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  • How to gather arbitrary length list data in ASP.NET MVC.

    - by C. Ross
    I need to gather a list of items associated with another item from my user in a ASP.NET MVC project. I would like to have a controller action like bellow. [AcceptVerbs(HttpVerbs.Post)] public ActionResult Create(int x, int y, IEnumerable<int> zKeys) { //Do stuff here } How can I setup my form to pass data in this way? If data of this particular form can't be provided, what's the next best way to pass this type of information in ASP.NET MVC?

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  • Win 2008 Server & IIS7: ASP installed but displays 'FILE DOWNLOAD - SECURITY WARNING"

    - by AzC
    Hi Dudes, Installed Win 2008 server and IIS7. Enabled ASP Classic and ASP.NET on it. Can't get any ASP scripts to run e.g. desperate.asp containing following line: <% Response.Write "Hello Love, Fancy a Date?" % It just comes up with a "FILE DOWNLOAD - SECURITY WARNING" panel asking em to download. When I select anything it keeps looping. Found lots fo stuff on internet but nothing working. Also same for other ASP scripts HTML works no problem e.g. a file called reply.html containing: Get lost little boy. We only serve French Fries in Macdonalds Any ideas?

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  • C# 4.0 in a Nutshell, Fourth Edition

    - by outcoldman
    Just became a lucky owner of this book C# IN A NUTSHELL 4th edition. This is a fourth edition of this book’s series. I saw previous third edition of this book, we presented it on one of our events at Yaroslavl State University, but that book was a Russian translated version and published in Russia, this is was bad side of that book – all books at Russia printed on really bad paper. I should say that I didn’t read this book by end, but already I was surprised. Why? Why I heard a lot about Richter CLR via C# (English version of 3rd edition of this book I already have, and this book are waiting my attention), and just a few words about C# IN A NUTSHELL, at least in my sphere. I just listen once about this book at one of the podcast of Alt.Net group, and this words was Richter it is really good book, and C# IN A NUTSHELL it is a good handbook. My opinion is - you should read Richter if you want to develop with .NET. But if you want to develop on .NET with C# you should read C# IN A NUTSHELL too. Read more...

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  • Can you precompile and merge part of an ASP.NET website and then continue development?

    - by michielvoo
    A big part of the web site is precompiled and merged, since it's almost never going to change. The precompiled bits can be replaced in case of updates to the original. I want to continue development of new pages, but when I browse to a new page I get the following error: The file '/Website/Test/Default.aspx' has not been pre-compiled, and cannot be requested. Is there any way around this? Edit: If I remove the precompileApp.config file I get the contents of the marker files when I browse them: This is a marker file generated by the precompilation tool, and should not be deleted!

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  • DevDays ‘00 The Netherlands day #2

    - by erwin21
    Day 2 of DevDays 2010 and again 5 interesting sessions at the World Forum in The Hague. The first session of the today in the big world forum theater was from Scott Hanselman, he gives a lap around .NET 4.0. In his way of presenting he talked about all kind of new features of .NET 4.0 like MEF, threading, parallel processing, changes and additions to the CLR and DLR, WPF and all new language features of .NET 4.0. After a small break it was ready for session 2 from Scott Allen about Tips, Tricks and Optimizations of LINQ. He talked about lazy and deferred executions, the difference between IQueryable and IEnumerable and the two flavors of LINQ syntax. The lunch was again very good prepared and delicious, but after that it was time for session 3 Web Vulnerabilities and Exploits from Alex Thissen. This was no normal session but more like a workshop, we decided what kind of subjects we discussed, the subjects where OWASP, XSS and other injections, validation, encoding. He gave some handy tips and tricks how to prevent such attacks. Session 4 was about the new features of C# 4.0 from Alex van Beek. He talked about Optional- en Named Parameters, Generic Co- en Contra Variance, Dynamic keyword and COM Interop features. He showed how to use them but also when not to use them. The last session of today and also the last session of DevDays 2010 was about WCF Best Practices from Gerben van Loon. He talked about 7 best practices that you must know when you are going to use WCF. With some quick demos he showed the problem and the solution for some common issues. It where two interesting days and next year i sure will be attending again.

