b1_Click); canvasbtn.Children.Add(b1); Canvas.SetLeft(b1,b1.Width * i); }`

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  • Xaml parse exception is thrown when i define a duplex contract

    - by Yaroslav
    Hi! I've got a WPF application containing a WCF service. The Xaml code is pretty simple: Enter your text here Send Address: Here is the service: namespace WpfApplication1 { [ServiceContract(CallbackContract=typeof(IMyCallbackContract))] public interface IMyService { [OperationContract(IsOneWay = true)] void NewMessageToServer(string msg); [OperationContract(IsOneWay = true)] bool ServerIsResponsible(); } [ServiceContract] public interface IMyCallbackContract { [OperationContract] void NewMessageToClient(string msg); [OperationContract] void ClientIsResponsible(); } /// <summary> /// Interaction logic for Window1.xaml /// </summary> public partial class Window1 : Window { public Window1() { InitializeComponent(); ServiceMetadataBehavior behavior = new ServiceMetadataBehavior(); //behavior.HttpGetEnabled = true; //behavior. ServiceHost serviceHost = new ServiceHost( typeof(MyService), new Uri("net.tcp://localhost:8080/")); serviceHost.Description.Behaviors.Add(behavior); serviceHost.AddServiceEndpoint( typeof(IMetadataExchange), MetadataExchangeBindings.CreateMexTcpBinding(), "mex"); serviceHost.AddServiceEndpoint( typeof(IMyService), new NetTcpBinding(), "ServiceEndpoint"); serviceHost.Open(); MessageBox.Show( "server is up"); // label1.Content = label1.Content + String.Format(" net.tcp://localhost:8080/"); } } public class MyService : IMyService { public void NewMessageToServer(string msg) { } public bool ServerIsResponsible() { return true; } } } I am getting a Xaml parse exception in Line 1, what can be the problem? Thanks!

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  • Simple grid layout question

    - by Matt H.
    I can't believe I'm back to this after working with WPF for 3 months :) Consider very common setup: How do I configure the rowheights so that the top and bottom rows (menu bar and status bar) size to fit the height of their content, and the middle row (main content), fills the remaining available space in the program? I can't fix the height of the top/bottom rows because the height of their content can vary. <Window> <Grid> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <Menu Grid.Row=0> ...menuitems </Menu> <Grid Grid.Row=1> ...main application content here (like most programs) </Grid> <StatusBar> ...statusbaritems </StatusBar> </Grid> </Window>

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  • Castle Windsor Dynamic Property in XML config

    - by haxelit
    I'm trying to set the DataContext on ApplicationMainWindow which is a WPF window. When I set it up in the XML like so it leaves the DataContext null: <!-- View Models --> <component id="mainwindow.viewmodel" type="ProjectTracking.ApplicationMainViewModel, ProjectTracking" inspectionBehavior="none" lifestyle="transient"> </component> <!-- UI Components --> <component id="mainwindow.view" type="ProjectTracking.ApplicationMainWindow, ProjectTracking" inspectionBehavior="none" lifestyle="transient"> <parameters> <DataContext>${mainwindow.viewmodel}</DataContext> </parameters> </component> But if I do it this way via C# it works. _Kernel.Register( ... Component.For<ApplicationMainWindow>() .DynamicParameters( (k,d) => { d["DataContext"] = k[typeof(ApplicationMainViewModel)]; }) ); I'm instantiating my window like so: Window window = _Kernel[typeof(ApplicationMainWindow)] as Window; When I configure windsor via the xml config it leaves my DataContext NULL, but when I configure it via code it works like a charm. Do I need to use code to pull this off, or should it work via XML config ? Thanks, Raul

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  • Expression Blend doesn't recognize comand objects declared in code behind file

