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  • UIButtons display differently on UIImageView when created at design time vs. run time

    - by PRITISH
    I have added some UIButton objects into .xib file, and some UIButton objects with the code. But now I am facing one problem. While Zooming the UIImageView the UIButtons that are added through code are shown on the UIImageView and those that are added with .xib file are below the UIImageView. Code for UIButtons added with code: btnBrightness = UIButton.FromType (UIButtonType.RoundedRect); btnBrightness.Frame = new RectangleF (540, 20, 95, 37); btnBrightness.SetTitle ("Brightness", UIControlState.Normal); More details: monotouch

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  • c++: at what point should I start using "new char[N]" vs a static buffer "char[Nmax]"

    - by dan
    My question is with regard to C++ Suppose I write a function to return a list of items to the caller. Each item has 2 logical fields: 1) an int ID, and 2) some data whose size may vary, let's say from 4 bytes up to 16Kbytes. So my question is whether to use a data structure like: struct item { int field1; char field2[MAX_LEN]; OR, rather, to allocate field2 from the heap, and require the caller to destroy when he's done: struct item{ int field1; char *field2; // new char[N] -- destroy[] when done! Since the max size of field #2 is large, is makes sense that this would be allocated from the heap, right? So once I know the size N, I call field2 = new char[N], and populate it. Now, is this horribly inefficient? Is it worse in cases where N is always small, i.e. suppose I have 10000 items that have N=4?

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  • Show different product image in new.phtml vs. list

    - by user1907662
    $collection = $this->_addProductAttributesAndPrices($collection) ->addStoreFilter() ->addAttributeToFilter('is_discontinued', array('neq' => 1) ) ->addAttributeToFilter('collection_id', array('neq' => 'LKG') ) ->addAttributeToFilter('media_gallery_label', array('eq' => 'Home Page Image') ) //->addAttributeToSort('entity_id', 'desc') ->addAttributeToSort('news_from_date', 'desc') For the media_gallery_label field, I need to be able to filter by any gallery images, and if the label of any of the images is "Home Page Image", it needs to display instead of the default "small" image. I need this to work only in new.phtml file, and not in the list.phtml.

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  • MySQL VIEW vs. embedded query, which one is faster?

    - by Vincenzo
    I'm going to optimize a MySQL embedded query with a view, but I'm not sure whether it will give an effect: SELECT id FROM (SELECT * FROM t); I want to convert it to: CREATE VIEW v AS SELECT * FROM t; SELECT id FROM v; I've heard about "indexed views" in SQL Server, but I'm not sure about MySQL. Any help would be appreciated. Thanks!

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  • C++ Primer vs. Thinking in C++?

    - by Oszkar
    I've worked with C++ in the last few years but never went through a book covering all the basics. I've recently read Effective C++, but I feel it would be very important for me to read a more fundamental book as well. Which one would be more recommended? C++ Primer or Thinking in C++?

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  • How to get VS or Xcode warning with something like "x = x++"?

    - by Jim Buck
    In the spirit of undefined behavior associated with sequence points such as “x = ++x” is it really undefined?, how does one get the compiler to complain about such code? Specifically, I am using Visual Studio 2010 and Xcode 4.3.1, the latter for an OSX app, and neither warned me about this. I even cranked up the warnings on VS2010 to "all", and it happily compiled this. (For the record, VS2010's version added 1 to the variable where Xcode's version kept the variable unchanged.)

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  • Java vs. C variant for desktop and tablet development

    - by MirroredFate
    I am going to write a desktop application, but I am conflicted concerning which language to use. It (the desktop application) will need to have a good GUI, and to be extendable (hopefully good with modules of some sort). It must be completely cross-platform, including executable in various tablet environments. I put this as a requirement while realizing that some modification will no doubt be necessary. The language should also have some form of networking tools available. I have read http://introcs.cs.princeton.edu/java/faq/c2java.html and understand the differences between Java and C very well. I am looking not necessarily at C, but more at a C variant. If it is a complete toss-up, I will use Java as I know Java much better. However, I do not want to use a language that will be inferior for the task I wish to accomplish. Thank you for all suggestions and explanations. NOTE: If this is not the correct stack for this question, I apologize. It seemed appropriate according to the rules.

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  • Calendar add() vs roll() when do we use it?

    - by Pentium10
    I know add() adds the specified (signed) amount of time to the given time field, based on the calendar's rules. And roll() adds the specified (signed) single unit of time on the given time field without changing larger fields. I can't think of an everyday usage of roll() I would do everything by add(). Can you help me out with examples when do we use roll() and when add()?

