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• EF and design pattern

  - by kathy

  Hello, I’m working on a high volume transactional enterprise application(asp.net, windows app, oracle app as client) which has been designed using n-tire application and SOA architecture .The application was developed in the .NET platform utilizing C#,VB.NET, Framework 3.5 (I’m planning to upgrade to the , Framework 4.0), EF( EF in the data layer level) and WCF(WCF services in the service layer level) Since this is the first project using EF, and having read about using EF in n-tier and SOA applications, and the features available in the EF Feature, I have the following points: Which design pattern should I use in EF( Simple Entities, Change Set, Self-Tracking Entities and DTOs) in the data layer level In addition Which design pattern should I use in the other tier and layer to get the best practices of EF Thanks

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• Message pump in .NET Windows service

  - by Pickles

  I have a Windows Service written in C# that handles all of our external hardware I/O for a kiosk application. One of our new devices is a USB device that comes with an API in a native DLL. I have a proper P/Invoke wrapper class created. However, this API must be initialized with an HWnd to a windows application because it uses the message pump to raise asynchronous events. Besides putting in a request to the hardware manufacturer to provide us with an API that does not depend on a Windows message pump, is there any way to manually instantiate a message pump in a new thread in my Windows Service that I can pass into this API? Do I actually have to create a full Application class, or is there a lower level .NET class that encapsulates a message pump?

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• Detecting a Key Press Squashed by Another Application

  - by Eric Smith

  I have a WPF application I'm planning to use as an overlay for a DirectX game (specifically Bad Company 2). I'm using WM_KEYBOARD_LL hook to detect KeyDown events so I can bring my app to the foreground when a specific button is pressed. This works perfectly except for when the game is running (I've also noticed this problem with Window's "Chess Titans" so it may be a DirectX thing). As far as I can work out, when the game detects a keyboard press, it "eats" the event and doesn't pass the CallNextHookEx() method like it should, which would allow the key press message to be moved along to the next application in the queue. I'm wondering if there's any sort of work-around to this? It seems kind of unfair that a single application can just willy-nilly eat up messages like that. Thanks! :) Relevant MSDN documentation: http://msdn.microsoft.com/en-us/library/ms644985%28VS.85%29.aspx

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• How to monitor screen updates?

  - by user299600

  I am trying to write a program that monitors when the screen has been redrawn. Meaning if any part of any window is redrawn, then the program is notified. As far as I understand I should use a journal record hook like at http://www.vbaccelerator.com/home/vb/code/libraries/Hooks/Journal_Record_Hooks/article.asp However, I do not understand which MSG type would get me the WM_PAINT events (WH_CALLWNDPROC and WH_CALLWNDPROCRET do not seem to do the job). I'm not even sure that WM_PAINT is what I'm looking for... Basically, if I knew when the DC associated with GetDesktopWindow() has changed then my problem would be solved. Question is: How do you monitor screen updates?

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• Managing Unique IDs in stateless (web) DB4O applications

  - by Phil.Wheeler

  I'm playing around with building a new web application using DB4O - piles of fun and some really interesting stuff learned. The one thing I'm struggling with is DB4O's current lack of support for stateless applications (i.e. web apps, mostly) and the need for automatically-generated IDs. There are a number of creative and interesting approaches that I've been able to find that hook into DB4O's events, use GUIDs rather than numeric IDs or for whatever reason avoid using any system of ID at all. While each approach has its merits, I'm wondering if the less-elegant approach might equally be the best fit. Consider the following pseudo-code: If ID == 0 or null Set ID = (typeof(myObject)).Count myObject.Save It seems like such a blindingly simple approach, it's usually about here that I start thinking, "I've missed something really obvious". Have I?