    - by Brian Ensink
    I have a WPF UserControl. The code behind file declares some RoutedUICommand objects which are referenced in the XAML. The application builds and runs just fine. However Expression Blend 3 cannot load the XAML in the designer and gives errors like this one: The member "ResetCameraComand" is not recognized or accessible. The class and the member are both public. Building and rebuilding the project in Blend and restarting Blend hasn't helped. Any ideas what the problem is? Here are fragments of my XAML ... <UserControl x:Class="CAP.Visual.CameraAndLightingControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:CAP.Visual;assembly=VisualApp" Height="100" Width="700"> <UserControl.CommandBindings> <CommandBinding Command="local:CameraAndLightingControl.ResetCameraCommand" Executed="ResetCamera_Executed" CanExecute="ResetCamera_CanExecute"/> </UserControl.CommandBindings> .... ... and the code behind C# namespace CAP.Visual { public partial class CameraAndLightingControl : UserControl { public readonly static RoutedUICommand ResetCameraCommand; static CameraAndLightingControl() { ResetCameraCommand = new RoutedUICommand("Reset Camera", "ResetCamera", typeof(CameraAndLightingControl)); }

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  • How do I animate UserControl objects using Storyboard and DoubleAnimation?

    - by Neo
    In my WPF application, I have a Canvas object that contains some UserControl objects. I wish to animate the UserControl objects within the Canvas using DoubleAnimation so that they go from the right of the Canvas to the left of the Canvas. This is how I have done it so far (by passing the UserControl objects into the function): private void Animate(FrameworkElement e) { DoubleAnimation ani = new DoubleAnimation() { From = _container.ActualWidth, To = 0.0, Duration = new Duration(new TimeSpan(0, 0, 10), TargetElement = e }; TranslateTransform trans = new TranslateTransform(); e.RenderTransform = trans; trans.BeginAnimation(TranslateTransform.XProperty, ani, HandoffBehavior.Compose); } However, this doesn't allow me to pause the animation, so I have considered using a Storyboard instead to do this, but I'm not sure how to implement this. This has been my attempt so far: private void Animate(FrameworkElement e) { DoubleAnimation ani = new DoubleAnimation() { From = _container.ActualWidth, To = 0.0, Duration = new Duration(new TimeSpan(0, 0, 10), TargetElement = e }; Storyboard stb = new Storyboard(); Storyboard.SetTarget(ani, e); Storyboard.SetTargetProperty(ani, "Left"); stb.Children.Add(ani); stb.Begin(); } Of course, this fails as UserControl doesn't have a Left property. How can I achieve what I'm after? Thanks.

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  • Sort on DataView does not work if DataTable has zero rows

    - by BigBlondeViking
    We have a WPF app that has a DataGrid insode a ListView. private DataTable table_; We do a bunch or dynamic column generation ( depending on the report we are showing ) We then do the a query and fill the DataTable row by row, this query may or may not have data.( not the problem, an empty grid is expected ) We set the ListView's ItemsSource to the DefaultView of the DataTable. lv.ItemsSource = table_.DefaultView; We then (looking at the user's pass usage of the app, set the sort on the column) Sort Method below: private void Sort(string sortBy, ListSortDirection direction) { var dataView = CollectionViewSource.GetDefaultView(lv.ItemsSource); dataView.SortDescriptions.Clear(); var sd = new SortDescription(sortBy, direction); dataView.SortDescriptions.Add(sd); dataView.Refresh(); } In the Zero DataTable rows scenario, the sort does not "hold"? and if we dynamically add rows they will not be in sorted order. If the DataTable has at-least 1 row when the sort is applied, and we dynamically add rows to the DataTable, the rows com in sorted correctly. I have built a standalone app that replicate this... It is an annoyance and I can add a check to see if the DataTable was empty, and re-sort... Anyone know whats going on here, and am I doing something wrong? FYI: What we based this off if comes from the MSDN as well: http://msdn.microsoft.com/en-us/library/ms745786.aspx

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  • Setting CommandTarget to selected control in a TabControl