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  • usb mouse/keyboard doesn't work with 3.11.0-12-generic kernel

    - by x-yuri
    I can't use my usb keyboard/mouse after upgrade from raring to saucy. The keyboard works in grub menu and if I boot with the previous kernel version (3.8.0-31-generic). My new kernel version is 3.11.0-12-generic. I've got Mad Catz R.A.T.7 wired USB mouse, Canyon CNL-MBMSO02 wired usb mouse and Logitech diNovo Edge wireless keyboard, connected to computer through Logitech Unifying Receiver. Using PS/2 keyboard I've managed to get some information. dmesg says: [ 0.166273] ACPI: bus type USB registered [ 0.166273] usbcore: registered new interface driver usbfs [ 0.166273] usbcore: registered new interface driver hub [ 0.166273] usbcore: registered new device driver usb ... [ 3.534226] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 3.534228] ehci-pci: EHCI PCI platform driver [ 3.534291] ehci-pci 0000:00:1a.7: setting latency timer to 64 [ 3.534299] ehci-pci 0000:00:1a.7: EHCI Host Controller [ 3.534304] ehci-pci 0000:00:1a.7: new USB bus registered, assigned bus number 1 [ 3.534315] ehci-pci 0000:00:1a.7: debug port 1 [ 3.538218] ehci-pci 0000:00:1a.7: cache line size of 64 is not supported [ 3.538231] ehci-pci 0000:00:1a.7: irq 18, io mem 0xd3325400 [ 3.548017] ehci-pci 0000:00:1a.7: USB 2.0 started, EHCI 1.00 [ 3.548042] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 [ 3.548045] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.548048] usb usb1: Product: EHCI Host Controller [ 3.548050] usb usb1: Manufacturer: Linux 3.11.0-12-generic ehci_hcd [ 3.548053] usb usb1: SerialNumber: 0000:00:1a.7 [ 3.548155] hub 1-0:1.0: USB hub found [ 3.548159] hub 1-0:1.0: 6 ports detected [ 3.548311] ehci-pci 0000:00:1d.7: setting latency timer to 64 [ 3.548319] ehci-pci 0000:00:1d.7: EHCI Host Controller [ 3.548323] ehci-pci 0000:00:1d.7: new USB bus registered, assigned bus number 2 [ 3.548333] ehci-pci 0000:00:1d.7: debug port 1 [ 3.552228] ehci-pci 0000:00:1d.7: cache line size of 64 is not supported [ 3.552239] ehci-pci 0000:00:1d.7: irq 23, io mem 0xd3325000 [ 3.564014] ehci-pci 0000:00:1d.7: USB 2.0 started, EHCI 1.00 [ 3.564044] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002 [ 3.564047] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.564050] usb usb2: Product: EHCI Host Controller [ 3.564052] usb usb2: Manufacturer: Linux 3.11.0-12-generic ehci_hcd [ 3.564056] usb usb2: SerialNumber: 0000:00:1d.7 [ 3.564163] hub 2-0:1.0: USB hub found [ 3.564167] hub 2-0:1.0: 6 ports detected [ 3.564274] ehci-platform: EHCI generic platform driver [ 3.564280] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 3.564281] ohci-platform: OHCI generic platform driver [ 3.564287] uhci_hcd: USB Universal Host Controller Interface driver [ 3.564345] uhci_hcd 0000:00:1a.0: setting latency timer to 64 [ 3.564347] uhci_hcd 0000:00:1a.0: UHCI Host Controller [ 3.564352] uhci_hcd 0000:00:1a.0: new USB bus registered, assigned bus number 3 [ 3.564378] uhci_hcd 0000:00:1a.0: irq 16, io base 0x0000f0c0 [ 3.564402] usb usb3: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.564404] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.564406] usb usb3: Product: UHCI Host Controller [ 3.564408] usb usb3: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.564410] usb usb3: SerialNumber: 0000:00:1a.0 [ 3.564478] hub 3-0:1.0: USB hub found [ 3.564482] hub 3-0:1.0: 2 ports detected [ 3.564589] uhci_hcd 0000:00:1a.1: setting latency timer to 64 [ 3.564592] uhci_hcd 0000:00:1a.1: UHCI Host Controller [ 3.564597] uhci_hcd 0000:00:1a.1: new USB bus registered, assigned bus number 4 [ 3.564623] uhci_hcd 0000:00:1a.1: irq 21, io base 0x0000f0a0 [ 3.564647] usb usb4: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.564649] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.564651] usb usb4: Product: UHCI Host Controller [ 3.564653] usb usb4: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.564654] usb usb4: SerialNumber: 0000:00:1a.1 [ 3.564727] hub 4-0:1.0: USB hub found [ 3.564730] hub 4-0:1.0: 2 ports detected [ 3.564834] uhci_hcd 0000:00:1a.2: setting latency timer to 64 [ 3.564837] uhci_hcd 0000:00:1a.2: UHCI Host Controller [ 3.564843] uhci_hcd 0000:00:1a.2: new USB bus registered, assigned bus number 5 [ 3.564863] uhci_hcd 0000:00:1a.2: irq 18, io base 0x0000f080 [ 3.564885] usb usb5: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.564887] usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.564889] usb usb5: Product: UHCI Host Controller [ 3.564891] usb usb5: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.564892] usb usb5: SerialNumber: 0000:00:1a.2 [ 3.564962] hub 5-0:1.0: USB hub found [ 3.564966] hub 5-0:1.0: 2 ports detected [ 3.565073] uhci_hcd 0000:00:1d.0: setting latency timer to 64 [ 3.565076] uhci_hcd 0000:00:1d.0: UHCI Host Controller [ 3.565081] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 6 [ 3.565101] uhci_hcd 