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• sproutcore - todos tutorial, addbutton not responding in firefox

  - by kristian nissen

  I'm testing the sproutcore todo's tutorial and I have checked the code in step-5 and it's identical to my code at least as far as I can see, but the addButton is not responding to click events. addTask: function () { var task; task = Sinatra.store.createRecord(Sinatra.Task, { 'description': 'New Task', 'isDone': false, 'priority': 1 }); this.selectObject(task); this.invokeLater(function () { var contentIndex = this.indexOf(task); var list = Sinatra.mainPage.getPath('mainPane.middleView.contentView') var listItem = list.itemViewForContentIndex(contentIndex); listItem.beginEditing(); }); return YES; and in the main: addButton: SC.ButtonView.design({ layout: { centerY: 0, height: 24, right: 12, width: 100 }, title: 'Add Task', target: 'Sinatra.tasksController', action: 'addTask' }), I can't see the problem, please help. (I have only tested this in firefox on kubuntu)

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• ASP.net and WCF some clarification on "overriding"

  - by nettguy

  Recently I faced few interview questions.The interviewer asked the to give the detailed answer. 1)Can we override a WCF service (Its is not OOPS overriding) ?.Explain the reason on either end. (WCF Related). 2)Can we override Page events (Page_Load())?.Explain reason.(ASP.NET related). 3)What is the primary responsibility of Pre_Init( page) event ,apart from user preference setting,skinning? 4) Can we override Static methods.Explain the reason. can anyone help me to understand the reasons?

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• JComponent undock effect

  - by Christo Du Preez

  I'm trying to accomplish an undock effect for a custom Swing JComponent. By default the component is used inside a form along with other components. I want to be able to maximize this component to use the whole screen and then be able to dock it again. So far I've tested public void showDialog() { JFrame mainFrame = App.getApplication().getMainFrame(); JDialog dialog = new JDialog(mainFrame); dialog.setModal(true); dialog.setSize(800, 600); //Set to 80x660 for now dialog.add(this); //This is my JComponent dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE); dialog.setVisible(true); } This gives me desired effect but when closing the dialog my component doesn't receive events no more. How can I prevent this? Or is there perhaps a better way to accomplish this?

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• How to stop a WPF binding from ignoring the PropertyChanged event that it caused?

  - by Jacob Stanley

  I have a TextBox bound to a ViewModel's Text property with the following setup: Xaml <TextBox Text="{Binding Text}"/> C# public class ViewModel : INotifyPropertyChanged { public string Text { get { return m_Text; } set { if (String.Equals(m_Text, value)) { return; } m_Text = value.ToLower(); RaisePropertyChanged("Text"); } } // Snip } When I type some stuff in to the TextBox it successfully sets the Text property on the ViewModel. The problem is that WPF ignores the property changed event that is raised by it's own update. This results in the user not seeing the text they typed converted to lowercase. How can I change this behaviour so that the TextBox updates with lowercase text? Note: this is just an example I have used to illustrate the problem of WPF ignoring events. I'm not really interested in converting strings to lowercase or any issues with String.Equals(string, string).

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• Update DataBase on clicking in button, after editing gridview (not automatically saving in DB, but a

  - by gaponte69

  0 vote down star I am using GridView in asp .net and editing data with edit command field property (as we know after updating the edited row, we automatically update the database), and I want to use transactions (with begin to commit statement - including rollback) to commit this update query in database, after clicking in some button (after some events for example), not automatically to insert or update the edited data from grid directly to the DB...so I want to save them somewhere temporary (even many edited rows - not just one row) and then to confirm the transaction - to update the real tables in database... Any suggestions are welcomed... I've used some good links, but very helpful, like: http://www.asp.net/learn/data-access/tutorial-63-cs.aspx http://www.asp.net/learn/data-access/tutorial-66-cs.aspx etc... etc...

