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• .NET ExcelLibrary Export Problems - .XLS corruption

  - by hamlin11

  The library is located here: http://code.google.com/p/excellibrary/ I'm using some basic code to create an .XLS file. When I open the file in Excel 2007, I get the following errors: I click yes, then I get: And just for fun, here's the XML error details (not very helpful) Here's the code that I'm using to generate the Excel file: Dim ds As New DataSet Dim dt1 As New DataTable("table 1") dt1.Columns.Add("column A", GetType(String)) dt1.Columns.Add("column B", GetType(String)) dt1.Rows.Add("test 1", "Test 2") dt1.Rows.Add("test 3", "Test 4") ds.Tables.Add(dt1) ExcelLibrary.DataSetHelper.CreateWorkbook("c:/temp/test1.xls", ds) Note: I added a reference to the DLL provided by the project download page and have an "Imports ExcelLibrary.Office.Excel" to link up with it Any ideas on what the corruption is and/or how to fix it? Thanks

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• Cast error on SQLDataReader (entlib 5.0, asp.net 3.5, vb)

  - by Phil

  My site is using enterprise library v 5.0. Mainly the DAAB. Some functions such as executescalar, executedataset are working as expected. The problems appear when I start to use Readers I have this function in my includes class: Public Function AssignedDepartmentDetail(ByVal Did As Integer) As SqlDataReader Dim reader As SqlDataReader Dim Command As SqlCommand = db.GetSqlStringCommand("select seomthing from somewhere where something = @did") db.AddInParameter(Command, "@did", Data.DbType.Int32, Did) reader = db.ExecuteReader(Command) reader.Read() Return reader End Function This is called from my aspx.vb like so: reader = includes.AssignedDepartmentDetail(Did) If reader.HasRows Then TheModule = reader("templatefilename") PageID = reader("id") Else TheModule = "#" End If This gives the following error on db.ExecuteReader line: Unable to cast object of type 'Microsoft.Practices.EnterpriseLibrary.Data.RefCountingDataReader' to type 'System.Data.SqlClient.SqlDataReader'. Can anyone shed any light on how I go about getting this working. Will I always run into problems when dealing with readers via entlib?

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• WCF ValidationFault

  - by RandomNoob

  I'm using Validation Application Block - Enterprise Library to validate parameters sent to my WCF Service operations. For instance, a certain operation requires the parameter to either be a 1 or 6, like so: [OperationContract(Name="GetEmployeesByRegion")] [FaultContract(typeof(ValidationFault))] List<Employees> GetEmployeesByRegion([DomainValidator(1,6)]int regionId); This works just fine i.e the validation fault occurs however, when the service is invoked by the client, a generic System.ServiceModel.FaultException is thrown. An the message indicates: "The creator of this fault did not specify a reason." Now, I could check the parameters myself before the service cal and throw a custom fault but that seems to defeat the purpose of attribute based validation of parameters using the Validation Application Block. Is there anyway to customize the error returned by the validation Fault? It is also possible I'm doing something completely wrong. I just want the caller to know that he/she should have passed in a 1 or 6 in the exception message. Is this possible?

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• ExceptionPolicy.HandleException does not install Event Source for Logging in Registry if XBAP run ou

  - by Neo

  I am using the Logging Application Block (of Microsoft Enterprise Library) to log exceptions in the Event Viewer that occur in my WPF XBAP application. If I run the XBAP in the debugger from Visual Studio, an Event Source entry for my application is automatically created in the Registry at: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\MyApp This occurs at the point ExceptionPolicy.HandleException() is called. However, if I run the XBAP outside of the IDE directly from the file system or from its published location, the Registry entry isn't added. Therefore, no logging takes place. I can only assume this is a security issue with running XBAP applications and they do not have access to write to the Registry. Is this a setting within my project? Any idea on why this might be happening? Any help much appreciated.

