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• how can a Win32 App plugin load its DLL in its own directory

  - by Jean-Denis Muys

  My code is a plugin for a specific Application, written in C++ using Visual Studio 8. It uses two DLL from an external provider. Unfortunately, my plugin fails to start because the DLLs are not found (I put them in the same directory as the plugin itself). When I manually move or copy the DLLs to the host application directory, then the plugin loads fine. This moving was deemed unacceptably cumbersome for the end user, and I am looking for a way for my plugin to load its DLLs transparently. What can I do? Relevant details: the host Application plugins are located in a directory mandated by the host application. That directory is not in the DLL search path and I don't control it. The plugin is itself packaged as a subdirectory of the plugin directory, holding the plugin code itself, but also any resource associated with the plugin (eg images, configuration files…). I control what's inside that subdirectory, called a "bundle", but not where it's located. the common plugin installation idiom for that App is for the end user to copy the plugin bundle to the plugin directory. This plugin is a port from the Macintosh version of the plugin. On the Mac there is no issue because each binary contains its own dynamic library search path, which I set as I needed to for my plugin binary. To set that on the Mac simply involves a project setting in the Xcode IDE. This is why I would hope for something similar in Visual Studio, but I could not find anything relevant. Moreover, Visual Studio's help was anything but, and neither was Google. A possible workaround would be for my code to explicitly tell Windows where to find the DLL, but I don't know how, and in any case, since my code is not even started, it hasn't got the opportunity to do so. As a Mac developer, I realize that I may be asking for something very elementary. If such is the case, I apologize, but I have run out of hair to pull out.

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• wrapping aspx user controls commands in a transaction

  - by Hans Gruber

  I'm working on heavily dynamic and configurable CMS system. Therefore, many pages are composed of a dynamically loaded set of user controls. To enable loose coupling between containers (pages) and children (user controls), all user controls are responsible for their own persistence. Each User Control is wired up to its data/service layer dependencies via IoC. They also implement an IPersistable interface, which allows the container .aspx page to issue a Save command to its children without knowledge of the number or exact nature of these user controls. Note: what follows is only pseudo-code: public class MyUserControl : IPersistable, IValidatable { public void Save() { throw new NotImplementedException(); } public bool IsValid() { throw new NotImplementedException(); } } public partial class MyPage { public void btnSave_Click(object sender, EventArgs e) { foreach (IValidatable control in Controls) { if (!control.IsValid) { throw new Exception("error"); } } foreach (IPersistable control in Controls) { if (!control.Save) { throw new Exception("error"); } } } } I'm thinking of using declarative transactions from the System.EnterpriseService namespace to wrap the btnSave_Click in a transaction in case of an exception, but I'm not sure how this might be achieved or any pitfalls to such an approach.

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• Django forms: how to dynamically create ModelChoiceField labels

  - by Henri

  I would like to create dynamic labels for a forms.ModelChoiceField and I'm wondering how to do that. I have the following form class: class ProfileForm(forms.ModelForm): def __init__(self, data=None, ..., language_code='en', family_name_label='Family name', horoscope_label='Horoscope type', *args, **kwargs): super(ProfileForm, self).__init__(data, *args, **kwargs) self.fields['family_name'].label = family_name_label . . self.fields['horoscope'].label = horoscope_label self.fields['horoscope'].queryset = Horoscope.objects.all() class Meta: model = Profile family_name = forms.CharField(widget=forms.TextInput(attrs={'size':'80', 'class': 'contact_form'})) . . horoscope = forms.ModelChoiceField(queryset = Horoscope.objects.none(), widget=forms.RadioSelect(), empty_label=None) The default labels are defined by the unicode function specified in the Profile definition. However the labels for the radio buttons created by the ModelChoiceField need to be created dynamically. First I thought I could simply override ModelChoiceField as described in the Django documentation. But that creates static labels. It allows you to define any label but once the choice is made, that choice is fixed. So I think I need to adapt add something to init like: class ProfileForm(forms.ModelForm): def __init__(self, data=None, ..., language_code='en', family_name_label='Family name', horoscope_label='Horoscope type', *args, **kwargs): super(ProfileForm, self).__init__(data, *args, **kwargs) self.fields['family_name'].label = family_name_label . . self.fields['horoscope'].label = horoscope_label self.fields['horoscope'].queryset = Horoscope.objects.all() self.fields['horoscope'].<WHAT>??? = ??? Anyone having any idea how to handle this? Any help would be appreciated very much.