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  • What is the state of model driven development in 2012?

    - by eriktheblond
    I haven't heard a lot of talk lately on model driven development, but some of my company's customers are using it. I know briefly what it is, but after trying to refresh my memory using Google I found that most of the information is from 2006-2007. Was it something that never really took off? More worryingly is the reason why the customers are asking: They want IEC 61508 complience. Is this actually a "not-so-good" idea that will live on simply because it is prescribed by a standard? I have too little experience to say if MDD is good idea or not (I'm guessing the right answer starts with "It depends"...), but the reasons for using it, that is standard complience, seems just wrong.

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  • DropDownList and SelectListItem Array Item Updates in MVC

    - by Rick Strahl
    So I ran into an interesting behavior today as I deployed my first MVC 4 app tonight. I have a list form that has a filter drop down that allows selection of categories. This list is static and rarely changes so rather than loading these items from the database each time I load the items once and then cache the actual SelectListItem[] array in a static property. However, when we put the site online tonight we immediately noticed that the drop down list was coming up with pre-set values that randomly changed. Didn't take me long to trace this back to the cached list of SelectListItem[]. Clearly the list was getting updated - apparently through the model binding process in the selection postback. To clarify the scenario here's the drop down list definition in the Razor View:@Html.DropDownListFor(mod => mod.QueryParameters.Category, Model.CategoryList, "All Categories") where Model.CategoryList gets set with:[HttpPost] [CompressContent] public ActionResult List(MessageListViewModel model) { InitializeViewModel(model); busEntry entryBus = new busEntry(); var entries = entryBus.GetEntryList(model.QueryParameters); model.Entries = entries; model.DisplayMode = ApplicationDisplayModes.Standard; model.CategoryList = AppUtils.GetCachedCategoryList(); return View(model); } The AppUtils.GetCachedCategoryList() method gets the cached list or loads the list on the first access. The code to load up the list is housed in a Web utility class. The method looks like this:/// <summary> /// Returns a static category list that is cached /// </summary> /// <returns></returns> public static SelectListItem[] GetCachedCategoryList() { if (_CategoryList != null) return _CategoryList; lock (_SyncLock) { if (_CategoryList != null) return _CategoryList; var catBus = new busCategory(); var categories = catBus.GetCategories().ToList(); // Turn list into a SelectItem list var catList= categories .Select(cat => new SelectListItem() { Text = cat.Name, Value = cat.Id.ToString() }) .ToList(); catList.Insert(0, new SelectListItem() { Value = ((int)SpecialCategories.AllCategoriesButRealEstate).ToString(), Text = "All Categories except Real Estate" }); catList.Insert(1, new SelectListItem() { Value = "-1", Text = "--------------------------------" }); _CategoryList = catList.ToArray(); } return _CategoryList; } private static SelectListItem[] _CategoryList ; This seemed normal enough to me - I've been doing stuff like this forever caching smallish lists in memory to avoid an extra trip to the database. This list is used in various places throughout the application - for the list display and also when adding new items and setting up for notifications etc.. Watch that ModelBinder! However, it turns out that this code is clearly causing a problem. It appears that the model binder on the [HttpPost] method is actually updating the list that's bound to and changing the actual entry item in the list and setting its selected value. If you look at the code above I'm not setting the SelectListItem.Selected value anywhere - the only place this value can get set is through ModelBinding. Sure enough when stepping through the code I see that when an item is selected the actual model - model.CategoryList[x].Selected - reflects that. This is bad on several levels: First it's obviously affecting the application behavior - nobody wants to see their drop down list values jump all over the place randomly. But it's also a problem because the array is getting updated by multiple ASP.NET threads which likely would lead to odd crashes from time to time. Not good! In retrospect the modelbinding behavior makes perfect sense. The actual items and the Selected property is the ModelBinder's way of keeping track of one or more selected values. So while I assumed the list to be read-only, the ModelBinder is actually updating it on a post back producing the rather surprising results. Totally missed this during testing and is another one of those little - "Did you know?" moments. So, is there a way around this? Yes but it's maybe not quite obvious. I can't change the behavior of the ModelBinder, but I can certainly change the way that the list is generated. Rather than returning the cached list, I can return a brand new cloned list from the cached items like this:/// <summary> /// Returns a static category list that is cached /// </summary> /// <returns></returns> public static SelectListItem[] GetCachedCategoryList() { if (_CategoryList != null) { // Have to create new instances via projection // to avoid ModelBinding updates to affect this // globally return _CategoryList .Select(cat => new SelectListItem() { Value = cat.Value, Text = cat.Text }) .ToArray(); } …}  The key is that newly created instances of SelectListItems are returned not just filtered instances of the original list. The key here is 'new instances' so that the ModelBinding updates do not update the actual static instance. The code above uses LINQ and a projection into new SelectListItem instances to create this array of fresh instances. And this code works correctly - no more cross-talk between users. Unfortunately this code is also less efficient - it has to reselect the items and uses extra memory for the new array. Knowing what I know now I probably would have not cached the list and just take the hit to read from the database. If there is even a possibility of thread clashes I'm very wary of creating code like this. But since the method already exists and handles this load in one place this fix was easy enough to put in. Live and learn. It's little things like this that can cause some interesting head scratchers sometimes…© Rick Strahl, West Wind Technologies, 2005-2012Posted in MVC  ASP.NET  .NET   Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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  • The right way to start out in game development/design [closed]