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• jQuery drag drop slower for more DIV items

  Hi there, I have got a hierarchichal tags (with parent child relationship) in my page and it will account to 500 - 4500 (can even grow). When i bound the draggable and droppable for all i saw very bad performance in IE7 and IE6. The custom helper wont move smoothly and was very very slow. Based on some other post i have made the droppable been bound/unbound on mouseover and mouseout events (dynamically). Its better now. But still i dont see the custom helper move very smoothly there is a gap between the mouse cursor and the helper when they move and gets very bad when i access the site from remote. Please help me to address this performance issue. Am totally stuck here.. :(

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• Problems with CGPoint in touches event

  - by Jason

  I'm having some problems with storing variables from my touch events. The warning I get when I run this is that coord and icoord are unused, but I used them in the viewDidLoad implementation, is there a reason why this does not work? Any suggestions? -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; CGPoint icoord = [touch locationInView:touch.view]; } -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; CGPoint coord = [touch locationInView:touch.view]; } - (void)viewDidLoad { if (coord.x > icoord.x) { player.center = CGPointMake(player.center.x + 5, player.center.y); } } Thanks.

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• Javascript resizing with window.open and WebBrowser control

  - by Raj

  I'm using WPF WebBrowser control and handling NewWindow3 events using following code: IServiceProvider serviceProvider = (IServiceProvider)webBrowser.Document; Guid serviceGuid = SID_SWebBrowserApp; Guid iid = typeof(SHDocVw.WebBrowser).GUID; SHDocVw.WebBrowser wb = (SHDocVw.WebBrowser)serviceProvider.QueryService(ref serviceGuid, ref iid); wb.NewWindow3 += new SHDocVw.DWebBrowserEvents2_NewWindow3EventHandler(wb_NewWindow3); How to handle javascript resizing when navigating using window.open, something like this: window.open('Sample.htm',null,'height=200,width=400,status=yes,toolbar=no,menubar=no,location=no'); Is there anyway to get height and width requested by caller in NewWindow3 event handler?

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• Ms Access Save record in subform

  - by LanguaFlash

  I have a main form with a tab control containing multiple subforms. I need to be sure that the data in a subform is saved when the user switches tabs. The problem is that DoCmd.RunCommand acCmdSaveRecord seems only applies to the current form so it doesn't save the data in the subform. I have tried different events on the subform such as deactivate, OnLostFocus etc but they don't fire until another field somewhere else gets the focus. The ideal solution would seem to be to put something on the OnChange event of the tab control to be sure that all the data is saved. That is my question, how to do I save the record in a subform?

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• How does the momentum/inertial scroll work with the Magic Mouse on NSScrollView?

  - by jbrennan

  When you scroll with the newer Apple Magic Mouse (at least on 10.6, I can't confirm any previous Mac OS) you get inertial scroll like scrolling on iPhone (that is, after a flick of the finger to scroll, it doesn't abruptly stop, but instead gradually slows down). This behaviour is "for free" with all NSScrollViews, it would appear. There are exceptional cases, such as Tweetie for Mac (I've heard Tweetie was written with a custom Table View class that works akin to how UITableView works on iPhone). My question is, how do the scroll views know how to do this inertial scrolling? My guess is the mouse [driver] repeatedly sends scroll events with a dampening scroll magnitude (or something like that) over the scroll period. But I'm not really sure how it works. I am having some scrolling problems in my scrollview class and I'm trying to figure out why (obviously we don't have the source code to Tweetie to see why it doesn't get the proper scrolling), but just trying to better understand how it works in order to fix my own problems.

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• JPA query for getting the whole tree

  - by Javi

  Hello, I have a class which models all categories and they can be ordered hierarchically. @Entity @Table(name="categories") public class Category { @Id @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="sequence") @SequenceGenerator(name="sequence", sequenceName="categories_pk_seq", allocationSize=1) @Column(name="id") private Long id; @Column private String name; @OneToOne @JoinColumn(name="idfather") private Category father; } I need to get all categories ordered hierarchically (I mean every father followed by its children and fathers ordered alphabetically on each level) as they could be made for example with PRIOR in oracle. Is it possible to do this with a JPA Query (not a SQL one)? Thanks.

