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• SSMS Tools Pack 2.7 is released. New website, improved licensing and features.

  - by Mladen Prajdic

  New website Nice, isn't it? Cleaner, simpler, better looking and more modern. If you have any suggestions for further improvements I'd be glad to hear them. Simpler licensing With SSMS tools Pack 2.7 the licensing is finally where it should be. It is now based on the activate/deactivate model. This way you can move a license from machine to machine with simple deactivation on one and reactivation on another machine. Much better, no? Because of very good feedback I have added an option for 6 machines and lowered the 4 machines option to 3 machines. This should make it much simpler for you to choose the right option for yourself. Improved features Version 2.5.3 was already extremely stable and 2.7 continues with that tradition. Because of that I could fully focus on features and why 3.0 will rock even more that 2.7! ;) In version 2.7 I have addressed quite a few improvements you were requesting for a while now. SQL History This is probably the biggest time saver out there, therefore it's only fair it gets a few important updates. If you have an existing .sql file opened, the Window Content History now saves your code to that existing file and also makes a backup in the SQL History log default location. Search is still done through the SQL History log but the Tab Sessions Restore opens your existing .sql file. This way you don't have to remember to save your existing files by yourself anymore. A bug when you couldn't search properly if you copied the log files to a new location was fixed. Unfortunately this removed the option to filter a search with the time component. The smallest search interval is now one day. The SSMS Tools Pack now remembers the visibility of the Current Window History window when you exit SSMS. SQL Snippets You can now set the position of the cursor in your snippets by placing {C} somewhere in your snippet. It's a small improvement but can be a huge time saver since you don't have to move through the snippet to the desired location anymore. Run script on multiple databases Database choices can now be saved with a name and then loaded again next time. You can also choose to run the script in a new window for each chosen database. Search through grid results You can now go previous/next search result with the Prev/Next control inside the search window. This is extremely useful if you have a large resultset. IT saves you the scrolling. CRUD generator Four new variables have been added: |CurrentDate| writes current date in format yyyy-MM-dd to your script |CurrentTime| writes current time in 24h format HH:mm:ss to your script |CurrentWinUser| writes current Windows logged on user to your script |CurrentSqlUser| writes current SQL logged on login to your script This was actually quite a requested feature so if you have any other ideas for extra variables, do let me know. That's about it. I hope you're going to enjoy this version as much as the previous ones. Have fun!

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• Project Time Tracker

  - by Geertjan

  Based on yesterday's blog entry, let's do something semi useful and display, in the project popup, which is available when you right-click a project in the Projects window, the time since the last change was made anywhere in the project, i.e., we can listen recursively to any changes done within a project and then update the popup with the newly acquired information, dynamically: import java.awt.event.ActionEvent; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Collection; import java.util.List; import javax.swing.AbstractAction; import org.netbeans.api.project.Project; import org.netbeans.api.project.ProjectUtils; import org.openide.awt.ActionID; import org.openide.awt.ActionReference; import org.openide.awt.ActionRegistration; import org.openide.awt.StatusDisplayer; import org.openide.filesystems.FileAttributeEvent; import org.openide.filesystems.FileChangeListener; import org.openide.filesystems.FileEvent; import org.openide.filesystems.FileRenameEvent; import org.openide.util.Lookup; import org.openide.util.LookupEvent; import org.openide.util.LookupListener; import org.openide.util.Utilities; import org.openide.util.WeakListeners; @ActionID( category = "Demo", id = "org.ptt.TrackProjectSelectionAction") @ActionRegistration( lazy = false, displayName = "NOT-USED") @ActionReference( path = "Projects/Actions", position = 0) public final class TrackProjectSelectionAction extends AbstractAction implements LookupListener, FileChangeListener { private Lookup.Result<Project> projects; private Project context; private Long startTime; private Long changedTime; private DateFormat formatter; private List<Project> timedProjects; public TrackProjectSelectionAction() { putValue("popupText", "Timer"); formatter = new SimpleDateFormat("HH:mm:ss"); timedProjects = new ArrayList<Project>(); projects = Utilities.actionsGlobalContext().lookupResult(Project.class); projects.addLookupListener( WeakListeners.create(LookupListener.class, this, projects)); resultChanged(new LookupEvent(projects)); } @Override public void resultChanged(LookupEvent le) { Collection<? extends Project> allProjects = projects.allInstances(); if (allProjects.size() == 1) { Project currentProject = allProjects.iterator().next(); if (!timedProjects.contains(currentProject)) { String currentProjectName = ProjectUtils.getInformation(currentProject).getDisplayName(); putValue("popupText", "Start Timer for Project: " + currentProjectName); StatusDisplayer.getDefault().setStatusText( "Current Project: " + currentProjectName); timedProjects.add(currentProject); context = currentProject; } } } @Override public void actionPerformed(ActionEvent e) { refresh(); } protected void refresh() { startTime = System.currentTimeMillis(); String formattedStartTime = formatter.format(startTime); putValue("popupText", "Timer started: " + formattedStartTime + " (" + ProjectUtils.getInformation(context).getDisplayName() + ")"); } @Override public void fileChanged(FileEvent fe) { changedTime = System.currentTimeMillis(); formatter = new SimpleDateFormat("mm:ss"); String formattedLapse = formatter.format(changedTime - startTime); putValue("popupText", "Time since last change: " + formattedLapse + " (" + ProjectUtils.getInformation(context).getDisplayName() + ")"); startTime = changedTime; } @Override public void fileFolderCreated(FileEvent fe) {} @Override public void fileDataCreated(FileEvent fe) {} @Override public void fileDeleted(FileEvent fe) {} @Override public void fileRenamed(FileRenameEvent fre) {} @Override public void fileAttributeChanged(FileAttributeEvent fae) {} } Some more work needs to be done to complete the above, i.e., for each project you somehow need to maintain the start time and last change and redisplay that whenever the user right-clicks the project.

