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• WPF RichTextBox - Formatting of typed text

  - by Alan Spark

  I am applying formatting to selected tokens in a WPF RichTextBox. To do this I get a TextRange that encompasses the token that I would like to highlight. I will then change the color of the text like this: textRange.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Blue); This is happening on the TextChanged event of my RichTextBox. The formatting is applied as expected, but continuing to type text will result in the new text inheriting the formatting that has already been applied to the adjacent word. I would like the formatting of any new text to use the default formatting options defined in the RichTextBox properties. Is this possible? Alternatively I could highlight all tokens that I don't want be blue with the default formatting options but this feels awkward to me.

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• WPF - Bind Menu Item

  - by Miguel

  Hello, I am creating a menu and binding the menu items ate runtime as follows but I am not able to make it work. I am creating the menu as follows: Menu menu = new Menu(); menu.Items.Add(new MenuItem { Command = new PackCommand(), Header = "Pack" }); DockPanel.SetDock(menu, Dock.Top); content.Children.Add(menu); And I am implementing ICommand: public static class PackCommand : ICommand { Boolean CanExecute(object parameter) { return true; } void Execute(object parameter) { Packer packer = new Packer(); packer.Run(); } } I am not sure how to bind the menu item. Why CanExecute? Shouldn't it always? I only want to run packer.Run when the buttom is clicked. I think I should implement ICommand but I am not even sure I should do this? Could someone please help me out? Thanks, Miguel

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• WPF DataGridTextColumn Can't type point for float data

  - by Alvin

  I had a WPF DataGrid and use DataGridTextColumn Binding to a Collection. The items in Collection had some float property. When my program launched, I modify the value of float property in DataGrid, if I type a integer value, it works well. But if I type char . for a float value, char . can't be typed. I had to type all the numbers first, and then jump to the . position to type char . to finish my input. So how can I type . in my situation? Thanks.

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• WPF Animation on scrollviewer children clipped by scrollviewer

  - by Becky Franklin

  Hey folks, I'm hoping I have a fairly simple problem that can be fixed easily as it seems like I'm just missing something basic from the WPF world. I have a scrollviewer wrapping a stackpanel which contains several images, these images have animations to increasing in size when the mouse passes over them. All works fine without the scrollviewer, now I've added the scrollviewer, the animation works but only inside the scrollviewer; the increasing size isn't being allowed to overlap the scrollviewer. Is there a way to fix this? Thanks, Becky

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• Scale a Visual Brush Background WPF

  - by user279244

  Hello, I have a Item called MiniMap in my xaml. I have set the background of it to a visual brush representting a canvas Item. Now, I want to scale the background to a ratio 0.7 . How can I do it? Thanks in advance <local:MiniMap Width="201" Height="134" x:Name="MiniMapItem" MinHeight="100" MinWidth="100" Opacity="1" SnapsToDevicePixels="True" Margin="0,0,20,20" VerticalAlignment="Bottom" HorizontalAlignment="Right"> <local:MiniMap.Background> <VisualBrush Visual="{Binding ElementName=viewport}" Stretch="None" TileMode="None" AlignmentX="Left" AlignmentY="Top" /> </local:MiniMap.Background> </local:MiniMap>

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• WPF NotifyIcon Help C#

  - by Sandeep Bansal

  Hi everyone. I'm having trouble with a NotifyIcon in WPF I currently have the following: notifyI = new NotifyIcon(); notifyI.Icon = new Icon("Power.ico"); notifyI.Text = "Shutdown Timer"; notifyI.Visible = true; notifyI.MouseDoubleClick += new System.Windows.Forms.MouseEventHandler(notifyI_MouseDoubleClick); The thing is the notifyI.Icon = new Icon("Power.ico") is keep throwing and exception. I can't seem to find a way to use the icon file I have in the resources, can anyone help. Thanks, I am using VS2010 and Blend 3.