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• Why does my App.Config codebase not help .NET locate my assembly?

  - by pkolodziej

  I have the following client application and its corresponding config file: namespace Chapter9 { class Program { static void Main(string[] args) { AppDomain.CurrentDomain.ExecuteAssembly("AssemblyPrivate.exe"); } } } <configuration> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <codeBase href="file://C:\Users\djpiter\Documents\Visual Studio 2008\Projects\70536\AssemblyPrivate\bin\Debug\AssemblyPrivate.exe"/> </dependentAssembly> </assemblyBinding> </runtime> </configuration> The AssemblyPrivate.exe does not have a public key, nor is it located in the GAC. As far as I know, the runtime should parse the app.config file before looking for an assembly in the client app directory. The unhandled exception (wrapped for readability) is: Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'file:///C:\Users\djpiter\Documents\Visual Studio 2008\Projects\70536\Chapter9\bin\Debug\AssemblyPrivate.exe' or one of its dependencies. The system cannot find the file specified. Why it is not working? I need to use dynamic binding (not static). Kind Regards, PK

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• Simplest PHP Routing framework .. ?

  - by David

  I'm looking for the simplest implementation of a routing framework in PHP, in a typical PHP environment (Running on Apache, or maybe nginx) .. It's the implementation itself I'm mostly interested in, and how you'd accomplish it. I'm thinking it should handle URL's, with the minimal rewriting possible, (is it really a good idea, to have the same entrypoint for all dynamic requests?!), and it should not mess with the querystring, so I should still be able to fetch GET params with $_GET['var'] as you'd usually do.. So far I have only come across .htaccess solutions that puts everything through an index.php, which is sort of okay. Not sure if there are other ways of doing it. How would you "attach" what URL's fit to what controllers, and the relation between them? I've seen different styles. One huge array, with regular expressions and other stuff to contain the mapping. The one I think I like the best is where each controller declares what map it has, and thereby, you won't have one huge "global" map, but a lot of small ones, each neatly separated. So you'd have something like: class Root { public $map = array( 'startpage' => 'ControllerStartPage' ); } class ControllerStartPage { public $map = array( 'welcome' => 'WelcomeControllerPage' ); } // Etc ... Where: 'http://myapp/' // maps to the Root class 'http://myapp/startpage' // maps to the ControllerStartPage class 'http://myapp/startpage/welcome' // maps to the WelcomeControllerPage class 'http://myapp/startpage/?hello=world' // Should of course have $_GET['hello'] == 'world' What do you think? Do you use anything yourself, or have any ideas? I'm not interested in huge frameworks already solving this problem, but the smallest possible implementation you could think of. I'm having a hard time coming up with a solution satisfying enough, for my own taste. There must be something pleasing out there that handles a sane bootstrapping process of a PHP application without trying to pull a big magic hat over your head, and force you to use "their way", or the highway! ;)

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• Android - attach data to views

  - by Leonti

  Hi! In my application I create dynamic rows in table much as in this tutorial: http://en.androidwiki.com/wiki/Dynamically_adding_rows_to_TableLayout for(int i = startDay; i < startDay + 7; i++){ /* Create a TextView to be the row-content. */ TextView day = new TextView(this); day.setText(Integer.toString(i)); day.setLayoutParams(new LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); day.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Log.i("Listener: ", "Click"); } So now when I click on a TextView I can register click event, but how do I determine which TextView was clicked? Not just an object which I get with an event but data like which day number was clicked? Ideally I would want to have data attached to every view I create dynamically. Something like data() method in Javascript jQuery. Right now I can see only 1 way to solve this - while creating TextView add id with data and when clicked - get id back and parse it to get my data. But it strikes me as ugly approach. Is there a way to attach arbitrary data to android views?

