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Articles indexed Thursday May 27 2010

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  • WPF Databinding With A Collection Object

    - by Randster
    Argh, although I've been googling, I really would appreciate it if someone could break my problem down as all the code examples online are confusing me more than assisting (perhaps it's just late)... I have a simple class as defined below: public class Person { int _id; string _name; public Person() { } public int ID { get { return _id; } set { _id = value; } } public string Name { get { return _name; } set { _name = value; } } } that is stored in a database, and thru a bit more code I put it into an ObservableCollection object to attempt to databind in WPF later on: public class People : ObservableCollection<Person> { public People() : base() { } public void Add(List<Person> pListOfPeople) { foreach (Person p in pListOfPeople) this.Add(p); } } In XAML, I have myself a ListView that I would like to populate a ListViewItem (consisting of a textblock) for each item in the "People" object as it gets updated from the database. I would also like that textblock to bind to the "Name" property of the Person object. I thought at first that I could do this: lstPeople.DataContext = objPeople; where lstPeople is my ListView control in my XAML, but that of course does nothing. I've found TONS of examples online where people through XAML create an object and then bind to it through their XAML; but not one where we bind to an instantiated object and re-draw accordingly. Could someone please give me a few pointers on: A) How to bind a ListView control to my instantiated "People" collection object? B) How might I apply a template to my ListView to format it for the objects in the collection? Even links to a decent example (not one operating on an object declared in XAML please) would be appreciated. Thanks for your time.

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  • concatenation of all combination from different Lists in c#

    - by shan
    i have a List and i m grouping it into different lists. like:-List("a","b","c","it","as","am","cat","can","bat") 3 list List1:-a,b,c List2:-it,as,am List3:-cat,can,bat how can i concat the all possible combination from this lists. output like: a,it,cat b,it,cat c,it,cat a,am,cat b,am,cat c,am,cat . . . . etc so on...

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  • APC decreasing php performance??? (php 5.3, apache 2.2, windows vista 64bit)

    - by M.M.
    Hi, I have an Apache/2.2.15 (VC9) and PHP/5.3.2 (VC9 thread safe) running as an apache module on Vista 64bit machine. All running fine. Project that I'm benchmarking (with apache's ab utility) is basically standard Zend Framework project with no db connection involved. Average (median) apache response is about 0.15 seconds. After I've installed APC (3.1.4-dev VC9 thread safe) with standard settings suddenly the request response time raised to 1.3 seconds (!), which is unacceptable... All apc settings looked always good (through the apc.php script: enough shm memory, no cache full, fragmentation 0%). Only difference was to disable the stats lookup (apc.stat = 0). Then the response dropped to 0.09 seconds which was finally better than without the apc. IIRC, it's expected and obvious that the stat lookup creates some overhead, but shouldn't it still be far more performant compared to running wihout the apc extension at all? Or put it differently why is the apc.stat creating so much overhead? Apparently, something is not working as it should, I don't really know where to start looking. Thank you for your time/answers/direction in advance. Cheers, m.

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  • Can C# Attributes access the Target Class?

    - by Heka
    I want to access the properties of a class from the attribute class by using reflection. Is it possible? For example: class MyAttribute : Attribute { private void AccessTargetClass() { // Do some operations } } [MyAttribute] class TargetClass { }

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  • Accessing a Clip Inside Another Clip in a Loaded SWF-File

    - by Anders
    I'm writing a card game in AS3. The artist I'm working with has produced (in Flash CS4) a single swf-file containing all the card graphics and animations. The structure of the fla working file looks something like this: - Scene - CardGraphics (Movie Clip) - CardFront - CardBack - CardValueImage (Movie Clip) ... In the program I create 52 instances of my Card class, each having a MovieClip instance created from the loaded swf. The idea is to set the frame of the CardValueImage MovieClip to correspond to the Card instance's suit and rank member variables. However, I can't figure out how I access CardValueImage and call gotoAndStop (or whatever method I will need to call). This is basically what I want to do: // Card Class [Embed(source = 'CardGraphics.swf')] private static var CardsClip:Class; private var clip:MovieClip = new CardsClip; // Card Constructor this.valueImageFrame = suit * 13 + rank; // Calculate which frame contains the // graphical representation of this card this.clip.CardValueImage.gotoAndStop(valueImageFrame);

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  • How to empty a socket in python?