    - by Marco Sacristão
    Greetings everyone I'm a 19 year old student looking for some help in the field of game development. This question may or may not seem a bit overused, but the fact is that game development has been my life long dream, and after several hours of search I've realized that I've been going in circles for the past three or four months whilst doing such research on how to really get down and dirty with game development, therefor I decided to ask you guys if you could help me out at all. Let me start off with some information about me and things i've already learned about GameDev which might help you out on helping me out (wordplay!): I'm not an expert programmer, but I do have knowledge on how to program in several languages including C and Java (Currently learning Java in my degree in Computer Engineering), but my methodology might not be most correct in terms of syntax (hence my difficulty in starting out, i'm afraid that the starting point might not be the most correct, and it would deploy a wrongful development methodology that would be to corrected later on, in terms of game development or other projects). I have yet to work in a project as large as a game, never in my learning curve of programming I've done a project to the scale of a video game, only very small software (PHP Front-ends and Back-ends, with some basic JQuery and CSS knowledge). I'm not the biggest mathematician or physicist, but I already know that is not a problem, because there are several game engines already available for use and integration with home-made projects (Box2D, etc). I've also learned about some libraries that could be included in said projects, to ease out some process in game development, like SDL for example. I do not know how sprites, states, particles or any specific game-related techniques work. With that being said, you can see that I have some ideas on game development, but I have absolutely no clue on how to design and produce a game, or even how game-like mechanics work. It does not have to be a complex game just to start out, I'd rather learn the basic of game design (Like 2D drawing, tiling, object collision) and test that out in a language that I feel comfortable in which could be later on migrated to other platforms, as long that what I've learned is the correct way to do things, and not just something that I've learned from some guy on Youtube by replicating that code on the video. I'm sorry if my question is not in the best format possible, but I've got so many questions on my mind that are still un-answered that I don't know were to start! Thank you for reading.

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  • How do I tell the cases when it's worth to use LINQ?

