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  • How do I combine similar method calls into a delegate pattern?

    - by Daniel T.
    I have three methods: public void Save<T>(T entity) { using (new Transaction()) { Session.Save(entity); } } public void Create<T>(T entity) { using (new Transaction()) { Session.Create(entity); } } public void Delete<T>(T entity) { using (new Transaction()) { Session.Delete(entity); } } As you can see, the only thing that differs is the method call inside the using block. How can I rewrite this so it's something like this instead: public void Save<T>(T entity) { TransactionWrapper(Session.Save(entity)); } public void Create<T>(T entity) { TransactionWrapper(Session.Create(entity)); } public void Save<T>(T entity) { TransactionWrapper(Session.Save(entity)); } So in other words, I pass a method call as a parameter, and the TransactionWrapper method wraps a transaction around the method call.

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  • Using C# to iterate form fields with same name

    - by itsatrp
    I have a section of a form that I need to handle differently from the rest of form results. In the section that needs special handling I need to iterate over 3 form fields that have the same name. They have to have the same name, I can't change it. The section of the form I am referring to looks something like this: <td><input name="Color" size="20" value="" type="text"></td> Using C# I try something like this: I try to handle it like this: int i; for (i = 1; i <= Request.Form["Color"][i]; i++) { colorName.Text += Request.Form["Color"]; } Which leads to the following exception: System.NullReferenceException: Object reference not set to an instance of an object. How should I be handling form fields with the same name?

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  • How to know when the MPMoviePlayerController has been paused in iPhone?

    - by iPhoney
    I want to add an overlay view for my video when the video is paused by the user. Is there any way to get the pause notification from MPMoviePlayerController? According to Apple Doc, there should be ways to do this but I can't find which notification should I use for this purpose. Quote: In addition to being notified when playback finishes, interested clients can be notified in the following situations: -When the movie player begins playing, is paused, or begins seeking forward ... For more information, see the Notifications section in this reference.

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  • Would it be simply better to use the system's functions rather than use the language?

    - by Nullw0rm
    There are many scenarios where I've questioned PHP's performance with some of its functions, and whether I should build a complex class to handle specific things using its seemingly slow tools. For example, Complex regular expressions with sed and processing with awk would seemingly be exponential in performance rather than making PHP's regular expression and seemingly excessive functions parse and in time manage to finish it. If I were to do a lot of network tasks such as MX lookups/DIGging/retrieving simultaneously I would rather pass it via system() and let the OS handle it itself. There are simply too many functions in PHP, that are inefficient and result in slow pages or can be handled easier by the OS. What are your opinions? Do you think I should do the hard work with the OS in its own/custom functions?

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  • PHP - white screen of death!

    - by Industrial
    Hi everyone, After debugging a codeigniter app that were installed into a new development environment, I have started to freak out when seeing white screens with nothing more available. I have been able to solve each and every one of the errors that have caused this, but it have taken seriously way too long time. PHP error_reporting(E_ALL) & display_errors", 1 is set as well. I even installed Xdebug in hope of getting more output, but no. My logging settings are also working, but nothing is written to the log. Is there a way to get something informative printed out instead of a complete white screen? It would certainly shorten my time spent on solving the eventual errors that causes this? Thanks a lot! Reference: http://stackoverflow.com/questions/2149321/why-does-code-igniter-give-me-a-white-page

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  • What's a good way to throw and handle events in PHP?

    - by techexpert
    Hi everyone, I am just trying to get a general idea about the event prcessing mechanism in PHP5 in as neat way as possible. First of all I understand that a PHP application is not exactly a persistent type, so the events may not make a lot of sense, but from the OO perspective it might be a very elegant way to "communicate" between the objects. So I am thinking that it would make sense to separate the events on the external events, such as $_POST & $_GET and the internal ones, i.e. function callbacks. As far as the external ones, is it a good idea to process the $_GETs and $_POSTs directly, or is it better to wrap them into an event of some sort? Also, in order to process the internal events, do you have to pass the reference to the event handler/dispatcher to each class so they know how to throw them? I was thinking to use the PEAR EventDispatcher to do the work, but I am open to other suggestions. Thank you!

