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• How to pass data between pages without sessions in ASP.net MVC

  - by Ashwani K

  Hello All: I have one application in which I want to pass data between Pages (Views) without sessions. Actually I want to apply some settings to all the pages using query string. For example if my link is like "http://example.com?data=test1", then I want to append this query string to all the link there after and if there is no query string then normal flow. I was thinking if there is any way that if we get the query string in any link for the web application then some application level user specific property can be set which can be used for subsequent pages. Thanks, Ashwani

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• Hierarchy based aggregation

  - by Ganapathy Subramaniam

  I have a hierarchy table in SQL Server 2005 which contains employees - managers - department - location - state. Sample table for hierarchy table: ID Name ParentID Type 1 PA NULL 0 (group) 2 Pittsburgh 1 1 (subgroup) 3 Accounts 2 1 4 Alex 3 2 (employee) 5 Robin 3 2 6 HR 2 1 7 Robert 6 2 Second one is fact table which contains employee salary details ID and Salary. Sample data for fact table: ID Salary 4 6000 5 5000 7 4000 Is there any good to way to display the hierarchy from hierarchy table with aggregated sum of salary based on employees. Expected result is like Name Salary PA 15000 (Pittsburgh + others(if any)) Pittusburgh 15000 (Accounts + HR) Accounts 11000 (Alex + Robin) Alex 6000 (direct values) Robin 5000 HR 4000 Robert 4000 In my production environment, hierarchy table may contain 23000+ rows and fact table may contain 300,000+ rows. So, I thought of providing any level of groupid to the query to retrieve just its children and its corresponding aggregated value. Any better solution?

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• Basic HTTP Authentication using Obj C and Xcode.

  - by Kristiaan

  Hi Everyone, I am hoping someone can help me with a question i have relating to Basic HTTP Authentication in an Xcode 2.3 application. Basically i have a PHP page that is on our server and when called with certain parameters returns data relating to the servers condition etc. i have managed to get a small Xcode application working where by it reads the data from the page and populates an NSTextView with the data. however to make sure this information stays safe i have setup basic HTTP Authentication on the page, but i cannot work out how to provide the username and password in XCode. here is my code to retrieve the page. NSURL *url = [NSURL URLWithString:@"http://www.google.com"]; NSString *content = [NSString stringWIthContentsOfUrl:url]; [myTextView setString:content]; i am still at a very basic beginner level regarding xcode and obj c, so nice simple examples of how i go about this would really be appreciated. Thanks Kris

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• Serial Mac OS X constantly freezes/locks/dissappears for USB to Arduino

  - by Niraj D

  I have a problem with my C++ code running in Xcode with both the AMSerial library as well as the generic C (ioctl, termios). After a fresh restart, my application works well but after I "kill" the program the Serial (I think) is not released. I have checked my open files under /dev and have killed the connection to serial USB from there, but my C++ still can't open the USB port. I have narrowed this down to being a low level Mac OS X issue, regarding blocking the port indefinitely, regardless of closing it using the aforementioned libraries. Just for context, I'm trying to send numbers through my USB port, serially to an Arduino Duemilanove at 9600 baud. Running Serial Monitor in Arduino is perfectly fine, however, running through a C++ application it freezes up my computer, occasionally, my mouse/keyboard freeze up: requiring a hard reset. How can this problem be fixed? It seems like Mac OS X is not USB friendly!

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• Datamining on a mysql database

  - by sliptix

  Hello, I Begin with textmining. I have two database tables with thousands of data.. a table for "skills" and a table for "skills categories" every "skill" belongs to a skills categorie. a "skill" is , physicaly, a varchar(200) field in the database, where there is some text describing the skill. Here are some skills extracted from the skills table: "PHP (good level), Java (intermediaite), C++" "PHP5" "project management and quality management" "begining Javascript" "water engineering" "dfsdf zerze rzer" "cibling customers" what i want to do is to extract knowledge from those fields, i mean extract only the real skill and ignore the rest of useless text. for the above example i want to get only an array with: "PHP" "Java" "C++" "PHP5" "project management" "quality management" "Javascript" "water engineering" "cibling customers" what should i do to extract the skills from tons of data please ? do you know specific algorithms to do this ? ex : k-means ... ? Thanks in advance.

