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  • Command Query Separation

    - by Liam McLennan
    Command query separation is a strategy, proposed by Bertrand Meyer, that each of an object’s methods should be either a command or a query. A command is an operation that changes the state of a system, and a query is an operation that returns a value. This is not the same thing as CQRS, hence why I think that CQRS is poorly named. An Example of Command Query Separation Consider a system that models books and shelves. There is a rule that a shelf may not be removed if it holds any books. One way to implement the removal is to write a method Shelf.Remove() that internally checks to make sure that the shelf is empty before removing it. If the shelf is not empty then it is not removed and an error is returned. To implement this feature following the principle of command query separation would require two methods, one to query the shelf and determine if it is empty and a second method to remove the shelf. Separating the query from the command makes the shelf class simpler to use because the state change is clear and explicit.

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  • ArchBeat Link-o-Rama for November 6, 2012

    - by Bob Rhubart
    OAM/OVD JVM Tuning | @FusionSecExpert Vinay from the Oracle Fusion Middleware Architecture Group (the infamous A-Team) shares a process for analyzing and improving performance in Oracle Virtual Directory and Oracle Access Manager. Architects Matter: Making sense of the people who make sense of enterprise IT Why do architects matter? Oracle Enterprise Architect Eric Stephens suggests that you ask yourself that question the next time you take the elevator to the Oracle offices on the 45th floor of the Willis Tower in Chicago, Illinois (or any other skyscraper, for that matter). If you had to take the stairs to get to those offices, who would you blame? "You get the picture," he says. "Architecture is essential for any necessarily complex structure, be it a building or an enterprise." (Read the article...) SOA Galore: New Books for Technical Eyes Only Shake up up your technical skills with this trio of new technical books from community members covering SOA and BPM. Thought for the Day "It goes against the grain of modern education to teach students to program. What fun is there to making plans, acquiring discipline, organizing thoughts, devoting attention to detail, and learning to be self critical?" — Alan Perlis (April 1, 1922 – February 7, 1990) Source: SoftwareQuotes.com

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  • Where can I learn about managing domain names for my websites? [closed]

    - by Shahbaz
    [I originally asked this question on serverfault.com, where it was closed as 'out of scope.' Hopefully it is appropriate for this forum] I am a developer who doesn't understand how to effectively manage Internet domain names. Say I registered a name with namecheap and host a website on linode. Now what is an a-record? What is a name server and do I host it with namecheap of linode? Why would I pay amazon when others are free? Does any of this matter in terms of website latency or reliability? I feel like a script kiddy, copying and pasting others' and hoping it works. Is there a book or other resource that explains all this? I know amazon is full of books about DNS, but afaik they are about setting up DNA servers for local networks, not the Internet. p.s. To emphasize, I'm asking for books or long write-ups which explain this to technically competent people, who just haven't had to think about the role of commercial registrars, name servers, commercial hosts, commercial websites and how all parts play together on the real internet (not local networks).

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  • Over 300 "NetBeans Platform for Beginners" Sold

    - by Geertjan
    I've noticed that the authors of "NetBeans Platform for Beginners" have started exposing the number of sales they have achieved. Below, notice the '304' (which will probably change quite quickly) at the lower left end of this screenshot: That's pretty good since the book has only existed for a few months and developers tend to share books they buy in PDF format. That probably means there are 300 teams of software developers around the world who are using the book, which is pretty awesome. (Though it would help the authors significantly, I'm sure, if individual developers on teams would buy the book, rather than sharing one between them. Come on, let's support these great authors so that they'll write more books like this.) Also note that there is a set of reviewer comments on the page above: Plus, the book is updated at the end of each month, so it continues to grow and improve from month to month, for free for everyone who has bought it. If you've read the book and want to contribute a review like the above, contact walternyland @ yahoo dot com. Great work, guys! For anyone out there who hasn't got it yet: https://leanpub.com/nbp4beginners