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• Eclipse Hell . . . Failed to read the project description file (.project)

  - by Kobojunkie

  I think Eclipse is trying to make me miserable. A couple of hours ago, my project was working and compiling well. Suddenly that all changed. Eclipse somehow wipes out all changes I have made to my files(activity, manifest etc.) I make sure to save often but when I go to run the project, I get the error that I have a build error. I checked and there was none, so I go to close Eclipse, so I can reopen and see if the errors will go away. Instead what happens is Eclipse wipes clean all my files and I end up with a project on disk with lots of blank code files. I try to run anyway, and I get the error message below. Failed to read the project description file (.project) for 'com.example.android.nfc.simulator.FakeTagsActivity.FakeTagsActivity'. The file has been changed on disk, and it now contains invalid information. The project will not function properly until the description file is restored to a valid state. Anyone have an idea what in the world this is about and how I can rectify this?

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• Pass a JSON array to a WCF web service

  - by Tawani

  I am trying to pass a JSON array to a WCF service. But it doesn't seem to work. I actually pulled an array [GetStudents] out the service and sent the exact same array back to the service [SaveStudents] and nothing (empty array) was received. The JSON array is of the format: [ {"Name":"John","Age":12}, {"Name":"Jane","Age":11}, {"Name":"Bill","Age":12} ] And the contracts are of the following format: //Contracts [DataContract] public class Student{ [DataMember]public string Name { get; set; } [DataMember]public int Age{ get; set; } } [CollectionDataContract(Namespace = "")] public class Students : List<Student> { [DataMember]public Endorsements() { } [DataMember]public Endorsements(IEnumerable<Student> source) : base(source) { } } //Operations public Students GetStudents() { var result = new Students(); result.Add(new Student(){Name="John",12}); result.Add(new Student(){Name="Jane",11}); result.Add(new Student(){Name="Bill",12}); return result; } //Operations public void SaveStudents(Students list) { Console.WriteLine(list.Count); //It always returns zero } It there a particular way to send an array to a WCF REST service?

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• Caching with AVPlayer and AVAssetExportSession

  - by tba

  I would like to cache progressive-download videos using AVPlayer. How can I save an AVPlayer's item to disk? I'm trying to use AVAssetExportSession on the player's currentItem (which is fully loaded). This code is giving me "AVAssetExportSessionStatusFailed (The operation could not be completed)" : AVAsset *mediaAsset = self.player.currentItem.asset; AVAssetExportSession *es = [[AVAssetExportSession alloc] initWithAsset:mediaAsset presetName:AVAssetExportPresetLowQuality]; NSString *outPath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"out.mp4"]; NSFileManager *fileManager = [NSFileManager defaultManager]; [fileManager removeItemAtPath:outPath error:NULL]; es.outputFileType = @"com.apple.quicktime-movie"; es.outputURL = [[[NSURL alloc] initFileURLWithPath:outPath] autorelease]; NSLog(@"exporting to %@",outPath); [es exportAsynchronouslyWithCompletionHandler:^{ NSString *status = @""; if( es.status == AVAssetExportSessionStatusUnknown ) status = @"AVAssetExportSessionStatusUnknown"; else if( es.status == AVAssetExportSessionStatusWaiting ) status = @"AVAssetExportSessionStatusWaiting"; else if( es.status == AVAssetExportSessionStatusExporting ) status = @"AVAssetExportSessionStatusExporting"; else if( es.status == AVAssetExportSessionStatusCompleted ) status = @"AVAssetExportSessionStatusCompleted"; else if( es.status == AVAssetExportSessionStatusFailed ) status = @"AVAssetExportSessionStatusFailed"; else if( es.status == AVAssetExportSessionStatusCancelled ) status = @"AVAssetExportSessionStatusCancelled"; NSLog(@"done exporting to %@ status %d = %@ (%@)",outPath,es.status, status,[[es error] localizedDescription]); }]; How can I export successfully? I'm looking into copying mediaAsset into an AVMutableComposition, but haven't had much luck with that either. Thanks! PS: Here are some questions from people trying to accomplish the same thing (but with MPMoviePlayerController): Cache Progressive downloaded content in MPMoviePlayerController Simultaneously stream and save a video? Caching videos to disk after successful preload by MPMoviePlayerController

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• How do I get public feed from facebook without user authentication on a native/Desktop app?

