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  • What's the thought behind Children and Controls properties in WPF?

    - by Mathias Lykkegaard Lorenzen
    I don't know if this should go on Programmers, but I thought it was relevant here. Being a skilled WPF programmer myself, I often wonder what people were thinking when they designed WPF in terms of naming conventions. Why would you sometimes have a property called Children for accessing the children of the control, and then sometimes have an equivalent property, just called Controls instead? What were they thinking here? Another example is the Popup control. Instead of a Content property, it has a Child property. Why would you do that? To me that's just confusing. So I'm wondering if there's a logical reason for it, which would probably also help me understand what the properties are called next time I need to do some speed-programming. If there's no reason behind it, then all I can say is WAT.

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  • MVVM - what is the ideal way for usercontrols to talk to each other

    - by Sandbox
    I have a a user control which contains sevral other user controls. I am using MVVM. Each user control has a corresponding VM. How do these user controls send information to each other. I want to avoid writing any code in the xaml code behind. Particularly I am interested in how the controls (inside the main user control) will talk to each other and how will they talk to the container user control. EDIT: I know that using events-delegates will help me solve this issue. But, I want to avoid writing any code in xaml code-behind.

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  • Presentation on WPF

    - by Geetha
    Hi All, I have just start to learn wpf. Can anybody clear me the following to give a presentation on WPF. What is WPF? Why we need it. Difference b/w Win form and wpf. windowsform vs WPF. Geetha.

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  • Need to replace 3rd party WinForm controls, what's the closet WPF equivalent?

    - by Refracted Paladin
    I am tired of Windows Forms...I just am. I am not trying to start a debate on it I am just bored with it. Unfortunately we have become dependent on 4 controls in DevExpress XtraEditors. I have had nothing but difficulties with them and I want to move on. What I need now is what the closet replacement would be for the 4 controls I am using. Here they are: LookUpEdit - this is a dropdown that filters the dropdown list as you type. MemoExEdit - this is a textbox that 'pops up' a bigger area when it has focus CheckedComboBoxEdit - this is a dropdown of checkboxes. CheckedListBoxControl - this is a nicely columned list box of checkboxes This is a LOB app that has tons of data entry. In reality, the first two are nice but not essential. The second two are essential in that I would either need to replicate the functionality or change the way the users are interacting with that particular data. I am looking for help in replicating these in a WPF environment with existing controls(codeplex etc) or in straight XAML. Any code or direction would be greatly appreciated but mostly I am hoping to avoid any commercial 3rd party WPF and would instead like to focus on building them myself(but I need direction) or using Codeplex

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  • What is the behavior of a WPF 4 ControlStoryboardAction trigger?

    - by jonathan_ou
    Hi all! I have a question that's been bugging me for a while: I have a lengthy IO operation which I invoke asynchronously, and I want my UI to show a blinking text to tell the users that the data is loading. I have an IsLoading boolean property in my ViewModel, and I used a ControlStoryboardAction to kickoff the blinking animation, which is set to repeat forever. For my ControlStoryboardAction trigger, I configured a data trigger to see if IsLoading is true, and start my storyboard if true. My problem is, when my IO operation returns, and I set IsLoading back to false, the animation continues to play. I thought once the trigger condition evaluated to false, it would stop the animation? I then added a second ControlStoryboardAction to stop the animation if IsLoading evaluted to false, but this didn't have any effect. The animation continued to play after IsLoading was false. Can anyone explain to me how trigger works in ControlStoryboardAction? In normal data triggers in WPF, once the condition evaluated to false, the property would be set back to its original state. It seems triggers in WPF actions don't work the same way? Thanks in advance for your help!

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  • Why not systematically attach event in WPF instead of using delegate ?

