Type conversion errors.

Type conversion errors.

• AmitJoshi

  ok, here's the exact error, and some additional info.
  
  Error :  InvalidCastExecption
  'Conversion from String "0.5" to Type Single is not valid.'
  
  That's it.  No other info in the error.
  
  VB Express Edition Version 8.0.50215.44
  
  I have .NET framework 2.0.50215  installed.  (Checked in C:\Windows\Microsoft.Net\Framework\)
  
  I have already un-installed and re-installed vb 2005, .net 2.0 (deleted the left-over folders after un-install too), and get the exact same error.
  
  It doesn't seem to be project related either, as i can open the Emmediate window, and type sngSingle = cSng("0.5") and get a invalid cast exception too.
  
  
  Dustin.
  
  

• jimmyglo

  Hi dustin,
  
  I just loaded you code into a new project in my Beta II (Team server) and it ran just fine and had no problems with the conversions you had trouble with.
  
  

• eric_delage

  Hi,
  
  The code worked fine on my copy of team server too.  It's the VB 2005 Express edition that's giving me the problem.  In theory, there should be no difference how the compiler parses these kinds of conversions.  I'll have a more detailed reply when i get back to work at the computer.
  
  Dustin.
  
  
  

• JasonStowe

  Perfect!  Worked great.
  
  I didn't use your exact sample, but it led me down the correct path.
  
  Thanks for all your help :)  Back to coding now :)
  
  Dustin
  
  

• PaulFnNY

  I'm making a scripting engine, and it's loading code from a file.
  
  basically for example, a line of code would look like..
  
  'Create mesh command, file name, x, y ,z
  CreateMesh Mesh.x 0.3, 0.5, 0.2
  
  each item is split up using space as a delimiter.  I create a string() array
  in the above sample, i create a vector3 like so..
  
  Dim V3 as New Vector3(CSng(strArray(2)), CSng(strArray(3)), CSng(strArray(4)))
  
  Now, if on my home computer that's english, this works Ok cause the region is en-us.  However, at work, on a french system, the region is canada french, and the demical character becomes a comma ( , )
  
  If i edit my script files, and change the line to CreateMesh Mesh.x 0,3, 0,5, 0,2
  then it works great.  Only problem is, there's alot of script, and i want to be able to use the same script files on any region.
  
  So, basically, is there a way to specify in the code, to use a default culture when parsing variables    I really really don't want to have to go through my entire script engine and change all the conversions to 
  
  Dim s1 As Single = Single.Parse("0.5", New System.Globalization.CultureInfo("En-us"))
  
  Although it would work, it's just not practical.  I would have to spend a couple weeks doing this.
  
  
  
  Dustin.

  
  
  

• delantian

  OK, Found the error.
  
  The computer at work is a French OS, and the decimal point was setup for ,  instead of .
  
  So when i used sngSingle = CSng("0,5")  it worked just fine.
  
  So instead of re-writing the code with commas, i set the regional options of the computer to english US, and everything worked OK.
  
  Weird error.  Is there a way around this   other then changing regional settings
  
  

• JDSS

  Before I give any suggestions, I'd like to take a step back and ask why you have the number in a string representation in the first place
  
  Do you get it from a database
  
  Do you get it from the user
  
  Do you get it from a configuration file
  
  Best regards,
  Johan Stenberg
  
  

• DFlatGuy

  It's the latest vb2005 beta 2 version.  I downloaded it from msdn 2 days ago.
  
  The error is a general exception as typecasting error.  Can't convert String "0.5" to Single
  I can't give you the exact wording as it's a work development computer with no internet acces  Next time i'm at work i'll get it.  But generally, there was no useful information in the error, other  then it said typecast error from string to single, using every example from my first post..
  
  The weird thing is, there are no errors during compile, even if i set the compiler implicit conversion setting to 'error'.  (i write pretty tight code).   The error only happens when the code is run, and gets to the point where i'm doing the actual conversion.
  
  I know this should work....  I'm not sure whats going on.    I'll post the exact error soon.
  
  Dustin.
  
  
  

• johnd2

  OMG!!!!!
  
  That's strange! :/
  
  

• Simeon Antonov

  Hi,

  Express editions have no problems with type conversions. What specifically is the error I just tried it in my C# express copy and it seems to work just fine. The last two lines of your code should work.. what build is your express

   

  cheers,

  Paul June A. Domag

  
  
  

• Misch

  You can tell Single.Parse what locale you want to use when parsing the single:
  
  Dim s1 As Single = Single.Parse("0.5", New System.Globalization.CultureInfo("En-us"))

  Best regards,
  Johan Stenberg

  
  
  

• amberBC

  You may want to consider setting the current culture for the thread to InvariantCulture:
  
  

  System.Threading.Thread.CurrentThread.CurrentCulture = System.Globalization.CultureInfo.InvariantCulture

  
  
  For more info, see: http://msdn.microsoft.com/library/default.asp url=/library/en-us/cpguide/html/cpconusingcurrentcultureproperty.asp
  
  Best regards,
  Johan Stenberg

  
  
  

• Matt ms user

  I'm not sure if there are limitations on types in the express version...however try ..
  
  sngSingle = convert.ToSingle("0.5")
  
  If that doesn't work...i suspect its an issue with the express versions....
  
  you may want to post this in the express forum:
  
  http://forums.microsoft.com/msdn/ShowForum.aspx ForumID=24
  
  
  
  
  

• bogomil

  well, that would mean re-writing about 1000 lines just for this conversion.  I will use it as a last resort.  Is there no way of specifying a default once and not having to retype it
  
  Dustin

  
  
  
• Type conversion errors.