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  • Define interface for loading custom UserControls through reflection

    - by Tim
    I'm loading custom user controls into my form using reflection. I would like all my user controls to have a "Start" and "End" method so they should all be like: public interface IStartEnd { void Start(); void End(); } public class AnotherControl : UserControl, IStartEnd { public void Start() { } public void End() { } } I would like an interface to load through reflection, but the following obviously wont work as an interface cannot inherit a class: public interface IMyUserControls : UserControl, IInit, IDispose { }

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  • Finalizing a COM object

    - by Neverrav
    I'm trying to implement a singleton class, that holds a com object inside it. Class implements IDisposable interface, but when I try to implement a finalization method, I get an exception of access to com object from another thread. This happens because clr uses a different thread when finalizes objects. Is there any way to implement such a thing or maybe I just doing something wrong?

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  • initializing variables in ActiveRecord's classes

    - by Hadi
    How to initialize variables in ActiveRecord class? Variables here is the variables that are outside the scope of database such as: class Product attr_accessor :used end I want to initially assign @used initially to false, later if some person access the product, i will change @used to true First i thought of putting @used=false in initialize method, but it does not get called.

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  • Combobox item style

    - by user373721
    my project is asp.net MVC, using Telerik MVC combobox. I can change the sytle of the first item if I use: var item = combobox.dropDown.$items.first(); item.addClass('test'); Or change all items, using: combobox.dropDown.$items.addClass('test'); But I need to change just specific items (based on a model), I tried: combobox.dropDown.$items[1].addClass('test'); I get this error: Object doesn't support property or method 'addClass'

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  • Where is the PyGTK event stack?

    - by mkotechno
    You can know if the event stack is empty calling the gtk.events_pending() method, but I want to manipulate the pending events and filter it before the next gtk loop cycle, this data must be stored somewhere as an attribute or something, but where? Thanks.

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  • How to get status code of a POST with Asp.Net HttpWebRequest

    - by Hasan Gürsoy
    I'm trying to ping Google when my web site's sitemap is updated but I need to know which status code does Google or any other service returns. My code is below: HttpWebRequest rqst = (HttpWebRequest)WebRequest.Create("http://search.yahooapis.com/ping?sitemap=http%3a%2f%2fhasangursoy.com.tr%2fsitemap.xml"); rqst.Method = "POST"; rqst.ContentType = "text/xml"; rqst.ContentLength = 0; rqst.Timeout = 3000; rqst.GetResponse();

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  • iphone cocos2d sprites disappearing

    - by jer
    I've been working on a game and implementing the physics stuff with chipmunk. All was going fine on the cocos2d part until the integration with chipmunk. A bit of background: The game is a game with blocks. Levels are defined in a property list, where positions, size of the blocks, gravitational forces, etc., are all defined for each block to be shown in the level. The problem is with the blocks showing up. I have a method on my BlockLayer class which is part of my game's main scene. Upon creation of the layer, the property list is read, and all the blocks are created. The following method is called to create the blocks: - (void)createBlock:(Block*)block withAssets:(NSBundle*)assets { Sprite* sprite; switch(block.blockColour) { case kBlockColourGreen: sprite = [Sprite spriteWithFile:[assets pathForResource:@"green" ofType:@"png" inDirectory:@"Blocks"]]; break; case kBlockColourOrange: sprite = [Sprite spriteWithFile:[assets pathForResource:@"orange" ofType:@"png" inDirectory:@"Blocks"]]; break; case kBlockColourRed: sprite = [Sprite spriteWithFile:[assets pathForResource:@"red" ofType:@"png" inDirectory:@"Blocks"]]; break; case kBlockColourBlue: sprite = [Sprite spriteWithFile:[assets pathForResource:@"blue" ofType:@"png" inDirectory:@"Blocks"]]; break; } sprite.position = block.bounds.origin; [self addChild:sprite]; if(block.blockColour == kBlockColourGreen || block.blockColour == kBlockColourRed) space-gravity = cpvmult(cpv(0, 10), 1000); cpVect verts[] = { cpv(-block.bounds.size.width, -block.bounds.size.height), cpv(-block.bounds.size.width, block.bounds.size.height), cpv(block.bounds.size.width, block.bounds.size.height), cpv(block.bounds.size.width, -block.bounds.size.height) }; cpBody* blockBody = cpBodyNew([block.mass floatValue], INFINITY); blockBody-p = cpv(block.bounds.origin.x, block.bounds.origin.y); blockBody-v = cpvzero; cpSpaceAddBody(space, blockBody); cpShape* blockShape = cpPolyShapeNew(blockBody, 4, verts, cpvzero); blockShape-e = 0.9f; blockShape-u = 0.9f; blockShape-data = sprite; cpSpaceAddShape(space, blockShape); } With the above code, the sprites never show up. However, if I comment out the "cpSpaceAddBody(space, blockBody);" line, the sprites show up. The position and size of the blocks are stored in the "bounds" property of instances of the Block class, which is a CGRect. Not sure if it's important, but the orientation of the app is in landscape left, and all the coordinates are based on that orientation. Any help would be greatly appreciated.

