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• How test a Delphi app with Application Verifier 4.0?

  - by mamcx

  I download the Application Verifier 4.0 to test my App for check if could have problems on Vista/7. I run from Delphi 2010 debugger, and stop in CPU view. Obviously, I don't understand anything about assembler!. So, I try running directly from the windows explorer, and the App die. (In fact, I don't understand well what exactly will do App Verifier: I expect some kind of friendly message). This is what i get: 7C81A3E2 C3 ret 7C81A3E3 90 nop 7C81A3E4 8BFF mov edi,edi ntdll.DbgUserBreakPoint: 7C81A3E6 CC int 3 7C81A3E7 C3 ret 7C81A3E8 8BFF mov edi,edi 7C81A3EA 8B442404 mov eax,[esp+$04] 7C81A3EE CC int 3 7C81A3EF C20400 ret $0004 ntdll.NtCurrentTeb: 7C81A3F2 64A118000000 mov eax, fs:[$00000018] 7C81A3F8 C3 ret ntdll.RtlInitString: 7C81A3F9 57 push edi Loading: :7c81a3e2 ntdll.DbgBreakPoint + 0x1 :10003b68 ; C:\WINDOWS\system32\vrfcore.dll :00396a9d ; C:\WINDOWS\system32\vfbasics.dll :00397316 ; C:\WINDOWS\system32\vfbasics.dll :7c84bcdb ; ntdll.dll :7c8316f8 ; ntdll.dll :7c83154f ; ntdll.dll :7c82855e ntdll.KiUserExceptionDispatcher + 0xe :0040aa00 GetUILanguages + $80 :0040b298 GetResourceModuleName + $124 :0040afde LoadResourceModule + $7A :0040a134 DelayLoadResourceModule + $2C :00406c40 @StartExe + $44 :77e6f23b ; C:\WINDOWS\system32\KERNEL32.dll

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• JQuery-UI Drag, Drop and Re-Drag Clones on Re-Drag

  - by amarcy

  I am using the following code to extend the JQuery-UI demos included with the download. I am trying to set up a container that the user can drag items into and then move the items around within the container. I incorporated the answer from http://stackoverflow.com/questions/867469/jquery-draggable-clone which works with one problem. <script> $(document).ready(function() { $("#droppable").droppable({ accept: '.ui-widget-content', drop: function(event, ui) { if($(ui).parent(":not(:has(#id1))")){ $(this).append($(ui.helper).clone().attr("id", "id1")); } $("#id1").draggable({ containment: 'parent', }); } }); $(".ui-widget-content").draggable({helper: 'clone'}); }); </script> div class="demo"> <div id="draggable" class="ui-widget-content"> <p>Drag me around</p> </div> <div id="droppable" class="ui-widget-header"> <p>Drop here</p> </div> When an item is dropped onto the droppable container it can be dragged one time and when it is dropped after that drag it loses its dragging capability. How do I allow for the item to be dragged multiple times after it has been added to the droppable container?

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• Headless, scriptable Firefox/Webkit on linux?

  - by Parand

  I'm looking to automate some web interactions, namely periodic download of files from a secure website. This basically involves entering my username/password and navigating to the appropriate URL. I tried simple scripting in Python, followed by more sophisticated scripting, only to discover this particular website is using some obnoxious javascript and flash based mechanism for login, rendering my methods useless. I then tried HTMLUnit, but that doesn't seem to want to work either. I suspect use of Flash is the issue. I don't really want to think about it any more, so I'm leaning towards scripting an actual browser to log in and grab the file I need. Requirements are: Run on linux server (ie. no X running). If I really need to have X I can make that happen, but I won't be happy. Be reliable. I want to start this thing and never think about it again. Be scriptable. Nothing too sophisticated, but I should be able to tell the browser the various steps to take and pages to visit. Are there any good toolkits for a headless, X-less scriptable browser? Have you tried something like this and if so do you have any words of wisdom?

