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• How do I customize the ASP.Net Bubble Event to pass an additional variable?

  - by CowKingDeluxe

  I am using BubbleEvent to give events from a web user control to its parent (which is a Default.aspx with code behind page). I would like to use BubbleEvent to not only pass the sender and event, but also an integer or another variable. Is there a way to add a parameter to the BubbleEvent, or is there a different way I should be approaching this?

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• Why attached property Set and Get static methods are not called in XAML?

  - by JD

  Hi, I have set break points on my attached properties SetXXX and GetXXX static methods. In Xaml, I have assigned values to the attached property. However, I was expecting the Set or Get static methods to be called but they are not. The attached property works as expected and if I call SetXXX and GetXXX methods in code, then it works are expected. Why are the methods not called when set from Xaml? JD.

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• How to make margin be relative to the center of the UIElement and not its top-left corner in a Grid?

  - by Nockawa

  I'd like the Margin property to reference the center of the UIElement and not the top-left corner. That way when I change the width/height of the UIElement it stays in the same spot. Is there a way to configure this behavior or I'll have to rely on Binding to make the adjustment ? Thanks. For instance if I change the Width/Height of the following rectangle, its center will move. <Grid> <Rectangle Fill="#FF991C1C" Width="10" Height="40" HorizontalAlignment="Left" Margin="90,161,0,0" VerticalAlignment="Top"/> </Grid>

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• Parameterized constructor in view model not working

  - by rajcool111

  I have one small issue. in my view model parameterized constructor is not working. while debugging i observed that default constructor get hit but it never triggers my parameterized constructor. How I can get my parameterized constructor working? public EmployeeRequestViewModel(IEventAggregator eventAggregator, IContextManager contextmanager):this() { _contextmanager = contextmanager; _eventAgg = eventAggregator; _eventAgg.GetEvent<EmployeeEvent>().Subscribe(EventTask); } public EmployeeRequestViewModel() { LoadEmpRequest(); }

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• Resolution Free Application

  - by Asim Sajjad

  What is meant by the Resolution free application, As I have discussed it with many of my friend and they says that resolution free mean what ever resolution user want to see an application it should adjust it position, the resolultion is monitor resolution or any say 100 by 100 what is resolution?

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• How can I change the TreeView Icon into a folder icon?

  - by KDP

  I'm trying to change the icon of my TreeView in a folder icon. Also when it collapses it needs to have an opened folder icon. My treeview has databound items in it and the code is: <TreeView x:Name="TreeViewCategories" Grid.Row="0" Grid.Column="1" Height="610" HorizontalAlignment="Left" Margin="29,111,0,0" VerticalAlignment="Top" Width="315" BorderThickness="0" Background="Transparent" > <TreeView.ItemTemplate> <HierarchicalDataTemplate ItemsSource="{Binding Items}"> <TextBlock FontSize="20" Text="{Binding Name}" PreviewMouseDown="TextBlock_PreviewMouseDown"/> </HierarchicalDataTemplate> </TreeView.ItemTemplate> </TreeView> Also this is how I fill the treeview with items from XML (It's a snipped out of alot of code: private void LoadHospitalXML() { try { FileStream fs = new FileStream("ConfigOrgHospital.xml", FileMode.Open, FileAccess.Read); var xml = XmlReader.Create(fs); rootElement = ConvertHospitalData(xml); this.TreeViewCategories.ItemsSource = null; List<HospitalWrapper> li = new List<HospitalWrapper>(); var hosp = rootElement.Items.FirstOrDefault(); if (hosp != null) { foreach (var i in hosp.Hospital) { li.AddIfNotNull(CreateHospList(i)); } } this.TreeViewCategories.ItemsSource = li; } catch (Exception e) { MessageBox.Show(e.Message); } } private HospitalWrapper CreateHospList(object obj) { var newItem = new HospitalWrapper(); newItem.Context = obj; //Hospital Names// if (obj is HospitalDataHospitalsHospital) { var hosp = (HospitalDataHospitalsHospital)obj; //newItem.Title = "Hospitals"; newItem.Name = hosp.DefaultName; var tmp = new HospitalWrapper(); tmp.Name = "Sites"; tmp.IsTitle = true; if (hosp.Sites != null) foreach (var i in hosp.Sites) { tmp.Items.AddIfNotNull(CreateHospList(i)); } newItem.Items.Add(tmp); tmp = new HospitalWrapper(); tmp.Name = "Specialties"; tmp.IsTitle = true; if (hosp.Deps != null) foreach (var j in hosp.Deps) { tmp.Items.AddIfNotNull(CreateHospList(j)); } newItem.Items.Add(tmp); } }

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• TextBox data binding validation

  - by Koynov

  *Is it possible to get validation errors(produced by the binding source through IDataErrorInfo or INotifyDataErrorInfo) *without accessing data source? The point is to get the error message which is going to be displayed. Thank you in advance.

