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  • Conditionals in WPF.

    - by Carlos
    I have the following question: I have a Boolean variable in a configuration file. If it is true I want a property in textbox control to be setup according to the value of that variable. Try the solution above but it does not work. What am I doing wrong? This is a fragment code: bool isKeyboardAvtive = true; //read from configuration file .... .....

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  • WPF: change DataTemples according to Value

    - by Kave
    I have a class called Cell with two properties. One is called Value of type int? And the other is called Candidates of type ObservableCollection during the initialization I am utilizing a DataTemplateSelector to choose between two datatemplates for two different scenarios. If the Value property has a value then template A should be used to present the Cell class. However if the Value property is null Then template B should be used to present the Cell class. While this works perfectly fine during the initialization however during the runtime the templates don't change any more when the value of the Value property actually changes. Is the approach of using DataTemplateSelector the wrong approach to change DataTemplates dynamically? What would you recommend I should do? Many thanks,

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  • How to Focus on ListviewItem in WPF?

    - by Prashant
    I have ListBox in my application with Ten items, user can see five items at time. Sometimes I'm selecting items from code and setting focus. Selecting an item and focusing work perfectly when items are visible on Form, but for other non-visible items, I'm unable to set the focus (NOTE: after selecting it is visible to user). Can anyone help me please?

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  • Adding a button to a combobox in wpf

    - by Chris McGrath
    Pretty much I have an Editable Combobox and I want to add a button to the right of the drop down button which clears the selected item. So... |TextBox |X|v| I was thinking something like... <Style...> <Setter Property="Template"> <Setter.Value> <ControlTemplate> <ControlTemplate.Resources> <Style TargetType="{x:Type TextBox}">...Add button here...</Style> </ControlTemplate.Resources> <ContentPresenter /> </ControlTemplate> </Setter.Value> </Setter> </Style>

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  • Keeping WPF grids from getting out of parent bounds

    - by Jonathan Perry
    In my UI, I have a big grid with two columns and one row. in the right column, I have a grid with three rows where in the top row I have a user control, and in the two bottom rows I have two Expander objects, each containing an ItemsControl with a list that gets populated in runtime. Sometimes, that list gets really long and "spills" from the screen towards the bottom. What I want to do is to allow the user to see both expanders, be able to expand or collapse them while keeping them both in sight. I tried wrapping them in WrapPanels or StackPanel but to no avail. Here's some code to help explain my problem: <Grid Grid.Row="1" x:Name="grid1"> <Grid.RowDefinitions> <RowDefinition Height="*" /> <RowDefinition Height="*" /> </Grid.RowDefinitions> <Expander Grid.Row="0" Header="Expander 1" x:Name="expander1" FontSize="14" IsExpanded="True"> <Expander.Background> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FFC4C4C4" Offset="0" /> <GradientStop Color="White" Offset="1" /> </LinearGradientBrush> </Expander.Background> <ContentPresenter Content="{Binding ViewModel.OpenAlerts, ElementName=m_viewControl}" ClipToBounds="True"/> </Expander> <Expander Grid.Row="1" x:Name="expander2" Header="Expander 2" FontSize="14" IsExpanded="True"> <Expander.Background> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FFC4C4C4" Offset="0" /> <GradientStop Color="White" Offset="1" /> </LinearGradientBrush> </Expander.Background> <ContentPresenter Content="{Binding ViewModel.ClosedAlerts, ElementName=m_viewControl}" ClipToBounds="True"/> </Expander> </Grid> Any assistance or tips will be highly appreciated! Thanks, John.

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  • Problem with focus in WPF

    - by Maurizio Reginelli
    I have an application with a WindowsFormHost, which contains an user control, and a DataGrid. When I hold down the left button on the user control, if the selection on the DataGrid changes (via data-binded property), I lose the focus. How can I solve that problem? Thank you.

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  • Get the caret position when losing focus in WPF

    - by DrLazer
    I have two textbox's. I have an event setup for the "onLostFocus" of the textbox's. If i finish typing a word into both boxes one after the other all is well. At the point where i click back on the first textbox i want to click halfway through the word (perfectly resonable thing for a user to do). When the onLostFocus event fires here is my code : void tbox_LostFocus(object sender, RoutedEventArgs e) { IInputElement focusedelement = FocusManager.GetFocusedElement(this); if (focusedelement is TextBox) { TextBox focusedTextBox = focusedelement as TextBox; int focusIndex = m_commandsStacker.Children.IndexOf(focusedTextBox); int caretIndex = focusedTextBox.CaretIndex; The caret index is 0. At that point I refresh the whole form and set parameters and all other kinds of whizzery, storing the texbox index and caret position to put everything back the same. Why does it return 0 and not the position where the caret should be halfway between the word?

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  • How to structure class to support imported 3d model ?