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• Create CAB file for ActiveX installation for IE

  - by vikasde

  I created a cab file that contains my activex using CABARC.exe. I also created an .inf file. My inf file looks like this: [version] signature="$CHICAGO$" AdvancedINF=2.0 [Add.Code] MySetup.exe=MySetup.exe [MySetup.exe] file-win32-x86=thiscab clsid={49892510-B520-4b35-8ADF-57084DD2F717} My html looks like this: <object name="secondobj" style='display:none' id='TestActivex' classid='CLSID:49892510-B520-4b35-8ADF-57084DD2F717' codebase='http://myurl/MySetup.cab#version=1,0,0,0'></object> I created the CABARC using the following commmand: C:\tools\Cab\BIN>CABARC.EXE N MySetup.cab MySetup.msi setup.inf I also added http://myurl to the trusted sites. Now the first time I opened the html page in IE, I saw a yellow bar, which I accepted. However it never installed the activex control. I dont see the installation in my program files nor can I see anything in the event logs or in the temporary download folder or in the "manage add-ons". Now everytime I open the webpage in IE, I do not see the yellow bar anymore. Can anybody help me out here please?

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• What am I doing wrong with HttpResponse content and headers when downloading a file?

  - by Slauma

  I want to download a PDF file from a SQL Server database which is stored in a binary column. There is a LinkButton on an aspx page. The event handler of this button looks like this: protected void LinkButtonDownload(object sender, EventArgs e) { ... byte[] aByteArray; // Read binary data from database into this ByteArray // aByteArray has the size: 55406 byte Response.ClearHeaders(); Response.ClearContent(); Response.BufferOutput = true; Response.AddHeader("Content-Disposition", "attachment; filename=" + "12345.pdf"); Response.ContentType = "application/pdf"; using (BinaryWriter aWriter = new BinaryWriter(Response.OutputStream)) { aWriter.Write(aByteArray, 0, aByteArray.Length); } } A "File Open/Save dialog" is offered in my browser. When I store this file "12345.pdf" to disk, the file has a size of 71523 Byte. The additional 16kB at the end of the PDF file are the HTML code of my page (as I can see when I view the file in an editor). I am confused because I was believing that ClearContent and ClearHeaders would ensure that the page content is not sent together with the file content. What am I doing wrong here? Thanks for help!

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• Hooking the http/https protocol in IE causes GET requests to be sequential

  - by watsonmw

  I'm using the PassthruAPP method to hook into HTTP/HTTPS requests made by IE. It's working well for the most part, however I noticed a problem. Only one download thread is active at a time. I can see two IInternetProtocol objects getting created, but IE uses only one at a time. This is happening with IE7. The odd thing is that the problem occurs when overriding the existing default HTTP/HTTPS handler, even if the handler is not the one being used to make the request. E.g. Registering a handler for the HTTPS protocol will cause HTTP requests to be made sequentially, even though HTTP requests are not hooked. I installed Google Gears and it has the same problem. This always happens for the first few items on the page, but it seems that after the document complete is issued, concurrent downloads can occur again. For example Javascript code that is executed after the page has finished loading can load images concurrently just fine. One option is to try to IAT patch the 'IInternetProtocol' registered for HTTP requests, but Google Gears does this already and it has the same problem. I know installing a HTTP Proxy is another option, but I don't want to monkey with the users' HTTP Proxy settings if there another option.

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• PLKs and Web Service Software Factory

  - by Nix

  We found a bug in Web Service Software Factory a description can be found here. There has been no updates on it so we decided to download the code and fix it ourself. Very simple bug and we patched it with maybe 3 lines of code. However* we have now tried to repackage it and use it and are finding that this is seemingly an impossible process. Can someone please explain to me the process of PLKs? I have read all about them but still don't understand what is really required to distribute a VS package. I was able to get it to load and run using a PLK obtained from here, but i am assuming that you have to be a partner to get a functional PLK that will be recognized on other peoples systems? Every time i try and install this on a different computer I get a "Package Load Failure". Is the reason I am getting errors because I am not using a partner key? Is there any other way around this? For instance is there any way we can have an "internal" VS package that we can distribute? Edit Files I had to change to get it to work. First run devenv PostInstall.proj Generate your plks and replace ##Package PLK## (.resx files) --Just note that package version is not the class name but is "Web Service Software Factory: Modeling Edition" -- And you need to remove the new lines from the key ProductDefinitionRegistryFragment.wxi line 1252(update version to whatever version you used in plk) Uncomment all // [VSShell::ProvideLoadKey("Standard", Constant in .tt files.