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• Problems initializing a final variable in Java

  - by froadie

  I keep running into slight variations of a problem in Java and it's starting to get to me, and I can't really think of a proper way to get around it. I have an object property that is final, but dynamic. That is, I want the value to be constant once assigned, but the value can be different each runtime. So I declare the class level variable at the beginning of the class - say private final FILE_NAME;. Then, in the constructor, I assign it a value - say FILE_NAME = buildFileName(); The problem begins when I have code in the buildFileName() method that throws an exception. So I try something like this in the constructor: try{ FILE_NAME = buildFileName(); } catch(Exception e){ ... System.exit(1); } Now I have an error - "The blank final field FILE_NAME may not have been initialized." This is where I start to get slightly annoyed at Java's strict compiler. I know that this won't be a problem because if it gets to the catch the program will exit... But the compiler doesn't know that and so doesn't allow this code. If I try to add a dummy assignment to the catch, I get - "The final field FILE_NAME may already have been assigned." I clearly can't assign a default value before the try-catch because I can only assign to it once. Any ideas...?

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• log-back and thirdparty writing to stdout. How to stop them getting interleaved.

  - by David Roussel

  First some background. I have a batch-type java process run from a DOS batch script. All the java logging goes to stdout, and the batch script redirects the stdout to a file. (This is good for me because I can ECHO from the script and it gets into the log file, so I can see all the java JVM command line args, which is great for debugging.) I may not I use slf4j API, and for the backend I used to use log4j, but recently switched to logback-classic. Although all my application code uses slf4j, I have a third party library that does it's own logging (not using a standard API) which also gets written to stdout. The problem is that sometimes log lines get mixed up and don't cleanly appear on separate lines. Here is an example of some messed up output: 2010-05-28 18:00:44.783 [thread-1 ] INFO CreditCorrelationElementBuilderImpl - Bump parameters exist for scenario, now attempting bumping. [indexDisplayName=STANDARD_S1_v300] 2010-05-28 18:01:43.517 [thread-1 ] INFO CreditCorrelationElementBuilderImpl - Found adjusted point in data, now applying bump. [point=0.144040000000000] 2010-05-28 18:01:58.642 [thread-1 ] DEBUG com.company.request.Request - Generated request for [dealName=XXX_20050225_01[5],dealType=GENERIC_XXX,correlationType=2,copulaType=1] in 73.8 s, Simon Stopwatch: [sys1.batchpricer.reqgen.gen INHERIT] total 1049 s, counter 24, max 74.1 s, min 212 ms 2010-05-28 18:05/28/10 18:02:20.236 INFO: [ServiceEvent] SubmittedTask:BC-STRESS_04_FZBC-2010-05-21-545024448189310126-23 01:58.658 [req-writer-2b ] INFO .c.g.r.o.OptionalFileDocumentOutput - Writing request XML to \\filserver\dir\file1.xml - write time: 21.4 ms - Simon Stopwatch: [sys1.batchpricer.reqgen.writeinputfile INHERIT] total 905 ms, counter 24, max 109 ms, min 10.8 ms 2010-05-28 18:02:33.626 [ResponseCallbacks-1: DriverJobSpace$TakeJobRunner$1] ERROR c.c.s.s.D.CalculatorCallback - Id:23 no deal found !! 2010-0505/28/10 18:02:50.267 INFO: [ServiceEvent] CompletedTask:BC-STRESS_04_FZBC-2010-05-21-545024448189310126-23:Total:24 Now comparing back to older log files, it seems the problem didn't occur when using log4j as the logging backend. So logback must be doing something different. The problem seems to be that although PrintStream.write(byte buf[], int off, int len) is synchronized, however I can see in ch.qos.logback.core.joran.spi.ConsoleTarget that System.out.write(int b) is the only write method called. So inbetween logback outputting each byte, the thirdparty library is managing to write a whole string to the stdout. (Not only is this cause me a problem, but it must also be a little inefficient?) Is there any other fix to this interleaving problem than patching the code to ConsoleTarget so it implments the other write methods? Any nice work arounds. Or should I just file a bug report? Here is my logback.xml: <configuration> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%-16thread] %-5level %-35.35logger{30} - %msg%n</pattern> </encoder> </appender> <root level="DEBUG"> <appender-ref ref="STDOUT" /> </root> </configuration> I'm using logback 0.9.20 with java 1.6.0_07.

