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  • How to reverse items in WPF Datagrid?

    - by irf1x
    If i have DataGrid which looks like: Col 1 Col 2 ------- ------- 1 a 2 b 3 c ... ... n n Can the order be reversed easily without sorting? So that n is first, and 1 is last. I have custom sort implemented from this article, but sorting the same column twice in a row calls sorting function twice (which is slow), so just reversing the order should be faster and have the same effect.

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  • WPF - Centering a checkbox in a GridViewColumn?

    - by Sonny Boy
    Hey all, I'm currently struggling on getting my checkboxes to property center within my GridViewColumns. I've defined a style for my checkboxes like so: <Style TargetType="{x:Type CheckBox}" x:Key="DataGridCheckBox"> <Setter Property="HorizontalAlignment" Value="Center" /> <Setter Property="HorizontalContentAlignment" Value="Center" /> <Setter Property="IsEnabled" Value="False" /> <Setter Property="Margin" Value="4" /> <Setter Property="VerticalAlignment" Value="Center" /> <Setter Property="VerticalContentAlignment" Value="Center" /> <Setter Property="Width" Value="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type GridViewColumn}},Path=ActualWidth}" /> </Style> And my checkboxes are added into the GridViewColumn using a DataTemplate like this: <GridViewColumn Header="Comment"> <GridViewColumn.CellTemplate> <DataTemplate> <CheckBox Style="{StaticResource DataGridCheckBox}" IsChecked="{Binding PropertyItem.Comment, Converter={StaticResource booleanConverter}, ConverterParameter='string'}"/> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> But the problem I have is that the checkboxes remain left-aligned (even when resizing the column). Any ideas? Thanks in advance, Sonny

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  • Scrolling list items in wpf

    - by sudarsanyes
    I guess the following picture depicts the problem better than texts... That is what I need. <ListBox x:Name="NamesListBox" ItemsSource="{Binding}"> <ListBox.ItemsPanel> <ItemsPanelTemplate> <WrapPanel x:Name="ItemWrapPanel"> <WrapPanel.RenderTransform> <TranslateTransform x:Name="ItemWrapPanelTransformation" X="0" /> </WrapPanel.RenderTransform> <WrapPanel.Triggers> <EventTrigger RoutedEvent="WrapPanel.Loaded"> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetName="ItemWrapPanelTransformation" Storyboard.TargetProperty="X" To="-1000" From="{Binding ElementName=ScrollingListItemsWindow, Path=Width}" Duration="0:0:9" RepeatBehavior="100" /> </Storyboard> </BeginStoryboard> </EventTrigger> </WrapPanel.Triggers> </WrapPanel> </ItemsPanelTemplate> </ListBox.ItemsPanel> <ListBox.ItemTemplate> <DataTemplate> <Grid> <Label Content="{Binding}" /> </Grid> </DataTemplate> </ListBox.ItemTemplate> </ListBox> is what I did. But here I don't wanna hard code -1000 for the X value, rather I want to determine this based on the length of the wrap panel/number of items. Can somebody help me with this ?? Reason why I choose list box is that the number of items can increase and decrease at any time and suits the problem better. If you have got any other idea, please suggest it too. Thanks.

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  • Memory leak with WPF & ItemsControl (VB.NET)

    - by Matt H.
    I have an ItemsControl that uses a DataTemplate to display properties in my customClass that implements INotifyPropertyChanged... Pretty straightforward... Some items in the DataTemplate use CommandBindings (such as buttons), and a few have some code-behind (yuck). When I empty the ItemsControl and set all instances of customClass = Nothing , no memory is released from my program. This becomes a problem pretty quickly! Any idea where I should start looking? I've even gone so far as to completely traverse the visual tree of each DataTemplate instance and set each Visual = Nothing. I'm not really if that's supposed to have any effect though.

