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• Why delegate types are derived from MulticastDelegate class why not it directly derive from Delegate class?

  - by Vijay

  I have a very basic question regarding delegate types. I compared the memebers of Delegate and MulticastDelegate classes in object browser and I couldn't find any new additional member present in MulticastDelegate. I also noticed that the Delegate class has GetInvocationList virtual method. So I assume that the Delegate class should have the capability to hold references to multiple methods. If my assumption is correct I wonder why not custom delegate types directly derive from the Delegate class instead of MulticastDelegate class. Not sure what I am missing here. Please help me understand the difference.

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• Checking for a session variable... returns (Object reference not set to an instance of an object.)

  - by Chocol8

  In the Session_Start i have Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs) Session("login") = False End Sub and in a custom .aspx page i included the following... Public ReadOnly Property GetLoginState() As Boolean Get If Current.Session("login") Is Nothing Then Current.Session("login") = False End If Return Current.Session("login") End Get End Property Why i am getting error the error Object reference not set to an instance of an object. at line If Current.Session("login") Is Nothing Then while checking for the login state as follows? If GetLogin = False Then 'Do something End if I mean i have already created the instance on the Session_Start... Haven't i? What am i doing wrong here?

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• Glassfish JSF/EAR Apache 2.2 proxy_ajp_mod Referred Content Missing (images/links/etc)

  - by BillR

  Full disclosure: Since this seems to be more of a configuration issue, I deleted this from Stack (where it wasn't getting any response) and reposted here. The problem is how to change the requestContextPath served up by Glassfish behind mod_proxy_ajp. The site/app runs fine if connecting directly to Glassfish port 8080 which is ultimately not what I want to do. So I need help with configuration for my servers and jsf deployment. I can see the issue but don't know how to resolve it. It has to do with the requestContextPath. Simply put, Apache directs to http://mysite.com/welcome.xhtml which is correct and what I want, but the page is minus the images and styles. The issue is Glassfish itself is still pointing to http://mysite.com/myapp/*. So all links it serves in the app/site still refer via the requestContextPath. That is the /myapp/* part of http://mysite.com/myapp/welcome.xhtml. When I look in the page source, images which are referred to with relative links still point to the requestContextPath (that is, /myapp/). This is fixable but a real pain. However with page links I can't set the relative path. If I hover over the contact page link I see http://mysite.com/myapp/contact.xhtml, and if I click it, I get 404. You can see the /myapp/ context path in the page source as well. If I type in the URL http://mysite.com/contact.xhtml I get the page minus its referred links (requestContextPath). On Apache ProxyPass / ajp://littlewalterserver:8009/myapp-web/ ProxyPassReverse / ajp://littlewalterserver:8009/myapp_Project-web On Glassfish asadmin create-network-listener --listenerport 8009 --protocol http-listener-1 --jkenabled true jk-connector I have tried going in to Glassfish and setting the web app as the default web app. I have changed the / in glassfish-web.xml (and checked to make sure it was the same in the EAR file). How can I get Glassfish to not include the /myapp/ context in the URLs? This has to be easy if you know how, but I don't know how, can someone help out here? Thanks.

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• how to format (css) data loaded with $.load or $.get or $.ajax?

  - by user356981

  I need to load a piece of content html when an link in a menu is clicked; once loaded, the css format is not working properly, how do I re-format (re-styling via css) the loaded code? My code is: $('a', mainMenu).click(function() { ref = this.href; $('#content').load(ref + ' #content' function() { url = '../css/jquery-ui-1.8.2.custom.css'; //styling here if (document.createStyleSheet) document.createStyleSheet(url); else $('<link rel="stylesheet" type="text/css" href="'+url+'"/>').appendTo('head'); }); }) is it another way to load and re-style html (plugins perhaps)? thanks in adv'n.