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  • Advice and resources on collaborative environments

    - by Tjaart
    I need some advice on collaborative software environments. More specifically, I am looking for books and reference materials that can aid me in understanding team and code structures and the interactions thereof. In other words books, blogs or white papers explaining: Different strategies for structuring teams that share common code between each other but have distinct individual functions? To summarise my question I would like to know what would be a good source of knowledge if I were to set up teams in an organisation that shared code but each unit still remained autonomous. I have done some research on this subject and explored: code review tools, distributed VCS, continuous integration tools, Unit testing automation. The tough part about implementing these tools are to determine where a good place would be to start, which tools are low hanging fruit, which tools or methods provide higher success rates. If someone asks me about code quality reference I point them to Code Complete. I am looking for an equivalent guide on software team structures and tools to make this equation work better. I realise that this question is quite vague but it arose as "we need to share code between teams without breaking each others stuff and causing management headaches and reams of red tape" The answer is definitely not simple and requires changes on many levels, hence the question. If the question is too vague please vote to close or delete. I would accept any good starting point as an answer.

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  • I don't understand how TDD helps me get a good design if I need a design to start testing it

    - by Michael Stum
    I'm trying to wrap my head around TDD, specifically the development part. I've looked at some books, but the ones I found mainly tackle the testing part - the History of NUnit, why testing is good, Red/Green/Refactor and how to create a String Calculator. Good stuff, but that's "just" Unit Testing, not TDD. Specifically, I don't understand how TDD helps me get a good design if I need a Design to start testing it. To illustrate, imagine these 3 requirements: A catalog needs to have a list of products The catalog should remember which products a user viewed Users should be able to search for a product At this points, many books pull a magic rabbit out of a hat and just dive into "Testing the ProductService", but they don't explain how they came to the conclusion that there is a ProductService in the first place. That is the "Development" part in TDD that I'm trying to understand. There needs to be an existing design, but stuff outside of entity-services (that is: There is a Product, so there should be a ProductService) is nowhere to be found (e.g., the second requirement requires me to have some concept of a User, but where would I put the functionality to remind? And is Search a feature of the ProductService or a separate SearchService? How would I know which I should choose?) According to SOLID, I would need a UserService, but if I design a system without TDD, I might end up with a whole bunch of Single-Method Services. Isn't TDD intended to make me discover my design in the first place? I'm a .net developer, but Java resources would also work. I feel that there doesn't seem to be a real sample application or book that deals with a real line of business application. Can someone provide a clear example that illustrates the process of creating a design using TDD?

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  • Update 3 for "NetBeans Platform for Beginners"

    - by Geertjan
    The latest monthly update of NetBeans Platform for Beginners was released during the last few days. Without any question at all, this book is awesome. I love how it is a 'living book' and that on a monthly basis new updates are made available. In this particular update, as before, reader comments and questions have led to changes and enhancements in the book. In addition, there's now a tighter integration between the long list of samples on GitHub and the book, since wherever a sample relates to a text in the book, the book has a handy icon, so that you know when to hop over to GitHub to get a related sample. Do you have comments or questions about the book? That's what the feedback link is for: https://leanpub.com/nbp4beginners/feedback And there's also a free sample, just in case you'd like to get a feel for the book prior to buying it: http://samples.leanpub.com/nbp4beginners-sample.pdf If you're from a company where you're all sharing a single copy of the book, it would be great if you'd go back and support this great project (and hopefully encourage future books being written) by buying additional copies, ideally one for each developer. Let's show the authors that writing books on the NetBeans Platform is a really profitable thing to do (and I'm hoping they'll write one on Maven and the NetBeans Platform, as well)!

