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  • Need file read in from form load

    - by Luke
    I am using a listview, and trying to populate using a file. I need the file to be read in as soon as the form starts. private void mainForm_Load(object sender, EventArgs e) { //get file read in if (File.Exists("../../MealDeliveries.txt")) { StreamReader sr = new StreamReader("../../MealDeliveries.txt"); //first line is delivery name string strDeliveryName = sr.ReadLine(); do { //other lines Delivery d = new Delivery(strDeliveryName, sr.ReadLine(), sr.ReadLine(), sr.ReadLine(), sr.ReadLine(), sr.ReadLine(), sr.ReadLine()); mainForm.myDeliveries.Add(d); //check for further values strDeliveryName = sr.ReadLine(); //stop if no more values } while (strDeliveryName != null); displayDeliveries(); } } Should this work?

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  • How to initialize a static const map in c++?

    - by Meloun
    Hi, I need just dictionary or asociative array string = int. There is type map C++ for this case. But I need make one map in my class make for all instances(- static) and this map cannot be changed(- const); I have found this way with boost library std::map<int, char> example = boost::assign::map_list_of(1, 'a') (2, 'b') (3, 'c'); Is there other solution without this lib? I have tried something like this, but there are always some issues with map initialization. class myClass{ private: static map<int,int> create_map() { map<int,int> m; m[1] = 2; m[3] = 4; m[5] = 6; return m; } static map<int,int> myMap = create_map(); } thanks

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  • How to make a thread stay runnig in c#

    - by menachem
    Hello, I have a Windows Form Application (Form1) that allow the user to open another Forms (FormGraph). In order to open the FormGraph App I use a thread that open it. Here is the code that the thread is running: private void ThreadCreateCurvedGraph() { FormGraph myGraph = new FormGraph(); myGraph.CreateCurvedGraph(...); myGraph.Show(); } My problem is that myGraph closed right after it's open. 1) Does anyone know why this is happening and how to make myGraph stay open? 2) After the user closed myGraph, How do I terminate the thread? Many thanks!

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  • Google App Engine - DELETE JPQL Query and Cascading

    - by Taylor Leese
    I noticed that the children of PersistentUser are not deleted when using the JPQL query below. However, the children are deleted if I perform an entityManager.remove(object). Is this expected? Why doesn't the JPQL query below also perform a cascaded delete? @OneToMany(mappedBy = "persistentUser", cascade = CascadeType.ALL) private Collection<PersistentLogin> persistentLogins; ... @Override @Transactional public final void removeUserTokens(final String username) { final Query query = entityManager.createQuery( "DELETE FROM PersistentUser p WHERE username = :username"); query.setParameter("username", username); query.executeUpdate(); }

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  • Hibernate/JPA and PostgreSQL - Primary Key?

    - by Shadowman
    I'm trying to implement some basic entities using Hibernate/JPA. Initially the code was deployed on MySQL and was working fine. Now, I'm porting it over to use PostgreSQL. In MySQL, my entity class defines its primary key as an auto-incrementing long value with the following syntax: @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; However, I've found that I get errors with PostgreSQL when I try and insert numerous records at a time. What do I need to annotate my primary key with to get the same auto-incrementing behavior in PostgreSQL as I have with MySQL? Thanks for any help you can provide!

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  • Silverlight file upload - file is in use by another process (Excel, Word)

    - by walkor
    Hi, all. I have a problem with uploading of the file in Silverlight application. Here is a code sample. In case when this file is opened in other application (excel or word for example) it fails to open it, otherwise it's working fine. I'm using OpenFileDialog to choose the file and pass it to this function. private byte[] GetFileContent(FileInfo file) { var result = new byte[] {}; try { using (var fs = file.OpenRead()) { result = new byte[file.Length]; fs.Read(result, 0, (int)file.Length); } } catch (Exception e) { // File is in use } return result; } Is there any way i can access this file or should i just notify the user that the file is locked?

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  • What's the VB.NET equivalent of this C# code for wiring up and declaring an event?