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• Sparse matrices / arrays in Java

  - by DanM

  I'm working on a project, written in Java, which requires that I build a very large 2-D sparse array. Very sparse, if that makes a difference. Anyway: the most crucial aspect for this application is efficency in terms of time (assume loads of memory, though not nearly so unlimited as to allow me to use a standard 2-D array -- the key range is in the billions in both dimensions). Out of the kajillion cells in the array, there will be several hundred thousand cells which contain an object. I need to be able to modify cell contents VERY quickly. Anyway: Does anyone know a particularly good library for this purpose? It would have to be Berkeley, LGPL or similar license (no GPL, as the product can't be entirely open-sourced). Or if there's just a very simple way to make a homebrew sparse array object, that'd be fine too. I'm considering MTJ, but haven't heard any opinions on its quality. Thanks!! -Dan

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• Boolean Expression Evaluation in Java

  - by Trilok

  Hey everyone, Is there a relatively simpler (when compared with writing a parser) way to evaluate boolean expressions in Java? I do not want to use the JEP library. I have a String expression something like: (x 4 || x < 8 && p 6) [ I will replace the variables with values. Is there a way by which I can evaluate this expression? The problem is, this can be any level deep. So, writing a parser would be really complex. Thanks

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• Common and useful Graph functions?

  - by Nazgulled

  Hi, I'm implementing a simple Graph library for my uni project and since this is the first time I'm dealing with graphs, I would like to know which functions you guys consider to be most common and useful for Graph implementations... So far, I have this: graphInitialize() graphInsertVertex() graphRemoveVertex() graphGetVertex() graphGetVertexValue() (not implemented yet, not sure if I'll need it) graphInsertEdge() graphRemoveEdge() graphLinkVertices() (this calls graphInsertEdge twice for bidirectional graph) graphUnlinkVertices() (this calls graphRemoveEdge twice for bidirectional graph) graphDestroy() I know I'm missing a function do determine the shortest path, but I'm leaving that for last... Do you think I'm missing any common/useful function?

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• Oracle ADF 11g - Einladung zu den News Online Sessions - n&auml;chster Termin: 18. M&auml;rz 2011

  - by heidrun.walther

  Was ist ADF? ADF steht für Oracle Application Develoment Framework. ADF setzt die JEE Standards um und erweitert deren Funktionalität insbesondere im Hinblick auf die Vielzahl der zur Verfügung gestellten Komponenten (insbesondere im Hinblick auf die Visualisierung) und im Bereich der Ablaufsteuerung (Taskflows ersetzen Pageflows). ADF ist einer der Bausteine, auf denen die Entwicklung aller neuen Oracle Anwendungssysteme beruht (inkl. Vertical Solutions und der Administrationswerkzeuge). Das verwendete Entwicklungswerkzeug ist der Oracle JDeveloper. Rapid Application Development (RAD) wird durch eine deklarative, Metadaten getriebene Entwicklung ermöglicht, die auf allen Ebenen in starkem Maße mit Templating (also der Möglichkeit, mit vorgegebenen Mustern zu arbeiten) und mit Wiederverwendbarkeit arbeitet. Entwicklung und Dokumentation erfolgen in einem Schritt. ADF arbeitet nahtlos mit den anderen Oracle SOA Werkzeugen zusammen und bringt ein Rollen-/ Policy getriebenes Zugriffssystem mit. Es ist in das Oracle Identity Management integrierbar. ADF News Online Sessions? Die ADF News Online Sessions geben Tipps von Anwendern/Entscheidern für Anwender/Entscheider und bieten einen Ideenaustausch für den Einsatz von ADF bzw. für die Umsetzung von ADF Projekten. Die jeweiligen  Referenten sind Mitarbeiter von Oracle Partnerunternehmen und Oracle ADF-Spezialisten. Hier die Inhalte derVierte News-Staffel: 18.02.11 - Managing Migrationsprojekte: Forms - ADF / Erfahrungsbericht 04.03.11 - Using Groovy in Oracle ADF Business Components (english) 18.03.11 - Taskflow orientierte Entwicklung mit UI Shell 01.04.11 - erste Konzept, Überblick, Integration Desktop ADF 15.04.11 - ADF Best Practice: ADF BC Strukturierung 29.04.11 - Anpassung von ADF Anwendungen zur Laufzeit (Endanwender) mit Oracle WebCenter Sie erhalten die Einwahldaten für die jeweilige Session, wenn Sie sich entweder in den Mailverteiler aufnehmen lassen (Mail an [email protected]) oder über die ADF Community Seiten auf XING, indem Sie sich für die betreffende Session anmelden. Oracle ADF Community? Die Oracle ADF Community setzt sich das Ziel, Informationen und Erfahrungen zu Oracle ADF auszutauschen und damit die Entwicklungs-Plattform Oracle Application Development Framework (ADF) unter Entwicklern, Anwendern und IT-Dienstleistern bekannter zu machen. Sie sind herzlich eingeladen, sich aktiv daran zu beteiligen. Mehr unter ADF Community Gruppe auf Xing

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• What are the advantages and disadvantages to using your real name online?