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  • How can I go about learning to write a shader

    - by Donutz
    So here's the background: I'm writing a game, just for my own amusement and education really. I've already come to the conclusion that XNA was the way to go for graphics, I've bought a couple of books, I've gotten basic game graphics going, and that's great. Now I'm starting to get a little in-depth and I'm starting to need to do stuff not covered in my (beginner) books. In particular, I need to display a sprite using a mask. Actually, what I need to do is display a generic sprite with a different color for each player. After banging around on the web, it seems the way to go is to have a color texture (one for each player) which I display using the mask, then display the generic part of the sprite. This has to be done dynamically, i.e. at runtime because there are too many sprites to keep in memory if I try to generate all the permutations at startup. So, I need to use a shader. Fine. I've downloaded a sample shader program, and managed to hit it with a hammer until it does something close enough to what I want so that I know I'm on the right track. And here, we come to my problem... I have no friggin' clue what I'm doing. While there are a lot of samples and such about shaders, no one ever actually explains what's going on. For instance, I can't find any real docs on Tex2D. I feel like the guys in Zoolander poking at the computer. So, my question (yes, I have a question) -- where is a good URL or what is a good book to take me from dumskie to reasonably competent to write a basic shader?

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  • Can I eventually consider myself a professional developer if I don't have a CS degree? [on hold]

    - by heltonbiker
    Question first, context later: If I am a dedicated, self-taught programmer, always seeking top-quality books AND READING THEM, while successfully applying all that new knowledge into my current work, could I call myself (and offer my work as) a PROFESSIONAL developer? How limiting (or how common) that is nowadays? I am afraid that, no matter how hard I study and practice, it could be too difficult to compete with "actual", college graduated developers, and potential employers might have doubts investing in an "undergraduated" person. Now, context: My former profession is from healthcare sector, then I studied mechanical engineering (quit in the middle), then I studied product design (master degree), and I ended up working (very happily) at an engineering company that manufactures medical devices. For more than two years now my main activity in this company is software development. The devices contain software, and we gave up hiring software development (domain knowledge needed, too much communication cost). My current company sees a lot of value in what I do, but I cannot afford the risk of depending on this single company for the rest of my life, you get it. But a lot of job offers require some minimal formal education, usually a CS degree. Fact is that I am sure this is my target profession, I don't plan to go to another area, it is a pleasure to dive into books that normal people would consider unreadable, but I'm 36 years old and can't see going back to college as a viable alternative.

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  • Recommended display/background brightness ratio and UI color schemes [duplicate]

    - by user1306322
    This question already has an answer here: Colour scheme for editor - guidelines or medical reccomendations 3 answers I'm a professional programmer, which means I spend a lot of time staring at various displays. Recently I've been having some problems with my eyes, so I went to talk to several doctors, which all gave me different recommendations as to how bright the background of the room should be in comparison to the display's brightness. It was very confusing, as some of them even agreed with counter-arguments of others, which made it all even less clear. So I'd like to ask the professional programmers, as people who actually have some experience with that. Some of the doctors said that looking at a monitor is like looking at a book, so the brightness ratios should be approximately the same. Others said that background should be as bright as the display itself, because then there is no brightness difference at the edges, and that's what may cause eye fatigue. From my own experience, I can say that reading a book isn't the same as writing or debugging a program, where you have to pay close attention to each symbol, and in books most words are easily recognizable without focusing too hard on them. Also, books are black on white and I myself use the default (dark text, white bg) color scheme for my IDE, but I've seen some programmers use mid-bright text on very dark background color schemes. So I'd like to ask what are the recommended display/background brightness ratios for programming? I'm not sure this site is the right one for this kind of questions, so if you know a better one, please comment.