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• UITableViewCell get nil

  - by MTA

  I create a UITableView with custom UITableViewCell,this is how i create the cell in cellForRowAtIndexPath: static NSString *CellIdentifier = @"SongsCell"; SongsCell *cell = (SongsCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil){ UIViewController *vc = [[[UIViewController alloc] initWithNibName:@"SongsCell" bundle:nil] autorelease]; cell = (SongsCell *) vc.view; } now i want to get all cells in the table info (parameter from cell) when a button pressed: for (int i = 0; i < [songTable numberOfRowsInSection:0]; i++) { NSIndexPath *indexPath = [NSIndexPath indexPathForRow:i inSection:0]; UITableViewCell *cell = [songTable cellForRowAtIndexPath:indexPath]; } Now i have a problem that this loop give me for cell a nil for all the cell that currently not seen in the table.

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• Is it poor practice to identify objects via an enumeration property, instead of using GetType()?

  - by James

  I have a collection of objects that all implement one (custom) interface: IAuditEvent. Each object can be stored in a database and a unique numeric id is used for each object type. The method that stores the objects loops around a List<IAuditEvent>, so it needs to know the specific type of each object in order to store the correct numeric id. Is it poor practice to have an enumeration property on IAuditEvent so that each object can identify itself with a unique enumeration value? I can see that the simplest solution would be to write a method that translates a Type into an integer, but what if I need an enumeration of audit events for another purpose? Would it still be wrong to have my enumeration property on IAuditEvent?

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• mysql_close(): supplied argument is not a valid MySQL-Link resource

  - by maxedison

  I'm trying to get the hang of using custom session handlers to store session data in a MySQL database. However, I keep getting the following warning: mysql_close(): supplied argument is not a valid MySQL-Link resource Here's the code I'm using, which I got from here: function _open(){ global $_sess_db; $_sess_db = mysql_connect("localhost", "root", "******"); if ($_sess_db) { return mysql_select_db('style', $_sess_db); } return false; } function _close(){ global $_sess_db; return mysql_close($_sess_db); //error happens here } The full text of the error message ultimately points to the final "return mysql_close($_sess_db);" line. I can confirm that the mysql_connect info does in fact work, and I do have the rest of the session handler functions defined as well. And in case it helps, I get these errors immediately upon page load, without actually calling any of the session handler functions, and without having any current sessions open.

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• How can I get my app ready for the iPhone 5

  - by RazorSharp

  Apple just announced the iPhone 5 with a 4 inch screen and a 16:9 aspect ratio. Of course, they only give developers two weeks to scramble to update their apps without being able to test. I'd like to update my app for the iPhone 5's new big screen, but there's nothing on Apple's developer site about the iPhone 5 or making your apps ready for a larger screen. It would be a pain to have to write my own logic for testing whether the device is an iPhone 5 and then displaying a custom storyboard file for it. Does anyone know how the new sizing works or if there are any hidden Xcode for this?

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• Drop down menu like the default iPad application menus

  - by Ryan French

  Hi Everyone, I'm currently working on my first iOS application to run on the iPad, and I've come across a problem. I have been asked to implement menu's similar to the ones in the default applications such as when you click on the "Calendars" button in the top left of the calendars app. Only issue is, I cant seem to find a standard UI object that looks like these, with the arrow connecting the menu to the button etc. Is this a standard UI component that I should be able to use, or will I have to imitate them by creating a custom object? Thanks for any help.

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• IIS, Apache, and header()

  - by MetalAdam

  I'm working on migrating a website from an external server (running Apache) to a local server (running IIS), and have come across an issue that I can't seem to resolve. The site is using a custom Joomla plugin that grabs some graphics stored in a mysql database (for e.g. http://www.norfolktourism.ca/index.php?option=com_bdirectory&task=image&cid=191). However, when I migrate the site to the local server, the images are broken. Upon further exploration, I've discovered that somehow, when ran on the local server, their seems to whitespace (as in a new line) gets processed before the header() function is processed, hence breaking the image (however, I don't get an error - just a broken image). I'm absolutely baffled as to what the issue may be, as the code works fine on the external Apache server. Would anyone have any suggestions on possible resolutions?

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• How to schedule heavy work for later display for Listviews?

  - by Pentium10

  I have a listview with 200 items. I use a custom view for each row. There is a code that takes some time to calculate, and because of this the list hangs out on scrolling and loads in slow (2-3sec). I have subclassed SimpleCursorAdapter, and using Filterable and SectionIndexer. I have in mind to show initially the name of the record, and put in a thread the calculation, and will show up later when it's done. How do I push back some work, and later update the listview to include the calculated data? This should show up on fly without user interaction.