    - by user310291
    For a button to handle event, we can add a delegate to the click property of the button: this.button1.Click += new System.EventHandler(this.button1_Click); But in WPF contrary to Winform, you can also attach a handler http://msdn.microsoft.com/en-us/magazine/cc785480.aspx So why not do so for the button ? Is performance better in first case maybe ? Update: I mean this Attached Events In order to enable elements to handle events that are declared in a different element, WPF supports something called attached events. Attached events are routed events that support a hookup in XAML on elements other than the type on which the event is declared. For example, if you want the Grid element to listen for a Button.Click event to bubble past, you would simply hook it up like the following: <Grid Button.Click="myButton_Click"> <Button Name="myButton" >Click Me</Button> </Grid> The resulting code in the compile-time-generated partial class now looks like this: #line 5 "..\..\Window1.xaml" ((System.Windows.Controls.Grid)(target)).AddHandler( System.Windows.Controls.Primitives.ButtonBase.ClickEvent, new System.Windows.RoutedEventHandler(this.myButton_Click));

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  • how to implement login and service features as in skype or msn chat in a wpf application

    - by black sensei
    Hello Good people! I'm building an WPF application that connect to web services for its operations.Things that i needed to be working are so far fine.Now i'll like to improve use experience by adding features like username editable combobox, sign me in when skype start and start when computer start. I have a fair idea about each feature but very small knowledge about their implementation. Question 1 username combobox : i use a combobox with isEditable set to true but i think it doesnt have the previous username, would that mean that i have to store every successful login username in a sqlite for example? Question 2 sign me in when skype start : i think about using sqlite after all to store the credentials and store the value (as in true or false) if autologin has to be performed. Question 3 start when computer start : i know it's about having is as service.but the process of using it as a service and removing its service when checkbox is checked or unckecked is a bit confusing to me. Question 4 Please wait(signing in) of skype if i want to do things like please wait at login(login is over webservice) in a WPF application should i use a animated gif in a grid that i can show when hiding the login combobox and passwordbox grid or i should use an animated object(for which i have no knowledge about for now) ? This post in mainly for you experts to either point me to the right resource and tell me what is done as best practice. things like dos and dons.Thanks for reading this and please let me have a clair idea about how to start implementing those features. thanks again

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  • Qt vs WPF/.NET

    - by aaronc
    My company is trying to make the decision between using Qt/C++ for our GUI framework or migrating to .NET and using WPF. We have up to this point been using MFC. It seems that .NET/WPF is technically the most advanced and feature-rich platform. I do, however, have several concerns. These include: Platform support Framework longevity (i.e. future-proofing) Performance and overhead For this application we are willing to sacrifice support for Windows 2000, Macs, and Linux. But, the issue is more related to Microsoft's commitment to the framework and their extant platforms. It seems like Microsoft has a bad habit of coming up with something new, hyping it for a few years, and then relegating it to the waste-bin essentially abandoning the developers who chose it. First it was MFC and VB6, then Windows Forms, and now there's WPF. Also with .NET, versions of Windows were progressively nicked off the support list. Looks like WPF could be here to stay for a while, but since its not open source its really in Microsoft's hands. I'm also concerned about the overhead and performance of WPF since some of our applications involve processing large amounts of information and doing real-time data capture. Qt seems like a really good option, but it doesn't have all the features of WPF/.NET couldn't use languages like C#. Basically, what does the community think about Microsoft's commitment to WPF compared with previous frameworks? Are the performance considerations significant enough to avoid using it for a realtime app? And, how significant are the benefits of WPF/.NET in terms of productivity and features compared to Qt?

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  • How to disable maximize button in a WPF appication page not in a window

    - by Lukman
    I want to disable the maximize button in WPF application page, not in a WPF application window When I searched in Google, it is available methods for disabling the maximize button in WPF window The code snippet is as follows Window.WindowStyle= WindowStyle.None But is not working in WPF page It is showing errors. In WPF page there is WindowStyleProperty instead of WindowStyle and it is showing errors as Error 1:A static readonly field cannot be assigned to (except in a static constructor or a variable initializer) Error 2: Cannot implicitly convert type 'System.Windows.WindowStyle' to 'System.Windows.DependencyProperty' So how can I disable the maximize button in WPF page Then how can I implement it Suggest me any sample code snippet.... Advance thanks.........

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  • WPF win app and browser app

    - by pdiddy
    I'm hearing this alot, that you can develop an app in WPF and run it as a desktop app or in a browser. Is this really true? I've install visual studio 2010 and I see 2 project templates : WPF Windows Application and WPF Browser Application (XBAP). Currently reading a book on WPF, it talks about Page-Base app, which can be use for navigation. To creatre an app to run on your browser you have to use the WPF Browser Application. So if I start with WPF Windows Application template can I run it in a browser ? I am assuming not since most of my class will be Window and not Page ....