    - by brainydexter
    Hello, I've written a C++ library that reads in this 3d model file (collada DAE). uptil now, I would output a list of triangles and handle each at rendering stage. But now, I need to attach some Bounding sphere information with the imported model. I need some advice on how should I organize this in code. Here are some specs of the 3D file format: - 3D model is represented as a Tree consisting of nodes - each node can contain other nodes, geometry information, transformation etc My requirements: - a bounding sphere associated with each node, thereby yielding a tree of bounding sphere hierarchy for the model itself. - actual vertex information What would be the recommended way to deal with this situation? Thanks

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  • wpf error template - red box still visible on collapse of an expander

    - by Andy Clarke
    Hi, I'm doing some validation on the DataSource of TextBox that's within an Expander and have found that once a validation error has been triggered, if I collapse the Expander, the red box stays where the TextBox would have been. <Expander Header="Blah Blah Blah"> <TextBox Name="TextBox" Validation.ErrorTemplate="{DynamicResource TextBoxErrorTemplate}" Text="{Binding Path=Blah, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" /> </Expander> I've tried to get round this by binding the visibility of the Error Template to the Expander, however I think there's something wrong with the binding. <local:NotVisibleConverter x:Key="NotVisibleConverter" /> <ControlTemplate x:Key="TextBoxErrorTemplate"> <DockPanel> <Border BorderBrush="Red" BorderThickness="2" Visibility="{Binding Path=IsExpanded, Converter={StaticResource NotVisibleConverter}, RelativeSource={RelativeSource AncestorType=Expander}}" > <AdornedElementPlaceholder Name="MyAdorner" /> </Border> </DockPanel> <ControlTemplate.Triggers> <Trigger Property="Validation.HasError" Value="true"> <Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=(Validation.Errors)[0].ErrorContent}"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> I guess I've gone wrong with my binding, can someone put me back on track please? Alternatively does anyone know another solution to the ErrorTemplate still being visible on the collapse of an Expander?

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  • Saving a screenshot of a window using C#, WPF, and DWM

    - by Evan
    This is a follow up question to this question The solution to the above uses DWM to display a thumbnail of an active window. If I understand correctly, it works by letting you specify the window handle of the application you want to view and then having you provide a window handle and a location on that window where windows should draw the contents of the target Window. Is there a way to render the window screen shot directly to BitmapImage or Image instead of directly drawing it somewhere in your window? (Basically to just grab a screen shot of the window - even if it's covered by another window - with out using an updating thumbnail.) Thanks for you help!

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  • Interpreting WPF Dependency properties as a set.

    - by moogs
    So, I have a control. It displays an image based some xml document and an optional parameter "Document" - XML document "RenderingOption" - optional image-rendering ( sharpen, soften ) So: <XMLRenderingWidget Document="xxxxxx"/> The above will render the document once <XMLRenderingWidget Document="xxxxxx" RenderingOption="Sharpen"/> The above will, sometimes render the document once, more oftentimes: Perform the rendering of the document as if no Rendering was set then, re-render the document with the Sharpen option I do the rendering on the PropertyChangedCallback assigned to the property. How do I tell the control to "hey, before doing the rendering, apply the changes on the other properties being set, too" Is this not possible? Should I bundle them up as one property instead?

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  • WPF scrollview scrolled to the bottom default

    - by code-zoop
    I have a scrollview containing a ListBox. I would like the scrollview to scroll all the way to the bottom by default when the view has been loaded! This because the most recent element is always the last element in the ListBox. Is there an easy way to achieve this behavior? Thanks

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  • WPF Template: AdornedElement not showing!

    - by Tau Sick
    I want to add some elements to a TextBox by using a Template with the extra elements and the original TextBox inserted in the right spot. I'm trying to use the AdornedElementPlaceholder just like you would do when making a Validation.ErrorTemplate But the AdornedElement is not showing up. I have simplified the example as much as possible: <TextBox Text="Border me with my Template"> <TextBox.Template> <ControlTemplate TargetType="{x:Type TextBox}"> <Border BorderBrush="Green" BorderThickness="1"> <AdornedElementPlaceholder/> </Border> </ControlTemplate> </TextBox.Template> </TextBox> The result is just a green box around the space that should be my textbox!

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  • Get rid of button border in WPF?

    - by sanjeev40084
    i am trying to get rid of button border and only display text, however a thin line around the text gets displayed even though i set borderThickness to 0 and borderbrush to transparent. my xaml code for save button: <Button Content="save" Name="btnSaveEditedText" Background="Transparent" Foreground="White" FontFamily="Tw Cen MT Condensed" FontSize="30" Margin="-280,0,0,10" Width="60" BorderBrush="Transparent" BorderThickness="0"/> Is there anyway i can get rid of the button border?