0000:00:1d.0: irq 23, io base 0x0000f060 [ 3.565124] usb usb6: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.565127] usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.565128] usb usb6: Product: UHCI Host Controller [ 3.565130] usb usb6: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.565132] usb usb6: SerialNumber: 0000:00:1d.0 [ 3.565195] hub 6-0:1.0: USB hub found [ 3.565198] hub 6-0:1.0: 2 ports detected [ 3.565303] uhci_hcd 0000:00:1d.1: setting latency timer to 64 [ 3.565306] uhci_hcd 0000:00:1d.1: UHCI Host Controller [ 3.565310] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 7 [ 3.565329] uhci_hcd 0000:00:1d.1: irq 19, io base 0x0000f040 [ 3.565352] usb usb7: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.565354] usb usb7: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.565356] usb usb7: Product: UHCI Host Controller [ 3.565358] usb usb7: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.565359] usb usb7: SerialNumber: 0000:00:1d.1 [ 3.565424] hub 7-0:1.0: USB hub found [ 3.565427] hub 7-0:1.0: 2 ports detected [ 3.565534] uhci_hcd 0000:00:1d.2: setting latency timer to 64 [ 3.565537] uhci_hcd 0000:00:1d.2: UHCI Host Controller [ 3.565541] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 8 [ 3.565560] uhci_hcd 0000:00:1d.2: irq 18, io base 0x0000f020 [ 3.565584] usb usb8: New USB device found, idVendor=1d6b, idProduct=0001 [ 3.565587] usb usb8: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.565588] usb usb8: Product: UHCI Host Controller [ 3.565590] usb usb8: Manufacturer: Linux 3.11.0-12-generic uhci_hcd [ 3.565592] usb usb8: SerialNumber: 0000:00:1d.2 [ 3.565658] hub 8-0:1.0: USB hub found [ 3.565661] hub 8-0:1.0: 2 ports detected ... [ 4.120014] usb 2-3: new high-speed USB device number 2 using ehci-pci ... [ 4.468908] usb 2-3: New USB device found, idVendor=046d, idProduct=0825 [ 4.468912] usb 2-3: New USB device strings: Mfr=0, Product=0, SerialNumber=2 [ 4.468914] usb 2-3: SerialNumber: AF582E10 ... [ 5.284019] usb 5-2: new full-speed USB device number 2 using uhci_hcd [ 5.465903] usb 5-2: New USB device found, idVendor=046d, idProduct=0b04 [ 5.465908] usb 5-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 5.465911] usb 5-2: Product: Logitech BT Mini-Receiver [ 5.465914] usb 5-2: Manufacturer: Logitech [ 5.468948] hub 5-2:1.0: USB hub found [ 5.470898] hub 5-2:1.0: 3 ports detected [ 5.476096] Switched to clocksource tsc [ 5.712099] usb 7-2: new full-speed USB device number 2 using uhci_hcd [ 5.896366] usb 7-2: New USB device found, idVendor=046d, idProduct=c52b [ 5.896370] usb 7-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 5.896372] usb 7-2: Product: USB Receiver [ 5.896374] usb 7-2: Manufacturer: Logitech [ 6.140016] usb 8-1: new full-speed USB device number 2 using uhci_hcd [ 6.324597] usb 8-1: New USB device found, idVendor=0738, idProduct=1708 [ 6.324603] usb 8-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 6.324605] usb 8-1: Product: Mad Catz R.A.T.7 Mouse [ 6.324608] usb 8-1: Manufacturer: Mad Catz [ 6.564012] usb 8-2: new low-speed USB device number 3 using uhci_hcd [ 6.746602] usb 8-2: New USB device found, idVendor=1d57, idProduct=0010 [ 6.746608] usb 8-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 6.746610] usb 8-2: Product: usb mouse with wheel [ 6.746613] usb 8-2: Manufacturer: HID-Compliant Mouse [ 7.337898] usb 5-2.2: new full-speed USB device number 3 using uhci_hcd [ 7.490902] usb 5-2.2: New USB device found, idVendor=046d, idProduct=c713 [ 7.490907] usb 5-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 7.490910] usb 5-2.2: Product: Logitech BT Mini-Receiver [ 7.490913] usb 5-2.2: Manufacturer: Logitech [ 7.490915] usb 5-2.2: SerialNumber: 001F203BD6A7 [ 7.569898] usb 5-2.3: new full-speed USB device number 4 using uhci_hcd [ 7.722901] usb 5-2.3: New USB device found, idVendor=046d, idProduct=c714 [ 7.722906] usb 5-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 7.722909] usb 5-2.3: Product: Logitech BT Mini-Receiver [ 7.722911] usb 5-2.3: Manufacturer: Logitech [ 7.722913] usb 5-2.3: SerialNumber: 001F203BD6A7 lsusb (more output): Bus 002 Device 002: ID 046d:0825 Logitech, Inc. Webcam C270 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 008 Device 003: ID 1d57:0010 Xenta Bus 008 Device 002: ID 0738:1708 Mad Catz, Inc. Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 004: ID 046d:c714 Logitech, Inc. diNovo Edge Keyboard Bus 005 Device 003: ID 046d:c713 Logitech, Inc. Bus 005 Device 002: ID 046d:0b04 Logitech, Inc. Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub More background. Before that I had a problem with logging in to GNOME. During which I upgraded all the packages at one point (apt-get upgrade) and it stopped booting at all (it didn't get to login screen). Then I fixed PATH issue and now I've got this usb-not-working issue. I tried reinstalling kernel, to no effect. Is there anything else I can do to fix or diagnose the problem?

