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  • SQLite.Net Issue With BeginTransaction

    - by cam
    I'm trying to use System.Data.Sqlite library, and I'm following the documentation about optimizing inserts so I copied this code directly out of the documentation: using (SQLiteTransaction mytransaction = myconnection.BeginTransaction()) { using (SQLiteCommand mycommand = new SQLiteCommand(myconnection)) { SQLiteParameter myparam = new SQLiteParameter(); int n; mycommand.CommandText = "INSERT INTO [MyTable] ([MyId]) VALUES(?)"; mycommand.Parameters.Add(myparam); for (n = 0; n < 100000; n ++) { myparam.Value = n + 1; mycommand.ExecuteNonQuery(); } } mytransaction.Commit(); } Now, I initialize I connection right before that by using SqlConnection myconnection = new SqlConnection("Data Source=blah"); I have a Database named blah, with the correct tables and values. The problem is when I run this code, it says "Operation is not valid due to the current state of the object" I've tried changing the code around several times, and it still points to BeginTransaction. What gives?

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  • SVN Mac oSX issue - permissions?

    - by Steve Griff
    Hello there, /Volumes/sites is a connection to a samba share that hosts some of our sites. We authorise using a username & password that is the same user/pass to log onto the mac. When committing, (or even doing a cleanup) from the Mac Client side using the svn command line tool or SCPlugin, this error occurs: Commit succeeded, but other errors follow: Error bumping revisions post-commit (details follow): In directory '/Volumes/sites/foobar/public_html' Error processing command 'committed' in '/Volumes/sites/foobar/public_html' Error replacing text-base of 'index.php' Can't move '/Volumes/sites/foobar/public_html/.svn/tmp/text-base/index.php.svn-base' to '/Volumes/sites/foobar/public_html/.svn/text-base/index.php.svn-base': Operation not permitted Any ideas? I think it's to do with permissions on the mac side not being able to move files around on the samba share. Apologies if my question is kinda vague so any extra information I can give please shout. Regards Steve

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  • UndeclaredThrowableException due to SQLException in Spring + iBatis?

    - by jr
    Hello, I am getting the following exception when I typo the SQL driver name or the database server is offline, basically any SQLException. I can't determine where the UndeclaredThrowableException is coming from. Line 194 in SqlMapClientTemplate is this: logger.debug("Obtained JDBC Connection [" + springCon + "] for iBATIS operation"); Here is the trace: java.lang.reflect.UndeclaredThrowableException $Proxy59.toString(Unknown Source) java.lang.String.valueOf(Unknown Source) java.lang.StringBuffer.append(Unknown Source) org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:194) org.springframework.orm.ibatis.SqlMapClientTemplate.executeWithListResult(SqlMapClientTemplate.java:249) org.springframework.orm.ibatis.SqlMapClientTemplate.queryForList(SqlMapClientTemplate.java:296) org.springframework.orm.ibatis.SqlMapClientTemplate.queryForList(SqlMapClientTemplate.java:290) some of my reading points to some type of class loading problem? I can't figure out where the $Proxy is getting introduced?

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  • using performSelector

    - by zebra
    Hi all, i've my method that implement a reverseGeocoder - (void)reversing { geoCoder=[[MKReverseGeocoder alloc] initWithCoordinate:locManager.location.coordinate]; geoCoder.delegate=self; [geoCoder start]; } i recall reversing in another method with this: [self performSelector:@selector(reversing) withObject:nil afterDelay:10]; and i receive 2010-04-30 17:44:17.616 high[1167:207] Retrive City Milano 2010-04-30 17:44:17.628 high[1167:207] geocoder released 2010-04-30 17:44:18.723 high[1167:207] Error Domain=MKErrorDomain Code=4 "Operation could not be completed. (MKErrorDomain error 4.)" Program received signal: “EXC_BAD_ACCESS”. Can someone help me? :D

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  • What are the essential COM componenets required for burning DVD in c#.net in Windows XP?

