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  • Tiling rectangles seamlessly in WPF while maintaing subpixel accuracy?

    - by Jens
    I have had the problem described in the question Tiling rectangles seamlessly in WPF, but am not really happy with the answers given there. I am painting a bar chart by painting lots of rectangles right next to each other. Depending on the scale of the canvas containing them, there are small gaps visible between some of them as a result from sub-pixel rendering. I learned from the above question how to make my rectangles fit with the screen pixels, removing that effect. Unfortunately, my chart may display way more bars than there are pixels. Apart from the tiny gaps (which manifest as a periodic change in color saturation), this works well. If I snap each bar with the screen pixels, most of the bars vanish, though, so I am looking for another solution. Thanks in advance!

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  • WPF MVVM: How do ViewModels communicate with each other?

    - by Dev1
    I have a View which has 2 sub views on it and a ViewModel is assigned to each view: ViewA - ViewModelA { ViewB - ViewModelB ViewC - ViewModelC } ViewB has a text box and ViewC has a combobox, both of which i need access from ViewModelA. Not the GUI control itself, but the bound value i.e. .Text of the textbox and .SelectedItem of the ComboBox. Currently i just have ViewModelB and ViewModelC as properties on ViewModelA but it feels wrong. What's the standard way for view models to communicate with each other without breaking the MVVM pattern? I'm completely new to WPF/MVVM.

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  • wpf: How to keep an image stay in its original size?

    - by Martin Luo
    hi, guys! i have a problem about the image display in wpf. here's my code <Button HorizontalAlignment="Left" Grid.Column="1" Grid.Row="5" Margin="0,5"> <Button.Content> <StackPanel Orientation="Horizontal" Margin="10,0"> <Image Source="/images/user_add.png" Stretch="None" HorizontalAlignment="Center" VerticalAlignment="Center" Width="24" Height="24" /> <TextBlock Text="??" /> </StackPanel> </Button.Content> </Button> i hava the image with original size 32*32, but when i ran the above code, the image will stretch to fill all the space, beyond its original size, and i also set the "Stretch" property to "None", but it seems that it doesn't work. so, how can i fix this problem? thank u~~~!

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  • Any idea about WPF ScrollViewer to make it smooth scroolling like Android?

    - by jimi
    I have trying a simple ScrollViewer in xaml like below: <ScrollViewer Height="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type StackPanel}}, Path=Height}" ScrollViewer.VerticalScrollBarVisibility="Visible" CanContentScroll="True"> <DockPanel> <StackPanel Name="StackPanel1" OverridesDefaultStyle="False" Width="230" Height="803" VerticalAlignment="Top" HorizontalAlignment="Left" Margin="23,1,0,0"> ....Something here ....Something here ....Something here </StackPanel> </DockPanel> </ScrollViewer> But my question is..is it possible for us to create any smooth scrolling likes any android or iphone using WPF? Any ideas?

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  • How do I write to command line from a WPF application?

    - by ben
    Hi I know how to write to console but if I write to console in my program and call my program from the command line it won't display anything. How do I make it so that when I say Console.WriteLine or Console.Out.Writeline ir prints to the command prompt from which it was called and not somewhere else? Once again I know how to do Console.WriteLine so it's not that :-p unless I'm doing it wrong. From what I can tell it's probably something to do with Console.SetOut(TextWriter t) this is a WPF application and I need it to post its data to the command line while still retaining the GUI at startup. I've triple checked and my code hits the print lines, I can actually see the lines being printed to the Visual Studio output window, it just won't display in the command line when I run it manually without VS. If possible I need to conditionally have the console display. ie if run from command line (or even with command arguments), display or post to the prompt, otherwise do not.

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  • How should i draw text and shapes in wpf and C#?

    - by peterhu
    I want to do basic WPF graphics, i.e. rectangles, lines, circles and text. When should I use Drawing and when should I use a DrawingVisual? I have some code that uses Drawing and I render those to a DrawingImage and display that in an image control. Is this the right way? I could not see how to add text to a drawing. I had trouble positioning it too. Should I be rendering to a Canvas? I have some code that uses DrawingVisual and writes to a DrawingContext. That is like WinForms. Is this the recommended way? Do you have any high level advice on which APIs to use for basic graphics and labels? Will they options work on Silver Light and Desktop?

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  • WPF Binding to Items within a collection? (or converter with parameters)

    - by Sonic Soul
    i am using a WPF DataGrid, and in my Details row, i would like to show separate objects within a sub collection of each grid item. Is it possible to have a finer control of Path? for example something like... Path=SubCollection['ItemX'] etc.. also, if i was to use a converter, i don't want to have to create a separate converter for each item.. so would there be a way to supply a parameter to a converter that could than determine which collection item to return??

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  • Writing a custom wpf 'rolling' plot control (are there any components with such functionality?)

    - by adrin
    I need a wpf plot control that would 'roll' (scroll) as data is fed to it (instead of stretching, etc). Unfortunately i didnt find a working component so now I am considering writing my own control (its plotting features need to be simple). Did anyone write a custom plot/chart control? Is it difficult? What container should I use (Canvas & ViewBox?) so that it is reasonably fast, easy to write and scales as window is resized?

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  • Why the data binding in this validation example works in WPF?

    - by MartyIX
    I'm wondering how exactly the XAML sample (MSDN sample) works: <Style x:Key="textBoxInError" TargetType="{x:Type TextBox}"> <Style.Triggers> <Trigger Property="Validation.HasError" Value="true"> <Setter Property="ToolTip" Value="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=(Validation.Errors)[0].ErrorContent}"/> </Trigger> </Style.Triggers> </Style> Questions: (Validation.Errors)[0].ErrorContent - Is this code somehow checked by WPF? Because Validation.Errors may be an empty collection and in ordinary C# code this code may throw an exception. If this data-binding returns null for valid input - the null value is then casted to empty string (in a text control for example)? The index 0 corresponds to the first error message. How can I return more error messages from Validate method? Thank you for responses!

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  • Make a WPF circular progress indicator / loading animation

    how to make a WPF circular progress indicator that resembles Silverlights loading animation  read moreBy Michael DetrasDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • WPF custom control derived from ComboBox that shows a Data

    Create a custom WPF control that derives from ComboBox and create a property where its value will be used as the content of the dropdown  read moreBy Michael DetrasDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • A Simple but Robust WPF Report Engine, Part 1

    a simple WPF report engine that is robust and one can use it in practical applications  read moreBy siyamand ayubiDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • EXIF Compare Utility using WPF

    The Exif Compare Utility is a WinDiff equivalent for image files that compares the Exif meta-data and displays the differences and similarities. The application is written using WPF and MVVM.

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  • how to build a simple database application using WPF

    Build a simple database application with WPF that can display data in GridView and can perform ADD, UPDATE and DELETE operations on SQL server database.  read moreBy Kirtan PatelDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • WPF Wonders: Using DataTemplates

    WPF data templates let you determine the pieces a repetitive control uses to display its items. Learn some unique and interesting ways to use data templates for displaying the items in ListBoxes, ComboBoxes, and ListViews.

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  • Activating a pane in the Docking control for WPF and Silverlight

    Telerik Docking control for Silverlight and WPF. In this blog post I will guide you through the implementation of a simple method that accomplishes this task and an example in which you could try it out. Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Sample WPF application consuming Bing Maps Web Services

    Here is a sample WPF application, that consumes GeocodeService, SearchService, ImageryService and RouteService that are part of Bing Maps web service...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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