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• Javascript Getting specific element (of parent) by name

  - by Fluidbyte

  I'm using custom tags to define sections in an application, so I have something like this: <mysection> <form> <input name="myfield"> </form> </mysection> I'm using the following and able to get the tag (printed to console, everything is groovy) var parent = document.getElementsByTagName('mysection'); The issue I'm having is finding the child field by name: var myfield = parent.getElementsByName("myfield"); ...as I don't want to pick up on any other 'sections' that might have an input with the name 'myfield'. EDIT: var parent = document.getElementsByTagName('mysection')[0]; was suggested and returns to console the section contents, however, getElementsByName throws an error: Uncaught TypeError: Object #<NodeList> has no method 'getElementsByName'

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• Object changed while deserialization

  - by neoms21

  I'm serializing an object and storing the serialized value in db and getting the deserialization to work fine as well after getting values from db. But problem occurs if the existing object is modified and a new property is added in the class. Then while deserializing it looks for that property in serialized text and upon not finding it there, I get the following error System.Runtime.Serialization.SerializationException: Member 'temp' was not found. Is there any way I can know if new property was not there while serialization and can skip that? I'm using custom serialization.

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• Execute code when Eclipse workbench loads

  - by Krt_Malta

  Hi! I'm writing an Eclipse plug-in and I've bumped into an issue. Amongst others I'm creating a new custom perspective. I need to execute some code when the workbench loads. I'm using a WorkbenchAdvisor and putting the code in the initialize method. However as it is now it's not being called... Apparently I need to call this PlatformUI.createAndRunWorkbench(display, new ApplicationWorkbenchAdvisor(); but I don't know where to put this... I can't put it in the createInitialLayout of the perspective because this is only called when the perspective is created for the first time. Any ideas please? Thanks and regards, Krt_Malta

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• Alignment issues with IE7-8

  - by user1868861

  I have major issues with cross browser compatibility. This picture illustrates the problem: What code do I put in for IE7-8 so that my menu aligns properly? Right now it looks right in firefox but nothing else. This the the menu code she had (there might be other code associated but I don't know, see actual site): .custom .menu { height:25px; border: 1px none; float:right; } I have tried things mentioned in other threads, overflow:hidden; / giving a width / margin: 0 auto etc. Nothing works and only ends up breaking Firefox as well.

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• What size should the background image in an MSI be?

  - by r_

  I am trying to create a Windows Installer package using Wix. I'm getting a lot of conflicting information about what size my custom background should be--the Wix documentation suggests a size of 500 x 314 pixels, but this leads to slight image distortion in the installer. I believe that I may be indirectly using the SplashBitmap property in Windows Installer, whose documentation suggests 480 x 320 is the correct size. When I try to use this image size, I also get artefacts in the image. Could anyone tell me what the correct size should be?

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• VSTO 3.0 Get/Change an excel 2007 workbook connection

  - by RQueiroga

  Hi all, I've struggling to find a way to get and change and excel 2007 workbook connection (Menu Data - Existing Connections - Connections on this Workbook).It's a connection (several actually) to a SQL Server and used in a pivot table. I've tried using Application.ActiveWorkbook.Connections or Globals.ThisWorkbook.Connections but they both return always Null..I've tried in an sheet event as well as in a custom ribbon's button event as well. The only way left I can think of is use to code a VBA method that does the work and then invoque it in my VSTO code, but it's not very elegant is it... Thanks in advanced :-)

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• Alfresco: Restrict categories that can be selected

  - by vegemite4me

  I have a custom content type in Alfresco (3.3 Enterprise, if it matters) and I can assign one or more categories to that content. So far so good. But can I restrict the set of possible categories to only a subset of all categories? If, for example, categories looked like below, how can I restrict the user to only selecting a region subcategory (e.g. Europe, South America, etc). Categories + Software Document Classification <- I do not want these to be picked. | + Utilisation Documents | + Software Descriptions | + ... | + Regions <- I want to restrict the | + Latin America user to this subset of categories. | + Europe | + ... + ... Is this possible?