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• How to interpret trackpad pinch gestures to zoom IKImageBrowserView

  - by Fraser Speirs

  I have an IKImageBrowserView that I want to be able to pinch-zoom using a multi-touch trackpad on a recent Mac laptop. The Cocoa Event Handling Guide, in the section Handling Gesture Events says: The magnification accessor method returns a floating-point (CGFloat) value representing a factor of magnification ..and goes on to show code that adjusts the size of the view by multiplying height and width by magnification + 1.0. This doesn't seem to be the right approach for zooming IKImageBrowserView, whose zoomValue property is clamped between 0.0 and 1.0. So, does anyone know how to interpret the event in -[NSResponder magnifyWithEvent:] to zoom IKImageBrowserView?

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• Microcontroller to Microcontroller SPI communication

  - by onaclov2000

  Hello again, I was doing some reading and have even gotten a "master" SPI working on my microcontroller. Here is my question, basically if the master wants to initialize a write to the slave we write to the SSPBUF, how do we control what the slave responds with? The datasheet doesn't seem really clear to me the order of events in that case. I.E. Master puts a char into the SSPBUF, this initiates the SPI module to send data to the slave, during the shift, the slave returns a byte. In the slave side, is there something that tells you you have incoming data, and you can write to your SSPBUF first, THEN accept the data? OR Do you have to write to the SSPBUF the first "return value" you want sent back before the master can have an opportunity to initiate a transfer?

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• Changing a table-valued function that a stored procedure calls is not recognized?

  - by Peter

  Hey all I have a stored procedure sp that calls a table-valued function tvf. Sometimes I modify the tvf but when subsequently executing sp, the output from sp is the same as before the modification. It seems like it is cached or compiled or something. If I make some dummy change to the sp, then I get the right output of the sp. Is there some way, I can overcome this problem? In Oracle it is possible to re-compile all stored procedures, but I haven't been able to figure out how to do this in SQL Server? Any help is highly appreciated.

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• Mandatory profile on Terminal server fails to load. Userenv.log debug