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• Javascript: Onload if checkbox is checked, change li class

  - by BoDiE2003

  I have this code on javascript side: function changeSelectionStyle(id) { if(document.getElementById(id).className != 'yes'){ document.getElementById(id).className = 'yes'; } else{document.getElementById(id).className = '';} } And this on html: <ul> <li id="selectedAuthorities-4_1li" class=""> <input type="checkbox" id="selectedAuthorities-4_1" name="selectedAuthorities" value="ROLE_ADD_COMMENT_TO_CV" checked="checked" onload="changeSelectionStyle(this.id + 'li');" onclick="changeSelectionStyle(this.id + 'li'); checkFatherSelection(this.id);"> <a href="#" onclick="document.getElementById('selectedAuthorities-4_1').click(); return false;"> Agregar comentario <samp><b></b>Permite agregar comentario en el detalle.</samp> </a> </li> Well what I cant get work is when the checkbox is selected, on load, the JS should check it, and assign class="yes" to the li, here: <li id="selectedAuthorities-4_1li" class=""> What should I add to my original JS function to make that possible. Note that li ids are not static, they are dynamic, the html li id is generated.

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• Audio output from Silverlight

  - by leecarter

  I'm looking to develop a Silverlight application which will take a stream of data (not an audio stream as such) from a web server. The data stream would then be manipulated to give audio of a certain format (G.711 a-Law for example) which would then be converted into PCM so that additional effects can be applied (such as boosting the volume). I'm OK up to this point. I've got my data, converted the G.711 into PCM but my problem is being able to output this PCM audio to the sound card. I basing a solution on some C# code intended for a .Net application but in Silverlight there is a problem with trying to take a copy of a delegate (function pointer) which will be the topic of a separate question once I've produced a simple code sample. So, the question is... How can I output the PCM audio that I have held in a data structure (currently an array) in my Silverlight to the user? (Please don't say write the byte values to a text box) If it were a MP3 or WMA file I would play it using a MediaElement but I don't want to have to make it into a file as this would put a crimp on applying dynamic effects to the audio. I've seen a few posts from people saying low level audio support is poor/non-existant in Silverlight so I'm open to any suggestions/ideas people may have.

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• How to create a chart from mysql data?

  - by user187580

  Hello, I have some data and want to create some dynamic charts. I have looked on Google visualisation api .. It looks great but the problem is I am not very familiar with it. Any ideas, how I can set the data.setValue from mysql data. <script type='text/javascript'> google.load('visualization', '1', {'packages': ['geomap']}); google.setOnLoadCallback(drawMap); function drawMap() { var data = new google.visualization.DataTable(); data.addRows(6); data.addColumn('string', 'Country'); data.addColumn('number', 'Popularity'); data.setValue(0, 0, 'Germany'); data.setValue(0, 1, 200); data.setValue(1, 0, 'United States'); data.setValue(1, 1, 300); data.setValue(2, 0, 'Brazil'); data.setValue(2, 1, 400); data.setValue(3, 0, 'Canada'); data.setValue(3, 1, 500); data.setValue(4, 0, 'France'); data.setValue(4, 1, 600); data.setValue(5, 0, 'RU'); data.setValue(5, 1, 700); var options = {}; options['dataMode'] = 'regions'; var container = document.getElementById('map_canvas'); var geomap = new google.visualization.GeoMap(container); geomap.draw(data, options); }; </script> I can create chart using some other methods but just interested in using Google Visualisation API. Thanks.

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• In CSS, how to not float a 300px wide Div to the next line?