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  • Wpf binding with nested properties

    - by byte
    ViewModel I have a property of type Member called KeyMember. The 'Member' type has an ObservableCollection called Addresses. The Address is composed of two strings - street and postcode . View I have a ListBox whose item source need to be set to ViewModels's KeyMember property and it should display the Street of all the Past Addresses in the collection. Question My ViewModel and View relationship is established properly. I am able to write a data template for the above simple case as below <ListBox ItemsSource="{Binding KeyMember.Addresses}"> <ListBox.ItemTemplate> <DataTemplate DataType="Address"> <TextBlock Text="{Binding Street}"/> </DataTemplate> </ListBox.ItemTemplate> </ListBox> How would I write the DataTemplate if I change KeyMember from type Member to ObservableCollection< Member assuming that the collection has only one element. PS: I know that for multiple elements in collection, I will have to implement the Master-Detail pattern/scenario.

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  • Style the MouseOver on a Silverlight/WPF button

    - by mattruma
    Struggling with styling the mouse over for a button ... I have managed to style the button (solid red), but I would like for it to change to solid black whenever a mouse over occurs. I am new to XAML, and I can see that it wants some type of story board/animation ... not sure exactly how to do this. Any help would be greatly appreciated.

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  • Nested WPF DataGrids

    - by jvberg
    I have a DataGrid (from the toolkit) and I want to nest another DataGrid in the DataGrid.RowDetailsTemplate. The trick is I want to bring back the data from one table in the main grid and then based on row selection go and get additonal detail from a different table and show it in the DataGrid in the detail template. This is easy enough to do in 2 seperate DataGrids but I am having trouble getting it to work with the nested version. Is this even possible? If so, could someone point me in the right direction. I should note I am using LinqToSql clases to populate the data. Thanks for your consideration. -Joel

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  • How to make a WPF ComboBox editable with custom values

    - by Liam
    I would like to have a combobox that allows selection from a list of values and also allow a custom value from the typed in text. For display reasons the items are a complex type (lets say the combobox item template displays a patch of color and a flag indicating if it is a custom color). public class ColorLevel { public decimal Intensity { get; set; } public bool IsCustom { get; set; } public Color BaseColor { get; set; } public override ToString() { return string.Format("{0}", Intensity*100); } } Example items var items = new [] { new ColorLevel { Intensity = 0.9m, IsCustom = false, BaseColor = Color.Red }, new ColorLevel { Intensity = 0.7m, IsCustom = false, BaseColor = Color.Red } } XAML <ComboBox SelectedItem="{Binding Path=SelectedColorLevel}" IsEditable="true" IsTextSearchEnabled="true"> </ComboBox> So the above markup works when an item is selected from the item list. And as you type with the text search the matching items are selected. If the typed text doesn't match an item then the SelectedColorLevel is set to null. The question is at what point (and how) is it best to create a new custom item that can be set to the SelectedColorLevel when the typed text doesn't match an item. For example I would want to assign a new item to the selected value such as new ColorLevel { Intensity = decimal.Parse(textvalue), IsCustom = true } or using an appropriate converter and databinding to the Text property.

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  • Menu not showing tooltip in C# wpf

    - by swapnil
    i have this code <MenuItem Header="{localization:Translate NewChart}" ToolTip="Ctrl+h" Command="{Binding AddChartCommand}"> <MenuItem.Background> <RadialGradientBrush RadiusX="0.768" RadiusY="0.783"> <GradientStop Color="#FF2b2b2b" Offset="1"/> <GradientStop Color="#FF515151" Offset="0.388"/> </RadialGradientBrush> </MenuItem.Background> </MenuItem> I don't understand why i can't see the toottip when i take mouse over the menu item.

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  • C# WPF Slider Issue with IsMoveToPointEnabled

    - by Kirk
    I have IsMoveToPointEnabled on for my Slider, so when I click anywhere on the component the selector moves to my mouse. The problem is if I have this option on and click and hold the mouse down to drag the selector the selector doesn't move. Anyone know how to fix this?

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  • How to get a ListView (or DataGrid) work with TextWrapping (WPF)

    - by Aks1
    I mean, i have one of this controls and text inside one of it's columns. Usually if user changes column size, it's just cutting text. If I'm trying to use template with textblock or textbox and set TextWrapping="Wrap" inside of the template - it's really doesn't change anything. What's the way out? *And yes, I searched before asking, and found similar questions on this site. But without answer ((( *

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  • wpf keep base style in custom control

    - by Archana R
    Hello, I have created a custom button as i wanted an image and a text inside it as follows: <Style TargetType="{x:Type Local:ImageButton}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Local:ImageButton}"> <StackPanel Height="Auto" Orientation="Horizontal"> <Image Margin="0,0,3,0" Source="{TemplateBinding ImageSource}"/> <TextBlock Text="{TemplateBinding Content}" /> </StackPanel> </ControlTemplate> </Setter.Value> </Setter> </Style> Here, ImageButton is a class which inherits from Button class and has ImageSource as a dependency property. But i want to keep the look and feel of the original button. How can i do it? Thanks.

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