    - by shruti
    im trying to burn DVD/CD through frontend C#.net code... i have used IMAPI2 for buring CD/DVD in windows XP..but it is giving me unhandeled exception... as:- System.InvalidCastException: Unable to cast COM object of type 'IMAPI2.Interop.MsftFileSystemImageClass' to interface type 'IMAPI2.Interop.MsftFileSystemImage'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{7CFF842C-7E97-4807-8304-910DD8F7C051}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)) can anyone plz help me out to solve this pbm...im not able to solve this error.. this project is working fine in Windows7 but unable to work with XP...???

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  • iPhone+Quartz+OpenGL. What is the correct way for Quartz and OpenGL to play nice together regarding

    - by dugla
    So we know the CoreGraphics/Quartz imaging model is based on pre-multiplied alpha. We also know that OpenGL blending is based on un-premultiplied alpha. What is the best practice to avoid head explosion when doing blending with textures that are derived from pre-multiplied alpha imagery (PNG files generated in Photoshop with pre-multiplied alpha). Given the apples/oranges mish mash of Quartz and OpenGL, what is the correct glBlendFunc for doing the fundamental Porter/Duff "over" operation? Typical example: A simple paint program. Brush shapes are texture-map patterns created from pre-multiplied alpha rgba images. Paint color is specified via glColor4(...) with the alpha channel used to control paint transparency. GL_MODULATE is used so the brush texture multiplies the (translucent) paint color to blend the color into the canvas. Problem: The texture is premult. The color is not. What is the correct way to handle this fundamental inconsistency? Thanks, Doug

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  • Why can't set cast an object from Excel interop?

    - by AngryHacker
    Trying to get a reference to the worksheets (using Excel interop): Excel.Application xl = new Excel.ApplicationClass(); Excel.Workbooks xlWorkBooks = xl.Workbooks; Excel.Workbook xlWorkBook = xlWorkBooks.Open(fileName, 0, false, 5, "", "", true, Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0); Excel.Worksheets xlWorkSheets = (Excel.Worksheets) xlWorkBook.Worksheets; // crashes The error is that it cannot cast it: Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Office.Interop.Excel.Worksheets'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208B1-0000-0000-C000-000000000046}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)). Is my cast incorrect?

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  • Data Integration/EAI Project Lessons Learned

    - by Greg Harman
    Have you worked on a significant data or application integration project? I'm interested in hearing what worked for you and what didn't and how that affected the project both during and after implementation (i.e. during ongoing operation, maintenance and expansion). In addition to these lessons learned, please describe the project by including a quick overview of: The data sources and targets. Specifics are not necessary, but I'd like to know general technology categories e.g. RDBMS table, application accessed via a proprietary socket protocol, web service, reporting tool. The overall architecture of the project as related to data flows. Different human roles in the project (was this all done by one engineer? Did it include analysts with a particular expertise?) Any third-party products utilized, commercial or open source.

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  • How to determine if an event is already subscribed

    - by Ram
    Hi, In my .NET application I am subscribing to events from another class. The subscription is conditional. I am subscribing to events when the control is visible and de-subscribing it when it become invisible. However in some conditions I do not want to de-subscribe the event even if the control is not visible as I want the result of an operation which is happening on background thread . Is there any way through which I can determine if a that class has already subscribed to that event. I know we can do it in the class which will raise that event by checking event with null but I don not know how to do it in a class which will subscribe to that event.

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  • Asynchronous Processing in JBoss 6 ("Comet")

    - by chris_l
    edit: Retagged as tomcat, since this is really a question about the Tomcat embedded inside JBoss 6, rather than JBoss itself I have an extremely simple servlet, which works on Glassfish v3. It uses Servlet 3.0 Asynchronous Processing. Here's a simplified version (which doesn't do much): @WebServlet(asyncSupported=true) public class SimpleServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { final AsyncContext ac = request.startAsync(); ac.setTimeout(3000); } } On JBoss 6.0.0 (Milestone 2), I get the following Exception: java.lang.IllegalStateException: The servlet or filters that are being used by this request do not support async operation at org.apache.catalina.connector.Request.startAsync(Request.java:3096) at org.apache.catalina.connector.Request.startAsync(Request.java:3090) at org.apache.catalina.connector.RequestFacade.startAsync(RequestFacade.java:990) at playcomet.SimpleServlet.doGet(SimpleServlet.java:18) at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) ... Do I have to do anything special to enable Asynchronous Processing in JBoss 6? Or do I need an additional deployment descriptor? ...