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  • Reset TextBox.Background to default in WPF so it still gets updated when system settings change

    - by Neo
    I have a TextBox that I wish to reset its Background property to its default value after changing it to a different colour. I have tried setting it to SystemColors.WindowBrush, but then, if the Display Settings are updated to change this value, it doesn't get dynamically reflected in the TextBox (it does normally if TextBox.Background hasn't been touched). Any idea how to do this?

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  • WPF RadioButton selected in UI, but seen by code as IsChecked == false

    - by Mike
    I have some radio buttons in a group box. I select the buttons randomly, and all works perfectly from a visual standpoint and also the event handler is called each time a new button is selected. Now I have a dependency property with a callback when the value changes. When in this callback procedure I read the IsChecked value of any button, the value is False, in spite the button is visually selected (they are all false at the same time, strange). The debugger also displays all buttons unchecked. Hu hu, I'm lacking ideas about the reason, after the basic verifications... <GroupBox> <StackPanel> <RadioButton x:Name="btNone" Content="Disconnected" IsChecked="True" Checked="OnSelChecked"/> <RadioButton x:Name="btManual" Content="Manual" Checked="OnSelChecked"/> </StackPanel> </GroupBox> Event handler: private void OnSelChecked(object sender, RoutedEventArgs e) { if (btManual.IsChecked == true) { // is called } } Dependency property: public static readonly DependencyProperty ManualProperty = DependencyProperty.Register("Manual", typeof(Position), typeof(SwitchBox), new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.AffectsRender, new PropertyChangedCallback(OnManualChanged))); Dependency property callback: private static void OnManualChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args) { SwitchBox box = sender as SwitchBox; if (box.btManual.IsChecked == true) { // never true, why?? } }

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  • WPF: Order of stretch sizing

    - by RFBoilers
    I'm creating a modal dialog window which contains three essential parts: a TextBlock containing instructions, a ContentControl for the dialog panel, and a ContentControl for the dialog buttons. Each of these parts are contained in a separate Grid row. I have some specific constraints when it comes to how the dialog should be sized. The issue I'm having is with the instructions TextBlock. I want the instructions to be as wide as the ContentControl for the dialog panel. The instructions should then wrap and grow vertically as needed. Should the instructions not be able to grow vertically, then it should begin to grow horizontally. Getting the instructions to be the width of the ContentControl and grow vertically was simple. The part I can't seem to figure out is how to get it to grow horizontally when out of vertical space. My initial thought was to create a class that extends TextBlock and override MeasureOverride. However, that method is sealed. Currently, I'm playing with the idea of have the dialog Window override MeasureOverride to calculate the available size for the instructions block. Am I missing a much simpler way of accomplishing this? Does anyone have any better ideas than this? Messing with MeasureOverride seems like it will be a lot of work. Here is some sample code to give you a general idea of how the dialog is laid out: <Window x:Class="Dialogs.DialogWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Name="dialogWindow" ShowInTaskbar="False" WindowStyle="None" AllowsTransparency="True" Background="Transparent" ResizeMode="NoResize" SizeToContent="WidthAndHeight" WindowStartupLocation="CenterScreen"> <Border Style="{StaticResource WindowBorderStyle}" Margin="15"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition Height="Auto"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <TextBlock Margin="25,5" VerticalAlignment="Top" HorizontalAlignment="Left" Text="{Binding Instructions}" TextWrapping="Wrap" Width="{Binding ElementName=panelContentControl, Path=ActualWidth, Mode=OneWay}"/> <ContentControl x:Name="panelContentControl" Grid.Row="1" Margin="25,5" Content="{Binding PanelContent}"/> <ContentControl x:Name="buttonsContentControl" Grid.Row="2" HorizontalAlignment="Right" VerticalAlignment="Center" Margin="25,5" Content="{Binding ButtonsContent}"/> </Grid> </Border> </Window>

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  • WPF Trigger when Property and Data value are true

    - by KrisTrip
    I need to be able to change the style of a control when a property and data value are true. For example, my bound data has an IsDirty property. I would like to change the background color of my control when IsDirty is true AND the control is selected. I found the MultiTrigger and MultiDataTrigger classes...but in this case I need to somehow trigger on data and property. How can I do this?