    - by Ben McCormack
    I'm working on a tutorial to build a media player in Silverlight and am trying to wire up an EventHandler to the timer.Tick event of a DispatchTimer object so that the time of the video is synced with a Slider object. The sample code is in C# and I can't for the life of me figure out the proper syntax in VB.NET with RaiseEvent and/or Handles to wire up the event. Below is the relevant C# code. I'll include comments on where I'm getting stuck. private DispatchTimer timer; public Page() { //... timer = new DispatchTimer(); timer.Interval = TimeSpan.FromMilliseconds(50); timer.Tick += new EventHandler(timer_Tick); // <== I get stuck here b/c // I can't do "timer.Tick += ..." in VB.NET } void timer_Tick(object sender, EventArgs e) { if (VideoElement.NaturalDuration.TimeSpan.TotalSeconds > 0) { sliderScrubber.Value = VideoElement.Position.TotalSeconds / VideoElement.NaturalDuration.TimeSpan.TotalSeconds; } }

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  • C++ Passing `this` into method by reference

    - by David
    I have a class constructor that expects a reference to another class object to be passed in as an argument. I understand that references are preferable to pointers when no pointer arithmetic will be performed or when a null value will not exist. This is the header declaration of the constructor: class MixerLine { private: MIXERLINE _mixerLine; public: MixerLine(const MixerDevice& const parentMixer, DWORD destinationIndex); ~MixerLine(); } This is the code that calls the constructor (MixerDevice.cpp): void MixerDevice::enumerateLines() { DWORD numLines = getDestinationCount(); for(DWORD i=0;i<numLines;i++) { MixerLine mixerLine( this, i ); // other code here removed } } Compilation of MixerDevice.cpp fails with this error: Error 3 error C2664: 'MixerLine::MixerLine(const MixerDevice &,DWORD)' : cannot convert parameter 1 from 'MixerDevice *const ' to 'const MixerDevice &' But I thought pointer values could be assigned to pointers, e.g. Foo* foo = new Foo(); Foo& bar = foo;

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  • Static DB Provider in ASP.NET MVC Causing Memory Leak

    - by user364685
    Hi, I have got an app I'm going to write in ASP.NET MVC and I want to create a DatabaseFactory object something like this:- public class DatabaseFactory { private string dbConn get { return <gets from config file>; } public IDatabaseTableObject GetDatabaseTable() { IDatabaseTableObject databaseTableObject = new SQLDatabaseObject(dbConn); return databaseTableObject; } } and this works fine, but I obviously have to instantiate the DatabaseFactory in every controller that needs it. If I made this static, so I could, in theory just call DatabaseFactory.GetDatabaseTable() it would cause a memory leak, wouldn't it?

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  • Mapping an Array to a Single Row

    - by João Bragança
    I have the following classes: public class InventoryItem { private Usage[] usages = new Usage[12]; virtual public Usage[] Usages { get { return usages; }} virtual public string Name{get;set;} } public class Usage { virtual public double Quantity{get;set;} virtual public string SomethingElse{get;set;} } I know that Usages.Length will always be 12. I think it would be best to store it in the DB like so: Name nvarchar(64), Usage_Quantity_0 float, Usage_SomethingElse_0 nvarchar(16), Usage_Quantity_1 float, Usage_SomethingElse_1 nvarchar(16), ... Usage_Quantity_11 float, Usage_SomethingElse_11 nvarchar(16), How can I get this done?

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  • C# WinForms: How to load an image, then wait a few seconds, then play a mp3 sound ?

    - by ibmkahm
    Hello everybody, (after pressing a button) i would like to show an image (using a picturebox), wait a few seconds and then play a mp3 sound, but i dont get it to work. To wait a few seconds i use "System.Threading.Thread.Sleep(5000)". The problem is, the image alway appears AFTER the wait time, but i want it to show first, then wait, then play the mp3... i tried to use "WaitOnLoad = true" but it doesnt work, shouldn't it load the image first and the continue to read the next code line ?? Here is the code i've tried, that doesnt work: private void button1_Click(object sender, EventArgs e) { pictureBox1.WaitOnLoad = true; pictureBox1.Load("image.jpg"); System.Threading.Thread.Sleep(5000); MessageBox.Show("test"); //just to test, here should be the code to play the mp3 } (i also tried loading the image with "LoadAsync" and put the code to wait and play the mp3 in the "LoadCompleted" event, but that doesnt work either...) would be very nice if somebody helps me

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  • How can I teach a know-it-all beginner programmer?

    - by Liran Orevi
    I need to teach a teenage beginner programmer (private tutoring style). The problem is that despite their poor knowledge and skills, they are sure of their abilities, to the point where I find it hard to teach them "better ways". What's the best way to tackle this? Just to be clear what I'm talking about: Constantly changing between tools/IDEs/libraries when it's tough. Blind certainty that really bad designs are really very good. Copying and pasting from the Internet, without understanding the code, and "marking" it as a project.

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  • Can AutoMapper call a method on destination for each member of collection on source?