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  • Write a dll that is accessable from VS 2003 VC++ code

    - by John
    I need to be able to write a DLL in either C# or VC++ that is accessible from code that is written in Visual Studio 2003 VC++. It looks like the code is unmanaged (uses * for pointers) VC++ and this DLL needs to be able to drop right in and be accessed by the current code. The DLL is an RS232 driver that needs to be able to return an int for an error code and pass back, by reference, some measured values, to the calling program. Will I even be able to write this in C#? If not, I only have access to Visual Studio 2005 or 2008. Will I be able to write my code in either, and will that DLL be able to be called from the current code base? Or do I have to go looking on ebay for a copy of VS 2003?

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  • Maven workspace resolution horked

    - by user237815
    I'm using m2eclipse to manage maven projects. Somehow I did a bad thing, and now the system is behaving as if workspace resolution is disabled. I have several projects that depend on a main project. This project has a version of 4.0-SNAPSHOT, and all the dependent projects reference it in the dependencies section of their poms. Everything was working fine until I created an entirely new project and mistakenly copied the pom from the main project into the new project. Suddenly, all of the dependent projects got the error: "The container 'Maven Dependencies" references non existing library C:\users\myusername.m2\com\mydomain\myproject\4.0-SNAPSHOT\myproject-4.0-SNAPSHOT.jar I zapped the offending new project, but the error remains for all the dependent projects. I've made no changes (to my knowledge) in the main project or any of the dependent projects, so I'm guessing something got changed in the Eclipse environment. Does m2eclipse or Maven itself maintain settings anywhere that I can blow away?

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  • Reuse C++ Header files

    - by Amrish
    Guys, I have a Visual C++ solution with 2 projects AlgorithmA & AlgorithmB and both share a common header file RunAlgo.h with the class declaration. Each project in the solution has its own unique implementation for the header file. I am trying to compile a DLL out of the common header file RunAlgo.h and add reference to this DLL in the projects AlgorithmA & AlgorithmB. I have then included separate RunAlgo.cpp definition file in both my projects. The problem is that I am getting linker errors while compiling the new DLL project which has only the header file. So, the question is Can a header file with only class declaration be compiled into a DLL (Similar to class library containing an Interface in C#)? For the above scenario, is there a better approach to reuse the common Header file among projects? Should the above method work (re-check my code?)

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  • Operating System Widget Side Project

    - by Calpis
    I want to start on a side project and here's my idea: Whenever the user's mouse is pressed down, I want a small ring around the cursor to show up. I'm mainly doing this to learn more about programming and get myself to think outside of work related materials. My questions are: 1) is there a good source I can reference to start a project that deals with something like this? 2) Is visual studio a sufficient software to create such an application? Or would I need some other tool to do this. 3) What language should I choose to do this task? Thanks in advance!

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  • Google checkout - Order processing notification handler

    - by Kunal
    Hi I need to integrate google checkout on my website. I have successfully implemented the order placing and others stuff and using the sandbox I have tested that users can successfully add items to cart and and pay thereafter. I am using my own customized shopping cart written in php mysql. The last thing I need to do is pass the new order id to google checkout and receive notifications with the new order id as well as other data google sends. I know I have to setup a path to the handler script in my accounts. I did it in my sandbox account as well. But can't find a simple pice of code to get it done. Even if I use sample code from google, just cant figure out the format of the returned data in new order notification and also how to send custom data to the cart, which would come back with new order notifications? I am just lost on this. Please help!

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  • Give users permissions on item in other list

    - by Nomz
    Hello everyone, This is what im working on: i have two lists, first one: collumn user and collumn project that the user is assigend to. second one (library): a list of all the projects I was wondering, how, by every row that is created in the first list (so adding a user and a project) it is possible to grant the user permissions on this project's reference in the second library (the projects library). Example: ProjectLibrary: Project1 Project2 Project3 the first list: user1 project1 user1 project2 user2 project2 user2 project3 user3 project3 now i want to give each user permission to see the project he's assigned to so that when he opens a third form, a combobox filled with projects will only show the projects he has permissions on. thank you so much!

