[Mono-bugs] [Bug 362112] New: PropertyGrid: blank Char property field contains a null char

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Fri Feb 15 06:17:19 EST 2008


           Summary: PropertyGrid: blank Char property field contains a null
           Product: Mono: Class Libraries
           Version: SVN
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: andyhume32 at yahoo.co.uk
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---

Created an attachment (id=195102)
 --> (https://bugzilla.novell.com/attachment.cgi?id=195102)
Repro code

When editing an uninitialised Char property the text field initially contains a
(generally invisible!) null character.  The field should be empty in that case.
 To repro, run the attached code which has a property of type char, click in it
and type 'a' (without the quotes), confirm the edit (hit return, etc), and see
error "...value 'a ' is not...", note the two chars in the quotes.  (On some
systems the null character is visible as a square etc).

This is actually a flaw in the CharTypeConverter, see the test case below which
passes on MSFT:

public void NullChar()
   TypeConverter tc = new CharConverter ();
   Char input = (char)0;
   String str = (String)tc.ConvertTo (input, typeof (String));
   Assert.IsNotNull (str, "1-not null");
   Assert.AreEqual (0, str.Length, "2-empty");

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