  - by Jon Purdy

  As a programmer, do you see any professional or other advantage in using your real name in online discourse, versus an invented handle? I've always gone by a single username and had my real name displayed whenever possible, for a few reasons: My interests online are almost exclusively professional and aboveboard. It constructs a search-friendly public log of all of my work, everywhere. If someone wants to contact me, there are many ways to do it. My portfolio of work is all tied to me personally. Possible cons to full disclosure include: If you feel like becoming involved in something untoward, it could be harder. The psychopath who inherits your project can more easily find out where you live. You might be spammed by people who are not worth the precious time that could be better spent writing more of the brilliant software you're famous for. Your portfolio of work is all tied to you personally. It seems, anyway, that a vast majority of StackOverflow users go by invented handles rather than real names. Notable exceptions include the best-known users, who are typically well established in the industry. But how could we ever become legendary rockstar programmers if we didn't get our names out there? Discuss.

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• org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be res

  - by user291750

  I've been having the following problem with my GoDaddy's server. I am using JSPs with the JSTL Library. My /WEB-INF/lib folder contains the following libraries: jstl.jar standard.jar My JSP looks something like this: <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <p>Hello! <% out.print(System.getProperty("java.class.path")); %></p> But I keep getting the following exception: org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application Any ideas as to why it is doing that? Thanks

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• How to develop Online Shopping Portal Application using PHP ?

  - by Sarang

  I do not know PHP & I have to develop a Shopping Portal with following Definition : Scenario: Online Shopping Portal XYZ.com wants to create an online shopping portal for managing its registered customers and their shopping. The customers need to register themselves first before they do shopping using the shopping portal. However, everyone, whether registered or not, can view the various products along with the prices listed in the portal. The registered customers, after logging in, are allowed to place order for one or more products from the products listed in the portal. Once the order is placed, the customer gets a reference order number and the order status should be “order in process”. The customers can track their order using the given reference number. The management of XYZ.com should be able to modify the order status of a particular reference order number to “shipped” once the products are shipped to the shipping address entered by the customer at the time of placing the order. The Functionalities required are : Create the interface for the XYZ.com shopping portal using HTML/XHTML and CSS. Implement the client side validations using JavaScript. Create the tables using MySQL. Implement the functionality using the server side scripting language, PHP. Integrate all the above tasks and make the XYZ.com shopping portal functional. How do I develop this application with following proper steps of development ?

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• How to write outline data into .otf files?

  - by Sorush Rabiee

  I need to edit or completely replace outline data (bezier curves) of OpenType fonts. the input data is an EPS file that i have to write it into one specified glyph of an otf file with a certain scaling. (The glyph is specified by PostScript name OR Unicode value.) I need something like an encoder (or just a library of file structure of OpenType)? where to find about structure of otf and ttf files? Note: python-realated tools and libraries are performed :-?

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• Sharepoint checkin/checkout

  - by Prashanth

  We have a sharepoint based application that uses a custom database for storing metadata/files (which could also be on a file share) My question is how can the standard file checkin/check out option in document library be customized? The javascript file ows.js in the layouts folder contains the functions that provide checkin/check out/ open file functionality. Behind the scenes it relies on a combination of HTTP Post/GET methods + SOAP + an activeX control to achieve the desired functionality. Customizing these javascript function seems tedious/error prone. Note that we have a web service that exposes endpoints, for retrieving necessary file information/data from the backend. The difficulty is in integrating it with the sharepoint js functions, due to lack of proper documentation. (Also the js functions might change over different versions of sharepoint) Also is it possible to create files/open files etc from the cache area on the client machine from server side code?

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• Ask the Readers: What Tools Do You Use to Score Great Deals Online?