  - by KronoS

  I'm looking to get publicly available facebook feeds (i.e. Google's facebook page/posts). However instead of forcing the user to sign into their own facebook app, I want to be able to access these posts. I've looked into using "App Access Tokens" however since my application is a native/Desktop app (iOS, Android, WP8/Win 8) I'm not able to do this. Is there a way to get publicly accessible feeds from facebook without user authentication? I'm using the Facebook C# SDK to access facebook. Currently I'm doing the following: dynamic tokenInfo = fb.Get( String.Format( "/oauth/access_token?client_id={0}&client_secret={1}&grant_type=client_credentials", FbController.AppId, FbController.AppSecret)); var appAccessToken = (string) tokenInfo.access_token; fb = new FacebookClient(); dynamic response = fb.Get( String.Format( "/google/posts?access_token={0}", appAccessToken)); Problem is that this only works if my application is set to "web" instead of "native/Desktop". I get the following error when running this code and classified app as native/Desktop. (OAuthException - #15) (#15) Requires session when calling from a desktop app

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• [ScriptMethod(ResponseFormat = ResponseFormat.Json)]

  - by gnomixa

  In ASP.net web service if the above isn't specified , what is the response format by default? Also, if my web service below: [WebMethod()] public List<Sample> GenerateSamples(string[][] data) { ResultsFactory f = new ResultsFactory(data); List<Sample> samples = f.GenerateSamples(); return samples; } returns the list of objects, If I change the response format to JSON, I have to change the return type to string, then how do I access objects in my javascript? Currently I call this web service in my JS such as: $.ajax({ type: "POST", url: "http://localhost/TemplateWebService/Service.asmx/GenerateSamples", data: jsonText, contentType: "application/json; charset=utf-8", dataType: "json", success: function(response) { var samples = (typeof response.d) == 'string' ? eval('(' + response.d + ')') : response.d; if (samples.length > 0) { doSomethingHere(samples); } else { alert("No samples have been generated"); } }, error: function(xhr, status, error) { var msg = JSON.parse(xhr.responseText); alert(msg.Message); } }); What i noticed though, even though everything works perfectly fine, the eval statement never gets executed, which means that the web service always returns a string! So my question is, is [ScriptMethod(ResponseFormat = ResponseFormat.Json)] necessary on the web service definition side? The way things are now, I can use samples array and access each object and its properties as I normally would in any OOP code, which is very convenient, and everything works no problem, but I just wanted to make sure that I am not missing anything in my set up. I took the basics of combining Jquery's ajax with asp.net from Encosia side, and the response type wasn't mentioned there - I read it on another site and am I not sure how vital it is.

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• Telerik ASP.NET AJAX - Ajax Update Label with dynamic created Docks

  - by csharpnoob

  Hi, i try to Update a simple Label on Close Event of dynamic created RadDock. Works fine so far, Label gets the correct values but doesnt updates it. RadDock dock = new RadDock(); dock.DockMode = DockMode.Docked; dock.UniqueName = Guid.NewGuid().ToString(); dock.ID = string.Format("RadDock{0}", dock.UniqueName); dock.Title = slide.slideName; dock.Text = string.Format("Added at {0}", DateTime.Now); dock.Width = Unit.Pixel(300); dock.AutoPostBack = true; dock.CommandsAutoPostBack = true; dock.Command += new DockCommandEventHandler(dock_Command); ... void dock_Command(object sender, DockCommandEventArgs e) { Status.Text = "Removed " + ((RadDock)sender).Title + " " + ((RadDock)sender).Text; } I tried to do this: RadAjaxManager1.AjaxSettings.AddAjaxSetting(dock, Status, null); while creating the docks, but on runtime i get a NullReference Excepetion. On a Button registered with the RadAjaxManager it works to show the value assigned by dock_command. protected void Button1_Click(object sender, EventArgs e) { Status.Text = Status.Text; } UPDATE: The RadAjaxManager was created with integrated Wizzard of VS2008. Can't select the Docks, because the are generated while runtime. On Backend its included in AutoCompletion, so the NullReference has nothing to do with the AjaxManager itself. Like i said, works fine with the Button. <telerik:RadAjaxManager ID="RadAjaxManager1"> <telerik:AjaxSetting AjaxControlID="Button1"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="Label1"></telerik:AjaxUpdatedControl> </UpdatedControls> </telerik:AjaxSetting>

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• Hidden Features of C#?