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  • Problem with understanding how to start

    - by Coolface
    Okay, this might be a little off-topic but i try anyway. Sorry to bother. So i'm working as sysadmin for at least 5 years now and i quite enjoy IT field in general. Somehow i was never interested in programming much but always want to learn something at least easy and for personal usage. As sysadmin i need scripting skills so learn shell scripting without much problems, i also try to learn pascal, delphi, basic over time and must recent was python. Well, my problem is when i try to learn programming i just can't apply what i learn from the books to the real word. What i mean is i understand there are data structures, algorithms, variables, lib's, if-then logic, etc. but i just can't understand how to apply this things when i want to do real things. Like i want to get a something simple as parse web page, i draw a quick algorithm like get a web page, find a word on it and write a to file, on the paper everything look simple but when i get to the coding i just stuck pretty much from the start. I try read code of the real programs that just totally confusing especially big parts with many classes so i'm just quickly lost a trail what this code do. I think i just lack some fundamentals to see a big picture but don't really know what this might be? Or maybe i just don't have a passion to programming at all... My best bet was a shell scripting so i have really no problems to write complex scripts but this just not enough. Recently i was read around 5 or 6 python books because everyone say it's so easy even kid can code something but still no much luck, python is good and easy but i can't make something harder then a prodecurial style code like in bash for easy things but when i want harder things i'm still stuck. In college i was also not a math and tech guy and like to study non-tech stuff mostly like economy, psychology maybe that my problem? Anyway any advice would be greatly appriciated.

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  • WPF MVVM Trigger Animation on MainWindow close

    - by Scott
    I'm using trying to implement MVVM in my app. I have a MainWindow.xaml and a MainWindowViewModel. I'm in the process of removing all of the code-behind code from the MainWindow.xaml but I'm stuck on one final piece. In my pre-MVVM setup I started an animation in the MainWindow.xaml.cs that would fade out the form before closing it. Since Closing is not a RoutedEvent, I had to use code-behind to get this to work. My VM has the following two properties that can be bound: ClosingWindow and CloseWindow. My goal was to bind a DataTrigger in my MainWindowStyle to the ClosingWindow property of the VM. When ClosingWindow was set to True, it would start an animation using the following XAML: <DataTrigger Binding="{Binding ClosingWindow}" Value="True"> <DataTrigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="Opacity" From="1" To="0" Duration="0:0:2"/> </Storyboard> </BeginStoryboard> </DataTrigger.EnterActions> </DataTrigger> Somehow (insert magic here) I was going to set CloseWindow on the VM, via Binding, to True when the animation completed, which would then use an AttachedBehavior to Close the Window. The AttachedBehavior works perfectly when I just set CloseWindow directly using the following XAML: <DataTrigger Binding="{Binding CloseWindow}" Value="True"> <Setter Property="ab:WindowCloseBehavior.Close" Value="True"/> </DataTrigger> ...but I want to reproduce the form fade before the form actually closes. So there are two issues that I've run into: First, the animation doesn't work. I enter the trigger correctly (I've taken out the animation and put a Setter statement in there that changes the Title of the MainWindow to "Closing" and it changes correctly when ClosingWindow = True) but the DoubleAnimation never does anything. Second, there's no way to set the value of CloseWindow once the animation is complete. I looked at Marlon Grech's animation code but that won't work on DataTriggers. I can't publish a RoutedEvent because my VM doesn't descend from UIElement, and I've been Googling all day trying to come up with a clever, MVVM-friendly way to do this with no luck. So any ideas why that animation doesn't do anything? And more importantly, how would you solve the entire problem of animating a form fade on close from the VM? I don't doubt that my entire solution to this problem might be whacked so I'm open to just about anything.

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  • Could not determine metatable error binding list to asp.net datagridview

    - by Scott Vercuski
    I am working with the following block of code ... List<ThemeObject> themeList = (from theme in database.Themes join image in database.DBImages on theme.imageID equals image.imageID into resultSet from item in resultSet select new ThemeObject { Name = theme.Name, ImageID = item.imageID}).ToList(); dgvGridView.DataSource = themeList; dgvGridView.DataBind(); The list object populates fine. The datagrid is setup with 2 columns. A textbox column for the "Name" which is bound to "Name" An image column which is bound to the "ImageID" field When I execute the code I receive the following error on the DataBind() Could not determine a MetaTable. A MetaTable could not be determined for the data source '' and one could not be inferred from the request URL. Make sure that the table is mapped to the dats source, or that the data source is configured with a valid context type and table name, or that the request is part of a registered DynamicDataRoute. I'm not using any dynamicdataroutes as far as I can tell. Has anyone experienced this error before?