  - by Jason Fitzpatrick

  The internet has made scoring awesome deals a cinch—but only if you have the right tools and know where to look. This week we want to hear about your favorite tools for scoring the deepest discounts during your online shopping adventures. What we’re most interested in is the tools you use: browser plugins, bookmarklets, and other tools that help you stay on top of price drops and other deal-related information. So let’s hear about it in the comments! What tools do you use to score great deals online? We’ll read all your comments, gather quotes, and share the collective wisdom of the How-To Geek crowd in a follow-up What You Said post on Friday. Latest Features How-To Geek ETC Macs Don’t Make You Creative! So Why Do Artists Really Love Apple? MacX DVD Ripper Pro is Free for How-To Geek Readers (Time Limited!) HTG Explains: What’s a Solid State Drive and What Do I Need to Know? How to Get Amazing Color from Photos in Photoshop, GIMP, and Paint.NET Learn To Adjust Contrast Like a Pro in Photoshop, GIMP, and Paint.NET Have You Ever Wondered How Your Operating System Got Its Name? Etch a Circuit Board using a Simple Homemade Mixture Sync Blocker Stops iTunes from Automatically Syncing The Journey to the Mystical Forest [Wallpaper] Trace Your Browser’s Roots on the Browser Family Tree [Infographic] Save Files Directly from Your Browser to the Cloud in Chrome and Iron The Steve Jobs Chronicles – Charlie and the Apple Factory [Video]

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• Are there any tools to help the user to design a State Machine to be consumed by my application?

  - by kolrie

  When reading this question I remembered there was something I have been researching for a while now and I though Stackoverflow could be of help. I have created a framework that handles applications as state machines. Currently all the state business logic and transactions are handled via Java code. I was looking for some UI implementation that would allow the user to draw the state machines and transactions and generate a file that can later on be consumed by my framework to "run" the workflow according to one or more defined state machines. Ideally I would like to use an open standard like SCXML. The goal as the UI would be to have something like this plugin IBM have for Rational Software Architect: Do you know any editor, plugin or library that would have something similar or at least serve as a good starting point?

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• how to call any method of Project from classlibrary?

  - by Pankaj Mishra

  Hello I have Class Library Where a class of multithreading Of Producer and consumer based. private void WorkDeQueue() { while (true) { string Url = null; lock (locker) { if (queueList.Count > 0) { Url = queueList.Dequeue(); /* return if a null is found in the queue */ if (Url == null) return; } } if (Url != null) { /* if a job was found then process it */ GetData(Url); //This Is a Method } else { /* if a job was not found (meaning list is empty) then * wait till something is added to it*/ wh.WaitOne(); } } } this GetData method has no body on that class. How can i call any method of my project in palace of getdata. I tried with factory Pattern and also with reflection. but both didn't worked for me. So plz tell me how can i call any method of my project from here.

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• Helper functions & prototype methods to replace heavy frameworks?

  - by Rob

  All frameworks aside, what are some of the common helper functions/prototype methods you use on a daily basis? Please note I am not arguing against frameworks. I've simply found that the majority of what I do on a daily basis can, most often, be done with a few dozen Array, String and Element.prototype methods. With the addition of a few helper functions like $ (getElementsById) and $$$ (getElementsByClass), I am able to satisfy some of the core benefits, however basic, of a much heavier framework. If you were to collect a small library of basic methods and functions to replace the core functionality of some of the popular frameworks, what would they be?

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• Choosing MooTools over Google closure?

  - by Shekhar

  I am in a process to select javascript library for our new web application. This app is not very UI heavy but has forms, reports, search, calendars, tabs and target multiple countries like most web apps. We are a tiny team. Biggest concern is maintainability and readability of the code. We are Python programmers. After evaluating many other javascript frameworks we have narrowed down to mootools and google-closure. We loved mootools syntax. It took us no time to learn. It's like Python. On other hand we were stumped seeing private/public in google closure. It's tempting to go for mootools however, I would love to hear from you about specific advantages these frameworks offer over each other.

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• grid controls for ASP.NET MVC ?

  - by MikeJ

  If you are using ASP.NET MVC how are you doing grid display? Rolled your own? Got a library from somewhere? These are some of the known grid display solutions I have found for ASP.NET MVC ASP.NET MVC Flexgrid - Has nice column layout method Code based ASP.NET MVC GridView - simple, small, clean MVC Contrib - grid from codePlex jQueryGrid - jQuery grid Datatables - jQuery plugin - believed to be section 508 compliant extJS - cross browser RIA framework - has grid support Ingrid - jQuery data grid Terlerik MVC - jQuery based grid that is GPL v2 licensed, commercial version also available If you know of anything else that you are using or know to be good, please let me know.

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• How do I distinguish a SharePoint file update as being from a file upload?