  - by Serhat Özgel

  This came to my mind after I learned the following from this question: where T : struct We, C# developers, all know the basics of C#. I mean declarations, conditionals, loops, operators, etc. Some of us even mastered the stuff like Generics, anonymous types, lambdas, linq, ... But what are the most hidden features or tricks of C# that even C# fans, addicts, experts barely know? Here are the revealed features so far: Keywords yield by Michael Stum var by Michael Stum using() statement by kokos readonly by kokos as by Mike Stone as / is by Ed Swangren as / is (improved) by Rocketpants default by deathofrats global:: by pzycoman using() blocks by AlexCuse volatile by Jakub Šturc extern alias by Jakub Šturc Attributes DefaultValueAttribute by Michael Stum ObsoleteAttribute by DannySmurf DebuggerDisplayAttribute by Stu DebuggerBrowsable and DebuggerStepThrough by bdukes ThreadStaticAttribute by marxidad FlagsAttribute by Martin Clarke ConditionalAttribute by AndrewBurns Syntax ?? operator by kokos number flaggings by Nick Berardi where T:new by Lars Mæhlum implicit generics by Keith one-parameter lambdas by Keith auto properties by Keith namespace aliases by Keith verbatim string literals with @ by Patrick enum values by lfoust @variablenames by marxidad event operators by marxidad format string brackets by Portman property accessor accessibility modifiers by xanadont ternary operator (?:) by JasonS checked and unchecked operators by Binoj Antony implicit and explicit operators by Flory Language Features Nullable types by Brad Barker Currying by Brian Leahy anonymous types by Keith __makeref __reftype __refvalue by Judah Himango object initializers by lomaxx format strings by David in Dakota Extension Methods by marxidad partial methods by Jon Erickson preprocessor directives by John Asbeck DEBUG pre-processor directive by Robert Durgin operator overloading by SefBkn type inferrence by chakrit boolean operators taken to next level by Rob Gough pass value-type variable as interface without boxing by Roman Boiko programmatically determine declared variable type by Roman Boiko Static Constructors by Chris Easier-on-the-eyes / condensed ORM-mapping using LINQ by roosteronacid Visual Studio Features select block of text in editor by Himadri snippets by DannySmurf Framework TransactionScope by KiwiBastard DependantTransaction by KiwiBastard Nullable<T> by IainMH Mutex by Diago System.IO.Path by ageektrapped WeakReference by Juan Manuel Methods and Properties String.IsNullOrEmpty() method by KiwiBastard List.ForEach() method by KiwiBastard BeginInvoke(), EndInvoke() methods by Will Dean Nullable<T>.HasValue and Nullable<T>.Value properties by Rismo GetValueOrDefault method by John Sheehan Tips & Tricks nice method for event handlers by Andreas H.R. Nilsson uppercase comparisons by John access anonymous types without reflection by dp a quick way to lazily instantiate collection properties by Will JavaScript-like anonymous inline-functions by roosteronacid Other netmodules by kokos LINQBridge by Duncan Smart Parallel Extensions by Joel Coehoorn

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• Using oauth2_access_token to get connections in linkedIn

  - by Pedro

  I'm trying to get the connections in linkedIn using their API, but when I try to retrieve the connections I get a 401 unauthorized error. in the official documentation says You must use an access token to make an authenticated call on behalf of a user Make the API calls You can now use this access_token to make API calls on behalf of this user by appending "oauth2_access_token=access_token" at the end of the API call that you wish to make. The API call that I'm trying to do is the following Error -- http://api.linkedin.com/v1/people/~/connections:(id,headline,first-name,last-name)?format=json&oauth2_access_token=access_token I have tried to do it with the following endpoint without any problems. OK -- https://api.linkedin.com/v1/people/~:(id,first-name,last-name,formatted-name,date-of-birth,industry,email-address,location,headline,picture-urls::(original))?format=json&oauth2_access_token=access_token this list of endpoints for the connections API are described here http://developer.linkedin.com/documents/connections-api I just copied and pasted one endpoint from there, so the question is what's the problem with the endpoint for getting the connections? what am I missing? EDIT: for the preAuth Url I'm using https://www.linkedin.com/uas/oauth2/authorization?response_type=code&client_id=ConsumerKey&scope=r_fullprofile%20r_emailaddress%20r_network&state&state=NewGuid&redirect_uri=Encoded_Url https://www.linkedin.com/uas/oauth2/accessToken?grant_type=authorization_code&code=QueryString_Code&redirect_uri=EncodedCallback&client_id=ConsummerKey&client_secret=ConsumerSecret please find attached the login screen requesting the permissions EDIT2: Switched to https and worked like a charm!

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• Deserialization error using Runtime Serialization with the Binary Formatter

  - by Lily

  When I am deserializing a hierarchy I get the following error The input stream is not a valid binary format. The starting contents (in bytes) are The input stream is not a valid binary format. The starting contents (in bytes) are: 20-01-20-20-20-FF-FF-FF-FF-01-20-20-20-20-20-20-20 ..." Any help please? Extra info: public void Serialize(ISyntacticNode person) { Stream stream = File.Open(fileName, FileMode.OpenOrCreate); try { BinaryFormatter binary = new BinaryFormatter(); pList.Add(person); binary.Serialize(stream, pList); stream.Close(); } catch { stream.Close(); } } public List<ISyntacticNode> Deserialize() { Stream stream = File.Open(fileName, FileMode.OpenOrCreate); BinaryFormatter binary = new BinaryFormatter(); try { pList = (List<ISyntacticNode>)binary.Deserialize(stream); binary.Serialize(stream, pList); stream.Close(); } catch { pList = new List<ISyntacticNode>(); binary.Serialize(stream, pList); stream.Close(); } return pList; } I am Serializing a hierarchy which is of type Proxem.Antelope.Parsing.ISyntacticNode Now I have gotten this error System.Runtime.Serialization.SerializationException: Binary stream '116' does not contain a valid BinaryHeader. Possible causes are invalid stream or object version change between serialization and deserialization. i'm using a different instance. How may I avoid this error please