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  • How do I get Lucene (.NET) to highlight correctly with wildcards?

    - by Scott Stafford
    I am using the Lucene.NET API directly in my ASP.NET/C# web application. When I search using a wildcard, like "fuc*", the highlighter doesn't highlight anything, but when I search for the whole word, like "fuchsia", it highlights fine. Does Lucene have the ability to highlight using the same logic it used to match with? Various maybe-relevant code-snippets below: var formatter = new Lucene.Net.Highlight.SimpleHTMLFormatter( "<span class='srhilite'>", "</span>"); var fragmenter = new Lucene.Net.Highlight.SimpleFragmenter(100); var scorer = new Lucene.Net.Highlight.QueryScorer(query); var highlighter = new Lucene.Net.Highlight.Highlighter(formatter, scorer); highlighter.SetTextFragmenter(fragmenter); and then on each hit... string description = Server.HtmlEncode(doc.Get("Description")); var stream = analyzer.TokenStream("Description", new System.IO.StringReader(description)); string highlighted_text = highlighter.GetBestFragments( stream, description, 1, "..."); And I'm using the QueryParser and the StandardAnalyzer.

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  • Need help understanding WPF MeasureOverride and ArrangeOverride infinity and 0 sizes

    - by Scott Bilas
    I'm trying to build a simple panel that contains one child and will snap it to nearest grid sizes. I'm having a hard time figuring out how to do this by overriding MeasureOverride and ArrangeOverride. Here's what I'm after: I want my panel to tell its owner that (a) it wants to be as large as possible, then (b) when it finds out what that size is, it will size itself and its child UIElement according to the nearest smaller snap point. So if we're snapping to 10's, and I can be in a region no bigger than 192x184, the panel will tell its parent container "my actual size is going to be 190x180". That way anything bordering my control will be able to align to its edges, as opposed to the potential space. When I put my panel inside of a Grid, I get either 0 or PositiveInfinity (I forget) for the incoming size in the overrides, but what I need to know is "how big can my space actually get?" not infinities.. Part of the problem I think is what WPF considers magic values of PositiveInfinity and 0 for size. I need a way to say, via MeasureOverride "I can be as big as you will allow me" and in ArrangeOverride to actually size to the snapped size. Or am I going about this the completely wrong way? Measuring and arranging looks very complicated, just from wandering around a little in the code for the standard panels in Reflector.

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  • Redirect WinForms web browser Control pop ups to another WinForms web browser control with form data

    - by Scott Chantry
    I have a c# web browser and one of the pages it displays has a form. When the form is submitted it posts data to a new window in IE. I want to catch that data and forward it to another C# web browser that I have in my application. So I don't want it to open an IE browser when the javascript function window.open is called, I want it to open it in the 2nd browser window.

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  • LoaderLock was detected, and turning off the warning does not help

    - by Scott M.
    I am trying to write an application that takes in sound from the default audio recording device on a computer. When running any code that accesses DirectX from my managed code i get this error: DLL 'C:\Windows\assembly\GAC\Microsoft.DirectX.DirectSound\1.0.2902.0__31bf3856ad364e35\Microsoft.DirectX.DirectSound.dll' is attempting managed execution inside OS Loader lock. Do not attempt to run managed code inside a DllMain or image initialization function since doing so can cause the application to hang. DevicesCollection coll = new DevicesCollection(); and Device d = new Device(DSoundHelper.DefaultCaptureDevice); and Capture c = new Capture(DSoundHelper.DefaultCaptureDevice); all cause the LoaderLock MDA to pop up and tell me there is a problem. I have scoured the internet (stackoverflow included) for solutions to this problem, but most people just say to turn off the warning, which does not work. When I turn off the warning, a generic ApplicationException is thrown, which is even less useful. I have seen the answers to this question as well, which didn't help because he said to remove the code that is causing the error. Others have said "fix your code." My questions are: how can I call any (preferably managed) DirectX code from C# without getting this error?