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  • Announcing ASP.NET MVC 3 (Release Candidate 2)

    - by ScottGu
    Earlier today the ASP.NET team shipped the final release candidate (RC2) for ASP.NET MVC 3.  You can download and install it here. Almost there… Today’s RC2 release is the near-final release of ASP.NET MVC 3, and is a true “release candidate” in that we are hoping to not make any more code changes with it.  We are publishing it today so that people can do final testing with it, let us know if they find any last minute “showstoppers”, and start updating their apps to use it.  We will officially ship the final ASP.NET MVC 3 “RTM” build in January. Works with both VS 2010 and VS 2010 SP1 Beta Today’s ASP.NET MVC 3 RC2 release works with both the shipping version of Visual Studio 2010 / Visual Web Developer 2010 Express, as well as the newly released VS 2010 SP1 Beta.  This means that you do not need to install VS 2010 SP1 (or the SP1 beta) in order to use ASP.NET MVC 3.  It works just fine with the shipping Visual Studio 2010.  I’ll do a blog post next week, though, about some of the nice additional feature goodies that come with VS 2010 SP1 (including IIS Express and SQL CE support within VS) which make the dev experience for both ASP.NET Web Forms and ASP.NET MVC even better. Bugs and Perf Fixes Today’s ASP.NET MVC 3 RC2 build contains many bug fixes and performance optimizations.  Our latest performance tests indicate that ASP.NET MVC 3 is now faster than ASP.NET MVC 2, and that existing ASP.NET MVC applications will experience a slight performance increase when updated to run using ASP.NET MVC 3. Final Tweaks and Fit-N-Finish In addition to bug fixes and performance optimizations, today’s RC2 build contains a number of last-minute feature tweaks and “fit-n-finish” changes for the new ASP.NET MVC 3 features.  The feedback and suggestions we’ve received during the public previews has been invaluable in guiding these final tweaks, and we really appreciate people’s support in sending this feedback our way.  Below is a short-list of some of the feature changes/tweaks made between last month’s ASP.NET MVC 3 RC release and today’s ASP.NET MVC 3 RC2 release: jQuery updates and addition of jQuery UI The default ASP.NET MVC 3 project templates have been updated to include jQuery 1.4.4 and jQuery Validation 1.7.  We are also excited to announce today that we are including jQuery UI within our default ASP.NET project templates going forward.  jQuery UI provides a powerful set of additional UI widgets and capabilities.  It will be added by default to your project’s \scripts folder when you create new ASP.NET MVC 3 projects. Improved View Scaffolding The T4 templates used for scaffolding views with the Add-View dialog now generates views that use Html.EditorFor instead of helpers such as Html.TextBoxFor. This change enables you to optionally annotate models with metadata (using data annotation attributes) to better customize the output of your UI at runtime. The Add View scaffolding also supports improved detection and usage of primary key information on models (including support for naming conventions like ID, ProductID, etc).  For example: the Add View dialog box uses this information to ensure that the primary key value is not scaffold as an editable form field, and that links between views are auto-generated correctly with primary key information. The default Edit and Create templates also now include references to the jQuery scripts needed for client validation.  Scaffold form views now support client-side validation by default (no extra steps required).  Client-side validation with ASP.NET MVC 3 is also done using an unobtrusive javascript approach – making pages fast and clean. [ControllerSessionState] –> [SessionState] ASP.NET MVC 3 adds support for session-less controllers.  With the initial RC you used a [ControllerSessionState] attribute to specify this.  We shortened this in RC2 to just be [SessionState]: Note that in addition to turning off session state, you can also set it to be read-only (which is useful for webfarm scenarios where you are reading but not updating session state on a particular request). [SkipRequestValidation] –> [AllowHtml] ASP.NET MVC includes built-in support to protect against HTML and Cross-Site Script Injection Attacks, and will throw an error by default if someone tries to post HTML content as input.  Developers need to explicitly indicate that this is allowed (and that they’ve hopefully built their app to securely support it) in order to enable it. With ASP.NET MVC 3, we are also now supporting a new attribute that you can apply to properties of models/viewmodels to indicate that HTML input is enabled, which enables much more granular protection in a DRY way.  In last month’s RC release this attribute was named [SkipRequestValidation].  With RC2 we renamed it to [AllowHtml] to make it more intuitive: Setting the above [AllowHtml] attribute on a model/viewmodel will cause ASP.NET MVC 3 to turn off HTML injection protection when model binding just that property. Html.Raw() helper method The new Razor view engine introduced with ASP.NET MVC 3 automatically HTML encodes output by default.  This helps provide an additional level of protection against HTML and Script injection attacks. With RC2 we are adding a Html.Raw() helper method that you can use to explicitly indicate that you do not want to HTML encode your output, and instead want to render the content “as-is”: ViewModel/View –> ViewBag ASP.NET MVC has (since V1) supported a ViewData[] dictionary within Controllers and Views that enables developers to pass information from a Controller to a View in a late-bound way.  This approach can be used instead of, or in combination with, a strongly-typed model class.  The below code demonstrates a common use case – where a strongly typed Product model is passed to the view in addition to two late-bound variables via the ViewData[] dictionary: With ASP.NET MVC 3 we are introducing a new API that takes advantage of the dynamic type support within .NET 4 to set/retrieve these values.  It allows you to use standard “dot” notation to specify any number of additional variables to be passed, and does not require that you create a strongly-typed class to do so.  