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• Inserting Google Maps into a WYSIWYG editor, then saving and retrieving properly

  - by Tatu Ulmanen

  Hi, I'm trying to extend jWysiwyg with an function to add a map from Google Maps. I can get the map all right, but I'm having problems with how to handle the generated map so it can be saved with the page and then retrieved. To open the process up a bit: User enters editor which is created using jWysiwyg. User clicks on a button which asks for an address, then returns the corresponding latitude and longitude. I use this location information to create a map using Google Maps API (V3), which I then insert into the editable WYSIWYG area. When I save the page, the whole Google generated HTML gets saved into the database, which will not work properly when opened next time (I get a grey box when I open up the page again). Now, the problem is that I need to insert the map in such a format that it will work afterwards (perhaps using <script> tags). I also need the map to be visible in the WYSIWYG editor itself, so I cannot just put in a placeholder tag which would later be populated with the correct map data. So, in short; how would you insert a Google Map into a WYSIWYG editor in a way that it is both visible/previewable from the editor itself and could also be saved in a format that would work properly when opened the next time?

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• Using pinvoke in c# to call sprintf and friends on 64-bit

  - by bde

  I am having an interesting problem with using pinvoke in C# to call _snwprintf. It works for integer types, but not for floating point numbers. This is on 64-bit Windows, it works fine on 32-bit. My code is below, please keep in mind that this is a contrived example to show the behavior I am seeing. class Program { [DllImport("msvcrt.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)] private static extern int _snwprintf([MarshalAs(UnmanagedType.LPWStr)] StringBuilder str, uint length, String format, int p); [DllImport("msvcrt.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)] private static extern int _snwprintf([MarshalAs(UnmanagedType.LPWStr)] StringBuilder str, uint length, String format, double p); static void Main(string[] args) { Double d = 1.0f; Int32 i = 1; Object o = (object)d; StringBuilder str = new StringBuilder(); _snwprintf(str, 32, "%10.1f", (Double)o); Console.WriteLine(str.ToString()); o = (object)i; _snwprintf(str, 32, "%10d", (Int32)o); Console.WriteLine(str.ToString()); Console.ReadKey(); } } The output of this program is 0.0 1 It should print 1.0 on the first line and not 0.0, and so far I am stumped.

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• How to get Processor and Motherboard Id ?

  - by Frank

  I use the code from http://www.rgagnon.com/javadetails/java-0580.html to get Motherboard Id, but the result is "null", <1 How can that be ? <2 Also I modified the code a bit to look like this to get processor Id : "Set objWMIService = GetObject(\"winmgmts:\\\\.\\root\\cimv2\")\n"+ "Set colItems = objWMIService.ExecQuery _ \n"+ " (\"Select * from Win32_Processor\") \n"+ "For Each objItem in colItems \n"+ " Wscript.Echo objItem.ProcessorId \n"+ " exit for ' do the first cpu only! \n"+ "Next \n"; The result is something like : ProcessorId = BFEBFBFF00010676 On http://msdn.microsoft.com/en-us/library/aa389273%28VS.85%29.aspx it says : ProcessorId : Processor information that describes the processor features. For an x86 class CPU, the field format depends on the processor support of the CPUID instruction. If the instruction is supported, the property contains 2 (two) DWORD formatted values. The first is an offset of 08h-0Bh, which is the EAX value that a CPUID instruction returns with input EAX set to 1. The second is an offset of 0Ch-0Fh, which is the EDX value that the instruction returns. Only the first two bytes of the property are significant and contain the contents of the DX register at CPU reset—all others are set to 0 (zero), and the contents are in DWORD format. I don't quite understand it, in plain English, is it unique or just a number for this class of processors, for instance all Intel Core2 Duo P8400 will have this number ? Frank

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• How To Create Your Own x86 Operating System for Modern PC Computers

  - by mudge

  I'd like to create a new operating system for x86 PC computers. I'd like it to be 64-bit but possibly run as 32-bit as well. I have these kinds of questions: What kinds of things do you start working on first? Knowing where to start in writing your own operating system seems to me to be a tricky subject, so I am interested in your input. Generally how to go about making your own 32-bit/64-bit operating system, or good resources that mention useful information about going about writing your own operating system for x86 computers. I don't care how old sources are as long as they are still relevant and useful to what I am doing. I know that I will want it to have kernel drivers that access peripheral hardware directly. Where should I look for advice and documentation for programming and understanding the interface to peripheral hardware the operating system will communicate with? I will need to understand how the operating system will receive input and interact with keyboards, mice, computer monitors, hard drives, USB, etc. etc. This is probably the area I know least about. I have the Intel instruction set manuals and have been getting more familiar with assembly programming, so the CPU side of things is what I know the most about. At this point I'm thinking that I'd like to implement the Linux system calls within my operating system so that programs that run on Linux can run on my operating system. I want my operating system to use the ELF binary format. I wonder what obstacles I have to overcome to achieve this Linux compatibility. Are the main things implementing the system calls that Linux provides, and using the ELF format? What else? I am also interested in people's thoughts about why it might not be a good idea to make your own operating system, and why it is a good idea to make your own operating system. Thank you for any input.