  - by Jian Lin

  Say, there is a bar that is styled at the bottom of the viewport, using position: fixed; bottom: 0; left: 0; width: 100%; height 50px; overflow: hidden and then there are 4 Divs inside it, each one floated to the left. Each Div is about 300px wide or can be more (depending on the content) Now, when the window is 1200 pixel wide, and we see all 4 Divs, but when the window is resize to be 1180 pixel wide (just 20 pixels less), then the whole 300px wide Div will disappear, because it is "floated" to the next line. So how can this be made so that, the Div will stay there and showing 280px of itself, rather than totally disappear? By the way, white-space: nowrap won't work as that probably has to do with not wrapping inline content. I was thinking of putting another Div inside this Div, having a fixed width of 1200px or 2000px, so that all Divs will float on the same level in this inner Div, and the outer Div will cut it off with the overflow: hidden. But this seems more like a hack... since the wide of all those Divs can be dynamic, and setting a fixed width of 1200px or 2000px seems like too much of a hack.

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• Set "Start With" value for Oracle sequence dynamically

  - by Allan

  I'm trying to create a release script that can be deployed on multiple databases, but where the data can be merged back together at a later date. The obvious way to handle this is to set the sequence numbers for production data sufficiently high in subsequent deployments to prevent collisions. The problem is in coming up with a release script that will accept the environment number and set the "Start With" value of the sequences appropriately. Ideally, I'd like to use something like this: ACCEPT EnvironNum PROMPT 'Enter the Environment Number: ' --[more scripting] CREATE SEQUENCE seq1 START WITH &EnvironNum*100000; --[more scripting] This doesn't work because you can't evaluate a numeric expression in DDL. Another option is to create the sequences using dynamic SQL via PL/SQL. ACCEPT EnvironNum PROMPT 'Enter the Environment Number: ' --[more scripting] EXEC execute immediate 'CREATE SEQUENCE seq1 START WITH ' || &EnvironNum*100000; --[more scripting] However, I'd prefer to avoid this solution as I generally try to avoid issuing DDL in PL/SQL. Finally, the third option I've come up with is simply to accept the Start With value as a substitution variable, instead of the environment number. Does anyone have a better thought on how to go about this?

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• How to not cache a php file where a cachemanifest is beeing called?

  - by Volmar

  Hi, i'm building a iphone app with jqtouch and i use a cachemanifest to cache all the static files (images, css, javascript) to make it load faster. However the page uses php for the dynamic content and i don't want to cache that. So i'm generating the cachemanifest with this php-script(manifest.php): <?php header('Content-Type: text/cache-manifest'); echo "CACHE MANIFEST\n"; $hashes = ""; $lastFileWasDynamic = FALSE; $dir = new RecursiveDirectoryIterator("."); foreach(new RecursiveIteratorIterator($dir) as $file) { if ($file->IsFile() && $file != "./manifest.php" && substr($file->getFilename(), 0, 1) != ".") { if(preg_match('/.php$/', $file)) { if(!$lastFileWasDynamic) { echo "\n\nNETWORK:\n"; } $lastFileWasDynamic = TRUE; } else { if($lastFileWasDynamic) { echo "\n\nCACHE:\n"; $lastFileWasDynamic = FALSE; } } echo $file . "\n"; $hashes .= md5_file($file); } } echo "\nNETWORK:\nhttp://chart.apis.google.com/\n\n# Hash: " . md5($hashes) . "\n"; ?> This actually works really good except for one irritating thing: From what i read somewhere the file that calls the cachemanifest is automaticly included in the manifest and is beeing cached. Wich means that my start-page index.php, where i call the cachemanifest is beeing cached. This leads to very irritating problems. is there any way to deal with this or any smart workaround? The page is in the cachemanifest listed as NETWORK, but it looks like this is beeing overruled by the fact that the cachemanifest is called from the file.

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• I want to request JSON inside of a WordPress page.