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• SVG -> WPF linear gradient

  - by Otaku

  Does anyone know if there is an equilant attribute of SVG's "gradientUnits=userSpaceOnUse" in WPF for a LinearGradientBrush? I can't seem to find this. If not, does anyone know about how to calculate it in (C# or VB.NET)? For example if I have a StartPoint of 0,0 and EndPoint of 1,1 on a Rectangle that is 100x100, the angle is 45 degrees. However, when I change either the width or height of the Rectangle, for example Width=150, the axis is no longer at 45 degrees. How could I calculate to keep the angle at 45 degrees in a rectangle that is not a square so that it runs from bottom left to top right corner for a middle gradientstop.

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• Adding programatically a command to a listbox in WPF

  - by ajtp

  In my WPF application there is a listbox with items. The listbox is populated via a xmldataprovider from XAML and then binding it to Itemssource property of the listbox. Well, from XAML, I bind a comand to the listbox by doing: <ListBox.CommandBindings> <CommandBinding Command="{x:Static local:mainApp.MyCmd}" CanExecute="CanExecute" Executed ="Executed" /> </ListBox.CommandBindings> but I don't know how to programatically bind a command to each listboxitem. How to do it? Thanks in advance.

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• [WPF] Format datagrid row foreground depends on data

  - by ktutnik

  Hi everyone, Im new in wpf, i though it was an easy task. i searched in the internet but not lucky to found any help regarding this problem. <Style TargetType="{x:Type DataGridRow}"> <Setter Property="Foreground" Value="{Binding Converter=conditionToColorConverter}"/> </Style> the problem is how to pass the row data to the value.. the converter will return RED or BLACK color when specified properties of the row data match some category. or maybe there is an easy way to do that? Thanks in advance Kin

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• WPF: Changing config file user settings at runtime?

  - by Poku

  Hey I'm trying to change some config file user settings values in my WPF application, but its only working partly. The value is changed correctly and the program runs fine with the value. I can even restart the program and the value is still the one i changed it to. The problem is that when i open the .exe.config file the value is still the old value. Im using this code to change the value: Properties.Settings.Default.ProjectNumber = varTestExample; Properties.Settings.Default.Save(); Where does this save code save the changes and how/where does the program read the value after i have run this code? If i run a clean version of the program the ProjectNumber value is correctly taken from the .exe.config file and if i change the value in the config file it is also change when i run the program. But as soon as i run the above code the program is not reading the value from the config file. Why?

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• WPF Application doesn't work on some machines: Stopped working error

  - by Hun1Ahpu

  My WPF application works fine on a number of machines, but now I get a report about this error on a user machine: Description: Stopped working Problem signature: Problem Event Name: CLR20r3 Problem Signature 01: mysoftware.exe Problem Signature 02: 1.0.0.1 Problem Signature 03: 4bbcd9d9 Problem Signature 04: PresentationFramework Problem Signature 05: 3.0.0.0 Problem Signature 06: 4a174fbc Problem Signature 07: 624f Problem Signature 08: e1 Problem Signature 09: System.Windows.Markup.XamlParse OS Version: 6.1.7600.2.0.0.256.48 Locale ID: 1033 I was trying to catch Exception using Application DispatcherUnhandledException but this didn't help. And warping Window1 constructor in try/catch block too. .NET Framework 3.5 is installed on that machine. How can I figure out the reason of crashing: log this error, debug, ...?

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• Edit dialog, with bindings and OK/Cancel in WPF

  - by Erik

  How can i have a dialog for editing the properties of a class with binding, and have OK-Cancel in the dialog? My first idea was this: public partial class EditServerDialog : Window { private NewsServer _newsServer; public EditServerDialog(NewsServer newsServer) { InitializeComponent(); this.DataContext = (_newsServer = newsServer).Clone(); } private void ButtonClick(object sender, RoutedEventArgs e) { switch (((Button)e.OriginalSource).Content.ToString()) { case "OK": _newsServer = (NewsServer)this.DataContext; this.Close(); break; case "Cancel": this.Close(); break; } } } When in the switch, case "OK", the DataContext contains the correct information, but the originally passed NewsServer instance does not change.

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• Disable CTRL+P in WPF DocumentViewer

  - by Groupal

  I'm working on a new presenation component for one of our applications. I am building a Custom WPF Control that just has a DocumentViewer in it and hosting that CC in a Windows Forms application with an ElementHost. I'm using Visual Studio 2008 with C#. I have customized everything through the XAML to give it the look and feel that integrates it perfecting into our application, but one thing remains... If you press CTRL+P the print dialog still comes up. I'm at a complete loss as to how to disable that fuction. The use of this CC is to allow the users to pull up and view the Manuals for the systems installed at that site, but we don't want them to accidently print them (100s of pages). Please help, -G

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• Memory leak in WPF app due to DelegateCommand.