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• sort list(of string()) using a variable index into string() as key - vb.net

  - by tullynyguy

  I have a List(of String()). I have written a custom comparer (implements IComparer(of string)) to do an alphanumeric sort. Is there a way to sort the List using a given index to determine which position in the String() to sort by? In other words one time I might sort by Index = 0 and another time by Index = 3. The length of all String() in the list is the same. For reference this question is similar to Sort List<String[]> except I am using VB.net and that question is hardwired to Index=0.

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• Dev Environment Tests Not 100% Compatible with Staging/Production in Rails

  - by aronchick

  We use a bunch of specific apps/APIs that (unfortunately) differ quite a bit from dev to staging/production. We use tests and continuous integration at each stage, but in dev, the tests fail annoyingly (throwing dialogs, etc - thanks Windows for the 64-bit notification!). I hate to write custom code, but are there some best practices for how to allow a subset of testing in ruby/rails - or for patching out specific tests when you're running on Windows? Some specific situations that: Identify.exe does not support 64-bit Windows and throws a dialog. Sethostname is not supported, and throws an error (at least it's command line).

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• Windows Search in Taskbar with my own results

  - by masterchris_99

  Hello, I want to provide a custom Search Connector for Windows Search without accessing a php or aspx website. Is this possible? I don't find anything. It is not possible to create tmp files because of the amount of files. I want to do a db query. Target: .net (C#) Here are 2 pics for a better explanation. What I have What I want the 3 source of information come from a external source via database query. regards Chris

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• Outlook 2010 Populating a Text Box

  - by Turkwise

  all! I'll try to be as detailed as possible in describing my predicament. I have a little background knowledge in Visual Basic, but none really in VBA or VBscript in Outlook 2010. I'm working with Outlook 2010. I created a custom form (this is my first time). I have a combo box named ComboBox1 and a text box named TextBox1. I am trying to auto-populate TextBox1 with a number based on the selection made from ComboBox1 (ex. I select Value 1 from ComboBox1 and TextBox1 populates with 124). I made an attempt using this code in the Visual Basic Editor (VBA version 7.0): Sub popBox() If ComboBox1 = "Value 1" Then TextBox1 = "124" End If End Sub My question is what am I doing wrong? Should I be using the VBscript editor, or is using VBA the proper thing to do? Is what I am asking even possible? Thank you all in advance!

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• New line before header()

  - by MetalAdam

  I'm working with a custom made Joomla script that generates an image from a blob in a database. However, when we moved it from an Apache server to an IIS server, the script is breaking. Upon investigation, it seems that now, there is a line break that is getting appended before the header function is being run (when I comment out the image portion, and do an echo "test";, test gets printed on line 2 of the source code. I've gone through the script over and over again, and through the many files in the component, and can't seem to find out where this new line is coming from. At all. I've tried using ob_start() and many similar functions, but nothing seems to work. I'm completely out of ideas, and don't know where to turn. Is there a way to trace what files are being called in the page, perhaps? Any thoughts on further steps?

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• @MustOverride annotation?

  - by Harrypotter2k5

  In .NET, one can specify a "mustoverride" attribute to a method in a particular superclass to ensure that subclasses override that particular method. I was wondering whether anybody has a custom java annotation that could achieve the same effect. Essentially what i want is to push for subclasses to override a method in a superclass that itself has some logic that must be run-through. I dont want to use abstract methods or interfaces, because i want some common functionality to be run in the super method, but more-or-less produce a compiler warning/error denoting that derivative classes should override a given method.

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• C++ Reading and Editing pixels of a bitmap image

  - by BettyD

  I'm trying to create a program which reads an image in (starting with bitmaps because they're the easiest), searches through the image for a particular parameter (i.e. one pixel of (255, 0, 0) followed by one of (0, 0, 255)) and changes the pixels in some way (only within the program, not saving to the original file.) and then displays it. I'm using Windows, simple GDI for preference and I want to avoid custom libraries just because I want to really understand what I'm doing for this test program. Can anyone help? In any way? A website? Advice? Example code? Thanks

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