    - by Bart
    I have a WPF window with a few buttons and a tabcontrol having a tab for each 'document' the user is working on. The tabcontrol uses a DataTemplate to render the data in ItemSource of the tabcontrol. The question: If one of the buttons is clicked, the command should be executed on the control rendering the document in the active tab, but I've no idea what I should set CommandTarget to. I tried {Binding ElementName=nameOfControlInDataTemplate} but that obviously doesn't work. I tried to make my problem a bit more abstract with the following code (no ItemSource and Document objects, but the idea is still the same). <Button Command="ApplicationCommands.Save" CommandTarget="{Binding ElementName=nestedControl}">Save</Button> <TabControl x:Name="tabControl"> <TabControl.Items> <TabItem Header="Header1">Item 1</TabItem> <TabItem Header="Header2">Item 2</TabItem> <TabItem Header="Header3">Item 3</TabItem> </TabControl.Items> <TabControl.ContentTemplate> <DataTemplate> <CommandTest:NestedControl Name="nestedControl"/> </DataTemplate> </TabControl.ContentTemplate> </TabControl> I tested the code by replacing the complete tabcontrol with only one single NestedControl, and then the command button just works. To be complete, here is the code of NestedControl: <UserControl x:Class="CommandTest.NestedControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Grid> <Label x:Name="label" Content="Not saved"/> </Grid> </UserControl> And code behind: public partial class NestedControl : UserControl { public NestedControl() { CommandBindings.Add(new CommandBinding(ApplicationCommands.Save, CommandBinding_Executed)); InitializeComponent(); } private void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e) { label.Content = "Saved"; } }

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  • Why can't I Bind a viewmodel property to a dependency property of a custom control

    - by Robert
    I want to use a color picker in my wpf application and I saw a nice looking one on this codeproject page. The control works fine until I want to connect the control to a viewmodel. I created a small test program with this viewmodel: public class ColorViewModel : ViewModelBase { public ColorViewModel() { LineColor = Brushes.Yellow; } SolidColorBrush _brushColor; public SolidColorBrush LineColor { get { return _brushColor; } set { _brushColor = value; RaisePropertyChanged(() => LineColor); } } } The test program has a textbox and the colorpicker controls: <StackPanel Orientation="Horizontal"> <TextBlock Text="Please Select a Color" FontWeight="Bold" Margin="10" Foreground="{Binding Path=LineColor, UpdateSourceTrigger=PropertyChanged}"/> <vw:ColorPickerControlView x:Name="ForeColorPicker" Margin="10" CurrentColor="{Binding Path=LineColor, UpdateSourceTrigger=PropertyChanged }"/> </StackPanel> In the loaded event of the window I set the viewmodel to the datacontext like this: DataContext = new ColorViewModel(); The problem is that I can't seem to bind the LineColor property of the viewmodel to the CurrentColor property of the ColorPickerControlView. The CurrentControl property of the ColorPickerControlView seems to be fine. The constructor looks like this: public ColorPickerControlView() { this.DataContext = this; InitializeComponent(); CommandBindings.Add(new CommandBinding(SelectColorCommand, SelectColorCommandExecute)); } In the constructor of the UserControl there is the line this.DataContext = this; I read that is is necessary to bind the dependency properties. Do I override this line when I set my viewmodel to the datacontext and is that why I can't bind to the CurrentColor property? Is there any workaround? Or did I make another mistake?

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  • InlineUIControl

    - by zync
    Hi. I have a project in wich I must create a form editor (just like infopath) using wpf. For this I thought to use a RichTextBox and in there I would place InlineUIElements with the different controls (TextBox, ComboBox, etc.). The problem is that I can't change some properties associated with those controls. Here's some XAML: <RichTextBox> <FlowDocument> <Paragraph> <InlineUIContainer> <TextBox Background="Red">Some Text</TextBox> </InlineUIContainer> </Paragraph> </FlowDocument> </RichTextBox> This displays a TextBox in a RichTextBox just like I wanted but it's not red. Some other properties work like width and height. Why is this and how can I make it work? Other question is: Am I approaching the problem (creating the form editor) right? Thanks

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  • Binding DataTemplates (or another aproach)