  - by gnucom

  Hello Everyone, For the last few hours I've been trying to set up this http://code.google.com/apis/books/docs/dynamic-links.html on a WordPress blog. Google's API sends back a JSON response (which is supposed to be "put" into _GBSBookInfo variable). However, that variable never is assigned so my javascript callback function explodes saying the variable doesn't exist. So far, all of my javascript is in the WordPress header. I tried this outside of WordPress and it works fine. This is the static page: <script src="http://books.google.com/books?bibkeys=0307346609&jscmd=viewapi&callback=response_handler"> This is the handler: function response_handler(data) { var bookInfo = _GBSBookInfo["0307346609"]; // the var that doesn't exist document.getElementById("test123").innerHTML = bookInfo.thumbnail_url; } Thanks for any help in advance, WordPress has been extremely frustrating by limiting so much! If I'm doing anything stupid please say so, I'm a new javascript programmer. EDIT: I've used firebug so far to identify the problem to be: the _GBSBookInfo variable never gets "created" or "exists". I'm not sure how javascript works at this level. Hopefully this helps. ERRORS: Error: _GBSBookInfo is not defined Line: 79

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• How to use html.grid control in spark view for asp.net mvc?

  - by Anusha

  class person() { public int Id{get;set;} public string Name{get;set;} } HomeController.cs ActionResult Index() { IList list=new[]{ new person { Id = 1, Name = "Name1" }, new person { Id = 2, Name = "Name2" }, new person { Id = 3, Name = "Name3" } }; ViewData["mygrid"]=list; return view(); } Home\Index.spark !{Html.Grid[[person]]("mygrid", (column=>{ column.For(c=>c.Id); column.For(c=>c.Name); })) Am getting the error Dynamic view compilation failed..error CS1501: No overload for method 'Grid' takes '2' arguments. I have added reference to MvcContrib.dll And added following namespace in the _global.spark file <use namespace="MvcContrib.UI"/> <use namespace="MvcContrib.UI.Grid"/> <use namespace="MvcContrib.UI.Pager"/> <use namespace="MvcContrib.UI.Grid.ActionSyntax"/> <use namespace="Microsoft.Web.Mvc.Controls"/> I want to bind the data to my grid in spark view.Can anybody help.

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• Mac OS X and static boost libs -> std::string fail

  - by Ionic

  Hi all, I'm experiencing some very weird problems with static boost libraries under Mac OS X 10.6.6. The error message is main(78485) malloc: *** error for object 0x1000e0b20: pointer being freed was not allocated *** set a breakpoint in malloc_error_break to debug [1] 78485 abort (core dumped) and a tiny bit of example code which will trigger this problem: #define BOOST_FILESYSTEM_VERSION 3 #include <boost/filesystem.hpp> #include <iostream> int main (int argc, char **argv) { std::cout << boost::filesystem::current_path ().string () << '\n'; } This problem always occurs when linking the static boost libraries into the binary. Linking dynamically will work fine, though. I've seen various reports for quite a similar OS X bug with GCC 4.2 and the _GLIBCXX_DEBUG macro set, but this one seems even more generic, as I'm neither using XCode, nor setting the macro (even undefining it does not help. I tried it just to make sure it's really not related to this problem.) Does anybody have any pointers to why this is happening or even maybe a solution (rather than using the dynamic library workaround)? Best regards, Mihai

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• jquery live and callbacks via wcf services

  - by vondip

  Hi all, I am writing a web app with asp.net, c# and jquery. Most of the time I'm writing dynamic html to the browser and using different web services to get the content needed. My call to the service: function WriteProducts(currentIndex, selectedCategoryId, callback) { var d = new Date(); MyAppServices.GetProducts(selectedCategoryId, currentIndex, 8, d.getTime().toString(), callback, function func() { alert('failure'); }); } The request usually gets translated to this (using firebug I monitored it): http://localhost:8080/MyApp/MyAppServices.svc/GetProducts?categoryId=0&fromIndex=0&toIndex=8&randomNumber=%221271800014441%22 The problem starts when part of the html controls dynamically rendered need to respond to click events. This is when I start using jquery's live method: $('.filter').live('click', function(event) { WriteProducts(0, selectedCategoryId, PopulateDivs); }); Now from some reason, the request passed to the server becomes this: http://localhost:8080/MyApp/MyAppServices.svc/GetProducts?categoryId=**%2217%22**&fromIndex=0&toIndex=8&randomNumber=%221271799783355%22 where did these %22 come from? If I take them out, the request passes successfully. I have no idea who inserted these %22, but they are causing havoc here! Guys, do you perhaps have a clue?

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• Constant CMS Session Expiry On 1&1 Cloud Server?