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• Delay KeyUp Action if User is Typing (C#)

  - by Kirk

  I have a function that is being called when the user is typing in a search box. I want to wait for the user to finish typing before I actually execute the function. I know how to easily accomplish this in JavaScript with timeouts, but how would I go about doing the same thing in C#? Also, how long should I wait before I assume the user is done typing? 100ms?

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• Issue displaying a local image from XAML

  - by Flack

  Hello, I have the below simple xaml: <Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <Grid> <Image Source="happyface.jpg"/> </Grid> </Window> happyface.jpg is included in the project and its Build Action is set to "Content" and Copy To Ouptput Directory is set to "Copy Always". When looking at the app through the VS designer, everything is ok and I see the image. However, when I run the app, no image is displayed. I see the image is copied to the out out directory. If I put in the entire path as the source (C:\SANDBOX\WpfApplication1\WpfApplication1\bin\Debug") it works. Any ideas as to why the image is not displayed when I run the app? I read about pack URIs but thought that to just simply reference a loose image in the current directory, I can just use the image name. Thank you.

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• Whats so bad about binding your View to Property of a Model and NOT ViewModel ??

  - by msfanboy

  Hello, I often hear a Model must be wrapped by a ViewModel that the View is not coupled to the Model/not aware of it. With MVC it is common to bind the View to the Model... nobody complains so what ? I am frightened of creating all that wrappers and doing nearly only duplicating property stuff.

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• What types of objects should the ViewModel reference in the MVVM pattern?

  - by Blanthor

  I've seen quite a few examples of MVVM. I can see that the View should reference the ViewModel. I've seen recently an example of a ViewModel referencing a View, which seems wrong to me, as it would result in tighter coupling. Given that ViewModel is often described as an intermediary between the View and the Model, is there more to the ViewModel than a facade to domain objects? I hope I used the term "facade" correctly here.

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• TargetInvocationException?

  - by Mark

  Why would these lines of code cause that exception private Dispatcher dispatcher = null; public DownloadManager(Dispatcher dispatcher = null) { this.dispatcher = dispatcher ?? Dispatcher.CurrentDispatcher; } When the DownloadManager is instantiated in the XAML like <Window.DataContext> <c:DownloadManager /> </Window.DataContext> ?

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• How do I implement a DataGrid with an MVVM approach.

  - by Fred

  Hi, I'd like to implement a sort of Addressbook/Contactbook using a Datagrid (or a List) and the MVVM pattern. Something like in Outlook/Thunderbird, where you've a list of your contacts displayed with a 2-3 main fields (name surname for example), and when you double-click a contact, then you get a new modal box that displays all the details of this specific contact. Since a couple of weeks/months, I'm reading a lot of stuff about MVVM pattern on the net, but somehow, I get confused. Until now, I could find any sample like this. (perhaps, I searched wrong?) How could I organize such an application? Thx in advance for your help.

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• Bind ListBox to List<Image>

  - by Pyush

  I need to bind a List of Images to a list box. My code being: <ListBox x:Name="lstImages"> <ListBox.ItemTemplate> <DataTemplate DataType="{x:Type Image}"> <StackPanel> <Image Source="{Binding Path=UnassignedImages}"></Image> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> Code behind: lstImages.ItemsSource = this.audit.UnassignedImages; Where UnassignedImages being List I tried using both lstImages.ItemsSource & lstImages.DataContent, but none works. Thanks.

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• How to design a Tab which shows content Vertically

  - by Kishore Kumar

  I have to design a tab control. which will show content verically.

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• Set ListBoxItem.IsSelected when child TextBox is Focused

  - by jpsstavares

  Hi, I have a typical MVVM scenario: I have a ListBox that is binded to a List of StepsViewModels. I define a DataTemplate so that StepViewModels are rendered as StepViews. The StepView UserControl have a set of labels and TextBoxs. What I want to do is to select the ListBoxItem that is wrapping the StepView when a textBox is focused. I've tried to create a style for my TextBoxs with the following trigger: <Trigger Property="IsFocused" Value="true"> <Setter TargetName="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ListBoxItem}}}" Property="IsSelected" Value="True"/> </Trigger> But I get an error telling me that TextBoxs don't have an IsSelected property. I now that but the Target is a ListBoxItem. How can I make it work?

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• Labelsize appears bigger in VB.Net

  - by Ikke

  I'm trying to stack a few lists on top of each other. But the label.size.height appears to be bigger then the label itself. When i set the borderstyle to fixedsingle, i see the border around the text. But the height is bigger, so there comes a space between one label and the next. I have tried to set margin and padding to 0 without result. Exemple: label.size.height return 23, when the height actually is something around 15. Does someone knows how i get the right size? Edit: When i explicitly set the height of the lable, the problem is solved. Is this some problem with autosize?