  - by Abdullah BaMusa

  I just finished desktop apps written in WPF and c# using MVVM pattern. In this app I used Delegate Command implementation to wrap the ICommands properties exposed in my ModelView. The problem is these DelegateCommands prevent my ModelView and View from being garbage collected after closing the view. So it stays larking until I terminate the whole application. I profile the application I find it’s all about delegatecommand that keeping the modelview in memory. How could I avoid this situation and is this in nature of mvvm pattern, or it’s about my implantation of the pattern?. Thanks

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• WPF Prism MVVM, Internationalized Wizard Passing model data between the wizard steps

  - by Nick V

  I've found the following example of a wizard located here: http://www.codeproject.com/Articles/31837/Creating-an-Internationalized-Wizard-in-WPF Now I've spent quite some time looking at the example and i understand pretty much everything. But i can't figure out how he passes an object between the different modelViews. And as you can imagine that step is quite crucial.. In the example he uses an CupOfCoffee Object in the main wizardviewmodel and somehow manages to adjust it throughout the wizard. But i cant see anywhere how he does that. I've already tried to recreate a project like he has but no success. Could anyone tell me how he passes the objects between the different viewModels?

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• Best way to implement a Parsing/Editable Richtextbox in WPF

  - by lozzar

  I'm trying to implement (as a prototype initially), a richtextbox control which can be parsed in real time to apply certain formatting options to it. This is being done in WPF so I thought the best way to go about it would be to extend the existing rich text box control. I've run into the issue where it isn't documented well and the examples are quite slow (the ones I found have parse the whole document on every keystroke). The way I've currently decided to go about it is to create a custom Inline element which can hold the formatting tags, and the contents. Hence I only have to parse the current paragraph and the runs in that paragraph for formatting tags. Is there a better way to achieve this? Note this isn't for code/syntax based documents (so AvalonEdit isn't appropriate). Cheers

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• WPF: Setting toolbar button sizes using a Style

  - by Allen Ho

  I have buttons on a toolbar in WPF. When I do the XAML: <ToolBar.Resources> <Style TargetType="{x:Type Button}"> <Setter Property="Width" Value="21"></Setter> <Setter Property="Height" Value="21"></Setter> </Style> </ToolBar.Resources> None of the buttons on the toolbar set their sizes accordingly. I have to go to each button and manually set their widths and heights to the desired values. Any idea why the Style on the toolbar does not work?

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• WPF User Control - Round corners programmatically

  - by morsanu

  Another WPF question... <UserControl x:Class="TKEApp.Components.UserControls.ButtonControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Grid Background="Black"> <TextBlock Foreground="White" Background="Brown" Name="lblCaption" TextAlignment="Center"></TextBlock> </Grid> </UserControl> Somwhere in the application code I have an instance of this control and I need to make it's corners rounded programmatically. Is this possible?

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• embed google map in wpf control

  - by Dave Turvey

  Hi, I am trying to create a wpf control that will display a map image using google maps. I want to be able to centre the map on a longitude and latitude specified by the application. Ideally, the control will then allow the user to move a map marker and store the latitude/longitude of the marker in the application. The only way I can think of doing this is to use a WebBrowser control and create a HTML string at runtime that shows a map of the desired location. This seems like an awkward solution and won't allow me to easily retrieve the marker location. Does anyone know of a better way to accomplish this?