With earlier previews of ASP.NET MVC 3 we exposed this API using a dynamic property called “ViewModel” on the Controller base class, and with a dynamic property called “View” within view templates.  A lot of people found the fact that there were two different names confusing, and several also said that using the name ViewModel was confusing in this context – since often you create strongly-typed ViewModel classes in ASP.NET MVC, and they do not use this API.  With RC2 we are exposing a dynamic property that has the same name – ViewBag – within both Controllers and Views.  It is a dynamic collection that allows you to pass additional bits of data from your controller to your view template to help generate a response.  Below is an example of how we could use it to pass a time-stamp message as well as a list of all categories to our view template: Below is an example of how our view template (which is strongly-typed to expect a Product class as its model) can use the two extra bits of information we passed in our ViewBag to generate the response.  In particular, notice how we are using the list of categories passed in the dynamic ViewBag collection to generate a dropdownlist of friendly category names to help set the CategoryID property of our Product object.  The above Controller/View combination will then generate an HTML response like below.    Output Caching Improvements ASP.NET MVC 3’s output caching system no longer requires you to specify a VaryByParam property when declaring an [OutputCache] attribute on a Controller action method.  MVC3 now automatically varies the output cached entries when you have explicit parameters on your action method – allowing you to cleanly enable output caching on actions using code like below: In addition to supporting full page output caching, ASP.NET MVC 3 also supports partial-page caching – which allows you to cache a region of output and re-use it across multiple requests or controllers.  The [OutputCache] behavior for partial-page caching was updated with RC2 so that sub-content cached entries are varied based on input parameters as opposed to the URL structure of the top-level request – which makes caching scenarios both easier and more powerful than the behavior in the previous RC. @model declaration does not add whitespace In earlier previews, the strongly-typed @model declaration at the top of a Razor view added a blank line to the rendered HTML output. This has been fixed so that the declaration does not introduce whitespace. Changed "Html.ValidationMessage" Method to Display the First Useful Error Message The behavior of the Html.ValidationMessage() helper was updated to show the first useful error message instead of simply displaying the first error. During model binding, the ModelState dictionary can be populated from multiple sources with error messages about the property, including from the model itself (if it implements IValidatableObject), from validation attributes applied to the property, and from exceptions thrown while the property is being accessed. When the Html.ValidationMessage() method displays a validation message, it now skips model-state entries that include an exception, because these are generally not intended for the end user. Instead, the method looks for the first validation message that is not associated with an exception and displays that message. If no such message is found, it defaults to a generic error message that is associated with the first exception. RemoteAttribute “Fields” -> “AdditionalFields” ASP.NET MVC 3 includes built-in remote validation support with its validation infrastructure.  This means that the client-side validation script library used by ASP.NET MVC 3 can automatically call back to controllers you expose on the server to determine whether an input element is indeed valid as the user is editing the form (allowing you to provide real-time validation updates). You can accomplish this by decorating a model/viewmodel property with a [Remote] attribute that specifies the controller/action that should be invoked to remotely validate it.  With the RC this attribute had a “Fields” property that could be used to specify additional input elements that should be sent from the client to the server to help with the validation logic.  To improve the clarity of what this property does we have renamed it to “AdditionalFields” with today’s RC2 release. ViewResult.Model and ViewResult.ViewBag Properties The ViewResult class now exposes both a “Model” and “ViewBag” property off of it.  This makes it easier to unit test Controllers that return views, and avoids you having to access the Model via the ViewResult.ViewData.Model property. Installation Notes You can download and install the ASP.NET MVC 3 RC2 build here.  It can be installed on top of the previous ASP.NET MVC 3 RC release (it should just replace the bits as part of its setup). The one component that will not be updated by the above setup (if you already have it installed) is the NuGet Package Manager.  If you already have NuGet installed, please go to the Visual Studio Extensions Manager (via the Tools –> Extensions menu option) and click on the “Updates” tab.  You should see NuGet listed there – please click the “Update” button next to it to have VS update the extension to today’s release. If you do not have NuGet installed (and did not install the ASP.NET MVC RC build), then NuGet will be installed as part of your ASP.NET MVC 3 setup, and you do not need to take any additional steps to make it work. Summary We are really close to the final ASP.NET MVC 3 release, and will deliver the final “RTM” build of it next month.  It has been only a little over 7 months since ASP.NET MVC 2 shipped, and I’m pretty amazed by the huge number of new features, improvements, and refinements that the team has been able to add with this release (Razor, Unobtrusive JavaScript, NuGet, Dependency Injection, Output Caching, and a lot, lot more).  I’ll be doing a number of blog posts over the next few weeks talking about many of them in more depth. Hope this helps, Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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  • Why can I not get a WDS-originated PXE boot to progress past the first file download?