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  • What makes MVVM uniquely suited to WPF?

    - by Reed Copsey
    The Model-View-ViewModel is very popular with WPF and Silverlight. I've been using this for my most recent projects, and am a very large fan. I understand that it's a refinement of MVP. However, I am wondering exactly what unique characteristics of WPF (and Silverlight) allow MVVM to work, and prevent (or at least make difficult) this pattern from working using other frameworks or technologies. I know MVVM has a strong dependency on the powerful data binding technology within WPF. This is the one feature which many articles and blogs seem to mention as being the key to WPF providing the means of the strong separation of View from ViewModel. However, data binding exists in many forms in other UI frameworks. There are even projects like Truss that provide WPF-style databinding to POCO in .NET. What features, other than data binding, make WPF and Silverlight uniquely suited to Model-View-ViewModel?

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  • Where to find good 3d articles for wpf?

    - by Ankit Rathod
    Hello, I am beginner in WPF. I am basically a Silverlight guy and as i know it doesn't support the full real 3d model of WPF. I am getting interested in learning 3D in WPF. I googled up for WPF and i get very old links which are 3 years old back when WPF was known as Avalon. They may not be of any use in V4.0. Can anybody refer me some links where i can learn WPF 3D from basics? Thanks in advance :)

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  • WPF dynamic layout: how to enforce square proportions (width equals height)?

    - by Gart
    I'm learning WPF and can't figure out how to enfore my buttons to take a square shape. Here is my XAML Markup: <Window x:Class="Example" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Height="368" Width="333"> <Window.Resources> <Style x:Key="ToggleStyle" BasedOn="{StaticResource {x:Type ToggleButton}}" TargetType="{x:Type RadioButton}"> </Style> </Window.Resources> <RadioButton Style="{StaticResource ToggleStyle}"> Very very long text </RadioButton> </Window> Specifying explicit values for Width and Height attributes seems like a wrong idea - the button should calculate its dimensions based on its contents automagically, but keep its width and height equal. Is this possible?

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  • How to disable border of WPF button when click it?

    - by Ekkapop
    How to disable border of WPF button when I click it? I have create button like below, everything work fine except when I click on the button. <Button Background="Transparent" BorderBrush="Transparent"> <Button.Content> <StackPanel> <Image Source="xxx.png" /> <TextBlock Text="Change Password" /> </StackPanel> </Button.Content> </Button> When I click the button, it has border like below. I try to create style for FocusVisualStyle of the button but it don't work as I expect, this problem also occur when I set IsDefault="True" too.

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  • How can I make a grid of clickable images from a list of data in WPF?

    - by mico
    Hello, I am a seasoned C and Java programmer, but an absolute WPF newbie. I am creating a kiosk application that will display a list of images of products that the user will click to see product details and maybe place an order. I am trying to structure my app with MVVM Foundation because I am used to the benefits of structure and tests. I wonder what is the most natural way to create a grid of clickable images that will fill the screen left to right, top to bottom (or the other way round, I have no exact requirements). Any image should be bound to an object that will become current and be displayed in the next screen. Thanks for your help.

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  • Unable to display data in a WPF datagrid that has a DataView instance as the items source

    - by Jimmy W
    I am using a DataGrid object from the WPF toolkit. I am binding the DataGrid object to the default view of a DataTable instance as declared in the following code: WeatherGrid.ItemsSource = weatherDataTable.DefaultView; weatherDataTable has three columns. The first column is defined to contain a string data type. The other two columns are defined to contain double data types. When the application exits the function that calls the binding as expressed in the declaration, The DataGrid object displays data for the first column, but not the other columns. When I type the following in the immediate window in the debugger: ((DataRowView)WeatherGrid.Items[0]).Row[1] I get a number, but this doesn't correspond with what is being displayed. Why is only the first column visible, and how can I get all of the data to be visible? I'll leave my XAML definition for the DataGrid object below: <toolkit:DataGrid Margin="12.726,77.71,12,0" Name="WeatherGrid" Height="500" Grid.Row="1" VerticalAlignment="Top" CanUserAddRows="False" CanUserDeleteRows="False" IsReadOnly="True" />

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  • C#, WPF. Length of string that will fit in a specific width.