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• Rotating Cursor According to Rotated TextBox

  - by j-t-s

  Hi All I have a TextBox that I allow my users to rotate. But what I would LOVE for my users is to have their Cursor rotate to the same angle that the TextBox was rotated at. For example, if they rotated the TextBox to 28°, then when the Cursor enters that TextBox the Cursor should also rotate itself to 28°. Any help at all will be greatly appreciated. Thank you :)

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• EventAggregator, is it thread-safe?

  - by pfaz

  Is this thread-safe? The EventAggregator in Prism is a very simple class with only one method. I was surprised when I noticed that there was no lock around the null check and creation of a new type to add to the private _events collection. If two threads called GetEvent simultaneously for the same type (before it exists in _events) it looks like this would result in two entries in the collection. /// <summary> /// Gets the single instance of the event managed by this EventAggregator. Multiple calls to this method with the same <typeparamref name="TEventType"/> returns the same event instance. /// </summary> /// <typeparam name="TEventType">The type of event to get. This must inherit from <see cref="EventBase"/>.</typeparam> /// <returns>A singleton instance of an event object of type <typeparamref name="TEventType"/>.</returns> public TEventType GetEvent<TEventType>() where TEventType : EventBase { TEventType eventInstance = _events.FirstOrDefault(evt => evt.GetType() == typeof(TEventType)) as TEventType; if (eventInstance == null) { eventInstance = Activator.CreateInstance<TEventType>(); _events.Add(eventInstance); } return eventInstance; }

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• Reading xmldata through parser

  - by Jitendra Jadav

  Hello Everyone I am Reading Data as a xmlElemet through parser I am getting error Like..'\b', hexadecimal value 0x08, is an invalid character I Read this string.. Thanks..

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• Accessing properties through Generic type parameter

  - by Veer

  I'm trying to create a generic repository for my models. Currently i've 3 different models which have no relationship between them. (Contacts, Notes, Reminders). class Repository<T> where T:class { public IQueryable<T> SearchExact(string keyword) { //Is there a way i can make the below line generic //return db.ContactModels.Where(i => i.Name == keyword) //I also tried db.GetTable<T>().Where(i => i.Name == keyword) //But the variable i doesn't have the Name property since it would know it only in the runtime //db also has a method ITable GetTable(Type modelType) but don't think if that would help me } } In MainViewModel, I call the Search method like this: Repository<ContactModel> _contactRepository = new Repository<ContactModel>(); public void Search(string keyword) { var filteredList = _contactRepository.SearchExact(keyword).ToList(); } I use Linq-To-Sql.

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• When NOT to use MVVM?

  - by Vitalij

  I have started using MVVM pattern recently. I have had several projects where I used it and with every new one, I start to see that it will fit great within that new project. And now I start to ask myself are there situation when it's better NOT to use MVVM. Or is it such a nice pattern which you can use anywhere? Could you please describe several scenarios where MVVM wouldn't be the best choice?

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• Show NSSegmentedControl menu when segment clicked, despite having set action

  - by enchilada

  My question is based on another question. Instead of repeating a bunch of stuff, I hope it's okay that I refer you to that other question instead: http://stackoverflow.com/questions/1203698/show-nssegmentedcontrol-menu-when-segment-clicked-despite-having-set-action/ My question is: How would the code within [self showGearMenu] look like, i.e. how would one actually use the popUpContextMenu:withEvent:forView method to accomplish what the poster of the other question wants? I ask because it seems that the question was resolved for the poster, but he never shared with us how he actually popped up the menu :)

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• How do I show and position an Image initialized in the codebehind on my page?

  - by Andreas Strandfelt

  Hello. I have created a simple method to check if an image has been approved and finally returns it as an control. But how do i call and show it on the page? I've tried something like this in the aspx-file: <% SendImage("DKBygMiniLogo.gif", "True"); %> Here is the simple method: protected Image SendImage(object Image, object Approved) { bool approved = Convert.ToBoolean(Approved); Image img = new Image(); if (approved) { img.ImageUrl = "~/images/Ads/" + Image.ToString(); img.Visible = true; } else { img.ImageUrl = "~/images/Ads/" + Image.ToString(); img.Visible = false; } return img; } How do I actually show the image?

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• Activate window/application

  - by LnDCobra

  I have implemented a Splash Screen according to WiredPrairie unmanaged c++ splasher class. But not when my application loads, my window isn't activated. The user has to click on the login box even thought it is the only window open in my application. I have tried the following but none of these work. Topmost = true; Focus(); Activate(); Is there any way to give my login window focus when the application starts? Sometimes the window behind it has focus! (Visual Studio if run on my machine), Explorer or a different application window on other peoples machines. Anyone have any idea?

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