wpf

wpf image viewer path

I would like to make an image viewer where the client can load thumbnails to a file, then when the Photo Gallery button is selected the thumbnails appear in a grid and when the thumbnail is selected a larger photo will show in a viwbox. How do I get the path for the button click event to the photos? Can this be done in a markup ext? ...

Bind the datatable with ComboBox in WPF

Data is not Displaying in the Combo Box DataTable dt = new DataTable(); dt.Columns.Add("Code"); dt.Columns.Add("Name"); dt.Rows.Add("c1", "n1"); dt.Rows.Add("c2", "n2"); myCombo.ItemsSource = ((IListSource)dt).GetList(); myCombo.DisplayMemberPath = "Code"; myCombo.SelectedValuePath = "Name"; ...

WPF Dockpanel first child uses remaining space

In a window I have there is a list of DockPanels to specify a couple of files. Each DockPanel has a TextBox (for the path) and a button (to browse for a file). I've recreated a simple WPF page to demostrate the problem here: <Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsof...

WPF animation throws Exception "'Background' property does not point to a DependencyObject in path '(0).(1)'."

Hi I have got some WPF source: <Window x:Class="WpfApplication2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <Window.Resources> <SolidColorBrush x:Key="RedBrush" Color="Red"/> <SolidC...

VB Equivalent of the following code for threads

What is the vb.net equivalent of the following c# code? var thread = new Thread(() => { Dispatcher.CurrentDispatcher.BeginInvoke ((Action)(() => new MySplashForm().Show())); Dispatcher.Run(); }); ...

How can I draw a border with squared corners in wpf?

You know, like Battlestar paper! I have given this a few goes but now I'm stumped. I haven't yet gone down the geometery route, so I'll explain this as best as I can. I'd like the border to be sizable, but contain fixed-size corners, just like CornerRadius does. Instead of rounded corners, I'd like them to be tapered, like: /---------\...

DispatcherTimer with Window.Close causing crash.

I am writing a C# app that has a main window and a separate login window. I set a DispatcherTimer to open a new login window if the user is idle for a certain period of time. My app is crashing when i call .Close() on the login window. However, if I remove the DispatcherTimer code it works fine. Is System.Timers.Timer a better choice...

c# How to modify a ListView

Hello, I have a GUI application that has a ListView. It is used to show the log of the app. In the xaml I have the following: <ListView x:Name="lvStatus" Margin="5,5,5,5" ItemsSource="{Binding LogView}" ItemTemplate="{StaticResource StatusListTemplate}"> </ListView> In the code the listView i...

Is it possible to animate a LinearGradientBrush in WPF?

Is it possible to animate the StartPoint or EndPoint of a LinearGradientBrush? If so, what is the type of the Storyboard object used to animate the Points, as when I try the following I get "0,1" is not a valid value for Double, and I do realize I shouldn't be using the DoubleAnimationUsingKeyFrames type. Current Code: <UserControl.Tri...

Wpf styles and attached properties

Hi, I've been playing with behaviors and I came across a interesting issue. Here is my behavior: public class AddNewBehavior : BaseBehavior<RadGridView, AddNewBehavior> { public static readonly DependencyProperty IsEnabledProperty = DependencyProperty.RegisterAttached("IsEnabled", typeof(bool), typeof(AddNewBehavior), new Framework...

Using system types in XAML as resources

I have encountered a situation where it would be very useful to specify a floating point value directly in XAML and use it as a resource for several of my UI pieces. After searching around I found a good amount of information on how to include the proper assembly (mscorlib) in your XAML so you can do just that. Unfortunately, I am gett...

Graphics performance optimization issue

Here's the problem : I need to scroll a huge image of a wave form that has been rendered previously, WPF didn't let me assign that huge (80000*256) picture to an Image, it works for smaller (30000*256) images but it's so slow animating it that it's unpractical. So what I decided was to use a WriteableBitmap that I assign to my Image.So...

Deploying ODP.NET WPF application

Background: I developed a small .NET 3.5 WPF application that connects to an Oracle 9i database. Thinking that the ODP.NET version had to match the database, I downloaded and used an [older version][1] (9i, release 2, to be more specific) of the Oracle Data Access tools. I'm basically done the application now and need to deploy it. Th...

dynamic binding of rows and columns to a grid in WPF

With a DataGrid object in WPF, we can bind its rows to an observable collection such that as rows are added or removed to/from the collection, the UI updates to display the changes. I am looking to do something similar with a Grid control as part of a User Control I am trying to create. Is this possible? ...

How to get accordion region to expand (vertically) to dynamic content?

I have a main datagrid, then an accordion control below it. In one of the accordion items I have another datagrid that binds to the selected item of the first datagrid. Simple xaml is: <sdk:DataGrid Name="dgMain" ItemsSource="{Binding SomeSource}" /> <toolkit:Accordion> <toolkit:AccordionItem Header="Details"> <sdk:DataGrid ...

How can I set the initially focused element without activating the window (WPF)?

My program creates a window with ShowActivated=false, so that it doesn't steal keyboard focus when it's opened (the window is created in response to events coming over the network). I want to be able to specify that a particular TextBox field receives focus when the user switches to the window. However, the seemingly obvious methods (u...

WPF - what's wrong with this code (trying to get IsEnabled to bind to dependency property)

Hi, Any idea where I'm going wrong with this code. I wan the TextBox to be Enabled when the associated RadioButton for it is selected, and then when a different radio button is selected want it to be Enabled=False. I created a ProxyMode dependency property and have changed the getter to obtain it's bool value based on whether Proxy i...

wpf - how should I auto-grey-out a textbox when it's associated radiobutton is not selected?

Hi, What's the best approach to auto-grey-out a textbox if it's associated radiobutton is not selected? I've got an open question out re using a dependency property (which I haven't got working) for this, however I'm not sure this is the appropriate approach. So basically when RadioButton 1 is selected the text field is enabled, how...

WPF element positioning on a Canvas

I have a point on a canvas that I want to place an ellipse. I want the centre of the ellipse to be over this point. At the moment the top left most edge of the ellipse is over this point. I know I can shift the ellipse programmatically on the canvas but I was wondering if there is a way to tell WPF to centre the element over the point i...

wpf validation - how can I get this code to trigger a validation as typing occurs (cf when leaving the field)

how can I get this code to trigger a validation as typing occurs (cf when leaving the field). The code below works OK in terms of validation, however it does not work until leaving the field (not as you type). XAML <Grid.Resources> <Style TargetType="{x:Type TextBox}"> <Style.Triggers> <Trigger Property="Valida...