    - by luc
    I need to empty the data on a socket (making sure that there is nothing to receive). Unfortunately, there is no function for this in the python socket module. I've implemented something this way: def empty_socket(sock): """remove the data present on the socket""" input = [sock] while 1: inputready, o, e = select.select(input,[],[], 0.0) if len(inputready)==0: break for s in inputready: s.recv(1) What do you think? Is there a better way to do that? Update: I don't want to change the socket timeout. What's why i prefer a select to a read. Update: The original question was using the 'flush' term. It seems that 'empty' is a better term. Update - 2010-02-27 : I've noticed a bug after when the pair has closed. The inputready is always filled with the sockets. I fixed that by adding a maximum number of loops. Is there a better fix?

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  • Qt script get text property

    - by user350668
    Hi all, I'm trying to access the text of a QLabel using Qt script. Here is what I have: var mystring; var mylabel = objectFromPath("...someWindow::Label"); mystring = mylabel.text; // then do something with mystring This doesn't work and I don't know what I'm doing wrong. Any help would be appreciated. thanks

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  • java generated excel sorting color mess.

    - by afzal
    I am using jxl api for generating a excel sheet, in which the alternate rows are highlighted, when I sort the contents of a excel and sort manually, the cell background colors messup, usually this is because I am writing the color cell by cell, is there anyway through which i color the alternate rows of the excel while generating it, in such a way that it doesnt effect the sorting of the contents.

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  • How do I access Windows Event Viewer log data from Java

    - by MatthieuF
    Is there any way to access the Windows Event Log from a java class. Has anyone written any APIs for this, and would there be any way to access the data from a remote machine? The scenario is: I run a process on a remote machine, from a controlling Java process. This remote process logs stuff to the Event Log, which I want to be able to see in the controlling process. Thanks in advance.

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  • How to get started with testing(jMock)

    - by London
    Hello, I'm trying to learn how to write tests. I'm also learning Java, I was told I should learn/use/practice jMock, I've found some articles online that help to certain extend like : http://www.theserverside.com/news/1365050/Using-JMock-in-Test-Driven-Development http://jeantessier.com/SoftwareEngineering/Mocking.html#jMock And most articles I found was about test driven development, write tests first then write code to make the test pass. I'm not looking for that at the moment, I'm trying to write tests for already existing code with jMock. The official documentation is vague to say the least and just too hard for me. Does anybody have better way to learn this. Good books/links/tutorials would help me a lot. thank you EDIT - more concrete question : http://jeantessier.com/SoftwareEngineering/Mocking.html#jMock - from this article Tried this to mock this simple class : import java.util.Map; public class Cache { private Map<Integer, String> underlyingStorage; public Cache(Map<Integer, String> underlyingStorage) { this.underlyingStorage = underlyingStorage; } public String get(int key) { return underlyingStorage.get(key); } public void add(int key, String value) { underlyingStorage.put(key, value); } public void remove(int key) { underlyingStorage.remove(key); } public int size() { return underlyingStorage.size(); } public void clear() { underlyingStorage.clear(); } } Here is how I tried to create a test/mock : public class CacheTest extends TestCase { private Mockery context; private Map mockMap; private Cache cache; @Override @Before public void setUp() { context = new Mockery() { { setImposteriser(ClassImposteriser.INSTANCE); } }; mockMap = context.mock(Map.class); cache = new Cache(mockMap); } public void testCache() { context.checking(new Expectations() {{ atLeast(1).of(mockMap).size(); will(returnValue(int.class)); }}); } } It passes the test and basically does nothing, what I wanted is to create a map and check its size, and you know work some variations try to get a grip on this. Understand better trough examples, what else could I test here or any other exercises would help me a lot. tnx

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  • Multiple IP stacks

    - by Aditya Sehgal
    I have a linux box with two ethernet interfaces (eth0 & eth1) with two corresponding IPs. As per my understanding, currently they are served by 1 IP stack. Is it possible to install another IP stack with IP Stack 1 handling ethernet interface eth0 and the other IP stack handling eth1.