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• Android SQLite database gets corrupted

  - by Seu

  There are about 100 people using my Android App right now and every once and while I get a crash report to the server with this stack trace: android.database.sqlite.SQLiteDatabaseCorruptException: database disk image is malformed at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621) at android.app.ActivityThread.access$2200(ActivityThread.java:126) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1932) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:4595) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:521) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) at dalvik.system.NativeStart.main(Native Method) Caused by: android.database.sqlite.SQLiteDatabaseCorruptException: database disk image is malformed at android.database.sqlite.SQLiteQuery.native_fill_window(Native Method) at android.database.sqlite.SQLiteQuery.fillWindow(SQLiteQuery.java:75) at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:295) at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:276) at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:171) at android.database.AbstractCursor.moveToFirst(AbstractCursor.java:248) The result is the app crashing and all the data in the DB being lost. One thing to note is that every time I read or write to the database I get a new SQLiteDatabase and close it as soon as I'm done. I thought this would simplify things, but perhaps that's causing the problem? Is it possible this is just a SQLite bug?

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• Posting a JSON array to webservice in Android

  - by Sam

  I am having some problems with what should be a rather simple task. I simply need a JSON array with a single JSON object within it to be posted to my webservice. The entire URL request needs to be formatted like this: http://www.myserver.com/myservice.php?location_data=[{"key1":"val1","key2":"val2"....}] I cannot for the life of me figure out how to append the 'location_data' bit using HttpPost. Here is a code snippet to demonstrate the HTTP connection method I am using: HttpClient hClient = new DefaultHttpClient(); HttpPost hPost = new HttpPost(url); try { hPost.setEntity(new StringEntity(string)); hPost.setHeader("Accept", "application/json"); hPost.setHeader("Content-type", "application/json"); //execute request HttpResponse response = (HttpResponse) hClient.execute(hPost); HttpEntity entity = response.getEntity(); I don't have any syntax errors, and my code is accessing the server fine, just not in the exact format the server needs. Any help on how to format my request to look like how I need it would be greatly appreciated!

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• Handling multiple column data with Java

  - by Ender

  I am writing an application that reads in a large number of basic user details in the following format; once read in it then allows the user to search for a user's details using their email: NAME ROLE EMAIL --------------------------------------------------- Joe Bloggs Manager [email protected] John Smith Consultant [email protected] Alan Wright Tester [email protected] ... The problem I am suffering is that I need to store a large number of details of all people that have worked at the company. The file containing these details will be written on a yearly basis simply for reporting purposes, but the program will need to be able to access these details quickly. The way I aim to access these files is to have a program that asks the user for the name of the unique email of the member of staff and for the program to then return the name and the role from that line of the file. I've played around with text files, but am struggling with how I would handle multiple columns of data when it comes to searching this large file. What is the best format to store such data in? A text file? XML? The size doesn't bother me, but I'd like to be able to search it as quickly as possible. The file will need to contain a lot of entries, probably over the 10K mark over time.

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• Integration test failing through NUnit Gui/Console, but passes through TestDriven in IDE

  - by Cliff

  I am using NHibernate against an Oracle database with the NHibernate.Driver.OracleDataClientDriver driver class. I have an integration test that pulls back expected data properly when executed through the IDE using TestDriven.net. However, when I run the unit test through the NUnit GUI or Console, NHibernate throws an exception saying it cannot find the Oracle.DataAccess assembly. Obviously, this prevents me from running my integration tests as part of my CI process. NHibernate.HibernateException : The IDbCommand and IDbConnection implementation in the assembly Oracle.DataAccess could not be found. Ensure that the assembly Oracle.DataAccess is located in the application directory or in the Global Assembly Cache. If the assembly is in the GAC, use element in the application configuration file to specify the full name of the assembly.* I have tried making the assembly available in two ways, by copying it into the bin\debug folder and by adding the element in the config file. Again, both methods work when executing through TestDriven in the IDE. Neither work when executing through NUnit GUI/Console. The NUnit Gui log displays the following message. 21:42:26,377 ERROR [TestRunnerThread] ReflectHelper [(null)]- Could not load type Oracle.DataAccess.Client.OracleConnection, Oracle.DataAccess. System.BadImageFormatException: Could not load file or assembly 'Oracle.DataAccess, Version=2.111.7.20, Culture=neutral, PublicKeyToken=89b483f429c47342' or one of its dependencies. An attempt was made to load a program with an incorrect format. File name: 'Oracle.DataAccess, Version=2.111.7.20, Culture=neutral, PublicKeyToken=89b483f429c47342' --- System.BadImageFormatException: Could not load file or assembly 'Oracle.DataAccess' or one of its dependencies. An attempt was made to load a program with an incorrect format. File name: 'Oracle.DataAccess' I am running NUnit 2.4.8, TestDriven.net 2.24 and VS2008sp1 on Windows 7 64bit. Oracle Data Provider v2.111.7.20, NHibernate v2.1.0.4. Has anyone run into this issue, better yet, fixed it?