  - by ccomet

  In SharePoint, when an item is first added to a document library, it fires the ItemAdded and ItemAdding events as expected. And if you upload the same filename to update the existing file, it will fire off ItemUpdated and ItemUpdating events, likewise as expected. However, I have been unsuccessful at determining whether this kind of action has actually occurred or not. Or, more specifically, I am entirely unable to differentiate between the following: An item is updated because someone uploaded a new file but did nothing to any of the form fields. An item is updated because someone hit "OK" but did nothing to any of the form fields. Is there actually a way to distinguish these kinds of updates? There appears to be nothing in event properties that contains this information, nor in the version history for both the list item and the file itself. I have even tried comparing the files themselves via OpenBinary(), but in both mentioned cases I still get the same result. Thank you in advance for any help!

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• PhysX SDK - error LNK2019: unresolved external symbol when compiling "wavefront.cpp"

  - by user370102

  Hi all, I'm using the PhysX SDK and I'm trying to load an .obj file with the WavefrontObj object which is defined by the files "wavefront.h/.cpp", localized in the samples directory. When I'm compiling my project, I got this error: 1Linking... 1wavefront.obj : error LNK2019: unresolved external symbol "char * __cdecl FindMediaFile(char const *,char *)" (?FindMediaFile@@YAPADPBDPAD@Z) referenced in function "public: void __thiscall WAVEFRONT::InPlaceParser::SetFile(char const *)" (?SetFile@InPlaceParser@WAVEFRONT@@QAEXPBD@Z) 1C:\Users\Nicolas\Documents\GI05\CSED451 - Computer Graphics\ToyFK_Project\Debug\ToyFK_Project.exe : fatal error LNK1120: 1 unresolved externals I guess I forgot to link a library or something but I really can't find what... It's driving me crazy!!! Does somebody have an idea? Thank you

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• .NET Framework - Possible memory-leaky classes?

  - by Robert Fraser

  Just the other day I was investigating a memory leak that was ballooning the app from ~50MB to ~130MB in under two minutes. Turns out that the problem was with the ConcurrentQueue class. Internally, the class stores a linked list of arrays. When an item is dequeued from the ConcurrentQueue, the index in the array is bumped, but the item remains in the array (i.e. it's not set to null). The entire array node is dropped after enough enqueues/dequeues, so it's not technically a leak, but if storing only a few large objects in the ConcurrentQueue, this can get out of hand fast. The documentation makes no note of this danger. I was wondering what other potential memory pitfalls are in the Base Class Library? I know about the Substring one (that is, if you call substring and just hold onto the result, the whole string will still be in memory). Any others you've encountered?

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• Creating a project, from Makefile to static/dynamic libraries in UNIX

  - by Sasha

  Guys, would you describe a few things about c++ building blocks, on unix. I want to create an application that links against static libs and dynamic libs (.so). Question 1: How do I create static library using gcc/g++ ?How do I make my app link against it. Question 2: How to specify it in the makefile, linking against static and dynamic libs, assuming that both libraries have header files Summary: I have been using makefiles and libraries for years, written by someone else. Thus every time I modified it, I simply cut-and-pasted things around, without really understanding it. Now I want to get down to the ground and understand the building/linking/Creating Makfile process in-depth. What is a good book describing these concepts in intimate details? Thanks

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• libriaries on Android

  - by Will

  In native development, you can produce libraries - .so, .dll etc - that other libraries and programs can share. In Java, you can put your code in a JAR in the classpath and other programs and libraries can use it. So how can you do modular programs in Android? I get the impression from the documentation that each APK is a self-contained island. Can different APKs share code? And how does installation work when you have these external dependencies? Can you specify that you rely on library that is not in your APK and get it installed too? If you can't have 'dynamic linking', can you have 'static linking' by developing your shared code and somehow putting the equiv of a JAR into each APK that requires it?

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• Shipping jar with default .properties file configurations

  - by Maxim Veksler

  Hello, I would like to include a default default.properties file in my .jar library. The idea is to allow the user to override my default is he so desires. I'm having trouble getting the classloader to play nicely with this setup, I've tried to look a at popular jars such as log4j, common-* and others and it seems that no one is implementing this idea. Am I going the wrong way? The second best thing is hard coding the values, and using the default if no .properties key has been found, but this sound oh so wrong. Suggestions?

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