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• Installing Epic (Eclipse Plugin) in Pulse Explorer

  - by The Daemons Advocate

  I'm trying to install EPIC using the Pulse Explorer for Eclipse (as I'm rather fond of sharing profiles :). When I go to install the plugin under my account, I get asked for a login into http://e-p-i-c.sf.net. However, the Epic's team documentation doesn't mention anything about a login. Here's what I've done: Gone into Pulse and created a new profile based on Eclipse Classic. Navigated to Software, added the EPIC software site to list of public sites, and chosen to install it. Added Pulse item to profile. Run the installer. The error shows up while it's all downloading/installing. Login boxes start to appear for epic related components, and I don't have credentials to put in so all I can do is hit cancel. If I hit cancel, the process fails at the end with the generic error message: "an unexpected error occurred preparing to install and/or launch the selected profile". Bundles that are failing to download are: org.epic.debug org.epic.doc org.epic.lib org.epic.perleditor org.epic.regxp org.epic.source The component that's exploding is called: org.eclipse.equinox.internal.p2.repository.Credentials$LoginCancelledException I've had the same effect on Pulse 0.5.x and 0.6.x. No clue where to go from here. Might contact the EPIC and Pulse teams and ask them, but thought that I'd get a better response from here. I'm somewhat sure I'm doing something wrong.

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• Qt 4.x: how to implement drag-and-drop onto the desktop or into a folder?

  - by Jeremy Friesner

  Hi all, I've written a little file-transfer application written in C++ using Qt 4.x ... it logs into a server, shows the user a list of files available on the server, and lets the user upload or download files. This all works fine; you can even drag a file in from the desktop (or from an open folder), and when you drop the file icon into the server-files-list-view, the dropped file gets uploaded to the server. Now I have a request for the opposite action as well... my users would like to be able to drag a file out of the server-files-list-view and onto the desktop, or into an open folder window, and have that file get downloaded into that location. That seems like a reasonable request, but I don't know how to implement it. Is there a way for a Qt application to find out the directory corresponding to where "drop event" occurred, when the icon was dropped onto the desktop or into an open folder window? Ideally this would be a Qt-based platform-neutral mechanism, but if that doesn't exist, then platform-specific mechanisms for MacOS/X and Windows (XP or higher) would suffice. Any ideas?

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• How to estimate size of data to transfer when using DbCommand.ExecuteXXX?

  - by Yadyn

  I want to show the user detailed progress information when performing potentially lengthy database operations. Specifically, when inserting/updating data that may be on the order of hundreds of KB or MB. Currently, I'm using in-memory DataTables and DataRows which are then synced with the database via TableAdapter.Update calls. This works fine and dandy, but the single call leaves little opportunity to glean any kind of progress info to show to the user. I have no idea how much data is passing through the network to the remote DB or its progress. Basically, all I know is when Update returns and it is assumed complete (barring any errors or exceptions). But this means all I can show is 0% and then a pause and then 100%. I can count the number of rows, even going so far to cound how many are actually Modified or Added, and I could even maybe calculate per DataRow its estimated size based on the datatype of each column, using sizeof for value types like int and checking length for things like strings or byte arrays. With that, I could probably determine, before updating, an estimated total transfer size, but I'm still stuck without any progress info once Update is called on the TableAdapter. Am I stuck just using an indeterminate progress bar or mouse waiting cursor? Would I need to radically change our data access layer to be able to hook into this kind of information? Even if I can't get it down to the precise KB transferred (like a web browser file download progress bar), could I at least know when each DataRow/DataTable finishes or something? How do you best show this kind of progress info using ADO.NET?

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• Question on MacPorts comment: "manually remove the catalog entry for this port when you uninstall it

  I was recently installing Inkscape with MacPorts through a Mac OSX Leopard Terminal using "sudo port install inkscape" And during the search-and-download for dependencies, many of these type of comments were printed: ###################################################################### # As MacPorts does not currently have a post-deactivate hook, # you will need to ensure that you manually remove the catalog # entry for this port when you uninstall it. To do so, run # "xmlcatmgr remove nextCatalog /opt/local/share/xsl/docbook-xsl/catalog.xml". ###################################################################### Can anyone tell me what this message means? I do not understand what "it" refers to in the phrase 'ensure that you manually remove the catalog entry for this port when you uninstall it'. Does 'it' refer to a 'this port'? How is a port uninstalled? Mostly: When will I have to manually remove the catalog entry using the provided command? Also, what is a catalog entry? is that what appears when I type "sudo port search inkscape" ? I am kind of a MacPorts install n00b. Thanks very much for your time.

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• How to use jaxp 3 with jdk 1.6?

