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Editorial Team
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Asked: 2026-05-27T14:10:56+00:00

My Problem In Microsoft Visual Web Developer Express 2010, my intellisense suddenly stopped working

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My Problem

In Microsoft Visual Web Developer Express 2010, my intellisense suddenly stopped working today for my front end HTML (.aspx) files but is still working fine for code behind (.cs) files.

Along with this, when I hover over any asp control declared in my aspx pages, it says 

validation(): Element 'control' is not supported.
validation(): Element 'label' is not supported.
etc...

(side note: ‘control’ and ‘label’ are lowercase in the message, instead of the proper case)

My Progress

I have been looking around for answers,

  • a few people suggested deleting certain files, such as the “*.ncb”,
    but I have not been able to find any MS files with this extention
    anywhere (hidden files are visible).
  • I have a “Web Site”, not a “Project” so within my site there are no
    *.sln”, *.proj, *.suo” files to delete either.
  • One suggestion was to “Clean” my project, but I can’t find that
    option anywhere.
  • Another person suggestion running “MS Developer command prompt” and
    executing a utility called “devenv” with certain arguments. I do not
    have the “MS Developer command prompt”, I assume because I am using
    the Express Edition. I cannot find the devenv utility in my file
    system as well.
  • I have checked all my master pages but haven’t noticed anything
    weird.
  • I looked in the Tools > Options menu but didn’t find any “intellisense” type of thing anywhere. My “Show all settings” is turned on.
  • I tried changing the doc type in the dropdown from XHTML 1.0 Transitional to all the other things just to see, with no luck.

My Plea to fellow .Net-ers

My website builds just fine with no errors, it’s just having no intellisense on my aspx pages is driving me nuts.

Is there anything else I can try? Any thoughts appreciated. Thanks!

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1 Answer

  1. Editorial Team

    OK,

    DevEnv is the program name for visual studio – it will be here:

    “C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exe” on a 64 bit OS
    or
    “C:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exe” on a 32 bit OS.
    Right click on the icon you use to run VS and then click properties and it will tell you where this file is in the Target box.

    To clean a project, right click the project in the solution explorer and then click Clean.

    Visual studio command prompt will be in the start menu under:
    Microsoft Visual Studio 2010 > Visual Studio Tools
    There may be several version depending if you are running on a 64bit OS, Itanium, etc. You can also just run DevEnv from the Run box or ordinary command prompt.
    The 32bit version can be run from the Run Box using the following (if on 64 bit, add ” (x86″ after “Program Files”):

    %comspec% /k ""C:\Program Files\Microsoft Visual Studio 10.0\VC\vcvarsall.bat"" x86

    Personally, after closing down VS and rebooting the machine to check if it was just a process crash causing it (i.e. restart from a fresh OS and VS load) – I would reset option (see here /ResetSettings (devenv.exe)).

    Good luck, and please reply back mif this worked or did not so to give the thread a conclusion. 😀

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