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  • how to pass data when using MenuItem.ItemContainerStyle

    - by black sensei
    Hello Experts! i've been trying to have a dynamic ContextMenu to show the name property of each of the object in its collection of objects. here is concrete example ,i'm connecting to a webservice to pull contacts and groups of a particular account.so i have those as global variables.i display the contacts in a listbox and i want to show on right click of a contact in the listbox the list of groups that it can be added to. to be able to add a contact to a group i need the id of the contact(which i have) and the id of the group which i'm looking for here is my code. xmlns:serviceAdmin="clr-namespace:MyWpfApp.serviceAdmin" ...... <ListBox.ContextMenu> <ContextMenu> <MenuItem Header="Refresh" Click="RefreshContact_Click"></MenuItem> <MenuItem Header="Add New Contact" Click="ContactNew_Click"></MenuItem> <MenuItem Header="Add to Group" Name="groupMenus"> //<!--<MenuItem.Resources> // <DataTemplate DataType="{x:Type serviceAdmin:groupInfo}" x:Key="groupMenuKey" > // <MenuItem> // <TextBlock Text="{Binding name}" /> // </MenuItem> // </DataTemplate> // </MenuItem.Resources>--> <MenuItem.ItemContainerStyle> <Style> <Setter Property="MenuItem.Header" Value="{Binding name}"/> <Setter Property="MenuItem.Tag" Value="{Binding id}" /> </Style> </MenuItem.ItemContainerStyle> </MenuItem> <MenuItem Header="Delete Selected" Click="ContactDelete_Click"></MenuItem> </ContextMenu> </ListBox.ContextMenu> ...... and on xaml.cs //this code is in the method that loads the groups loadedgroup = service.getGroups(session.key, null); groupListBox.ItemsSource = loadedgroup; groupMenus.ItemsSource = loadedgroup.ToList(); this code is showing the name of the groups alright but i need the id of the group clicked on. If you've noticed i commented a portion of the xaml code. with that i could bind(with ease) the id to the tag.But it won't work and the MenuItem.ItemContainerStyle is the one working but then i'm lost: Question 1 : how do i create a handler method for a click event of a submenu that has the names of the groups? Question 2 : how do i get the clicked group id to work with? thanks for reading and kindly help me in this

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  • String to datetime

    - by SARAVAN
    I have a string 12012009 input by the user in ASP.NET MVC application. I wanted to convert this to a DateTime. But if I do DateTime.TryParse("12012009", out outDateTime); it returns a false. So I tried to convert 12012009 to 12/01/2009 and then do DateTime.TryParse("12/01/2009", out outDateTime); which will work But I don't find any straight forward method to convert string 12012009 to string "12/01/2009". Any ideas?