  - by Michal

  I'm trying to migrate application from jdk 1.5 to jdk 1.6 without introducing any changes visible to the end user. Application's output is an xml generated using jaxp which is a part of the jdk libraries. Since jaxp versions are different in jdk 1.5 and 1.6, the resulting xml looks different in each version. An example: DatatypeFatory.newInstance().newDuration(60) produces 'PT2H17M0.000S' in jdk 1.5 and 'P0Y0M0DT2H17M0.000S' in jdk 1.6. Both are correct, but i want to avoid any visible changes. Classes like DatatypeFactory have a mechanism which allows specifying which implementation should be used, but it relies on specifying full qualified class name. So theoretically i could download jaxp jars with the same version which is used in jdk 1.5 and let the application use them. Unfortunately the package and class names are the same in both versions, so i would have to somehow tell java to load classes from jar and not jdk. I was trying to put jaxp jars at the beginning of the classpath, but it didn't help. Is it possible to tell java to load classes from external jar and not jdk libraries? Can i solve this problem in any other way? Thanks in advance

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• Maximum page fetch with maximum bandwith

  - by Ehsan

  Hi I want to create an application like a spider I've implement fetching page as the following code in multi-thread application but there is two problem 1) I want to use my maximum bandwidth to send/receive request, how should I config my request to do so (Like Download Accelerator application and the like) cause I heard the normal application will use 66% of the available bandwidth. 2) I don't know what exactly HttpWebRequest.KeepAlive do, but as its name implies I think i can create a connection to a website and without closing the connection sending another request to that web site using existing connection. does it boost performance or Im wrong ?? public PageFetchResult Fetch() { PageFetchResult fetchResult = new PageFetchResult(); try { HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(URLAddress); HttpWebResponse resp = (HttpWebResponse)req.GetResponse(); Uri requestedURI = new Uri(URLAddress); Uri responseURI = resp.ResponseUri; string resultHTML = ""; byte[] reqHTML = ResponseAsBytes(resp); if (!string.IsNullOrEmpty(FetchingEncoding)) resultHTML = Encoding.GetEncoding(FetchingEncoding).GetString(reqHTML); else if (!string.IsNullOrEmpty(resp.CharacterSet)) resultHTML = Encoding.GetEncoding(resp.CharacterSet).GetString(reqHTML); req.Abort(); resp.Close(); fetchResult.IsOK = true; fetchResult.ResultHTML = resultHTML; } catch (Exception ex) { fetchResult.IsOK = false; fetchResult.ErrorMessage = ex.Message; } return fetchResult; }

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• iphone: problem playing youtube mp4's over 3g network

  - by Alex1987

  Hi guys I'm am developing an app that enables the user to stream youtube mp4 videos on the iphone. What I did was very simple - I just took a url of the form http://youtube.com/get_video?*&fmt=18 (for example http://youtube.com/get_video?video_id=KUXGVfmrEN4&&t=vjVQa1PpcFNrxzfbeI6WrJfK6s0BdQ9ypMgV_6yqwjo=&fmt=18) and used mpmovieplayercontroller or UIWebView to stream the video. It works great over WIFI but doesn't work at all on 3g network . On 3g I get a blank page in the UIWebView or file format not supported on mpmovieplayercontroller. Does youtube block access from 3g networks to its mp4 videos? How to bypass this? You can check this easily yourself on your own iphone by preforming the following steps: 1. Obtain the download link. You can do this easily by downloading the following plugin for firefox: https://addons.mozilla.org/en-US/firefox/addon/13990. 2. Email the link to your email. 3. Open your mail on the iphone and click on the link. Try this on WIFI and 3g.

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• Is there a standard mapping between JSON and Protocol Buffers?

  - by Daniel Earwicker

  From a comment on the announcement blog post: Regarding JSON: JSON is structured similarly to Protocol Buffers, but protocol buffer binary format is still smaller and faster to encode. JSON makes a great text encoding for protocol buffers, though -- it's trivial to write an encoder/decoder that converts arbitrary protocol messages to and from JSON, using protobuf reflection. This is a good way to communicate with AJAX apps, since making the user download a full protobuf decoder when they visit your page might be too much. It may be trivial to cook up a mapping, but is there a single "obvious" mapping between the two that any two separate dev teams would naturally settle on? If two products supported PB data and could interoperate because they shared the same .proto spec, I wonder if they would still be able to interoperate if they independently introduced a JSON reflection of the same spec. There might be some arbitrary decisions to be made, e.g. should enum values be represented by a string (to be human-readable a la typical JSON) or by their integer value? So is there an established mapping, and any open source implementations for generating JSON encoder/decoders from .proto specs?