  - by Datapimp23

  Hi, We're having a lot of corrupted profiles lately on our profile share. At the moment I have no clue why, but I decided to switch to one mandatory profile since the users can all use the same and there is no need to have seperate profiles for each user. Here's what I did. I logged into the Terminal server with a new user and configured some stuff (imported certificates and a few files). Then I logged out. Later as admin I copied the profile to another server and renamed it to bsilo. I made sure the user hive settings were adjusted. Everyone had access to the hive. I shared the bsilo folder with full access for everyone. I set the NTFS permissions to read, read & execute, list folder contents for domain users. I also renamed NTUSER.DAT to NTUSER.MAN. Now I set a env variable %manprofile% on the Terminal server that points to \server\bsilo\ntuser.man I set the env var as terminal services profile path for a test user. When I log in I as the user get the following output The system cannot find the path specified. Can somebody point me in the right direction. Thanks USERENV(1774.d18) 15:52:39:724 InitializePolicyProcessing: Initialised Machine Mutex/Events USERENV(1774.d18) 15:52:39:724 InitializePolicyProcessing: Initialised User Mutex/Events USERENV(1774.d18) 15:52:39:724 LibMain: Process Name: \??\C:\WINDOWS\system32\winlogon.exe USERENV(1774.d18) 15:52:48:005 LoadUserProfile: Yes, we can impersonate the user. Running as self USERENV(1774.d18) 15:52:48:005 ========================================================= USERENV(1774.d18) 15:52:48:005 LoadUserProfile: Entering, hToken = <0x340, lpProfileInfo = 0x6e5d8 USERENV(1774.d18) 15:52:48:005 LoadUserProfile: lpProfileInfo-dwFlags = <0x0 USERENV(1774.d18) 15:52:48:005 LoadUserProfile: lpProfileInfo-lpUserName = USERENV(1774.d18) 15:52:48:005 LoadUserProfile: lpProfileInfo-lpProfilePath = <\server\bsilo\ntuser.man USERENV(1774.d18) 15:52:48:005 LoadUserProfile: lpProfileInfo-lpDefaultPath = <\BDPINF5\netlogon\Default User USERENV(1774.d18) 15:52:48:005 LoadUserProfile: NULL server name USERENV(1774.d18) 15:52:48:005 LoadUserProfile: no thread token found, impersonating self. USERENV(1774.d18) 15:52:48:005 GetInterface: Returning rpc binding handle USERENV(218.2f94) 15:52:48:005 IProfileSecurityCallBack: client authenticated. USERENV(218.2f94) 15:52:48:005 DropClientContext: Got client token 000009B4, sid = S-1-5-18 USERENV(218.2f94) 15:52:48:005 MIDL_user_allocate enter USERENV(218.2f94) 15:52:48:005 DropClientContext: load profile object successfully made USERENV(218.2f94) 15:52:48:005 DropClientContext: Returning 0 USERENV(1774.d18) 15:52:48:005 LoadUserProfile: Calling DropClientToken (as self) succeeded USERENV(1774.d18) 15:52:48:005 CProfileDialog::Initialize : Cookie generated USERENV(1774.d18) 15:52:48:005 CProfileDialog::Initialize : Endpoint generated USERENV(218.1f38) 15:52:48:005 IProfileSecurityCallBack: client authenticated. USERENV(218.1f38) 15:52:48:020 LoadUserProfileI: RPC end point IProfileDialog_9D36D6DD48F0578A2A41B23D7A982E63 USERENV(218.1f38) 15:52:48:020 In LoadUserProfileP USERENV(218.1f38) 15:52:48:020 LoadUserProfile: Running as client, sid = S-1-5-18 USERENV(218.1f38) 15:52:48:020 ========================================================= USERENV(218.1f38) 15:52:48:020 LoadUserProfile: Entering, hToken = <0x98c, lpProfileInfo = 0x9c940 USERENV(218.1f38) 15:52:48:020 LoadUserProfile: lpProfileInfo-dwFlags = <0x0 USERENV(218.1f38) 15:52:48:020 LoadUserProfile: lpProfileInfo-lpUserName = USERENV(218.1f38) 15:52:48:020 LoadUserProfile: lpProfileInfo-lpProfilePath = <\server\bsilo\ntuser.man USERENV(218.1f38) 15:52:48:020 LoadUserProfile: lpProfileInfo-lpDefaultPath = <\BDPINF5\netlogon\Default User USERENV(218.1f38) 15:52:48:020 LoadUserProfile: NULL server name USERENV(218.1f38) 15:52:48:020 LoadUserProfile: User sid: S-1-5-21-807756564-1922302612-1565739477-22627 USERENV(218.1f38) 15:52:48:020 CSyncManager::EnterLock USERENV(218.1f38) 15:52:48:020 CSyncManager::EnterLock: No existing entry found USERENV(218.1f38) 15:52:48:020 CSyncManager::EnterLock: New entry created USERENV(218.1f38) 15:52:48:020 CHashTable::HashAdd: S-1-5-21-807756564-1922302612-1565739477-22627 added in bucket 11 USERENV(218.1f38) 15:52:48:020 LoadUserProfile: Wait succeeded. In critical section. USERENV(218.1f38) 15:52:48:864 GetOldSidString: Failed to open profile profile guid key with error 2 USERENV(218.1f38) 15:52:48:864 GetProfileSid: No Guid - Sid Mapping available USERENV(218.1f38) 15:52:48:864 TestIfUserProfileLoaded: return with error 2. USERENV(218.1f38) 15:52:48:864 GetOldSidString: Failed to open profile profile guid key with error 2 USERENV(218.1f38) 15:52:48:864 GetProfileSid: No Guid - Sid Mapping available USERENV(218.1f38) 15:52:48:864 LoadUserProfile: Expanded profile path is \server\bsilo\ntuser.man USERENV(218.1f38) 15:52:48:880 ParseProfilePath: Entering, lpProfilePath = <\server\bsilo\ntuser.man USERENV(218.1f38) 15:52:48:880 CheckXForestLogon: checking x-forest logon, user handle = 2444 USERENV(218.1f38) 15:52:48:880 CheckXForestLogon: policy set to disable XForest check USERENV(218.1f38) 15:52:48:880 ParseProfilePath: Mandatory profile (.man extension) USERENV(218.1f38) 15:52:49:239 AbleToBypassCSC: Try to bypass CSC USERENV(218.1f38) 15:52:49:239 AbleToBypassCSC: tried NPAddConnection3ForCSCAgent. Error 2109 USERENV(218.1f38) 15:52:49:239 AbleToBypassCSC: Share \server\bsilo mapped to drive E. Returned Path E:\ntuser.man USERENV(218.1f38) 15:52:49:239 ParseProfilePath: CSC bypassed. Profile path E:\ntuser.man USERENV(218.1f38) 15:52:49:255 ParseProfilePath: Tick Count = 0 USERENV(218.1f38) 15:52:49:255 ParseProfilePath: GetFileAttributes found something with attributes <0x2022 USERENV(218.1f38) 15:52:49:255 ParseProfilePath: Found a file USERENV(218.1f38) 15:52:49:255 ReportError: Impersonating user. USERENV(218.1f38) 15:52:49:255 ReportError: Logging Error DETAIL - The system cannot find the path specified. USERENV(218.1f38) 15:52:49:255 GetInterface: Returning rpc binding handle USERENV(218.1f38) 15:52:49:255 ReportError: RPC End point IProfileDialog_9D36D6DD48F0578A2A41B23D7A982E63 USERENV(218.1f38) 15:52:49:255 ReportError: waiting on rpc async event USERENV(1774.2398) 15:52:49:255 ErrorDialogEx: Calling DialogBoxParam USERENV(1774.2398) 15:52:49:270 ErrorDlgProc:: DialogBoxParam USERENV(218.1f38) 15:52:52:177 RpcAsyncCompleteCall finished, status = 0 USERENV(218.1f38) 15:52:52:177 ReleaseInterface: Releasing rpc binding handle USERENV(218.1f38) 15:52:52:177 LoadUserProfile: ParseProfilePath returned FALSE USERENV(218.1f38) 15:52:52:177 CancelCSCBypassedConnection: Cancelling connection of E: USERENV(218.1f38) 15:52:52:177 CancelCSCBypassedConnection: Connection deleted. USERENV(218.1f38) 15:52:52:177 CSyncManager::LeaveLock USERENV(218.1f38) 15:52:52:192 CSyncManager::LeaveLock: Lock released USERENV(218.1f38) 15:52:52:192 CHashTable::HashDelete: S-1-5-21-807756564-1922302612-1565739477-22627 deleted USERENV(218.1f38) 15:52:52:192 CSyncManager::LeaveLock: Lock deleted USERENV(218.1f38) 15:52:52:192 LoadUserProfile: 003 About Reverted back to user <00000000 USERENV(218.1f38) 15:52:52:192 LoadUserProfile: Leaving with a value of 0. USERENV(218.1f38) 15:52:52:192 ========================================================= USERENV(218.1f38) 15:52:52:192 LoadUserProfileI: LoadUserProfileP failed with 3 USERENV(218.1f38) 15:52:52:192 LoadUserProfileI: returning 3 USERENV(1774.d18) 15:52:52:192 LoadUserProfile: Running as self USERENV(1774.d18) 15:52:52:192 LoadUserProfile: Calling LoadUserProfileI failed. err = 3 USERENV(218.200c) 15:52:52:192 IProfileSecurityCallBack: client authenticated. USERENV(218.200c) 15:52:52:192 ReleaseClientContext: Releasing context USERENV(218.200c) 15:52:52:192 ReleaseClientContext_s: Releasing context USERENV(218.200c) 15:52:52:192 MIDL_user_free enter USERENV(1774.d18) 15:52:52:192 ReleaseInterface: Releasing rpc binding handle USERENV(1774.d18) 15:52:52:192 LoadUserProfile: Returning FALSE. Error = 3