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  • Anonymous class implementing interface

    - by Flo
    I have the following code inside a method: var list = new[] { new { Name = "Red", IsSelected = true }, new { Name = "Green", IsSelected = false }, new { Name = "Blue", IsSelected = false }, }; I would like to call a function that requires a list of elements with each element implementing an interface (ISelectable). I know how this is done with normal classes, but in this case I am only trying to fill in some demo data. Is it possible to create an anonymous class implementing an interface? like this: new { Name = "Red", IsSelected = true } : ISelectable

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  • Can lazy loading be considered an example of RAII?

    - by codemonkey
    I have been catching up on my c++ lately, after a couple years of exclusive Objective-C on iOS, and the topic that comes up most on 'new style' c++ is RAII To make sure I understand RAII concept correctly, would you consider Objective-C lazy loading property accessors a type of RAII? For example, check the following access method - (NSArray *)items { if(_items==nil) { _items=[[NSArray alloc] initWithCapacity:10]; } return _items } Would this be considered an example of RAII? If not, can you please explain where I'm mistaken?

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  • How to embed html table into the body of email

    - by Michael Mao
    Hi all: I am sending info to target email via PHP native mail() method right now. Everything else works fine but the table part troubles me the most. See sample output : Dear Michael Mao : Thank you for purchasing flight tickets with us, here is your receipt : Your tickets will be delivered by mail to the following address : Street Address 1 : sdfsdafsadf sdf Street Address 2 : N/A City : Sydney State : nsw Postcode : 2 Country : Australia Credit Card Number : *************1234 Your purchase details are recorded as : <table><tr><th class="delete">del?</th><th class="from_city">from</th><th class="to_city">to</th><th class="quantity">qty</th><th class="price">unit price</th><th class="price">total price</th></tr><tr class="evenrow" id="Sydney-Lima"><td><input name="isDeleting" type="checkbox"></td><td>Sydney</td><td>Lima</td><td>1</td><td>1030.00</td><td>1030</td></tr><tr class="oddrow" id="Sydney-Perth"><td><input name="isDeleting" type="checkbox"></td><td>Sydney</td><td>Perth</td><td>3</td><td>340.00</td><td>1020</td></tr><tr class="totalprice"><td colspan="5">Grand Total Price</td><td id="grandtotal">2050</td></tr></table> The source of table is directly taken from a webpage, exactly as the same. However, Gmail, Hotmail and most of other emails will ignore to render this as a table. So I am wondering, without using Outlook or other email sending agent software, how could I craft a embedded table for the PHP mail() method to send? Current code snippet corresponds to table generation : $purchaseinfo = $_POST["purchaseinfo"]; //if html tags are not to be filtered in the body of email $stringBuilder .= "<table>" .stripslashes($purchaseinfo) ."</table>"; //must send json response back to caller ajax request if(mail($email, 'Your purchase information on www.hardlyworldtravel.com', $emailbody, $headers)) echo json_encode(array("feedback"=>"successful")); else echo json_encode(array("feedback"=>"error")); Any hints and suggestions are welcomed, thanks a lot in advance.

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  • willSendRequest redirectResponse doesn't work in iPhone SDK2.0

    - by WholeIphone
    I use the delegate method connection:willSendRequest:redirectResponse: in SDK 2.2, the code like below: - (NSURLRequest *)connection:(NSURLConnection *)con willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse { if(redirectResponse) { if(!self.autoRedirect) { NSLog(@"response will redirect"); request = nil; } } return request; if the request is returned to nil ,it seems it hangs up here, and delegate didReceiveData will not get called. but it works in SDK 3. Any suggestions about this?

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  • Make emacs autocomplete Ruby methods

    - by Mad Wombat
    Is there a way to make emacs pull autocompletions of ruby methods the way Eclipse and NetBeans do? That is if I type File. and press CTRL-space in Eclipse I will get a list of File methods. Same with variables. I have installed autocomplete plugin, ruby-mode, rinari and cedet, but so far it will complete local variable and method names, but will not native ones.