    - by Ian
    Hi, I'm sure I'm missing something obvious, I have an area in which I intend to draw text. I know its (the area) height and width. I wish to know how many characters/Words will fit in the width, characters preferably. Second question, If the line is too long I'll want to draw a second line, so I guess I need to get the height of the text as well, including what ever it considers the right vertical padding? I'd also rather like to know the inverse, i.e. how many characters I can fit in a specific width. I assume the fact that WPF isn't constrained to pixels will have some bearing on the answer? Ultimately I'm planning on wrapping text around irregular shaped images embedded in the text. Any pointers in the right direction would be great. Thanks

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  • How do I render my own DirectX Stuff to a full screen WPF's DirectX surface?

    - by marc40000
    Basically Danny Varod seems to know as he posted it as an answer to this question: Display a Message Box over a Full Screen DirectX application I think, theoretically this might work, but I have no idea how to actually do it. Since I'm also not allowed to post a comment under his comment nor am I allwoed to ask on meta about how to contact another user, I ask this as a normal question here: How do I render my own DirectX Stuff to a full screen WPF's DirectX surface? For starters, I have no idea how to get the DirectX surface from a WPF window. If I had it, what do I have to take care of that the WPF rendering doesn't screw up my own rending or vice-versa?

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  • What the best way to wire up Entity Framework database context (model) to ViewModel in MVVM WPF?

    - by hal9k2
    As in the question above: What the best way to wire up Entity Framework database model (context) to viewModel in MVVM (WPF)? I am learning MVVM pattern in WPF, alot of examples shows how to implement model to viewModel, but models in that examples are just simple classes, I want to use MVVM together with entity framework model (base first approach). Whats the best way to wire model to viewModel. Thanks for answers. //ctor of ViewModel public ViewModel() { db = new PackageShipmentDBEntities(); // Entity Framework generated class ListaZBazy = new ObservableCollection<Pack>(db.Packs.Where(w => w.IsSent == false)); } This is my usual ctor of ViewModel, think there is a better way, I was reading about repository pattern, not sure if I can adapt this to WPF MVVM

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  • How do I get my custom WPF textbox to fill correctly?

    - by Dan Ryan
    I am trying to create a custom WPF textbox control that extends the standard textbox control but the extended textbox behaves differently when placed in control containers. Within my Window I have a stackpanel with a standard textbox and my extended textbox: <StackPanel Margin="10"> <TextBox Height="21" /> <l:SearchTextBox Search="SearchTextBox_Search" Height="21" Margin="0, 10, 0, 0" SearchMode="Delayed" HorizontalAlignment="Left" /> </StackPanel> The standard textbox stretches the length of the StackPanel whereas the custom textbox does not. How can I get the controls to behave the same? The styling for the custom textbox is shown below: <Style x:Key="{x:Type UIControls:SearchTextBox}" BasedOn="{StaticResource {x:Type TextBox}}" TargetType="{x:Type UIControls:SearchTextBox}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type UIControls:SearchTextBox}"> <TextBox /> </ControlTemplate> </Setter.Value> </Setter> </Style>

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  • WPF - Grid - updating Row and Column number attached properties on child controls each time a new Ro

    - by ig105
    I have a WPF Grid with a XAML similar to this: <Grid width=200 Height=200 > <Grid.ColumnDefinitions > <ColumnDefinition Width="1*" /> <ColumnDefinition Width="2*" /> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="Auto" /> <RowDefinition Height="Auto" /> <RowDefinition Height="Auto" MinHeight="24" /> </Grid.RowDefinitions> <TextBlock Text="Name" Grid.Row="0" Grid.Column="0"/> <TextBox Grid.Row="0" Grid.Column="1" /> <TextBlock Text="Age" Grid.Row="1" Grid.Column="0"/> <TextBox Grid.Row="1" Grid.Column="1" /> </Grid> I need to add a new row in between existing 2 rows of data, but my worry is that when I add a new row, I will need to manually update Grid.Row attached property in each of the controls that appear in rows below the newly added row. Is there a smarter way of doing this? may be to set Row/Column numbers relative to adjacent Rows/Columns ? Cheers.

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