    - by Bataglião
    Hi all, I'm having some troubles trying to dynamically generate content in WPF and after it bind data. I have the following scenario: TabControl - Dynamically generated TabItems through DataTemplate - inside TabItems, I have dynamic content generated by DataTemplate that I wish to bind (ListBox). The code follows: ::TabControl <TabControl Height="252" HorizontalAlignment="Left" Name="tabControl1" VerticalAlignment="Top" Width="458" Margin="12,12,12,12" ContentTemplate="{StaticResource tabItemContent}"></TabControl> ::The Template for TabControl to generate TabItems <DataTemplate x:Key="tabItemContent"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="*" /> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="*" /> </Grid.RowDefinitions> <ListBox ItemTemplate="{StaticResource listBoxContent}" ItemsSource="{Binding}"> </ListBox> </Grid> </DataTemplate> ::The template for ListBox Inside each TabItem <DataTemplate x:Key="listBoxContent"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="22"/> <ColumnDefinition Width="*" /> </Grid.ColumnDefinitions> <Image Grid.Column="0" Source="{Binding Path=PluginIcon}" /> <TextBlock Grid.Column="1" Text="{Binding Path=Text}" /> </Grid> </DataTemplate> So, when I try to do this on code inside a loop to create the tabitems: TabItem tabitem = tabControl1.Items[catIndex] as TabItem; tabitem.DataContext = plugins.ToList(); where 'plugins' is an Enumerable The ListBox is not bounded. I tried also to find the ListBox inside the TabItem to set the ItemSource property but no success at all. Someone have an idea on how to do that? Thanks in advance.

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  • What's the order of execution when using IDataErrorInfo?

    - by Benny Jobigan
    Many times with WPF, we use INotifyPropertyChanged and IDataErrorInfo to enable binding and validation on our data objects. I've got a lot of properties that look like this: public SomeObject SomeData { get { return _SomeData; } set { _SomeData = value; OnPropertyChanged("SomeData"); } } Of course, I have an appropriate overridden IDataErrorInfo.this[] in my class to do validation. Question 1) In a binding situation, what happens? For example: User enters new data. Binding writes data to property. Property set method is executed. Binding checks this[] for validation. If the data is invalid, the binding sets the property back to the old value. Property set method is executed again. This is important if you are adding "hooks" into the set method, like: public string PathToFile { get { return _PathToFile; } set { if (_PathToFile != value && // prevent unnecessary actions OnPathToFileChanging(value)) // allow subclasses to do something or stop the setter { _PathToFile = value; OnPathToFileChanged(); // allow subclasses to do something afterwards OnPropertyChanged("PathToFile"); } } }

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  • Converter problem with XmlDataProvider

    - by Andrew
    Sorry for this, I've just started programming with wpf. I can't seem to figure out why the following xaml displays "System.Xml.XmlElement" instead of the actual xml node content. This is displayed 5 times in the listbox whenever I run it. Not sure where I'm going wrong... <Window x:Class="TestBinding.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <Window.Resources> <XmlDataProvider x:Key="myXmlSource" XPath="/root"> <x:XData> <root xmlns=""> <name>Steve</name> <name>Arthur</name> <name>Sidney</name> <name>Billy</name> <name>Steven</name> </root> </x:XData> </XmlDataProvider> <DataTemplate x:Key="shmooga"> <TextBlock Text="{Binding}"/> </DataTemplate> </Window.Resources> <Grid> <ListBox ItemTemplate="{StaticResource shmooga}" ItemsSource="{Binding Source={StaticResource myXmlSource}, XPath=name}"> </ListBox> </Grid> </Window> Any help would be very much appreciated. Thanks!

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  • Binding properties in code behind

    - by drasto
    I have WPF application and a window in it. Lets have something like this in my xml: <Label Name="TitleLabel" Content="Some title" \> <Label Name="BottomLabel" Content="{Binding ElementName=TitleLabel Path=Content"> Lets say I don't cannot use xml for creation of BottomLabel and TitleLabel. So I have to create the BottomLabel as a property in my "Code behind". How do I specify the same binding for Content property of Bottom label in my code behind ? Is it possible at all ? So I would have something like this: public Label TitleLabel {get; private set;} public Label BottomLabel {get; private set;} public MyClass(){ TitleLabel = new Label(); TitleLabel.Content = "Some title"; BottomLabel = new Label(); BottomLabel.Content = // ?? what should be here ? How do I specify the binding // that binds BottomLabel.COntent to TitleLabel.Content? } What can I write instead of the comment ? Thank you for ansvers.

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