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  • Firebird database corruption causes

    - by Rytis
    I am running several different Firebird versions (2.0, 2.1) on multiple entry level Windows-based servers with wildly varying hardware. The only matching thing between them is that they are running same home built application with the same database structure. Lately I've been seeing massive slowdowns on multiple servers. Turns out that database gets corrupted, so each time it breaks, I get to mend, backup and restore the database, and it all is fine for some time (1-2 weeks), and then it repeats once again. Thankfully, I haven't seen any data loss or damage... yet. The thing is that every such downtime results in lost productivity, and often quite some driving for me as some of the databases are in remote locations. I've been trying to find out what's causing the corruption, but I haven't been able to. The fact that it's running on different hardware hints that it should not be a hardware based problem. If we rule out hardware issues, I have a bad feeling that it's a bug in Firebird as I'm not doing anything fancy via SQL. Do you have any idea how to find out exactly what's causing the corruption and hopefully fix the problem?

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  • Can I build a laptop from scratch?

    - by Ciaran
    I've been looking at this as the same approach as building a desktop computer from scratch but I've never really come across the core things. Can I buy a laptop "case"? Can I buy a motherboard/PSU to fit that case? Can I choose a CPU fan? What are my battery options? Obviously taking into consideration the case. Why isn't this as easy as putting together a desktop computer? Shouldn't there be standards such as ATX? If they exist, what are they?

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  • Howto unzip ".xz" file with 7z and lzma

    - by neversaint
    I tried to uncompressed a "*.xz" file with both 7z and lzma. But they gave me such message: $ 7z x myfile.fq.xz 7-Zip 4.57 Copyright (c) 1999-2007 Igor Pavlov 2007-12-06 p7zip Version 4.57 (locale=C,Utf16=off,HugeFiles=on,4 CPUs) Processing archive: myfile.fq.xz Error: Can not open file as archive $ 7z x myfile.fq.xz 7-Zip 4.57 Copyright (c) 1999-2007 Igor Pavlov 2007-12-06 p7zip Version 4.57 (locale=C,Utf16=off,HugeFiles=on,4 CPUs) Processing archive: myfile.fq.xz Error: Can not open file as archive and with lzma $ lzma -d myfile.fq.xz J_12.fq.xz: unknown suffix -- unchanged with other option: $ lzma -S .xz -d myfile.fq.xz lzma: SetDecoderProperties() error

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  • By using ejb 3 , jsf and jboss is it possible to call a ejb method from web module?

    - by Bariscan
    Even if I have different modules in my jee application including myproject-web and myproject-ejb; is it possible to call (or inject) my ejb session bean which is in the ejb module from a managed bean which is in the web module? When I asked before, I see the following declaration: @EJB private BeanInterface yourbean However, I wanna learn that whether it is possible or not, to call each other between different contexts (one of it in ejb context, the other one -managed bean- is in web context)? Any help would be appreciated Best wishes Bariscan

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  • JavaFX - question regarding binding button's disabled state