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  • WPF how to fill combobox in data grid

    - by Rizwan Ullah
    public class DA_ActivityType { public int Id { get; set; } public string Name { get; set; } } public static List GetActivitytypes() { DataContext dbo = new DataContext(); IEnumerable activityTypes = from actType in dbo.ActivityTypes select new DA_ActivityType { Id = actType.TypeId, Name = actType.Name }; return activityTypes.ToList(); } //XAML Code

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  • WPF: Horizontal Alignment

    - by emptyset
    Probably I'm just missing something obvious, but I can't get the image in my DataTemplate to align to the right in the Grid, so that when the window is stretched, the image is "pulled" to the right as well: <Window.Resources> <DataTemplate x:Key="PersonTemplate" DataType="Minimal.Client.Person"> <Border BorderBrush="Purple" BorderThickness="2" CornerRadius="2" Padding="5" Margin="5"> <Grid Margin="10"> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" MinWidth="200"/> <ColumnDefinition Width="Auto" MaxWidth="200"/> </Grid.ColumnDefinitions> <StackPanel Grid.Column ="0" Orientation="Horizontal" > <TextBlock FontFamily="Verdana" FontSize="16" FontWeight="Bold" Text="{Binding LastName}" /> <TextBlock FontFamily="Verdana" FontSize="16" Text=", " /> <TextBlock FontFamily="Verdana" FontSize="16" Text="{Binding FirstName}" /> </StackPanel> <StackPanel Grid.Column="1" Orientation="Vertical" HorizontalAlignment="Right"> <Border BorderBrush="Black" BorderThickness="1"> <Image Source="{Binding Picture}" Width="180" Height="150" /> </Border> </StackPanel> </Grid> </Border> </DataTemplate> </Window.Resources> Any suggestions?

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  • WPF DataGrid row validation error count

    - by SuperFloh1234
    Hi! I'm currently facing the problem, that I import an Excel file to a DataGrid. This works pretty fine, but after importing the table, I need to know how many rows are invalid. I have applied several validation rules for the different datatypes, and I have an icon in the row header, that shows up if the row is invalid. But since I have more that 10.000 rows in the grid, I don't want scroll all the way through it to find the errors. Any ideas, how to determine the count of invalid rows (and then maybe bind that to a textbox)? Thx

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  • WPF DataGrid bind data between columns

    - by Markus2k
    Lets say I have 2 columns in my data Grid: Column A: Selected, and Column B: Name. The Selected column is a checkbox. And Name column is text field. I want to set the color of the text in 'Name' column as Blue if Column A's check box is checked, and Red otherwise. Essentially I don't know how to bind data between columns of the datagrid. And sample code/link providing example would be useful.

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  • WPF BackGroundWorker ProgressChanged not updating textblock

    - by user354469
    I have the method below that seems to behaving strangely. The ProgressChanged and RunWorkerCompleted seem to be updating themselves at the same time. If I comment out the RunWorkerCompleted code which updates the Textblock I see the ProgressChanged taking effect after the data is transferred. What am i doing wrong here? I obviously want the textblock to show I'm getting data, then change when I have finished getting the data. public void GetAppointmentsBackground() { System.Windows.Threading.Dispatcher webServiceDispatcher = this.Dispatcher; worker = new BackgroundWorker(); worker.WorkerReportsProgress = true; worker.DoWork += delegate(object sender, DoWorkEventArgs args) { GetAppointmentsForDayDelegate getAppt = new GetAppointmentsForDayDelegate(GetAppointmentsForDay); webServiceDispatcher.BeginInvoke(getAppt); (sender as BackgroundWorker).ReportProgress(25); }; worker.ProgressChanged += delegate(object s, ProgressChangedEventArgs args) { txtMessages.Text = "Contacting Server"; }; worker.RunWorkerCompleted += delegate(object s, RunWorkerCompletedEventArgs args) { txtMessages.Text = "Completed Successfully"; }; worker.RunWorkerAsync(); }