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• flex blazeds spring exception translator

  - by Shah Al

  I am using spring exception translator to wrap java exception into flex exception. eg public void testException()throws Exception{ throw new Exception("my exception"); } But for some reason, I am getting IllegalAccessError. The code sections are entering the testException and the Translator class. Question: why it trying to get log target level ? Can someone help me resolve this please. Below is the lines from the log: MyExceptionTranslatorImpl.translate()class java.lang.IllegalAccessError MyExceptionTranslatorImpl.translate()java.lang.IllegalAccessError: tried to access method flex.messaging.log.Log.getTargetLevel()S from class flex.messaging.MessageException MyExceptionTranslatorImpl.translate()tried to access method flex.messaging.log.Log.getTargetLevel()S from class flex.messaging.MessageException [BlazeDS] tried to access method flex.messaging.log.Log.getTargetLevel()S from class flex.messaging.MessageException [BlazeDS] Serializing AMF/HTTP response

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• Oracle Linked Server error: ORA-12640: Authentication adapter initialization failed

  - by Chenster

  I have a linked server on SQL Server that talks to Oracle. Executing the following sql statement using Openquery SELECT * FROM OPENQUERY(finance, 'select * from KFRI.VW_XREF_PROJECTS') will get error as the following: OLE DB provider "OraOLEDB.Oracle" for linked server "finance" returned message "ORA-12640: Authentication adapter initialization failed". Msg 7303, Level 16, State 1, Line 1 Cannot initialize the data source object of OLE DB provider "OraOLEDB.Oracle" for linked server "finance". I tried to set : SQLNET.AUTHENTICATION_SERVICES= (NONE) in {$ORACLE_HOME}\NETWORK\ADMIN\sqlnet.ora. It did not help. What's interesting is my coworker is able to execute the exactly same query successfully on his machine without a hitch. Any tips on how to fix this is greatly appreciated!!

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• Best Practices for Source Control Dependencies

  - by VirtuosiMedia

  How do you handle source control setup of a project that has dependency on a separate framework or library? For example, Project A uses Framework B. Should Project A also include the code from Framework B in its repository? Is there a way for it to be included automatically from a different repository or would I have to updated it manually? What are the general approaches are usually taken for this scenario? Assume that I control the repositories for both Project A and Framework B and that the source code for both is not compiled. Any resources or suggestions would be greatly appreciated. I'm currently using Subversion (on a very basic level), but I would like to switch to Mercurial so that I can try out Kiln with Fogbugz. Edit: In Mercurial, would you use parent repositories for this function?

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• How to Test a Multi-Tenant App with support for multiple domains

  - by asifch

  HI, we are building a multi-tenant application, which will support that each tenant can have a unique top level domain, the application is build using the asp.net 3.5 and SQL servr 2005, while each tenant will have different database. I have seen a number of questions about the similar applications on the StackOverFlow, but none of them is related to the Testing, I want to know is how one can test the application in a development environment, specially How can we test that each customer connects to his own DB based on the URL. how can we emulate different domains on the local system. like abc.com and xyz.com all goes to dev machine's IIS. Any recommendations which might help us in the developing process of such an application.

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• OpenDataSource fails pls help

  - by Vivek Chandraprakash

  I'm trying export records from SQL Server 2008 to mdb file using OpenDataSource. It works when I log in using Windows authentication. But it fails when I use SQL Server authentication. This is the error i get OLE DB provider "Microsoft.Jet.OLEDB.4.0" for linked server "(null)" returned message "Could not delete from specified tables.". Msg 7320, Level 16, State 2, Procedure EXPORT_Employee, Line 110 Cannot execute the query "DELETE FROM employee_export " against OLE DB provider "Microsoft.Jet.OLEDB.4.0" for linked server "(null)". Thanks -Vivek

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• How do you change the allowDefinition section attribute using appcmd in IIS 7?

  - by Edward Wilde

  Is it possible to use appcmd to change the value of allowDefinition? Specifically I'm try to enable changes to the httpCompression module at the application level. Modifying the applicationHost.config by manually changing the following line: <section name="httpCompression" allowDefinition="AppHostOnly" overrideModeDefault="Deny" /> To <section name="httpCompression" allowDefinition="MachineToApplication" overrideModeDefault="Allow" /> allows me to then execute the following appcmd commands: appcmd set config "website name" /section:httpCompression /noCompressionForProxies:false appcmd set config "website name" /section:httpCompression /noCompressionForHttp10:false However I need a solution that does not rely on manually editing the applicationHost.config

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• Image scaling in C

  - by Ganesh

  Hi, I am designing a jpeg to bmp decoder which scales the image. I have been supplied with the source code for the decoder so my actual work is to design a scaler . I do not know where to begin. I have scouted the internet for the various scaling algorithms but am not sure where to introduce the scaling. So should I do the the scaling after the image is converted into bmp or should I do this during the decoding at the MCU level. am confused :( If you guys have some information to help me out, its appreciated. any material to read, source code to analyse etc....