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  • Should I commit or rollback a transaction that creates a temp table, reads, then deletes it?

    - by Triynko
    To select information related to a list of hundreds of IDs... rather than make a huge select statement, I create temp table, insert the ids into it, join it with a table to select the rows matching the IDs, then delete the temp table. So this is essentially a read operation, with no permanent changes made to any persistent database tables. I do this in a transaction, to ensure the temp table is deleted when I'm finished. My question is... what happens when I commit such a transaction vs. let it roll it back? Performance-wise... does the DB engine have to do more work to roll back the transaction vs committing it? Is there even a difference since the only modifications are done to a temp table? Related question here, but doesn't answer my specific case involving temp tables: http://stackoverflow.com/questions/309834/should-i-commit-or-rollback-a-read-transaction

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  • Why release the NSURLConnection instance in this statement?

    - by aquaibm
    I read this in a book. -(IBAction) updateTweets { tweetsView.text = @""; [tweetsData release]; tweetsData = [[NSMutableData alloc] init]; NSURL *url = [NSURL URLWithString:@"http://twitter.com/statuses/public_timeline.xml" ]; NSURLRequest *request = [[NSURLRequest alloc] initWithURL: url]; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self]; [connection release]; [request release]; [activityIndicator startAnimating]; } In this statement,is that correct to release the "connection" instance at that time? After releasing it which means this NSURLConnection instance will be destroyed since it's reference count is 0 ,how are we going to make this connection operation work? THANKS.

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  • What causes this retainAll exception?

    - by Joren
    java.lang.UnsupportedOperationException: This operation is not supported on Query Results at org.datanucleus.store.query.AbstractQueryResult.contains(AbstractQueryResult.java:250) at java.util.AbstractCollection.retainAll(AbstractCollection.java:369) at namespace.MyServlet.doGet(MyServlet.java:101) I'm attempting to take one list I retrieved from a datastore query, and keep only the results which are also in a list I retrieved from a list of keys. Both my lists are populated as expected, but I can't seem to user retainAll on either one of them. // List<Data> listOne = new ArrayList(query.execute(theQuery)); // DatastoreService ds = DatastoreServiceFactory.getDatastoreService(); // List<Data> listTwo = new ArrayList(ds.get(keys).values()); // listOne.retainAll(listTwo);

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  • Is Eclipse Remote System Explorer broken on Windows?

    - by Kev
    I have the following setup on Windows 7 Ultimate x64: Eclipse Indigo 2.7.2 (Build: M20120208-0800) Remote System Explorer 3.3.2 (see screenshot) (Oracle/Sun) Java 1.6 Update 31 (x86) Despite all my best efforts I am unable to connect to a remote system (a Centos 5.6 server on my local LAN) using a Remote System Explorer SSH connection - I've tried both password authentication and using my SSH private key. Here is a screenshot of both the Eclipse error dialogue and what is logged in my /var/log/secure log file: /var/log/secure: Apr 1 12:00:21 nagios sshd[6176]: Received disconnect from 172.16.3.88: 3: com.jcraft.jsch.JSchException: Auth fail When I connect for the first time I do get prompted to verify the authenticity of the remote host and the RSA key fingerprint. But that's as far as things go. Performing the same operation with the same credentials on my Fedora Core 16 box (also running the same version of Eclipse and Java) to the same server is successful. This leads me to believe that RSE SSH support on Windows is either broken or there's some piece of the SSH-on-Windows puzzle I'm missing. Is this the case?

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  • C++: A variation of priority queue

    - by Helltone
    I need some kind of priority queue to store pairs <key, value>. Values are unique, but keys aren't. I will be performing the following operations (most common first): random insertion; retrieving (and removing) all elements with the least key. random removal (by value); I can't use std::priority_queue because it only supports removing the head. For now, I'm using an unsorted std::list. Insertion is performed by just pushing new elements to the back (O(1)). Operation 2 sorts the list with std::sort (O(N*logN)), before performing the actual retrieval. Removal, however, is O(n), which is a bit expensive. Any idea of a better data structure?