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  • Passing values across pages ASP.net

    - by GigaPr
    Hi i need to pass a long list of Ids from one page to another, i was thinking of using querystring but taking in consideration that the number of ids to be passed may reach 300 i think is not a good idea. an option from my understanding may be the use of session, this seems to me an optimal solution in my case but on the other hand I can certainly clear the session when the user performs a certain action and the list of ids is not longer needed, but if the user leaves the page without performing any action i want to clear the session, how can i do it? If multiple users are using the same functionality do i need the session's items to be confused or the session is for a single user? I am working in asp.net c# Thanks

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  • Visual Studio 2008 compiles anything in C++ file?

    - by Brad Pepers
    I noticed today that a source code file in a project was compiling even though it had junk at the top of it. It got me wondering what all would pass without error through the compiler. Here is an example of code that will not generate any error messages: what kind of weird behaviour is this??? #include "stdafx.h" // what is up? int foo(int bar) { bla bla bla????? return bar; } and more junk??? What in the world is the compiler doing to allow this code to compile without giving any error messages? I'm using Visual Studio 2008 and this is unmanaged C++ code. The foo function isn't actually generated in the object file so it can't be used but why no errors???

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  • Why can't I read session variables

    - by Marty Goetz
    I have a c# .net web application. I create session variables but when I try to read them after I leave the page that they were created from I can't. Created on page 1 Session["UserName"] = "WhatEver"; Then I do Response.Redirect("~/whatever.aspx"); and try to read to read the session variable in the Page_Load method of the new page string userName = Session["UserName"].ToString(); I receive "Object reference not set to an instance of an object." Why am I receiving this error and what can I do to fix the problem? I would greatly appreciate any help anyone can give me.

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  • Passing a variable to javascript via a link.

    - by Jon
    My website has a javascript variable (addselectedsubdivision) that loads a neighborhood name from a box on the left to a box on the right. I was hoping I could build a link and then us PHP to add the subdivision letter, neighborhood, and city so that when you click on the link it goes right to this page and loads the neighborhood name in the box on the right. However, I can't get the variable to pass to the new page. Any suggestions? Website: http://www.mlsfinder.com/va_rein/jonmcachran/index.cfm?primarySearchType=sold&searchType=subdivision&so=a&domain=www.jonsellsvb.com&subdivision_string=p Example link: <a href="http://www.mlsfinder.com/va_rein/jonmcachran/index.cfm?primarySearchType=sold&searchType=subdivision&so=a&domain=www.jonsellsvb.com&subdivision_string=$firstletter" onLoad="addselectedsubdivision($neighborhood||$city);" target="_blank">

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  • Jetspeed null PortletDefinition

    - by heeboir
    Hello, I am running a jetspeed portal which contains various portlet applications and have come across an issue after a recent reinstall where some of the portlets will return Cannot pass a null PortletDefinition to a PortletEntity Any idea what is causing this issue? I investigated a bit and it seems that jetspeed runs a process when new portlets are added where it creates mappings in its DB (derby in my case). If this does not complete it seems to cause this problem. Is my assumption correct? If yes, how can I restart this process? Many thanks

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  • VB.NET - cannot get Video Preview to work

    - by Yiu Korochko
    Hi, Overflow. I have an application which is supposed to convert a video via DirectShowSource. I have a checkbox which enables a button called "btnviewcrop" which shows a new form called crp.vb for cropping/shearing pixels off the video. Now, I have a Panel1 that I want to set as the owner (the video drawing surface) but when I set it to open, the application crashes (Error: Object reference not set to an instance of an object.) and I do not understand how to fix it. Here is my button code: Imports Microsoft.DirectX.AudioVideoPlayback Private Sub btnviewcrop_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnviewcrop.Click Me.ShowInTaskbar = False Me.Enabled = False crp.Show() Dim cropperv As Video cropperv.Owner = crp.preview cropperv.FromFile(labinputfile.Text, True) cropperv.Play() End Sub

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  • Spring & Hibernate SessionFactory - recovery from a down server

    - by MJB
    So pre spring, we used version of HibernateUtil that cached the SessionFactory instance if a successful raw JDBC connection was made, and threw SQLException otherwise. This allowed us to recover from initial setup of the SessionFactory being "bad" due to authentication or server connection issues. We moved to Spring and wired things in a more or less classic way with the LocalSessionFactoryBean, the C3P0 datasource, and various dao classes which have the SessionFactory injected. Now, if the SQL server appears to not be up when the web app runs, the web app never recovers. All access to the dao methods blow up because a null sessionfactory gets injected. (once the sessionfactory is made properly, the connection pool mostly handles the up/down status of the sql server fine, so recovery is possible) Now, the dao methods are wired by default to be singletons, and we could change them to prototype. I don't think that will fix the matter though - I believe the LocalSessionFactoryBean is now "stuck" and caches the null reference (I haven't tested this yet, though, I'll shamefully admit). This has to be an issue that concerns people.