    - by jamiebarrow
    I'm trying to create a dummy application that maintains a list of tasks. For now, all I'm trying to do is add to the list. I enter a task name in a text box, click on the add task button, and expect the list to be updated with the new item and the task name input to be cleared. I only want to be able to add tasks if the task name is not empty. The below code is my implementation, but I have a question regarding the binding. I'm binding the textbox's text variable to a string in my view model, and the button's disable variable to a boolean in my view model. I have a trigger to update the disabled state when the task name changes. When the binding of the task name happens the boolean is updated accordingly, but the button still appears disabled. But then when I mouse over the button, it becomes enabled. I believe this is due to JavaFX 1.3's binding being lazy - only updates the bound variable when it is read. Also, when I've added the task, I clear the task name in the model, but the textbox's text doesn't change - even though I'm using bind with inverse. Is there a way to make the textbox's text and the button's disabled state update automatically via the binding as I was expecting? Thanks, James AddTaskViewModel.fx: package jamiebarrow; import java.lang.System; public class AddTaskViewModel { function logChange(prop:String,oldValue,newValue):Void { println("{System.currentTimeMillis()} : {prop} [{oldValue}] to [{newValue}] "); } public var newTaskName: String on replace old { logChange("newTaskName",old,newTaskName); isAddTaskDisabled = (newTaskName == null or newTaskName.trim().length() == 0); }; public var isAddTaskDisabled: Boolean on replace old { logChange("isAddTaskDisabled",old,isAddTaskDisabled); }; public var taskItems = [] on replace old { logChange("taskItems",old,taskItems); }; public function addTask() { insert newTaskName into taskItems; newTaskName = ""; } } Main.fx: package jamiebarrow; import javafx.scene.control.Button; import javafx.scene.control.TextBox; import javafx.scene.control.ListView; import javafx.scene.Scene; import javafx.scene.layout.VBox; import javafx.stage.Stage; import javafx.scene.layout.HBox; def viewModel = AddTaskViewModel{}; var txtName: TextBox = TextBox { text: bind viewModel.newTaskName with inverse onKeyTyped: onKeyTyped }; function onKeyTyped(event): Void { txtName.commit(); // ensures model is updated cmdAddTask.disable = viewModel.isAddTaskDisabled;// the binding only occurs lazily, so this is needed } var cmdAddTask = Button { text: "Add" disable: bind viewModel.isAddTaskDisabled with inverse action: onAddTask }; function onAddTask(): Void { viewModel.addTask(); } var lstTasks = ListView { items: bind viewModel.taskItems with inverse }; Stage { scene: Scene { content: [ VBox { content: [ HBox { content: [ txtName, cmdAddTask ] }, lstTasks ] } ] } }

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  • Get client ip with python

    - by Elad
    Hi, I'm a newbie in python. I want to write a simple web that prints the client ip on screen my http.conf Handler: AddHandler mod_python .py PythonHandler mod_python.publisher PythonDebug On The cgi.escape(os.environ["REMOTE_ADDR"]) return this error: KeyError: 'REMOTE_ADDR' and I just get lost with the BaseHTTPRequestHandler so what is the simple way to get the client ip? thank you.

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  • Cannot install Fast debugger in Netbeans 6.8 for Ruby 1.9

    - by Bragaadeesh
    Hi, I am using Netbeans 6.8 version and Ruby 1.9.1 installed on Windows XP. I tried to install the fast debugger and I am getting the following error. Building native extensions. This could take a while... ERROR: Error installing ruby-debug-ide: ERROR: Failed to build gem native extension. D:/Ruby19/bin/ruby.exe mkrf_conf.rb Building native extensions. This could take a while... Gem files will remain installed in D:/Ruby19/lib/ruby/gems/1.9.1/gems/ruby-debug-ide-0.4.9 for inspection. Results logged to D:/Ruby19/lib/ruby/gems/1.9.1/gems/ruby-debug-ide-0.4.9/ext/gem_make.out Have someone else faced this problem before. Please help. Thanks.

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  • WPF Prism deactivate ?

    - by 2Fast4YouBR
    Hi all, I have an problem and would like to know if it is common problem or jsut with me. I am using Wpf with Prism and Unity, all with the pattern MvvM. I am loading a viewModel that has a reference to a dropdown with few items, my idea is that each time that the user click in some place to open the view that has this dropdown is that the dropdown will be shown with diferent values. The problem is that I see is that after I show the view for the first time and after the first DEACTIVATE, when I try to load it again looks like it is already in the memory (was not deactivated/disposed), so as is already in memory, it not call the constructor again of the modelView and the dropdown is shown with tha same old values. public BranchSelectionViewModel(IUnityContainer unityContainer) { this.unityContainer = unityContainer; User user = this.unityContainer.Resolve<User>(); this.branches = new ObservableCollection<Department>(user.Departments .Where(department => department.DepartmentId != user.SelectedDepartment.DepartmentId)); }

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  • Ipad - Display thumbnail from video

    - by ludo
    Hi, I have a video store in my bundle, how can I display a thumbnail of it with the new Media Player Framework from the Ipad (thumbnail + the white play button on it), I can also store my video online it will be better. Someone have an idea? best Regards,

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