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• DataGridView lags for a second with large data updates

  - by alexD

  I have a DataGridView with about 400 rows and 10 columns. When the user first displays this table, it receives all of the data from the server and populates the table. The DGV uses a DataTable as it's data source, and when updating the DataTable I use row.BeginEdit/EndEdit and acceptChanges, but when the View itself is updated it lags for a second while all of the DGV is being updated. I am wondering if there is a way to make this smooth, so that for example, if the user is scrolling through the data and it updates, it won't interrupt the scrolling. Or if the user is moving the display around the screen and it updates, it won't interrupt. Is there an easy way to do this? If not, is there away to prevent the DGV from updating the view until all events have ended so it won't be repainted until the user stops scrolling, dragging, etc ?

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• How to establish a two-way communication between Activity and Service in different process?

  - by steff

  Hi everyone, I'm working on establishing a two-way communication between an Activity and a Service which runs in a different process. Querying the process from the Activity is no big deal. But I want the process to notify the Activity on events. The idea behind it is this: the service runs independently from the actual app. It queries a webserver periodically. If a new task is found on the webserver the process should notify the activity. I found this thread over at AndDev.org but it doesn't seem to work for me. I've been messing around with BroadcastReceiver. I've implemented an interface which should notify the Activity but the problem is that the listener is always null since the Broadcast from the process is done via Intent, hence the class that extends BroadcastReceiver will be newly instantiated. How can I establish a 2-way communication? This has to be possible. Thanks for any help, steff

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• Strategy for unsubscribing event handlers

  - by stiank81

  In my WPF application I have a View that is given a ViewModel, and when given this View it adds event handlers to the ViewModel's PropertyChanged event. When some action occur in the GUI I remove the View and add another View to the holding container - where this new one is bound to the same ViewModel. After this has happened the old View still keeps handling PropertyChanged events in the ViewModel. I'm assuming this happens because the View hasn't been collected by the Garbage Collector yet, and therefore is alive? Well - I need it to stop. My assumption is that I need to manually detach the event handler from the ViewModel? Is there a best-practice on how to handle this?

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• How do you draw a line from one corner of the stage to the other?

  - by George Edison

  I am completely perplexed. I asked this question and it (any mentioned solution) doesn't seem to be working at all. All I want is to draw a line from one corner to the other. Here again is the link to the SWF file I have (it's embedded in an HTML document): test.html Here is the source: package { import flash.display.Sprite; import flash.events.Event; public class Main extends Sprite { public function Main():void { if (stage) init(); else addEventListener(Event.ADDED_TO_STAGE, init); } private function init(e:Event = null):void { removeEventListener(Event.ADDED_TO_STAGE, init); // entry point graphics.clear(); graphics.lineStyle(10, 0x000000); graphics.moveTo(0, 0); graphics.lineTo(stage.stageWidth, stage.stageHeight); } } } It just doesn't work! The line goes from somewhere offscreen to about the middle of the stage. What on earth am I doing wrong?

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• touches event handler for UIImageView

  - by madmik3

  I am just getting stated with iPhone development and can't seem to find the answer I am looking for what I want to do. It seems like I should be able to programmatically create a UIImageView and then set up an event handler for it's touch functions. in c# i would have something that looks like Button b = new Button(); b.Click+= my handler code right now I have this CGRect myImageRect = CGRectMake(0.0f, 0.0f, 141.0f, 151.0f); UIImageView *myImage = [[UIImageView alloc] initWithFrame:myImageRect]; myImage.userInteractionEnabled = YES; [myImage setImage:[UIImage imageNamed:@"myImage.png"]]; myImage.opaque = YES; // explicitly opaque for performance [self.view addSubview:myImage]; [myImage release]; What do I need to do to override the touch events? thanks

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