    - by YonahW
    I have two classes as below. public class Destination { public Destination() { _StringCollection = new List<String>(); } private ICollection<String> _StringCollection; public IEnumerable<String> StringCollection { get { return _StringCollection.AsEnumerable<String>(); } } public void AddString(string str) { _StringCollection.Add(str); } } public class Source { public List<String> StringCollection { get; set; } } I would like to map that for each member of source call AddString(member) on Destination. I thought that maybe I could do something with a custom resolver but can't seem to figure out how.

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  • Network Security and Encryption explained in laymen terms

    - by Ehrann Mehdan
    Although I might pretend very well that I known a thing about networks or security and it might help me pass an interview, or fix a bug, I don't really feel I'm fooling anyone. I'm looking for a laymen terms explanation of nowadays network security concepts and solutions. The information is scattered around and I didn't find a resource for "dummies" like me (e.g experienced Java developers that can speak the jargon but have no real clue what it means) Topics I have a weak notion about and want to understand better as a Java developer PGP Public / Private keys RSA / DES SSL and 2 way SSL (keystore / trustore) Protecting against Man in the middle fraud Digital Signature and Certificates Is there a resource out there that really explains it in a way that doesn't require a Cisco certificate / Linux lingo / know what is subnet masking or other plumbing skills?

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  • Setting up a Git remote with a truncated history

    - by drg
    I am in the midst of doing some non-standard, probably doomed, experiments on a git repository. The goal is to create a remote repository with a truncated history which can still share commits with an internal repository which has a full history. I've had some success using a graft to connect the public history with the private history - when I push from my internal repository, only the post-graft contents are included. So my main question is: what is the simplest way of taking a commit, eliminating its parent and writing a graft in place of the parent? A more general question: is what I'm trying to do going to cause me pain in the long run, do you know if there's a better way?

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  • Windows Phone and Silverlight ListBox.ItemTemplate

    - by user551308
    Hi, I have a Windows Phone 7 application with the following listbox and every item contains 2 textblocks and a HyperlinkButton. <ListBox.ItemTemplate> In the ViewModel constructor I have the following code: GetCommand = new RelayCommand(() ={some code}); where GetCommand is a property : public RelayCommand GetCommand { get; private set; } My problem is that GetCommand = new RelayCommand(() ={some code}); is not executing when I press the button. I must say that if dont place the HyperlinkButton insise the itemTemplate, everything works fine. I use the Galasoft mvvm light tookit - http://www.galasoft.ch/mvvm/getstarted/ I appreciate any help.

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  • Selectedindex in listview, throwing up an error!

    - by Luke
    Hey guys, the following code shows what i am trying to do. private void btnEdit_Click(object sender, EventArgs e) { iDeliverySelected = lstDeliveryDetails.SelectedIndex; bool addEdit = false; } The selectedindex is throwing up the following error.. 'System.Windows.Forms.ListView' does not contain a definition for 'SelectedIndex' and no extension method 'SelectedIndex' accepting a first argument of type 'System.Windows.Forms.ListView' could be found (are you missing a using directive or an assembly reference?) Any ideas why? First time I have tried to use SelectedIndex, not sure if i am using it correctly?

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  • When should I consider representing the primary-key ...?

    - by JMSA
    When should I consider representing the primary-key as classes? Should we only represent primary keys as classes when a table uses composite-key? For example: public class PrimaryKey { ... ... ...} Then private PrimaryKey _parentID; public PrimaryKey ParentID { get { return _parentID; } set { _parentID = value; } } And public void Delete(PrimaryKey id) {...} When should I consider storing data as comma-separated values in a column in a DB table rather than storing them in different columns?

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  • Subscript out of range error

    - by Edmond
    Private Sub sendemail(esubj) ROW_BEGIN = 1 ROW_END = 72 Sheets("Input").Select Range("A" & ROW_BEGIN & ":S" & ROW_END).Select Range("A" & ROW_BEGIN).Select fileL = "\\fire\school\FINANCE\Report\FY10\Key Indicator\" fileL = fileL & (Left(Range("I7"), 3)) & Right(Year(Date), 2) fileL = fileL & "\Key Report - " & myfdate & ".xls" I have a workbook with a spreadsheet tab named Input. When I try to run it, I get the Subscript out of range message. Why cant it pull from the Input spreadsheet??

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  • How to configure XMPP to allow all logged in user to see each other and chat with each other?