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  • Send mail via gmail with PowerShell V2's Send-MailMessage

    - by Scott Weinstein
    I'm trying to figure out how to use PowerShell V2's Send-MailMessage with gmail. Here's what I have so far. $ss = new-object Security.SecureString foreach ($ch in "password".ToCharArray()) { $ss.AppendChar($ch) } $cred = new-object Management.Automation.PSCredential "[email protected]", $ss Send-MailMessage -SmtpServer smtp.gmail.com -UseSsl -Credential $cred -Body... I get the following error Send-MailMessage : The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at At foo.ps1:18 char:21 + Send-MailMessage <<<< ` + CategoryInfo : InvalidOperation: (System.Net.Mail.SmtpClient:SmtpClient) [Send-MailMessage], SmtpException + FullyQualifiedErrorId : SmtpException,Microsoft.PowerShell.Commands.SendMailMessage Am I doing something wrong, or is Send-MailMessage not fully baked yet (I'm on CTP 3)? Edit - two additional restrictions I want this to be non-interactive, so get-credential won't work The user account isn't on the gmail domain, but an google apps registered domain

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  • Canon EDSDK 2.8 (Xcode 3.2.2 - Snow Leopard 10.6.3)

    - by Scott Langendyk
    I'm trying to build an application using the Canon EDSDK 2.8. I created a new Cocoa Application project in Xcode, and imported the headers and framework files. When I try to build and run (without writing any code), I get two warnings that say the frameworks are missing x86_64 architecture files. If I try and import the "EDSDK.h" header file, I end up with about 100 miscellaneous errors. I've tried changing the architecture to i386, however when I try and build and run, I get a debugger error that says "Cannot access memory at address 0x0". The odd thing is that I can get the example applications bundled with the SDK to compile and run without issues, Anyone have any ideas as to why this is happening?

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  • Android GPS timeout

    - by Scott Saunders
    I'm writing an Android application that, among other things, needs to send the current GPS coordinates to a server when the user tells it to. From a context menu, I run the service below. The service is a LocationListener and requests updates from the LocationManager. When it gets a location (onLocationChanged()), it removes itself as a listener and sends the coordinates off to the server. All of this is working. However, if GPS coordinates are not quickly available, my service just keeps running until it gets some. It holds up the UI with a progress dialog, which is annoying. Worse, if the user has moved since starting the service, the first GPS coordinates might be wrong and the app will send bad data to the server. I need a timeout on the service. Is there a good way to do that? I'm not very experienced with threads. I think I can run a Runnable in the onStartCommand() method that will somehow count down 30 seconds and then, if there is no GPS result yet, call my service's stop() method. Does that sound like the best way to do this? Alternatively, is it possible to tell if the GPS cannot get a fix? How would I go about doing that? Edit: To further clarify, I'm looking for the best way to "give up" on getting a Location after some amount of time. public class AddCurrentLocation extends Service implements LocationListener { Application app; LocationManager mLocManager; ProgressDialog mDialog; @Override public int onStartCommand(Intent intent, int arg0, int arg1) { app = getApplication(); // show progress dialog if (app.getScreen() != null) { mDialog = ProgressDialog.show(app.getScreen(), "", "Adding Location. Please wait...", true); } // find GPS service and start listening Criteria criteria = new Criteria(); criteria.setAccuracy(Criteria.ACCURACY_FINE); mLocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); String bestProvider = mLocManager.getBestProvider(criteria, true); mLocManager.requestLocationUpdates(bestProvider, 2000, 0, this); return START_NOT_STICKY; } private void stop() { mLocManager.removeUpdates(this); if (mDialog != null) { mDialog.dismiss(); } stopSelf(); } @Override public void onLocationChanged(Location location) { // done with GPS stop listening mLocManager.removeUpdates(this); sendLocation(location); // method to send info to server stop(); } // other required methods and sendLocation() ... }