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• Keep-alive for long-lived HTTP session (not persistent HTTP)

  - by stackoverflowuser2010

  At work, we have a client-server system where clients submit requests to a web server through HTTP. The server-side processing can sometimes take more than 60 seconds, which is the proxy timeout value set by our company's IT staff and cannot be changed. Is there a way to keep the HTTP connection alive for longer than 60 seconds (preferably for an arbitrarily long period of time), either by heartbeat messages from the server or the client? I know there are HTTP 1.1 persistent connections, but that is not what I want. Does HTTP have a keep-alive capability, or would this have to be done at the TCP level through some sort of socket option?

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• How to create a folder for each item in a directory?

  - by Adrian Andronic

  I'm having trouble making folders that I create go where I want them to go. For each file in a given folder, I want to create a new folder, then put that file in the new folder. My problem is that the new folders I create are being put in the parent directory, not the one I want. My example: def createFolder(): dir_name = 'C:\\Users\\Adrian\\Entertainment\\Coding\\Test Folder' files = os.listdir(dir_name) for i in files: os.mkdir(i) Let's say that my files in that directory are Hello.txt and Goodbye.txt. When I run the script, it makes new folders for these files, but puts them one level above, in 'C:\Users\Adrian\Entertainment\Coding. How do I make it so they are created in the same place as the files, AKA 'C:\Users\Adrian\Entertainment\Coding\Test Folder'?

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• ASP.NET - Missing #includes cause compilation errors: Failed to map the path '...'

  - by frankadelic

  I have an ASP.NET application which features some server-side includes. For example: <!--#include virtual="/scripts.inc" --> These files are not present in my ASP.NET website project because my website starts in a virtual directory: /path-to-my-application When I choose Build Web Site, I get this error: Failed to map the path '/scripts.inc' Visual Studio cannot resolve these include files that are defined at the root directory level. They are not visible in the website project. Aside from manually commenting out the #include references, is there any way I can get the website to build? Can I force Visual Studio to ignore those errors and compile the site? Once the website is pushed out to IIS, there is no problem, because all the #include files are in place. NOTE - Web Controls are not an option for this application. Please assume #include files are a requirement. Also, I cannot move the include files since they are used by other applications.

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• Is there a log file analyzer for log4j files?

  - by Juha Syrjälä

  I am looking for some kind of analyzer tool for log files generated by log4j files. I am looking something more advanced than grep? What are you using for log file analysis? I am looking for following kinds of features: The tool should tell me how many time a given log statement or a stack trace has occurred, preferably with support for some kinds of patterns (eg. number of log statements matching 'User [a-z]* logged in'). Breakdowns by log level (how many INFO, DEBUG lines) and by class that initiated the log message would be nice. Breakdown by date (how many log statements in given time period) What log lines occur commonly together? Support for several files since I am using log rolling Hot spot analysis: find if there is a some time period when there is unusually high number of log statements Either command-line or GUI are fine Open Source is preferred but I am also interested in commercial offerings My log4j configuration uses org.apache.log4j.PatternLayout with pattern %d %p %c - %m%n but that could be adapted for analyzer tool.

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• Are tile overlays possible with the iPhone's MapKit

  - by rickharrison

  I already have a tile source set up for use with the Google Maps JavaScript API. I am trying to translate this for use with the iPhone MapKit. I have correctly implemented the javascript zooming levels into mapkit. Whenever - (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated is called, I snap the region to the nearest zoom level based on the same center point. Is it possible to implement a solution possibly with CATiledLayer to implement a tiling solution. Does the iPhone use the standard 256x256 tiles like google maps does natively? Any direction or help on this would be greatly appreciated. I would rather not waste a couple weeks trying to implement this if it's not possible.

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• Configure Tomcat to send web pages compatible to IE 7 or 6

  - by Spiderman

  I have got an application that is not compatible to work using IE8 browser. I am looking for a way to to configure Tomcat on which this application run, so the pages could be read by IE8 and treated as if they are IE7 or IE6 By googling so far I found a possible suggestion which say to add to the http response the header: X-UA-Compatible: IE=EmulateIE7 here that tell IE8 to be like IE7. The problem is that this way requires adding a filter that should be added on application level. I'd like to know if any of you is familiar with a more generic way that Tomcat enables to send its http content to be IE7 (or IE6) compatible ?

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• Updating Visual FoxPro from SQL Server

  - by David Stein

  I'm trying to update some simple Visual FoxPro tables with SQL Server. I've created a linked server with the following: sp_addlinkedserver @server = 'UTIL', @srvproduct = 'VFP', @provider = 'VFPOLEDB', @datasrc = 'L:\M2MDATA\Util\util.dbc' GO And the following works: select * from UTIL...utcomp However, I cannot use the following statement: update util...utcomp set fmaddress = '123 Elvis Dr.' where fcsqldb = 'M2MDATA01' I receive the error: OLE DB provider "VFPOLEDB" for linked server "util" returned message "Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done.". Msg 7333, Level 16, State 2, Line 2 Cannot fetch a row using a bookmark from OLE DB provider "VFPOLEDB" for linked server "util". I have the latest version (9.0) installed so I should have the latest provider. Am I doing something wrong? Is it not possible to update VFP from SQL?