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• Broadcasting an intent to a specific component.

  - by Nic Strong

  I have an activity that is starting a background operation in another service. This activity receives various notifications from this service. As part of the intent I use to initiate the background operation I pass extra data with the context of my activity so the background service can broadcast intents back to me (the download service is a good example of this usage). So in the activity I use the following to attach the context: intent.putExtra(Intents.EXTRA_NOTIFICATION_PACKAGE, IntentTestActivity.this.getPackageName()); intent.putExtra(Intents.EXTRA_NOTIFICATION_CLASS, IntentTestActivity.class.getCanonicalName()); intent.putExtra(Intents.EXTRA_NOTIFICATION_EXTRAS, myContext); I register for the notifications in the activity: IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction(Intents.ACTION_NOTIFICATION); intentFilter.addCategory(Intents.CATEGORY_COMPLETION); intentFilter.addCategory(Intents.CATEGORY_PROGRESSS); Intent intent = registerReceiver(receiver, intentFilter); In the background service I send notifications with the following code: void broadcastNotification(String action, String category, String packageName, String className, String extras, int operationResult) { Intent intent = new Intent(action); intent.addCategory(category); intent.setClassName(packageName, className); if (extras != null) { intent.putExtra(Intents.EXTRA_NOTIFICATION_EXTRAS, extras); } intent.putExtra(Intents.EXTRA_OPERATION_RESULT, operationResult); context.sendBroadcast(intent); } My problem is that the above broadcast will never be received. If however I comment out the line intent.setClassName(packageName, className); Then the broadcast is received. Is it a problem with my filter? Do I have to specify intents intended for a specific component? Or cannot I not use such fine grain control over the delivery of broadcasts. Thanks, Nic

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• How to deploy EJB on server?

  - by shekhar

  Hi, I am learning EJB3 from last few days. I have many questions regarding EJB, application servers and deployment of EJB. To start with, I have created one simple helloworld stateless session bean but I don't know how to deploy it on server. It has single bean class, bean interface and one servlet client. I have used eclipse to develop this project. None of the books that I read gives step by step details about how to put EJB on server and how to access those beans. I have JBoss 6 server and I also have JEE budle downloaded from sun website. Does this JEE bundle contains Glassfish server? or do I need to download it seperately? Can anyone please give me step by step details of how to put my bean and its client on server (JBoss or JEE)? and why do we need to include bean interface class in EJB client code? I mean either we need to keep client and bean in same package or if we keep them in seperate packages we need to import bean interfaces in client code. Am I right? Thanks and Regards, Chandrashekhar

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• open source business intelligence solutions

  - by opensas

  which open source business intelligence solution would you recommend? All I need is to build some cubes and let the end user play with dimensions, filter data, sort, etc, and once it's done being able to export it to excel... I'd like the solution to be as simple and easy on resources as possible, and also I'd like it to be as much open source as possible, by the way. I've heard that many solutions available do have many restrictions when it comes to there community version. I'd like to ear your advices and the pros/cons of each alternative, to help me choose the right tool, and if you could point me to some basic demo and tutorial to get started. thanks a lot ps: I'm using sql server databases, they aren't huge databases (in general less than a million records) and I doesn't necessarily have to work on "live" data... ps: some useful links: http://en.wikipedia.org/wiki/Business_intelligence_tools#Open_source_free_products http://www.manageability.org/blog/stuff/open-source-java-business-intelligence http://www.jaspersoft.com/jasperanalysis http://community.pentaho.com/projects/bi_platform/ http://community.pentaho.com/faq/platform_licensing.php http://www.eclipse.org/birt/phoenix/ http://www.spagoworld.org/xwiki/bin/view/SpagoWorld/ http://docs.google.com/viewer?a=v&q=cache:vhsqMQXwCUkJ:www.ow2.org/xwiki/bin/download/Activities/EuropeLocalChapterWebinars/ELCWebinarOSBI.pdf+open+source+business+intelligence&hl=en&pid=bl&srcid=ADGEESgpJJ2MqaKprJQOF2jX2UXCZQjg_asv8d7EVYtq0Vma-e-tR1tFxS-I0SOW0IhJC5acYc94rkDOrgP1WckCp_vk4qhKqR9y2Klp_u9cL8hlXoKoUpMkpAd5wabu61A4W0y15E5P&sig=AHIEtbRJ5FAI-3YK-qtayPjKkF_CwOgZag