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  • WPF Empty Row in ItemsControl Binding with ObservableCollection

    - by YoMo
    I have ItemsControl Binding with ObservableCollection, every think is oky excipt when ObservableCollection was empty the ItemsControl showing one empty row !! <ItemsControl Visibility="Visible" ItemsSource="{Binding ocItemsinInvoice,Mode=TwoWay}" x:Name="test" Margin="10,-32,0,207" Width="412" HorizontalAlignment="Left"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <UniformGrid Columns="1" VerticalAlignment="Top" /> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemTemplate> <DataTemplate> <Button x:Name="btnOpenInvoice" Style="{StaticResource OpenInvoicesButton}" FontSize="12" Width="300" Height="60" Foreground="#ff252526"> <StackPanel Orientation="Vertical"> <TextBlock Text="{Binding Item.ItemName}" HorizontalAlignment="Center" VerticalAlignment="Center" /> </StackPanel> </Button> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl> How can I remove it?

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  • WPF - List items not visible in Blend when 'DisplayMemberPath' is used

    - by Andy T
    Hi, We're currently working out how to implement MVVM and I've got to the point where I've got the MVVM Light Toolkit set up in blend and can specify dummy data to be supplied if running in Blend. All good. I've created a dummy list of data. The list contains 6 instances of a very simple class called DummyItem which has Age and Name properties. Here's the main code from my 'DummyList' class: public class DummyItem{ public string Name; public int Age; public DummyItem(string name, int age){ this.Name = name; this.Age = age; } } public class DummyList : ArrayList { public DummyList() { this.Add(new DummyItem("Dummy1", 00)); this.Add(new DummyItem("Dummy2", 01)); this.Add(new DummyItem("Dummy3", 02)); this.Add(new DummyItem("Dummy4", 03)); this.Add(new DummyItem("Dummy5", 04)); this.Add(new DummyItem("Dummy6", 05)); } } Here's the operative part of my XAML. The DataContext line does work and points to the correct ViewModel. <Grid x:Name="LayoutRoot"> <ListBox x:Name="ListViewBox" DataContext="{Binding Source={StaticResource Locator}, Path=ListViewModel}" ItemsSource="{Binding TheList}" DisplayMemberPath="Name"> </ListBox> </Grid> The problem is, when I add 'DisplayMemberPath', as I have above, then I can no longer see the list items in Blend. If I remove 'DisplayMemberPath', then I see a list of objects (DummyItem) with their full path. When the app is run, everything works perfectly. It's just that in Blend itself I cannot see the list items when I use 'DisplayMemberPath'. Anyone know why I can't see the items inside Blend itself when I use DisplayMemberPath? Thanks! AT

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  • WPF closing child- closes parent-window

    - by Thomas Spranger
    i have the pretty same sample as mentioned here. Fast concluded: MainWindow closes when the last childwindow is closed. My Problem: I couldn't solve my problems with the described solutions. I can't produce a program where it als takes place. Only in one of my bigger progs. Maybe someone has an idea or knows any further steps. Thanks for reading - Thomas As requested here's a bit of code: This is the part in the MainWindow: bool editAfterSearch = false; Movie selectedMovie = (Movie)this.listView.SelectedItem; Movie backup = (Movie)selectedMovie.Clone(); if (new OnlineSearchWindow().EditMovieViaOnlineSearch(ref selectedMovie, out editAfterSearch)) { this.coverFlow.Update(selectedMovie); } And that's the part of the ChildWindow: public bool EditMovieViaOnlineSearch(ref Movie preset, out bool editAfter) { this.exitWithOk = false; this.editMovieAfterSearch = false; this.tbx_SearchTerm.Text = preset.Title; this.linkedMovie = preset; this.ShowDialog(); editAfter = editMovieAfterSearch; if (this.exitWithOk) { this.linkedMovie.CloneOnlineInformation(ref preset); preset.Bitmap = this.linkedMovie.Bitmap; return true; } else { return false; } }