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  • C# - Copy dlls to the exe output directory when using dependency injection with no references?

    - by NotDan
    I have a C# solution that I am using dependency injection to resolve references between dlls. I have an exe project and some other dll projects that are not referenced by the exe (It uses the dlls through the IoC container). The project settings are the default, visual studio settings where it builds each dll in it's own folder. Since the exe doesn't reference the dlls, they never get copied to the output directory of the exe and don't get found by the IoC framework. How do you handle this? Do you build them all in the same directory? Use post build copy commands? Or something else?

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  • iPhone programming guideline : List / detail / modify

    - by Oliver
    Hello, I have a program that displays a list (a TableView). When the user clicks an item, it's detail is shown. On the detail view, the user can ask to modify it so a modify window is shown. Here, the user can ask to delete the item. I would like at this time return to the list with the item deleted from the list and from the data source. There may be thousands of methods to do this, but I wonder which is the best / good one. Could you help me, and/or give me a good reference to read about this ? Thank you.

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  • Suggested C++ books?

    - by Josh Bradley
    Ok, I've had one semester of C++ and will be taking a second semester in it after I have taken a Data Structure class this fall. In the first class, we dealt mainly with C++ syntax and the textbook we used was ok, but now I'm wanting to go ahead and purchase a great C++ book that encompasses a lot of the programming concepts used today. I'm learning Objective-C on my own and was able to get through the whole object-oriented stuff pretty easily, along with other things like pointers, inheritance, delegation, etc. It doesn't have to exactly have EVERYTHING in it, but I do want to buy the book with the most information in it. Money is no problem. So my question is what book did you use or still use for C++? Is it a book that you can reference back to if you ever forget how to do something small, or would you have to go online and find the answer.

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  • design patterns for hierarchical structures

    - by JLBarros
    Anyone knows some design patterns for hierarchical structures? For example, to manage inventory categories, accounting chart of accounts, divisions of human resources, etc.. Thank you very much in advance EDIT: Thanks for your interest. I am looking for a better way of dealing with hierarchical items to which they should apply operations depending on the level of hierarchy. I have been studying the patterns by Martin Fowler, for example Accounting, but I wonder if there are other more generic. The problem is that operations apply to the items must be possible to change even at run time and may depend on other external variables. I thought of a kind of strategy pattern but would like to combine it with the fact that it is a hierarchical scheme. I would appreciate any reference to hierarchical patterns and you'll take care of them in depth.

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  • How to implement/debug a sensor driver in ANDROID

    - by CVS-2600Hertz-wordpress-com
    Does anyone know of a walk-through or any examples of any code to setup sensors in android. I have the drivers available to me. Also i have implemented the sensors library as instructed in the Android-Reference along the sensors.h template. I am still unable to get any response at the apps level. How do i trace this issue? what might be the problem? Thanks in advance UPDATE: Jorgesys's link below points to a great APP to test if the sensor drivers are functioning properly or not. Not that i know they are not functioning, Any ideas of on where to dig??...

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  • mysql php connection problem in windows 7

    - by air
    i install windows7 ultimate and php 5.3.1 and mysql server 5.1 mysql server work fine from mysql> and if see phpinfo(); i get the following table mysql MySQL Support enabled Active Persistent Links 0 Active Links 0 Client API version mysqlnd 5.0.5-dev - 081106 - $Revision: 289630 $ Persistent cache enabled put_hits 0 put_misses 0 get_hits 0 get_misses 0 size 2000 free_items 2000 references 2 but when i connect with following php command $db_host="localhost"; $db_name="mysql"; $db_user="root"; $db_pass="*****"; $dbc=mysql_connect($db_host,$db_user,$db_pass) OR DIE (mysql_error()); $dbs=mysql_select_db($db_name) OR DIE (mysql_error()); when i run page, page take long time in loading and then return nothing. and if i pass any query it return false, i think its connection problem. Thanks

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