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• Browser security when calling HTTP assets via a SWF on a HTTPS site

  - by Mark Ursino

  We have a site that runs on HTTPS and needs to pull in various JS assets to run a video player on the page. We get a browser security warning on this page because the JS files we are externally calling are being accessed via HTTP, not HTTPS. E.g. // HTTP reference on a HTTPS site <script src="http://the-cdn.tld/player.js"></script> Simply accessing this one JS assets via HTTP and not HTTPS will cause the browser security warning which we need to get rid of. The provider of the JS file does not support an HTTPS equivalent (like Google Analytics does). We would ideally love to just do the following, but the provider does not have this: // HTTPS reference on a HTTPS site <script src="https://the-cdn.tld/player.js"></script> One option we had was to just download a copy of the JS file and serve it on the HTTPS site, however we have concerns with this as it is not recommended by the provider and will not include updates from them. Assuming we cannot do that, we were thinking a possible other option would be to use a SWF file as a proxy. We were thinking that we could have one of our flash guys create a SWF that loads in the HTTP-served JS file to the page. We were wondering that if this SWF makes the request, would that prevent the browser from showing the security warning or not? I assumed that we would still see the warning since the SWF is still making the request through the browser, but I wanted to see what the hive mind thinks.

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• Help securing files access with htaccess and php?

  - by bschaeffer

  I'm working on a site that allows users to purchase digital content and have implemented a method that attempts to serve secure downloads. I'm using CodeIgniter to force downloads like this: $file = file_get_contents($path); force_download("my_file_name.zip", $file); Of course, I make sure the user has access to the file using a database before serving the download, but I was wondering if there was a way to make these files more secure. I'm using a some 8-10 letter keys to create the file paths so urls to the files aren't exactly easy to figure out... something like http://mysite.com/as67Hgr/asdo0980/uth89.zip in lieu of http://mysite.com/downloads/my_file.zip. Also, I'm using .htaccess to deny directory browsing like so: Options All -Indexes. Other than that... I have no idea what steps to take. I've seen articles suggesting username and password methods using .htaccess, but I don't understand how to bypass the password prompt that would occur using that method. I was hoping there might be a method where I could send a username and password combination using headers and cUrl (or something similar), but I wouldn't know where to start. Any help would be hugely appreciated. Thanks in advance!

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• Moving a ASP.NET application to the cloud

  - by user102533

  I am new to cloud computing, so please bear with me here. I have an existing ASP.NET application with SQL Server 2008 hosted on a Virtual Private Server. Here's what it briefly does: The front end accepts user's requests and adds them to a DB table A Windows Service running in the background picks up the request, processes it and sets a flag. The Windows Services also creates a file for the user to download. User downloads file I'd like to move this web application with the service to the cloud. The architecture I envision is that I'll have 1 Web server in which I will install the front end and the windows service. I'll also have a cloud files server for file storage. The windows service should somehow create a file and transfer it to the cloud file server (I assume this is possible?) My questions: Does the architecture look like I am going in the right direction? I know Amazon has been providing cloud services for a long time. If I want to do minimal changes to my application, should I go with Amazon, Rackspace, Azure or some other provider? I understand that I would not only pay for file storage and web server but also for the bandwidth of users downloading the file and the windows servic uploading the file to the cloud server. Can I assume these costs are negligible? Should I go with VPS + Cloud Files combination to begin with? Any other thoughts/suggestions?

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• How to best show progress info when using ADO.NET?

  - by Yadyn

  I want to show the user detailed progress information when performing potentially lengthy database operations. Specifically, when inserting/updating data that may be on the order of hundreds of KB or MB. Currently, I'm using in-memory DataTables and DataRows which are then synced with the database via TableAdapter.Update calls. This works fine and dandy, but the single call leaves little opportunity to glean any kind of progress info to show to the user. I have no idea how much data is passing through the network to the remote DB or its progress. Basically, all I know is when Update returns and it is assumed complete (barring any errors or exceptions). But this means all I can show is 0% and then a pause and then 100%. I can count the number of rows, even going so far to cound how many are actually Modified or Added, and I could even maybe calculate per DataRow its estimated size based on the datatype of each column, using sizeof for value types like int and checking length for things like strings or byte arrays. With that, I could probably determine, before updating, an estimated total transfer size, but I'm still stuck without any progress info once Update is called on the TableAdapter. Am I stuck just using an indeterminate progress bar or mouse waiting cursor? Would I need to radically change our data access layer to be able to hook into this kind of information? Even if I can't get it down to the precise KB transferred (like a web browser file download progress bar), could I at least know when each DataRow/DataTable finishes or something? How do you best show this kind of progress info using ADO.NET?