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• How to avoid the "divide by zero" error in SQL?

  - by Henrik Staun Poulsen

  I hate this error message: Msg 8134, Level 16, State 1, Line 1 Divide by zero error encountered. What is the best way to write SQL code, so that I will never see this error message again? I mean, I could add a where clause so that my divisor is never zero. Or I could add a case statement, so that there is a special treatment for zero. Is the best way to use a NullIf clause? Is there better way, or how can this be enforced?

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• What is the C# static fields naming convention?

  - by Matt

  I have recently started using ReSharper which is a fantastic tool. Today I came across a naming rule for static fields, namely prefixing with an underscore ie. private static string _myString; Is this really the standard way to name static variables? If so is it just personal preference and style, or does it have some sort of lower level impact? Eg Compilation JIT etc? Where does this style originate from? I have always associated it with C++, is that correct?

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• Entity Framework 4 relationship management in POCO Templates - More lazy than FixupCollection?

  - by Joe Wood

  I've been taking a look at EF4 POCO templates in beta 2. The FixupCollection looks fine for maintaining the model correctness after updating the relationship collection property (i.e. product.Orders it would set the order.Product reference ). But what about support for handling the scenario when some of those Order objects are removed from the context? The use-case of maintaining cascading deletes in the in-memory model. The old Typed DataSet model used to do this by performing the query through the container to derive the relationship results. Like the DataSet, this would require a reference to the ObjectContext inside the entity class so that it could query the top-level Order collection. Better support for Separation of Concerns in the ObjectContext would be required. It looks like EF is not suited to this use-case that DataSets did out of the box.... am I right?

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• CSS Frameworks like 960 and Blueprint?

  - by Dean J

  This is at the framework level, not dealing directly with CSS, so posting to SO. I just learned about the existence of CSS frameworks. 960 Grid System seems pretty awesome, then I found Blueprint, which seems to do the same thing and more. Is there a better word than "framework" to categorize this? Are there any other products in this category? In response to one of the comments http://stackoverflow.com/questions/1483565/link-to-a-site-designed-using-a-css-framework-blueprint-960-etc, "how many example frameworks do you want? he just listed two of them.", I'd love to have more than two examples, unless those are the only two in the running. Blueprint, which is "the original CSS framework" 960 Grid System, which is a tool to have a grid underlying your screen. YUI 2: Grids, similar to 960? The rest of YUI is more similar to JQuery?

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• LINQ error when deployed - Security Exception - cannot create DataContext

  - by aximili

  The code below works locally, but when I deploy it to the server it gives the following error. Security Exception Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. The code is protected void Page_Load(object sender, EventArgs e) { DataContext context = new DataContext(Global.ConnectionString); // <-- throws the exception //Table<Group> _kindergartensTable = context.GetTable<Group>(); Response.Write("ok"); } I have set full write permissons on all files and folders on the server. Any suggestions how to solve this problem? Thanks in advance.

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• Delegate, BeginInvoke. EndInvoke - How to clean up multiple Async threat calls to the same delegate?

  - by Dan

  I've created a Delegate that I intend to call Async. Module Level Delegate Sub GetPartListDataFromServer(ByVal dvOriginal As DataView, ByVal ProgramID As Integer) Dim dlgGetPartList As GetPartListDataFromServer The following code I use in a method Dim dlgGetPartList As New GetPartListDataFromServer(AddressOf AsyncThreadMethod_GetPartListDataFromServer) dlgGetPartList.BeginInvoke(ucboPart.DataSource, ucboProgram.Value, AddressOf AsyncCallback_GetPartListDataFromServer, Nothing) The method runs and does what it needs to The Asyn callback is fired upon completion where I do an EndInvoke Sub AsyncCallback_GetPartListDataFromServer(ByVal ar As IAsyncResult) dlgGetPartList.EndInvoke(Nothing) End Sub It works as long as the method that starts the BeginInvoke on the delegate only ever runs while there is not a BeginInvoke/Thread operation already running. Problem is that the a new thread could be invoked while another thread on the delegate is still running and hasnt yet been EndInvoke'd. The program needs to be able to have the delegate run in more than one instance at a time if necessary and they all need to complete and have EndInvoke called. Once I start another BeginInvoke I lose the reference to the first BeginInvoke so I am unable to clean up the new thread with an EndInvoke. What is a clean solution and best practice to overcome this problem?

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