    - by Jeff Shattock
    I'm trying to work out an automated Windows install process, and thought I'd give WDS a look. After some promising initial progress, I seem to have hit a wall. I imported the boot and install WIMs, and created the capture WIM successfully. However, whenever I try to PXE boot the reference machine against the WDS server, it kinda craps out. It finds the server and downloads WDSNBP.COM successfully, and then gives the message "TFTP download failed." According to WireShark, the only communication between the WDS box and the client box is the successful TFTP request and download of boot\x86\WDSNBP.COM. No further requests are sent. The WDS log on the server shows the same thing, one successful download and no more activity. I've tried every combination of the following, with exactly zero change in behaviour: Win Server 2008R2 vs 2012 vs 2012R2 WDS virtualized on KVM, ESXi, VirtualBox, VMWare Workstation Client virtualized on KVM, ESXi, VirtualBox, VMWare Workstation Every network adaptor type offered by the virtualization platforms. "Actual" network vs isolated, virtual network. MS DHCP server vs Linux isc-dhcp-server Joined to a domain vs Stand-alone I tried changing the boot filename in DHCP to pxeboot.com instead, and it has no problem downloading that file instead, but it then crabs about Boot\BCD being corrupted. Also, with 2012, it doesnt appear that WDSNBP.com does the architecture detection, or at least does'nt report that it did. 2008 reports that it found x64, and then errors. I find myself out of things to check, and I dont see anything immediately wrong. Where do I go from here? WDS server is at 192.168.1.50, DHCP/DNS at 192.168.1.7. Console of the client computer after the boot: MAC: 52:54:00:28:94:0E UUID: blah blah Searching for server (DHCP)..... Me: 192.168.1.155, DHCP: 192.168.1.7, Gateway 192.168.1.1 Loading 192.168.1.50:boot\x86\wdsnbp.com ...(PXE).................done Downloaded WDSNCP... TFPT download failed Interesting parts of /etc/dhcp/dhcpd.conf on the Linux DHCP server: allow booting; allow bootp; option option-60 code 60 = string; option option-66 code 66 = string; option option-67 code 67 = string; subnet 192.168.1.0 netmask 255.255.255.0 { range 192.168.1.110 192.168.1.253; next-server 192.168.1.50; option tftp-server-name "192.168.1.50"; option option-60 "PXEClient"; filename "boot\\x86\\wdsnbp.com"; option bootfile-name "boot\\x86\\wdsnbp.com"; }