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• Repeated properties design pattern

  - by Mark

  I have a DownloadManager class that manages multiple DownloadItem objects. Each DownloadItem has events like ProgressChanged and DownloadCompleted. Usually you want to use the same event handler for all download items, so it's a bit annoying to have to set the event handlers over and over again for each DownloadItem. Thus, I need to decide which pattern to use: Use one DownloadItem as a template and clone it as necessary var dm = DownloadManager(); var di = DownloadItem(); di.ProgressChanged += new DownloadProgressChangedEventHandler(di_ProgressChanged); di.DownloadCompleted += new DownloadProgressChangedEventHandler(di_DownloadCompleted); DownloadItem newDi; newDi = di.Clone(); newDi.Uri = "http://google.com"; dm.Enqueue(newDi); newDi = di.Clone(); newDi.Uri = "http://yahoo.com"; dm.Enqueue(newDi); Set the event handlers on the DownloadManager instead and have it copy the events over to each DownloadItem that is enqeued. var dm = DownloadManager(); dm.ProgressChanged += new DownloadProgressChangedEventHandler(di_ProgressChanged); dm.DownloadCompleted += new DownloadProgressChangedEventHandler(di_DownloadCompleted); dm.Enqueue(new DownloadItem("http://google.com")); dm.Enqueue(new DownloadItem("http://yahoo.com")); Or use some kind of factory var dm = DownloadManager(); var dif = DownloadItemFactory(); dif.ProgressChanged += new DownloadProgressChangedEventHandler(di_ProgressChanged); dif.DownloadCompleted += new DownloadProgressChangedEventHandler(di_DownloadCompleted); dm.Enqueue(dif.Create("http://google.com")); dm.Enqueue(dif.Create("http://yahoo.com")); What would you recommend?

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• Application Installation error Blackberry

  - by tek3

  Hi all, I have an application of mine on AppStore. But one user is complaining that he can not install the application on his device(Curve 8900) and it's giving error "Error starting AppName $28NonTouch$29: Module 'AppName $28NonTouch$29-2' has verification errors." Now how come it is possible that other's users are able to download properly while one user is getting this error. I downloaded the application from the appstore and its working perfectly. And when this user tries to install the application through Desktop Manager he is getting error "No additional applications can be found. Your file may contain applications that already exist in the application list, are not compatible for your device, or have errors." When i tried to stimulate the issue here by installing the application through desktop manager i am able to install it properly without any error messages. Can anyone suggest me ,what might be causing this issue.?? Is there any kind of version mismatch?? My application is compiled usiong jdk 4.5. Any help in this regard will be greatly appreciated. Kindly help,Its urgent.. Thanx in advance."

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• Why can't I create a database in an empty ASP MVC 2 project using Project->Add->New Item->SQL Server

  - by Dr Dork

  I'm diving head first into ASP MVC and am playing around with creating and manipulating a database. I did a search and found this tutorial for creating a database, however when I follow it, I get this error when trying to add a new database to my fresh, empty ASP MVC 2 project... A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) The only requirement the tutorial mentioned was SQL Server Express, but when I went to download it, it said it was already installed. I'm assuming it was part of the VS 2010 RC I installed and am running. So I don't know what else I need if I am missing something. This is all new to me, so I'm sure I'm missing something obvious here and after I'm done posting this question, I plan to do some more research into the topic of databases and how they work with ASP MVC. In the meantime, I was you could help me answer a couple high level questions... What am I missing/forgetting to do that is causing this error? Any suggestions for good resources/tutorials that focus on using databases with ASP MVC? I've done a lot of database programming in the past, so I'm familiar with the concepts of relational databases and the SQL language. I wish I could find a good resource for learning how to work with them in an ASP dev environment, as well as a good breakdown of all the related technologies used for working with them (i.e. LINQ to SQL). Thanks so much in advance for all your help! I'm going to start researching these questions right now.

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