    - by Lijo
    Many things in LINQ can be accomplished without the library. But for some scenarios, LINQ is most appropriate. Examples are: SELECT - http://stackoverflow.com/questions/11883262/wrapping-list-items-inside-div-in-a-repeater SelectMany, Contains - http://stackoverflow.com/questions/11778979/better-code-pattern-for-checking-existence-of-value Enumerable.Range - http://stackoverflow.com/questions/11780128/scalable-c-sharp-code-for-creating-array-from-config-file WHERE http://stackoverflow.com/questions/13171850/trim-string-if-a-string-ends-with-a-specific-word What factors to take into account when deciding between LINQ and regular .Net language elements?

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  • ASP.NET Export to Excel and Word using VB.NET and C#

    In most ASP.NET web applications there is a need to export data. This is particularly useful if the information will be used for further analysis and archiving purposes offline. This tutorial will illustrate how you can export your data from your ASP.NET webpage example if it is coming from a MSSQL database to one of the most common file export formats in Windows MS Excel and MS Word.... DNS Configured Correctly? Test Your Internal DNS With Our Free DNS Advisor Tool From Infoblox.

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  • Who are good suppliers of .NET 4 Hosted Virtual Private Servers ? (May 2010)

    - by Nick Haslam
    I'm looking for a supplier for hosting a Virtual server, running Windows Server 2008 (R2 ideally) and .NET 4 to run an internet facing ASP.NET web application. I'd also like to be able to remote desktop onto it, and install other apps as necessary, including other websites as and when. I'm based in the UK, so a UK based supplier would be great. I was looking at Fasthosts, but having researched them a bit more, they look like a bad idea.

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  • Mvc4 installer is incompatible with .net 4.5 but .net 4.5 is not installed

    - by jstell
    I'm getting the classic 'mvc4 installer is incompatible with .net 4.5' that many others have gotten except I do not have .Net 4.5 installed on this machine. MVC3 projects getting created just fine. I get this error when running the Web Installer for MVC4 Beta. System setup is VS2010 SP1, Windows 7 64-bit, Resharper is installed as well I am at a loss here and now seem to be just wasting time trying to fix this.

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  • Gridview inside a ModalPopUpExtender causes ModalPopUpExtender to close

    - by harold-sota
    I have a gridview inside a ModalPopUpExtender, the grid view have the button add delete and edit when i clic one of the button of the gridview the popup is closed. I wont to close the popup when the close button is clicked. This is the asp.net part: < cc1: ModalPopupExtender ID="NamePopup" runat="server" PopupControlID="OptionPanel" TargetControlID="btnD" BackgroundCssClass="mpBg" DropShadow="true" OkControlID="btnSavePopup" CancelControlID="btnPostCancel" < / cc1:ModalPopupExtender Any ideas??

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  • Using Server.CreateObject("ADODB.Stream") in IE7

    - by Daud
    I have a asp.net 1.1 application that uses the following code to write out a file in the response: Dim objStream As Object objStream = Server.CreateObject("ADODB.Stream") objStream.open() objStream.type = 1 objStream.loadfromfile(localfile) Response.BinaryWrite(objStream.read) This code is called by a pop up window that displays this file or gives a open/save dialog in Internet explorer. The problem is, that it seems to work fine in IE6 but in IE7 the pop up opens and then closes without displaying the file. Any one know whats wrong?

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  • Application framework building

    - by Muhammad Umar Siddique
    Hi I was looking to build a Data Access Layer for my new web based application, I'm using ASP.NET. I'm want to build a framework not only for this application but also want to utilize it for my future projects. Actually my main aim is to make a framework, from DAC, DAL, BL to GUI. I want suggestions from you guys that what should i adopt, what give me flexibility, which suits for both small and large size applications. Thanks in advance.

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  • What is a good software development plan?

    - by Totophil
    Whilst browsing through answers on SO I came across something that is, in my view, one of the more frequent software development management misconceptions: "[software development] plan is a reasonably detailed description of all the activities you need to undertake". Hence the question: what is good software development plan? Can it be boiled down just to a work breakdown structure; is WBS the single most important thing for a software development plan anyway?