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  • ASP.NET MVC 2 Released

    - by ScottGu
    I’m happy to announce that the final release of ASP.NET MVC 2 is now available for VS 2008/Visual Web Developer 2008 Express with ASP.NET 3.5.  You can download and install it from the following locations: Download ASP.NET MVC 2 using the Microsoft Web Platform Installer Download ASP.NET MVC 2 from the Download Center The final release of VS 2010 and Visual Web Developer 2010 will have ASP.NET MVC 2 built-in – so you won’t need an additional install in order to use ASP.NET MVC 2 with them.  ASP.NET MVC 2 We shipped ASP.NET MVC 1 a little less than a year ago.  Since then, almost 1 million developers have downloaded and used the final release, and its popularity has steadily grown month over month. ASP.NET MVC 2 is the next significant update of ASP.NET MVC. It is a compatible update to ASP.NET MVC 1 – so all the knowledge, skills, code, and extensions you already have with ASP.NET MVC continue to work and apply going forward. Like the first release, we are also shipping the source code for ASP.NET MVC 2 under an OSI-compliant open-source license. ASP.NET MVC 2 can be installed side-by-side with ASP.NET MVC 1 (meaning you can have some apps built with V1 and others built with V2 on the same machine).  We have instructions on how to update your existing ASP.NET MVC 1 apps to use ASP.NET MVC 2 using VS 2008 here.  Note that VS 2010 has an automated upgrade wizard that can automatically migrate your existing ASP.NET MVC 1 applications to ASP.NET MVC 2 for you. ASP.NET MVC 2 Features ASP.NET MVC 2 adds a bunch of new capabilities and features.  I’ve started a blog series about some of the new features, and will be covering them in more depth in the weeks ahead.  Some of the new features and capabilities include: New Strongly Typed HTML Helpers Enhanced Model Validation support across both server and client Auto-Scaffold UI Helpers with Template Customization Support for splitting up large applications into “Areas” Asynchronous Controllers support that enables long running tasks in parallel Support for rendering sub-sections of a page/site using Html.RenderAction Lots of new helper functions, utilities, and API enhancements Improved Visual Studio tooling support You can learn more about these features in the “What’s New in ASP.NET MVC 2” document on the www.asp.net/mvc web-site.  We are going to be posting a lot of new tutorials and videos shortly on www.asp.net/mvc that cover all the features in ASP.NET MVC 2 release.  We will also post an updated end-to-end tutorial built entirely with ASP.NET MVC 2 (much like the NerdDinner tutorial that I wrote that covers ASP.NET MVC 1).  Summary The ASP.NET MVC team delivered regular V2 preview releases over the last year to get feedback on the feature set.  I’d like to say a big thank you to everyone who tried out the previews and sent us suggestions/feedback/bug reports.  We hope you like the final release! Scott

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  • Fun Visual Studio 2010 Wallpapers

    - by Latest Microsoft Blogs
    Two weeks ago I blogged about a cool new site that allows you to download and customize the Visual Studio code editor background and text colors (for both VS 2008 and VS 2010 version). The site also allows you to submit and share your own Visual Studio Read More......(read more)

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  • T4 Template error - Assembly Directive cannot locate referenced assembly in Visual Studio 2010 proje