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• Capturing unhandled exceptions in .Net 2.0. Wrong event called.

  - by SoMoS

  Hello, I'm investigating a bit about how the unhandled exceptions are managed in .Net and I'm getting unexpected results that I would like to share with you to see what do you think about. The first one is pretty simple to see. I wrote this code to do the test, just a button that throws an Exception on the same thread that created the Form: Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Throw New Exception() End Sub Private Sub UnhandledException(ByVal sender As Object, ByVal e As UnhandledExceptionEventArgs) MsgBox(String.Format("Exception: {0}. Ending: {1}. AppDomain: {2}", CType(e.ExceptionObject, Exception).Message, e.IsTerminating.ToString(), AppDomain.CurrentDomain.FriendlyName)) End Sub Private Sub UnhandledThreadException(ByVal sender As Object, ByVal e As System.Threading.ThreadExceptionEventArgs) MsgBox(String.Format("Exception: {0}. AppDomain: {1}", e.Exception.Message(), AppDomain.CurrentDomain.FriendlyName)) End Sub Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load AddHandler AppDomain.CurrentDomain.UnhandledException, AddressOf UnhandledException AddHandler Application.ThreadException, AddressOf UnhandledThreadException End Sub End Class When I execute the code inside the Visual Studio the UnhandledException is called as expected but when I execute the application from Windows the UndhanledThreadException is called instead. ¿?¿?¿¿?¿? Someone has any idea of what can be happening here? Thanks in advance.

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• When programatically creating a new IIS web site, how can I add it to an existing application pool?

  - by Ian Robinson

  I have successfully automated the process of creating a new IIS website, however the code I've written doesn't care about application pools, it just gets added to DefaultAppPool. However I'd like to add this newly created site to an existing application pool. Here is the code I'm using to create the new website. var w3Svc = new DirectoryEntry(string.Format("IIS://{0}/w3svc", webserver)); var newsite = new object[] { serverComment, new object[] { serverBindings }, homeDirectory }; var websiteId = w3Svc.Invoke("CreateNewSite", newsite); site.Invoke("Start", null); site.CommitChanges(); <update Although this is not directly related to the question, here are some sample values being used above. This might help someone understand exactly what the code above is doing more easily. webServer: "localhost" serverComment: "testing.dev" serverBindings: ":80:testing.dev" homeDirectory: "c:\inetpub\wwwroot\testing\" </update If I know the name of the application pool that I'd like this web site to be in, how can I find it and add this site to it? <update 2 I've added the following based on Mark's answer below. var appPool = new DirectoryEntry(string.Format("IIS://{0}/w3svc/AppPools/{1}", webServer, appPoolName)); site.Properties["AppPoolId"].Value = appPool; I seem to have moved passed the "RPC" error message I was initially receiving. Now this is the error message I'm receiving: Error: System.Runtime.InteropServices.COMException (0x8000500C): Exception from HRESULT: 0x8000500C at System.DirectoryServices.Interop.UnsafeNativeMethods.IAds.PutEx(Int32 lnControlCode, String bstrName, Object vProp) at System.DirectoryServices.PropertyValueCollection.set_Value(Object value) at ProvisionIISWebsite.Query.CreateWebsite(String webServer, String serverComment, String serverBindings, String homeDirectory, String appPoolName) in C:\Users\irobinson\My Projects\ProvisionIISWebsite\Query.cs:line 104 at ProvisionIISWebsite.Query.Handle_GetData(EngineBase& caller, Boolean isSubQuery, String query, String filterField, String filterText, Debugger& debugWriter, Boolean isRendered, Int32 timeout, String customConnection) in C:\Users\irobinson\My Projects\ProvisionIISWebsite\Query.cs:line 36 </update 2

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• Code Golf: 1x1 black pixel

  - by Joey Adams

  Recently, I used my favorite image editor to make a 1x1 black pixel (which can come in handy when you want to draw solid boxes in HTML cheaply). Even though I made it a monochrome PNG, it came out to be 120 bytes! I mean, that's kind of steep. 120 bytes. For one pixel. I then converted it to a GIF, which dropped the size down to 43 bytes. Much better, but still... Challenge The shortest image file or program that is or generates a 1x1 black pixel. A submission may be: An image file that represents a 1x1 black pixel. The format chosen must be able to represent larger images than 1x1, and cannot be ad-hoc (that is, it can't be an image format you just made up for code golf). Image files will be ranked by byte count. A program that generates such an image file. Programs will be ranked by character count, as usual in code golf. As long as an answer falls into one of these two categories, anything is fair game.