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  • How to break this string and sort on version number

    - by Sean P
    I have an ASP app that has a string array as such (there are much more than this): 7.5.0.17 Date: 05_03_10 7.5.0.18 Date: 05_03_10 7.5.0.19 Date: 05_04_10 7.5.0.2 Date: 02_19_10 7.5.0.20 Date: 05_06_10 7.5.0.3 Date: 02_26_10 7.5.0.4 Date: 03_02_10 7.5.0.5 Date: 03_08_10 7.5.0.6 Date: 03_12_10 7.5.0.7 Date: 03_19_10 7.5.0.8 Date: 03_25_10 7.5.0.9 Date: 03_26_10 7.5.1.0 Date: 05_06_10 How do I go about sorting these string by version descending?

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  • ASP.NET files necessary for development

    - by apollo-creed
    I am just getting started in ASP.NET and have some existing projects to maintain. I have read that ASP.NET projects include a folder called app_data, a code behind DLL, .sln project files, .proj files etc Which of these files are necessary for the continued development of a ASP.NET website? Also, are there others which are key to building ASP.NET applications?

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  • Why isn't Java more widely used for game development?

    - by Anto
    I'm not a game developer or anything, but I know that Java is not very widely used for game development. Java should be fast enough for most games, so where's the catch? I can think of some reasons: Lack of game developers with expertice in Java Lack of good game development frameworks Programmers don't want to accept Java as a games programming language. Most only accept C++ as that? No support for game consoles (though the PC market still exists) It could of course be something else. Could someone who knows the business better than me explain why Java isn't getting momentum when it comes to game development?

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  • .Net search engine architecture and technology choice

    - by shrivb
    I am in the process of designing a search engine for an asp.net site. The site currently uses Microsoft Indexing Server to index and search content which range from simple text files to MS documents to PDFs. MIS is also used to crawl File servers. MIS in tandem with Index Server Companion crawls for content from external sites. I intend to replace MIS with the indexer/crawler I am trying to build. Since my platform is completely on the Microsoft stack, I cant afford to have a Java application server. Thus, Solr, and effectively, SolrNet is ruled out. With this being the context, I have couple of questions. 1.Technology choice I had done my initial investigation and looked at Lucene.Net. There seemed to be 2 issues in using Lucene.Net. First being, it cant crawl external content. There doesn't seem to be a direct port of Nutch in .Net. Second, since it is just an indexer, it cant parse various document types. The parsing is left to the developer. So, what would be best technology choice on the .Net platform to achieve indexing & crawling? Are there any .Net open source libraries available for document parsing? 2.Architectural pattern Is there any general architectural pattern or best practice that needs to be followed in designing such a search engine? Thanks in advance.

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  • Why isn't Java more widely used for game development?

    - by Anto
    I'm not a game developer or anything, but I know that Java is not very widely used for game development. Java should be fast enough for most games, so where's the catch? I can think of some reasons: Lack of game developers with expertice in Java Lack of good game development frameworks Programmers don't want to accept Java as a games programming language. Most only accept C++ as that? No support for game consoles (though the PC market still exists) It could of course be something else. Could someone who knows the business better than me explain why Java isn't getting momentum when it comes to game development?

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  • How do I explain to HR that my work experience is relevant even if it doesn't match the keywords in the job description?

    - by Dmitri
    I am looking at a job with a great company and in a field that I really want to be in. Unfortunalty, what they want is someone with "experience with ASP (VB), T-SQL in a production environment." But I've never done anything except with FOSS tools: C, Ruby(straight and RoR), Perl, MySQL, et c. I'm thinking that I could probably pick up VB without much trouble (I took a class that used it on college, was impressed at how easy it was to construct Windows UIs, but I've never needed it) Is there any way that I can demonstrate that my experience is similar? What would equivalent experience be in the FOSS world?

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