  - by leen3o

  I have a couple of 1&1's 'Dynamic Cloud Servers' and running Win2008R2 and they are setup as web servers, I have a number of Umbraco CMS installs on them and they have been running fine for over a year. On Saturday on BOTH servers, a very strange thing happened - As soon as I login to the CMS/Umbraco admin I am logged out with about 5 seconds? It's as if my session expires the moment I login? I have checked everything I can as I'm not really a server admin, and everything seems to be exactly as it was last week? Like I say this has happened EXACTLY the same time (Saturday) on TWO different servers? I'm just looking for ideas of what I should be looking for? Also the front end of the sites seem fine... Its only the backend when I login. I have gone to 1&1 about this, and as usual they have washed their hands saying its nothing to do with them - When I am certain it is. How can this happen on two different servers, and affect the same sites in exactly the same way? Any help, tips, things to try would be greatly appreciated.

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• How do I programmatically insert rows into a Silverlight DataGrid without binding?

  - by j0rd4n

  I am using a common Silverlight DataGrid to display results from a search. The "schema" of the search can vary from query to query. To accommodate this, I am trying to dynamically populate the DataGrid. I can set explicitly set the columns, but I am having trouble setting the ItemSource. All of the MSDN examples set the ItemSource to a collection with a strong type (e.g. a Custom type with public properties matching the schema). The DataGrid then uses reflection to scour the strong type for public properties that will match the columns. Since my search results are dynamic, I cannot create a strong type to represent what comes back. Can I not just give the DataGrid an arbitrary list of objects so long as the number of objects in each list matches the number of columns? Anyone know if this is possible? I would like to do something similar to this: List<List<object>> myResults = <voodoo that populates the result list> myDataGrid.ItemsSource = myResults;

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• Declaration, allocation and assignment of an array of pointers to function pointers

  - by manneorama

  Hello Stack Overflow! This is my first post, so please be gentle. I've been playing around with C from time to time in the past. Now I've gotten to the point where I've started a real project (a 2D graphics engine using SDL, but that's irrelevant for the question), to be able to say that I have some real C experience. Yesterday, while working on the event system, I ran into a problem which I couldn't solve. There's this typedef, //the void parameter is really an SDL_Event*. //but that is irrelevant for this question. typedef void (*event_callback)(void); which specifies the signature of a function to be called on engine events. I want to be able to support multiple event_callbacks, so an array of these callbacks would be an idea, but do not want to limit the amount of callbacks, so I need some sort of dynamic allocation. This is where the problem arose. My first attempt went like this: //initial size of callback vector static const int initial_vecsize = 32; //our event callback vector static event_callback* vec = 0; //size static unsigned int vecsize = 0; void register_event_callback(event_callback func) { if (!vec) __engine_allocate_vec(vec); vec[vecsize++] = func; //error here! } static void __engine_allocate_vec(engine_callback* vec) { vec = (engine_callback*) malloc(sizeof(engine_callback*) * initial_vecsize); } First of all, I have omitted some error checking as well as the code that reallocates the callback vector when the number of callbacks exceed the vector size. However, when I run this code, the program crashes as described in the code. I'm guessing segmentation fault but I can't be sure since no output is given. I'm also guessing that the error comes from a somewhat flawed understanding on how to declare and allocate an array of pointers to function pointers. Please Stack Overflow, guide me.

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• Compiling code at runtime, loading into current appdomain.