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• WCF Service : WSHttpBinding

  - by jitm

  Hello, I've created the test self-hosted wcf application and tried to add support https. Code of server application is: using System; using System.Security.Cryptography.X509Certificates; using System.ServiceModel; using System.ServiceModel.Description; using System.ServiceModel.Security; namespace SelfHost { class Program { static void Main(string[] args) { string addressHttp = String.Format("http://{0}:8002/hello", System.Net.Dns.GetHostEntry("").HostName); Uri baseAddress = new Uri(addressHttp); WSHttpBinding b = new WSHttpBinding(); b.Security.Mode = SecurityMode.Transport; b.Security.Transport.ClientCredentialType = HttpClientCredentialType.Certificate; Uri a = new Uri(addressHttp); Uri[] baseAddresses = new Uri[] { a }; ServiceHost sh = new ServiceHost(typeof(HelloWorldService), baseAddresses); Type c = typeof(IHelloWorldService); sh.AddServiceEndpoint(c, b, "hello"); sh.Credentials.ServiceCertificate.SetCertificate( StoreLocation.LocalMachine, StoreName.My, X509FindType.FindBySubjectName,"myCert"); sh.Credentials.ClientCertificate.Authentication.CertificateValidationMode = X509CertificateValidationMode.PeerOrChainTrust; try { sh.Open(); string address = sh.Description.Endpoints[0].ListenUri.AbsoluteUri; Console.WriteLine("Listening @ {0}", address); Console.WriteLine("Press enter to close the service"); Console.ReadLine(); sh.Close(); } catch (CommunicationException ce) { Console.WriteLine("A commmunication error occurred: {0}", ce.Message); Console.WriteLine(); } catch (System.Exception exc) { Console.WriteLine("An unforseen error occurred: {0}", exc.Message); Console.ReadLine(); } } } [ServiceContract] public interface IHelloWorldService { [OperationContract] string SayHello(string name); } public class HelloWorldService : IHelloWorldService { public string SayHello(string name) { return string.Format("Hello, {0}", name); } } } What name(address) should I out into line sh.AddServiceEndpoint(c, b, "hello"); because "hello" is incorrect ? Thanks.

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• Problem with boost::find_format_all, boost::regex_finder and custom regex formatter (bug boost 1.42)

  - by Nikko

  I have a code that has been working for almost 4 years (since boost 1.33) and today I went from boost 1.36 to boost 1.42 and now I have a problem. I'm calling a custom formatter on a string to format parts of the string that match a REGEX. For instance, a string like: "abc;def:" will be changed to "abc\2Cdef\3B" if the REGEX contains "([;:])" boost::find_format_all( mystring, boost::regex_finder( REGEX ), custom_formatter() ); The custom formatter looks like this: struct custom_formatter() { template< typename T > std::string operator()( const T & s ) const { std::string matchStr = s.match_results().str(1); // perform substitutions return matchStr; } } This worked fine but with boost 1.42 I know have "non initialized" s.match_results() which yield to boost::exception_detail::clone_implINS0_::error_info_injectorISt11logic_errorEEEE - Attempt to access an uninitialzed boost::match_results< class. This means that sometimes I am in the functor to format a string but there is no match. Am I doing something wrong? Or is it normal to enter the functor when there is no match and I should check against something? for now my solution is to try{}catch(){} the exception and everything works fine, but somehow that doesn't feel very good. EDIT1 Actually I have a new empty match at the end of each string to parse. EDIT2 : one solution inspired by ablaeul template< typename T > std::string operator()( const T & s ) const { if( s.begin() == s.end() ) return std::string(); std::string matchStr = s.match_results().str(1); // perform substitutions return matchStr; } *EDIT3 Seems to be a bug in (at least) boost 1.42 *

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• understanding func<T, TResult> C#

  - by Satish Raj

  Hi I am trying to refactor some of my code to use Func I have created a sample to try to understand how it works but I am getting compilation error. In the e.g. below when I am trying to access the parameter attributes or return the return value the compiler complain. Clarifications please. using System; namespace chsarp { class Program { static void Main(string[] args) { ParamInput input = new ParamInput(); input.ReservationID = 10; Test testMethod = new Test(); Func<ParamInput, ReservationResult> methodToInvoke = testMethod.GetStatus; ReservationResult result = TestFn(methodToInvoke, input); } static Result TestFn<Param, Result>(Func<Param, Result> methodToInvoke, Param parameter) where Result : new() { Result result = new Result(); try { result = methodToInvoke(parameter); } catch (Exception exception) { result.status = string.Format("Error-{0} during reserving {1}", parameter.ReservationID, exception.Message); } return result; } } class Test { public ReservationResult GetStatus(ParamInput msg) { ReservationResult result = new ReservationResult(); result.status = string.Format("The ReservationID-{0}", msg.ReservationID); return result; } } class ParamInput { public int ReservationID { get; set; } } class ReservationResult { public string status { get; set; } } }

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