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• 3D Triangle - WPF

  - by user300423

  I am trying to apply an image brush to a Triangle in WPF without success. What am i doing wrong? This is my attempt: Dim ModelTri As New MeshGeometry3D ModelTri.Positions.Add(New Point3D(0, 0, 0)) ModelTri.Positions.Add(New Point3D(100, 0, 0)) ModelTri.Positions.Add(New Point3D(100, 100, 0)) Dim MeshTri As New MeshGeometry3D MeshTri.TriangleIndices.Add(0) MeshTri.TriangleIndices.Add(1) MeshTri.TriangleIndices.Add(2) 'Texture Dim TexturePoints As New PointCollection TexturePoints.Add(New Point(100, 0)) TexturePoints.Add(New Point(0, 100)) TexturePoints.Add(New Point(100, 100)) MeshTri.TextureCoordinates = TexturePoints 'Image Brush Dim imgBrush As New ImageBrush() imgBrush.ImageSource = New BitmapImage(New Uri("Mercury.jpg", UriKind.Relative)) imgBrush.Stretch = Stretch.Fill imgBrush.TileMode = TileMode.Tile imgBrush.SetValue(NameProperty, "imgBrush") Dim Mat As Material Dim DMaterial As New DiffuseMaterial DMaterial.Brush = imgBrush Dim Bind As New Binding("imgBrush") Bind.Source = imgBrush BindingOperations.SetBinding(DMaterial, BindingGroupProperty, Bind) 'This doesnt work Mat = DMaterial 'This works 'Mat = New DiffuseMaterial(New SolidColorBrush(Colors.Khaki)) Dim triangleModel As GeometryModel3D = New GeometryModel3D(ModelTri, Mat) Dim model As New ModelVisual3D() model.Content = triangleModel Viewport.Children.Add(model)

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• WPF dependency property setter not firing when PropertyChanged is fired, but source value is not cha

  - by Sandor Davidhazi

  I have an int dependency property on my custom Textbox, which holds a backing value. It is bound to an int? property on the DataContext. If I raise the PropertyChanged event in my DataContext, and the source property's value is not changed (stays null), then the dependency property's setter is not fired. This is a problem, because I want to update the custom Textbox (clear the text) on PropertyChanged, even if the source property stays the same. However, I didn't find any binding option that does what I want (there is an UpdateSourceTrigger property, but I want to update the target here, not the source). Maybe there is a better way to inform the Textbox that it needs to clear its text, I'm open to any suggestions.

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• I need to create a small HMI/SCADA WPF application that uses WCF

  - by HomeMade

  Hello I have to create a simple app, that will suit as an example of using WPF and WCF for creating HMI screens. I'm not sure what WCF is supposed to do in such application, I guess there must be an OPC server that my application connects to. Does app connect to OPC server using WCF service and does the WCF service reside inside the application or outside? Is WCF service meant to be used only as a connection to OPC server? I'm not yet quite sure which process to simulate, I need something simple. Please, any ideas are welcomed. Thank you

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• WPF - styling comboboxes

  - by devdigital

  Hi, I'm trying to style Comboboxes in WPF so that they are white, and have the same border as TextBoxes. I have the following style so far, but don't know how to set the border: <Style TargetType="ComboBox"> <Setter Property="Margin" Value="0,2,0,2" /> <Setter Property="VerticalAlignment" Value="Center" /> <Setter Property="Background" Value="White" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ComboBox}"> ??? </ControlTemplate> </Setter.Value> </Setter> </Style>

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• capture MouseEnter / MouseLeave on Image in WPF TreeViewItem

  - by pileggi

  Hi! I've done my TreeView all with XAML but now I'd like to manage an event with code-behind and I don't know how. The HierarchicalDataTemplate contains an Image. I need to capture the events MouseEnter / MouseLeave on the Image. I've tried in this way: <Image x:Name="imgArticolo" Source="{Binding imgArt}"> <Image.Style TargetType="{x:Type Image}"> <Style> <EventSetter Event="MouseEnter" Handler="iArt_MouseEnter"/> </Style> </Image.Style> </Image> But it doesn't work: error: "MouseEnter member not recognized or not accessible" (from italian) Can you, please, help me? Thank you! Pileggi

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• Silverlight like login/register control in WPF

  - by user293545

  If you have created a silverlight business application you will see that in the top righthand corner on the menu is a login hyperlink. Pressing it opens up a childwindow that displays a login control, within that control is another hyperlink that says "Register" if you press it, it flips the control 180 degrees around from the login control to the register control. I really like this type of animation and want to do something similar in WPF for a project I am working on. However I am not sure how to do it, has anyone done this or knows where I can find some more information on how to achieve it? Thank you

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