    - by Nachiket
    Hello guys, I am new to XMPP. I am using Openfire server, and created a console client using Smack library. My usecase: All users anonymous, logged in (In future, website visitors) will be able to see other anonymous, logged-in users. And they can initiate a private chat (one-to-one) with any of them. So, I am able to logged in as Anonymous user, but I am not able to see other Anon / Logged in users (using Roster), because they are not in anon user's roster. So, What should be configuration OR custom=component/code to to achieve this usecase? Do I need to create server component? Any hint? OR It can be done using proper configuration? Cheers

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  • How to distinguish properties from constants if they both use PascalCasing for naming?

    - by Gishu
    As stated in the framework design guidelines and the WWW in general, the current guideline is to name your constants like this LastTemplateIndex as opposed to LAST_TEMPLATE_INDEX With the PascalCasing approach, how do you differentiate between a Property and a Constant. ErrorCodes.ServerDown is fine. But what about private constants within your class ? I use quite a lot of them for naming magic numbers.. or for expected values in my unit tests and so on. The ALL_CAPS style helps me know that it is a constant . _testApp.SelectTemplate(LAST_TEMPLATE_INDEX); *Disclosure: I have been using the SCREAMING_CAPS style for a while for constants + I find it more readable than squishedTogetherPascalCasedName. It actually STANDS_OUT in a block of text*

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  • after_create :create a new line in DB

    - by Karl Entwistle
    Hey guys I was wondering if anyone could help me with an issue im having, basically id like to have Account.create after a PayPal notification is received, There is a simple cart model which corresponds to line_items within the cart so add_account_to_market would look like this in pseudo code def add_account_to_market if status == "Completed" find the line items(via cart_id) that correspond to the cart.id that just been paid create an account with user_id set to the current carts user id end end Ive never tried to do something like this in Rails and its not working, Ive been pulling my hair out all night trying to fix this, hopefully someone can help or point me in the right direction. Thanks :) class PaymentNotification < ActiveRecord::Base belongs_to :cart serialize :params after_create :mark_cart_as_purchased after_create :add_account_to_market private def mark_cart_as_purchased if status == "Completed" cart.update_attribute(:purchased_at, Time.now) cart.update_attribute(:paid, true) end end def add_account_to_market if status == "Completed" l = LineItem.find(:all, :conditions => "cart_id = '#{cart.id}'") for l.quantity Account.new(:user_id => cart.user_id) end end end end PS mark_cart_as_purchased method is working fine, its just the add_account_to_market im having issues with.

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  • Issues with the [embed] tag and fonts

    - by Legogo
    Hi, I have some issue with the [embed] tag. Even if I set the embedFonts property of the textfield to true the text doesn't show up. The thing is that it worked previously and after some changes (not related to fonts) it doesn't. I'd like to understand how the embed process for font works to find the error in my code. I declare : [Embed(source = 'asset/font.ttf', fontName="font", mimeType="application/x-font-truetype")] private static var font:String; to assign the font to the program. Then i call "font" when declaring my textFormat. Is the "fontName" property the link with the textformat ? I work with flashdevelop and the flex_sdk_4.0.0.14159 (the big adobe one, with air (~140mo)) Thx ! -Leg

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  • Hibernate criteria with projection not performing query for @OneToMany mapping

    - by Josh
    I have a domain object, Expense, that has a field called initialFields. It's annotated as so: @OneToMany(fetch = FetchType.EAGER, cascade = { CascadeType.ALL }, orphanRemoval = true) @JoinTable(blah blah) private final List<Field> initialFields; Now I'm trying to use Projections in order to only pull certain fields for performance reasons, but when doing so the initialFields field is always null. It's the only OneToMany field and the only field I am trying to retrieve with the projection that is behaving this way. If I use a regular HQL query initialFields is populated appropriately, but of course I can't limit the fields. Anyone ever seen anything like this?

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  • Save VM properties with EF code first

    - by Julien
    I thought this would be simple but can't find any good examples. public Class BookVm : ImplementsPropertyChanged { public int BookId {get;set;} private bool _favorite; public bool Favorite { get { return _favorite; } set { _favorite = value; OnPropertyChanged("Favorite"); MyDbContext.SaveChanges() // this does not work } } Then in my XAML bound to Book <CheckBox Content="Favorite" IsChecked="{Binding Favorite}" /> How and when do I call SaveChanges() on my DatabaseContext? I don't want to implement a save button. If I intercept the PropertyChange event and call SaveChanges, nothing seems to happen. My object is modified in memory but the database does not see a change. My BookVm class is created on application startup like so: foreach (var book in MyDbContext.Books) Books.Add(book); Where Books is an ObservableCollection<Book> in my MainWindowVm

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