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  • Possible: Set Operations on Disparate Maps with Same Key Type?

    - by Catskul
    Let's say I have two maps: typedef int Id; std::map<Id, std::string> idToStringMap; std::map<Id, double> idToDoubleMap; And let's say I would like to do a set operation on the keys of the two maps. Is there an easier way to do this than to create a custom "inserter" iterator? such that I could do something like: std::set<Id> resultSet; set_difference( idToStringMap.begin(), idToStringMap.end(), idToDoubleMap.begin(), idToDoubleMap.end(), resultSet.begin() ); My experimentation results imply that it will be necessary to create a custom inserter and perhaps a custom key comparer to do this, but I want for some insight/shortcut before doing so.

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  • help with linq query

    - by Luis
    Hi, i am trying to get some data, but i dont know how can i do a if in linq, this is how i am trying to do from so in db.Operations where ((opType!= "0" ? so.Operation == int.Parse(opType) : false) && (idState!=0 ? so.State == idState : false) && (start != null ? so.StartDate == start : false) && (end !=null ? so.EndDate == end : false)) select so the optype is a Int, the idState is a Int, end is a datetime, start is a datime what i am trying to do is, if those aren't null they add to the query function, so i can get all data together

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  • How to get `gcc` to generate `bts` instruction for x86-64 from standard C?

    - by Norman Ramsey
    Inspired by a recent question, I'd like to know if anyone knows how to get gcc to generate the x86-64 bts instruction (bit test and set) on the Linux x86-64 platforms, without resorting to inline assembly or to nonstandard compiler intrinsics. Related questions: Why doesn't gcc do this for a simple |= operation were the right-hand side has exactly 1 bit set? How to get bts using compiler intrinsics or the asm directive Portability is more important to me than bts, so I won't use and asm directive, and if there's another solution, I prefer not to use compiler instrinsics. EDIT: The C source language does not support atomic operations, so I'm not particularly interested in getting atomic test-and-set (even though that's the original reason for test-and-set to exist in the first place). If I want something atomic I know I have no chance of doing it with standard C source: it has to be an intrinsic, a library function, or inline assembly. (I have implemented atomic operations in compilers that support multiple threads.)

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  • How do you change the subdocument location in a Word 2007 master document programmatically?

    - by boost
    We have had the unenviable happen: various master documents refer to sub-documents that are no longer where they used to be due to a directory renaming. Is there a programmatic way of tweaking the HYPERLINK field without losing the master/sub-document relationship? I've got this far ... Sub FixyaLinks() Dim s 'As String Dim i As Long Dim bTrackRevFlag As Boolean Dim bShowRevFlag As Boolean bTrackRevFlag = ActiveDocument.TrackRevisions bShowRevFlag = ActiveDocument.ShowRevisions ActiveDocument.TrackRevisions = False ActiveDocument.ShowRevisions = False For i = 1 To ActiveDocument.Fields.Count s = ActiveDocument.Fields.Item(i).Code.Text If InStr(s, "CURRICULUM\\NEW") Then s = Replace(s, "NEW Foundation Units-in developing", "Foundation Programme Units") ActiveDocument.Fields.Item(i).Code.Text = s End If Next ActiveDocument.TrackRevisions = bTrackRevFlag ActiveDocument.ShowRevisions = bShowRevFlag End Sub It bombs on ActiveDocument.Fields.Item(i).Code.Text = s, with an error 5686 ("The operation cannot be completed because the Track Changes option in the master document does not match the option the the subdocument. Make the Track Changes option the same in the master document and subdocument.") However, I'm not entirely sure what that means. Ideas anyone?