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  • How do I use AutofacWebTypesModule to Resolve HttpServerUtilityBase

    - by Scott Weinstein
    I have the following registrations builder.RegisterModule(new AutofacWebTypesModule()); builder.Register<MyType>(ctx => { var server = ctx.Resolve<HttpServerUtilityBase>(); ... }); When I try to resolve MyType via a constructor on an Controller, I get the following exception. What am I doing wrong? Autofac.Core.DependencyResolutionException was unhandled by user code Message=No scope matching the expression 'value(Autofac.Builder.RegistrationBuilder`3+<c__DisplayClass0[System.Web.HttpServerUtilityBase,Autofac.Builder.SimpleActivatorData,Autofac.Builder.SingleRegistrationStyle]).lifetimeScopeTag.Equals(scope.Tag)' is visible from the scope in which the instance was requested.

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  • In my WCF service with IXmlSerializable class, I get ArrayOfXElement[] instead of ObservableCollecti

    - by Scott
    I have an existing class (I didn't write) that implements IXmlSerializable. I decided to create a WCF service so my Silverlight application could access this class. I return the class as List. In the generated proxy, instead of an ObservableCollection like I'm expecting, I get ArrayOfXElement[]. If I remove the IXmlSerializable attribute, I get an the ObservableCollection. I don't quite understand what is happening, but I just want my SL app to receive an ObservableCollection. Is my only choice to create a DTO class and send back a list of those? Any advice?

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  • How does [self.tableView reloadData] know what data to reload?

    - by Scott Pendleton
    It bugs me to death that my viewcontroller, which happens to be a tableViewController, knows without being told that its property that is an NSArray or an NSDictionary holds the data that is to be loaded into the table for display. Seems like I should explicitly say something like: [self.tableView useData:self.MyArray]; Because, THAT'S WHAT I WANT TO DO! I want to have more than one array inside my tableViewController, and switch between one and the other programmatically. Please do not give me an answer like: "Never mind what you want to do, just set up two different tableViewControllers." No. I want to do it my way. I notice that when a tableViewController makes use of a searchViewController, you can do this: if (tableView == self.searchDisplayController.searchResultsTableView) { YES! I have even been able to do this: self.tableView = self.searchDisplayController.searchResultsTableView; [self.tableView reloadData]; But nowhere can I find how to set self.tableView back to the main datasource! I'm so tired of sifting, sifting through code for incomplete nuggets of enlightenment. Allow me to understate that Apple's documentation is grossly inadequate. It's astounding that so many slick iPhone programs came to be created. People said that once I went Mac, I'd never go back to Windows. Well, I'm anything but a convert.

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  • How to set properties of a d:DesignInstance in XAML?

    - by Scott Bilas
    I'm using the new d:DesignInstance feature of the 4.0 series WPF tools. Works great! Only issue I'm having is: how can I set properties on the instance? Given something like this: <Grid d:DataContext="{d:DesignInstance plugin:SamplePendingChangesViewModel, IsDesignTimeCreatable=True}"/> How can I set properties on the viewmodel, aside from setting them in its default ctor or routing it through some other object initializer? I gave this a try but VS gives errors on compile "d:DataContext was not found": <Grid> <d:DataContext> <d:DesignInstance IsDesignTimeCreatable="True"> <plugin:SamplePendingChangesViewModel ActiveTagIndex="2"/> </d:DesignInstance> </d:DataContext> For the moment I'm going back to using a resource and 'd:DataContext={StaticResource SampleData}', where I can set the properties in the resource. Is there a way to do it via a d:DesignInstance?

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