  - by Richard Friend

  Hi Im compiling some code at runtime then loading the assembly into the current appdomain, however when i then try to do Type.GetType it cant find the type... Here is how i compile the code... public static Assembly CompileCode(string code) { Microsoft.CSharp.CSharpCodeProvider provider = new CSharpCodeProvider(); ICodeCompiler compiler = provider.CreateCompiler(); CompilerParameters compilerparams = new CompilerParameters(); compilerparams.GenerateExecutable = false; compilerparams.GenerateInMemory = false; foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies()) { try { string location = assembly.Location; if (!String.IsNullOrEmpty(location)) { compilerparams.ReferencedAssemblies.Add(location); } } catch (NotSupportedException) { // this happens for dynamic assemblies, so just ignore it. } } CompilerResults results = compiler.CompileAssemblyFromSource(compilerparams, code); if (results.Errors.HasErrors) { StringBuilder errors = new StringBuilder("Compiler Errors :\r\n"); foreach (CompilerError error in results.Errors) { errors.AppendFormat("Line {0},{1}\t: {2}\n", error.Line, error.Column, error.ErrorText); } throw new Exception(errors.ToString()); } else { AppDomain.CurrentDomain.Load(results.CompiledAssembly.GetName()); return results.CompiledAssembly; } } This bit fails after getting the type from the compiled assembly just fine, it does not seem to be able to find it using Type.GetType.... Assembly assem = RuntimeCodeCompiler.CompileCode(code); string typeName = String.Format("Peverel.AppFramework.Web.GenCode.ObjectDataSourceProxy_{0}", safeTypeName); Type t = assem.GetType(typeName); //This works just fine.. Type doesntWork = Type.GetType(t.AssemblyQualifiedName); Type doesntWork2 = Type.GetType(t.Name); ....

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• InvalidCastException when getting Text from a Label referenced by dynamicaly built String, Fix?

  - by Chris

  NET Version: 3.5 Ok, I recieve an error (System.InvalidCastException was unhandled. Message="Unable to cast object of type 'System.Windows.Forms.Control[]' to type 'System.Windows.Forms.Label'.") when trying to get Text from a Label referenced by a dynamicly built string. Here's my situation; I have an array of 250 labels named l1 - l250. What I want to do is loop through them using this while statement: int c = 1; while (c < 251) { string k = "l" + c.ToString(); //dynamic name of Control(Label) object ka = Controls.Find(k, true); string ct = ((Label)ka).Text; //<<Error Occurs Here build = build + ct; c++; } and get the text value of each to build a string named build. I don't get any build errors, just this while debuging. While debuging I can go down to view my local variables. When looking through these, I can view the contents of object ka; it does contain the correct Text value of the correct Label I want to "access". I just don't understand how to get there. The text value is listed under "[0]" which is the only subcatagory for "ka".

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• template specialization of a auto_ptr<T>

  - by Chris Kaminski

  Maybe I'm overcomplicating things, but then again, I do sort of like clean interfaces. Let's say I want a specialization of auto_ptr for an fstream - I want a default fstream for the generic case, but allow a replacement pointer? tempate <> class auto_ptr<fstream> static fstream myfStream; fstream* ptr; public: auto_ptr() { // set ptr to &myfStream; } reset(fstream* newPtr) { // free old ptr if not the static one. ptr = newPtr }; } Would you consider something different or more elegant? And how would you keep something like the above from propagating outside this particular compilation unit? [The actual template is a boost::scoped_ptr.] EDIT: It's a contrived example. Ignore the fstream - it's about providing a default instance of object for an auto_ptr. I may not want to provide a specialized instance, but would like to keep the auto_ptr semantics for this static default object. class UserClass { public: auto_ptr<fstream> ptr; UserClass() { } } I may not provide an dynamic object at construction time - I still want it to have a meaningful default. Since I'm not looking at ownership-transfer semantics, it really shouldn't matter that my pointer class is pointing to a statically allocated object, no?

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• Approach for fixing NoClassDefFoundError?

  - by DJC

  I'm seeing this question is getting asked a lot in many different contexts. Perhaps we can set some strategies for locating and fixing it? I'm noobish myself so all I can contribute are horror stories and questions, sorry... It seems this is thrown when a class is visible at compile time but not at run time... how can this happen? In my case I am developing an app that uses the Google APIs, in Eclipse, for the Android platform. I've configured the Project Properties / Java Build Path / Libraries to include the gdata .jars and all is well. When I execute in the emulator I get a force close and the logcat shows a NoClassDefFoundError on a simple new ContactsService("myApp"); I've also tried a new CalendarService("myApp") with the same results. Is it possible or desirable to statically bind at compile time to avoid the problem? How could dynamic binding of an add-on library work in the mobile environment anyway? Either it has to be bound into my .apk or else I need to "install" it? ... hmmm. Advice much appreciated.

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