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  • WPF MVVM Property Change Animation

    - by cjibo
    I am looking for a clean way to start an animation that will have dynamic values. Basically I want to do an animation where an element changes width based on the data of another element. Say I have a TextBlock that's Text Property is Binding. When this property changes I want a visual element say a Rectangle for our sake to do a DoubleAnimation changing the width from previous value to the new value. I am trying to stay away from putting code in my view if possible. I've looked into DataTriggers but they seem to require that you know what the value would be such as an Enum. In my case it is just the value changing that needs to trigger a storyboard and the animation would need to start at the current(previous) value and move nicely to the new value. Any ideas. Maybe I just missed a property.

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  • Unset/Change Binding in WPF

    - by captcalamares
    How can I unset the binding applied to an object so that I can apply another binding to it from a different location? Suppose I have two data templates binded to the same object reference. Data Template #1 is the default template to be loaded. I try to bind a button command to a Function1 from my DataContext class: <Button Content="Button 1" CommandParameter="{Binding }" Command="{Binding DataContext.Function1, RelativeSource={RelativeSource AncestorType={x:Type Window}}}"/> This actually works and the function gets binded. However, when I try to load Data Template # 2 to the same object (while trying to bind another button command to a different function (Function2) from my DataContext class): <Button Content="Button 2" CommandParameter="{Binding }" Command="{Binding DataContext.Function2, RelativeSource={RelativeSource AncestorType={x:Type Window}}}" /> It doesn't work and the first binding is still the one executed. Is there a workaround to this? EDIT (for better problem context): I defined my templates in my Window.Resources: <Window.Resources> <DataTemplate DataType="{x:Type local:ViewModel1}"> <local:View1 /> </DataTemplate> <DataTemplate DataType="{x:Type local:ViewModel2}"> <local:View2 /> </DataTemplate> </Window.Resources> The View1.xaml and the View2.xaml contain the button definitions that I described above (I want them to command the control of my process flow). ViewModel1 and ViewModel2 are my ViewModels that implement the interface IPageViewModel which is the type of my variable CurrentPageViewModel. In my XAML, I binded ContentControl to the variable CurrentPageViewModel: <ContentControl Content="{Binding CurrentPageViewModel}" HorizontalAlignment="Center"/> In my .CS, I have a list defined as List<IPageViewModel> PageViewModels, which I use to contain the instances of my two View Models: PageViewModels.Add(new ViewModel1()); PageViewModels.Add(new ViewModel2()); // Set starting page CurrentPageViewModel = PageViewModels[0]; When I try to change my CurrentPageViewModel to the other view model, this is when I want the new binding to work. Unfortunately, it doesn't. Am I doing things the right way?

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  • How to remove the "button" effect for a menu item (WPF)

    - by Sorin Comanescu
    Hi, When the mouse is over a menu item (first level) it displays a 3D button effect. How can this be removed? Thanks. EDIT: Tried <Style TargetType="MenuItem"> <Style.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="BorderBrush" Value="Transparent"> <Setter Property="BorderThickness" Value="0"> </Trigger> </Style.Triggers> </Style> with no effect. The menu XAML: <Window x:Class="UCWPF.Window3" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:conv="clr-namespace:UCWPF.Converters" Title="Window3" Height="600" Width="600" Background="{StaticResource WindowBackgroundBrush}" > <StackPanel Style="{StaticResource WindowContainerStyle}"> <Menu> <MenuItem Header="New" Icon="{StaticResource ImageExport}" /> <MenuItem Header="Open" Icon="{StaticResource ImageOpen}" /> <MenuItem Header="Save" Icon="{StaticResource ImageSave}" /> <MenuItem Header="Export" Icon="{StaticResource ImageExport}" /> </Menu> ... And here's the screenshot:

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  • WPF UserControl Embedded Animation

    - by Matt B
    Hi all, I have a UserControl called Beetle.xaml which has animation makeing the legs move. So far so good. I added this to my Background.xaml page by decaring the xmlns and xaml as: xmlns:my="clr-namespace:Intellident.Liber8.GUI.Theme.Jungle" and <my:Beetle VerticalAlignment="Bottom" HorizontalAlignment="Left" Margin="180,0,0,175"> <UserControl.RenderTransform> <MatrixTransform x:Name="trnBeetle" /> </UserControl.RenderTransform> </my:Beetle> However I get errors telling me that I can't declare my:Name as I'm in the wrong scope. I can't declare my:Name as this doesn't exist. How do I do this, I want to create a path animation on the beetle to make him walk around... Ta, Matt. EDIT: THought I'd point out that both Beetle.xaml and Background.xaml live in Intellident.Liber8.GUI.Theme.Jungle namescope.

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  • WPF - data binding trigger before content changed

    - by 0xDEAD BEEF
    How do i create trigger, which fires BEFORE binding changes value? How to do this for datatemplate? <ContentControl Content="{Binding Path=ActiveView}" Margin="0,95,0,0"> <ContentControl.Triggers> <--some triger to fire, when ActiveView is changing or has changed ?!?!? --> </ContentControl.Triggers> public Object ActiveView { get { return m_ActiveView; } set { if (PropertyChanging != null) PropertyChanging(this, new PropertyChangingEventArgs("ActiveView")); m_ActiveView = value; if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("ActiveView")); } } How to do this for DataTemplate? <DataTemplate DataType="{x:Type us:LOLClass1}"> <ContentControl> <ContentControl.RenderTransform> <ScaleTransform x:Name="shrinker" CenterX="0.0" CenterY="0.0" ScaleX="1.0" ScaleY="1.0"/> </ContentControl.RenderTransform> <us:UserControl1/> </ContentControl> <DataTemplate.Triggers> <-- SOME TRIGER BEFORE CONTENT CHANGES--> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetName="shrinker" Storyboard.TargetProperty="ScaleX" From="1.0" To="0.8" Duration="0:0:0.3"/> <DoubleAnimation Storyboard.TargetName="shrinker" Storyboard.TargetProperty="ScaleY" From="1.0" To="0.8" Duration="0:0:0.3"/> </Storyboard> </BeginStoryboard> </-- SOME TRIGER BEFORE CONTENT CHANGES--> </DataTemplate.Triggers> </DataTemplate> How to get notification BEFORE binding is changed? (i want to capture changing Visual component to bitmap and create sliding view animation)

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  • Settings aren't saving in WPF?

    - by JOSH
    I'm using the registry Settings.settings thingymabob I'm doing the following in my XAML: <TextBox x:Name="textBoxUsername" Text="{Binding Source={x:Static prop:Settings.Default}, Path=Username, Mode=TwoWay}"></TextBox> This is loading the settings fine. Now in my Window's Closing event I have the following: Properties.Settings.Default.Save(); But it wont save settings?

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  • WPF DataGridRow Template - how to achieve Selected event

    - by user1809972
    I would like to override the DataGridRow template depending on the datatype of object bound to the grid. If the type is label, it just shows a Label. Otehrwise, it shows the cells. Follwing is the xaml. <DataTrigger Binding="{Binding Path=IsLabel, UpdateSourceTrigger=PropertyChanged}" Value="True"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type DataGridRow}"> <Grid> <Label HorizontalAlignment="Center" Padding="3,3,3,3" FontWeight="Bold" Content="{Binding Id}"/> </Grid> </ControlTemplate> </Setter.Value> </Setter> </DataTrigger> The grid looks ok. But, when the Label is clicked, it doesnt raise the Selection changed event for the DataGridRow. How do I achieve this behaviour? This label should just behave as any other DataGridRow(with the default template). Thanks

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