    - by CodeSniper
    I ran into the following error recently in Visual Studio 2010 while trying to port Phil Haack’s excellent T4CSS template which was originally built for Visual Studio 2008.   The Problem Error Compiling transformation: Metadata file 'dotless.Core' could not be found In “T4 speak”, this simply means that you have an Assembly directive in your T4 template but the T4 engine was not able to locate or load the referenced assembly. In the case of the T4CSS Template, this was a showstopper for making it work in Visual Studio 2010. On a side note: The T4CSS template is a sweet little wrapper to allow you to use DotLessCss to generate static .css files from .less files rather than using their default HttpHandler or command-line tool.    If you haven't tried DotLessCSS yet, go check it out now!  In short, it is a tool that allows you to templatize and program your CSS files so that you can use variables, expressions, and mixins within your CSS which enables rapid changes and a lot of developer-flexibility as you evolve your CSS and UI. Back to our regularly scheduled program… Anyhow, this post isn't about DotLessCss, its about the T4 Templates and the errors I ran into when converting them from Visual Studio 2008 to Visual Studio 2010. In VS2010, there were quite a few changes to the T4 Template Engine; most were excellent changes, but this one bit me with T4CSS: “Project assemblies are no longer used to resolve template assembly directives.” In VS2008, if you wanted to reference a custom assembly in your T4 Template (.tt file) you would simply right click on your project, choose Add Reference and select that assembly.  Afterwards you were allowed to use the following syntax in your T4 template to tell it to look at the local references: <#@ assembly name="dotless.Core.dll" #> This told the engine to look in the “usual place” for the assembly, which is your project references. However, this is exactly what they changed in VS2010.  They now basically sandbox the T4 Engine to keep your T4 assemblies separate from your project assemblies.  This can come in handy if you want to support different versions of an assembly referenced both by your T4 templates and your project. Who broke the build?  Oh, Microsoft Did! In our case, this change causes a problem since the templates are no longer compatible when upgrading to VS 2010 – thus its a breaking change.  So, how do we make this work in VS 2010? Luckily, Microsoft now offers several options for referencing assemblies from T4 Templates: GAC your assemblies and use Namespace Reference or Fully Qualified Type Name Use a hard-coded Fully Qualified UNC path Copy assembly to Visual Studio "Public Assemblies Folder" and use Namespace Reference or Fully Qualified Type Name.  Use or Define a Windows Environment Variable to build a Fully Qualified UNC path. Use a Visual Studio Macro to build a Fully Qualified UNC path. Option #1 & 2 were already supported in Visual Studio 2008, so if you want to keep your templates compatible with both Visual Studio versions, then you would have to adopt one of these approaches. Yakkety Yak, use the GAC! Option #1 requires an additional pre-build step to GAC the referenced assembly, which could be a pain.  But, if you go that route, then after you GAC, all you need is a simple type name or namespace reference such as: <#@ assembly name="dotless.Core" #> Hard Coding aint that hard! The other option of using hard-coded paths in Option #2 is pretty impractical in most situations since each developer would have to use the same local project folder paths, or modify this setting each time for their local machines as well as for production deployment.  However, if you want to go that route, simply use the following assembly directive style: <#@ assembly name="C:\Code\Lib\dotless.Core.dll" #> Lets go Public! Option #3, the Visual Studio Public Assemblies Folder, is the recommended place to put commonly used tools and libraries that are only needed for Visual Studio.  Think of it like a VS-only GAC.  This is likely the best place for something like dotLessCSS and is my preferred solution.  However, you will need to either use an installer or a pre-build action to copy the assembly to the right folder location.   Normally this is located at:  C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\PublicAssemblies Once you have copied your assembly there, you use the type name or namespace syntax again: <#@ assembly name="dotless.Core" #> Save the Environment! Option #4, using a Windows Environment Variable, is interesting for enterprise use where you may have standard locations for files, but less useful for demo-code, frameworks, and products where you don't have control over the local system.  The syntax for including a environment variable in your assembly directive looks like the following, just as you would expect: <#@ assembly name="%mypath%\dotless.Core.dll" #> “mypath” is a Windows environment variable you setup that points to some fully qualified UNC path on your system.  In the right situation this can be a great solution such as one where you use a msi installer for deployment, or where you have a pre-existing environment variable you can re-use. OMG Macros! Finally, Option #5 is a very nice option if you want to keep your T4 template’s assembly reference local and relative to the project or solution without muddying-up your dev environment or GAC with extra deployments.  An example looks like this: <#@ assembly name="$(SolutionDir)lib\dotless.Core.dll" #> In this example, I’m using the “SolutionDir” VS macro so I can reference an assembly in a “/lib” folder at the root of the solution.   This is just one of the many macros you can use.  If you are familiar with creating Pre/Post-build Event scripts, you can use its dialog to look at all of the different VS macros available. This option gives the best solution for local assemblies without the hassle of extra installers or other setup before the build.   However, its still not compatible with Visual Studio 2008, so if you have a T4 Template you want to use with both, then you may have to create multiple .tt files, one for each IDE version, or require the developer to set a value in the .tt file manually.   I’m not sure if T4 Templates support any form of compiler switches like “#if (VS2010)”  statements, but it would definitely be nice in this case to switch between this option and one of the ones more compatible with VS 2008. Conclusion As you can see, we went from 3 options with Visual Studio 2008, to 5 options (plus one problem) with Visual Studio 2010.  As a whole, I think the changes are great, but the short-term growing pains during the migration may be annoying until we get used to our new found power. Hopefully this all made sense and was helpful to you.  If nothing else, I’ll just use it as a reference the next time I need to port a T4 template to Visual Studio 2010.  Happy T4 templating, and “May the fourth be with you!”

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  • Getting Current with Visual Studio 2010 for Web Developers

    - by plitwin
    I don't know about you, but I find it kind of crazy at times figuring out if I have the latest of everything there is for the Visual Studio 2010 developer from Microsoft. (This does not include any third-party components, just recommended updates from Microsoft.) And the be honest, the msn.microsoft.com and asp.net sites are not that helpful in figuring this out.In an effort to help, I have enumerated here what the latest VS 2010 setup should include, complete with download links. When you install everything here, you will be able to develop ASP.NET 4.0 Web Forms and ASP.NET MVC 3 applications and web sites in addition to the other stuff your version of Visual Studio supports (e.g., Silverlight, WPF, etc.). These downloads will also include NuGet and the Entity Framework 4.1, so there is no need to download this software separately.Visual Studio 2010. First of all, you need to purchase and install Visual Studio 2010 itself. For the free Express version, you can download it from Visual Web Developer 2010 ExpressVisual Studio Service Pack 1 (released Spring 2011).This is a must-have download that fixes a bunch of bugs and a number of enhancements too including preliminary support for HTML5 and CSS3. See #4 below for better support of these web technologies. Download and install from VS 2010 SP1 download page. You can find details on the features of the service pack here. ASP.NET MVC3 Tools Update (released Spring 2011)If you are using ASP.NET MVC 3, then you should also download install this update for Visual Studio from ASP.NET MVC3 Tools Update download page. This update improves Visual Studio's support for MVC 3, including better scaffolding, NuGet, Entity Framework 4.1, and more. A good overview of the updates can be found in Phil Haack's blog post.Web Standards Update for Microsoft Visual Studio 2010 SP1 (released June 2011)This is an update to VS 2010 SP1 that "brings VS 2010 intellisense & validation as close to W3C specification as we could get via means of an extension". Download and install from Web Standards Update download page. A good description of the changes can be found in the Visual Web Developer Team blog post.Note: I don't control these download pages, so it is possible they will change. If so, I will do my best to update these links. This information was current as of June 24, 2011.

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