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  • Workflow 4.0 code activities calling other activites (persist, delay etc)

    - by Lygpt
    I have a bunch of Workflow foundation 4.0 RC code activities that consume web services and talk to databases that I want to add some error handling in. I would really like to be able to attempt to call my web service / db, catch any faults such as a communication failure and then retry the same operation in 1 hours time (after I have logged the exception). Is there a way of doing something like this? protected override void Execute(CodeActivityContext context) { Persist(); // I would like to invoke the persist activity like this if (!AttemptServiceCall()) { // I would like to invoke a delay activity like this Delay(new TimeSpan(0, 30, 0)); // wait 30 mins before trying again Execute(context); // call this activity again } } private bool AttemptServiceCall() { bool serviceCallSuccessful = true; try { myService.InvokeSomeMethod(); } catch (CommunicationException ex) { myEventLogger.Log(ex); serviceCallSuccessful = false; } return serviceCallSuccessful; }

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  • Using injected EntityManager in class hierarchies

    - by Emre Sahin
    The following code works: @Stateless @LocalBean public class MyClass { @PersistenceContext(name = "MyPU") EntityManager em; public void myBusinessMethod(MyEntity e) { em.persist(e); } } But the following hierarchy gives a TransactionRequiredException in Glassfish 3.0 (and standard JPA annotations with EclipseLink.) at the line of persist. @Stateless @LocalBean public class MyClass extends MyBaseClass { public void myBusinessMethod(MyEntity e) { super.update(e); } } public abstract class MyBaseClass { @PersistenceContext(name = "MyPU") EntityManager em; public void update(Object e) { em.persist(e); } } For my EJB's I collected common code in an abstract class for cleaner code. (update also saves who did the operation and when, all my entities implement an interface.) This problem is not fatal, I can simply copy update and sister methods to subclasses but I would like to keep all of them together in a single place. I didn't try but this may be because my base class is abstract, but I would like to learn a proper method for such a (IMHO common) use case.

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  • Restarting service from a client computer without rights

    - by Jason
    I have already created the program to restart a SQL database but it only works if the client has the rights. This is going to be done on a local network from a client computer when they can't get a person that has the password on the phone. Any thoughts I'm currently using the servicecontroller to start and stop database. When I don't have the rights I get a access denied error, or This operation might require other privileges. Not sure if impersonation would work since I don't have the userid and password.

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  • Socket Select with empty fd set

    - by whoi
    Hi; Suppose you have an fd set which can have zero or more sockets in it. When I try to call select operation on empty fd set, what I get is -1 as the number of fds which are set, meaning error. So what would you suggest to overcome this problem, you might say do not call if empty but I have a loop and any time fd set can hold 0 or more sockets. What is the best approach about this problem? (we are on C programming language)

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  • How can I parse a C header file with Perl?

    - by Alphaneo
    Hi, I have a header file in which there is a large struct. I need to read this structure using some program and make some operations on each member of the structure and write them back. For example I have some structure like const BYTE Some_Idx[] = { 4,7,10,15,17,19,24,29, 31,32,35,45,49,51,52,54, 55,58,60,64,65,66,67,69, 70,72,76,77,81,82,83,85, 88,93,94,95,97,99,102,103, 105,106,113,115,122,124,125,126, 129,131,137,139,140,149,151,152, 153,155,158,159,160,163,165,169, 174,175,181,182,183,189,190,193, 197,201,204,206,208,210,211,212, 213,214,215,217,218,219,220,223, 225,228,230,234,236,237,240,241, 242,247,249}; Now, I need to read this and apply some operation on each of the member variable and create a new structure with different order, something like: const BYTE Some_Idx_Mod_mul_2[] = { 8,14,20, ... ... 484,494,498}; Is there any Perl library already available for this? If not Perl, something else like Python is also OK. Can somebody please help!!!

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  • HOWTO: Deserialize WCF message using OperationContract

    - by Stefan
    Hi, I succeeded in building a WCF client generated by svcutil.exe from the WSDL. Using the generated client proxy class I can call the web service of an external service supplier. I also succeeded in coding a message inspector, as I need to log both raw XML request and response as full SOAP message to the database. For an emergency szenario I also need to be able to "import" a raw XML response. I found many hints on using XMLSerializer or deserializing WCF messages based on the message contract. But how can I deserialize a raw XML response based on an operation contract? For a first test I use one of the logged raw responses, save it to a file and now try to deserialize it to the response type as generated in the client proxy. Somehow I must succeed in calling DeserializeReply() from class ClientOperation. But how to get there? I happily acced any help as I'm quite new to WCF... TIA, Stefan

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