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  • Multiprogramming in Django, writing to the Database

    - by Marcus Whybrow
    Introduction I have the following code which checks to see if a similar model exists in the database, and if it does not it creates the new model: class BookProfile(): # ... def save(self, *args, **kwargs): uniqueConstraint = {'book_instance': self.book_instance, 'collection': self.collection} # Test for other objects with identical values profiles = BookProfile.objects.filter(Q(**uniqueConstraint) & ~Q(pk=self.pk)) # If none are found create the object, else fail. if len(profiles) == 0: super(BookProfile, self).save(*args, **kwargs) else: raise ValidationError('A Book Profile for that book instance in that collection already exists') I first build my constraints, then search for a model with those values which I am enforcing must be unique Q(**uniqueConstraint). In addition I ensure that if the save method is updating and not inserting, that we do not find this object when looking for other similar objects ~Q(pk=self.pk). I should mention that I ham implementing soft delete (with a modified objects manager which only shows non-deleted objects) which is why I must check for myself rather then relying on unique_together errors. Problem Right thats the introduction out of the way. My problem is that when multiple identical objects are saved in quick (or as near as simultaneous) succession, sometimes both get added even though the first being added should prevent the second. I have tested the code in the shell and it succeeds every time I run it. Thus my assumption is if say we have two objects being added Object A and Object B. Object A runs its check upon save() being called. Then the process saving Object B gets some time on the processor. Object B runs that same test, but Object A has not yet been added so Object B is added to the database. Then Object A regains control of the processor, and has allready run its test, even though identical Object B is in the database, it adds it regardless. My Thoughts The reason I fear multiprogramming could be involved is that each Object A and Object is being added through an API save view, so a request to the view is made for each save, thus not a single request with multiple sequential saves on objects. It might be the case that Apache is creating a process for each request, and thus causing the problems I think I am seeing. As you would expect, the problem only occurs sometimes, which is characteristic of multiprogramming or multiprocessing errors. If this is the case, is there a way to make the test and set parts of the save() method a critical section, so that a process switch cannot happen between the test and the set?

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  • Using Google Common Collection in GWT

    - by Jeeyoung Kim
    This is a simple problem, but I'm having problems with it... I'm trying to use Google common collection's Objects.equal() method in a GWT client code, but I'm keep getting the error "20:12:10.001 [ERROR] [gwt_regex] Line 39: No source code is available for type com.google.common.base.Objects; did you forget to inherit a required module?" Tried to Google for the answer, but couldn't find any answer regarding this - everyone just said "Google collection should work off the box with GWT".

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  • Is this Where condition in Linq-to-sql join correct?

    - by Pandiya Chendur
    I have the following Iqueryable method to show details of a singl material, public IQueryable<Materials> GetMaterial(int id) { return from m in db.Materials join Mt in db.MeasurementTypes on m.MeasurementTypeId equals Mt.Id where m.Mat_id equals id select new Materials() { Id = Convert.ToInt64(m.Mat_id), Mat_Name = m.Mat_Name, Mes_Name = Mt.Name, }; } Any suggestion....

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  • Get preferences in AppWidget Provider

    - by Brian515
    Hi all, I seem to be having trouble reading preferences from my AppWidgetProvider class. My code works in an Activity, but it does not in an AppWidgetProvider. Here is the code I am using to read back a boolean: SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0); boolean autoreplyon = settings.getBoolean("autoreplyon", false); However, I get the "The method getSharedPreferences(String, int) is undefined for the type widget" error (widget is the name of my AppWidgetProvider class). Thanks in advance for any suggestions!

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  • NullPointerException when generating RSA keys with BouncyCastle

    - by Tom Brito
    public static void main(String[] args) throws Exception { RSAKeyPairGenerator rsaKeyPairGen = new RSAKeyPairGenerator(); AsymmetricCipherKeyPair keyPair = rsaKeyPairGen.generateKeyPair(); } the rsaKeyPairGen is not null, but the generateKeyPair() method is throwing NullPointerException. What may be wrong? Error message: java.lang.NullPointerException at org.bouncycastle.crypto.generators.RSAKeyPairGenerator.generateKeyPair(Unknown Source) at pkg.main(Main.java:154)

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