[Mono-bugs] [Bug 82118][Wis] New - Cannot convert from string to Enum with FlagsAttribute when more values are specified

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Tue Jul 17 07:51:10 EDT 2007

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Changed by g.tardini at caleidoscopio.it.


--- shadow/82118	2007-07-17 07:51:10.000000000 -0400
+++ shadow/82118.tmp.8087	2007-07-17 07:51:10.000000000 -0400
@@ -0,0 +1,75 @@
+Bug#: 82118
+Product: Mono: Class Libraries
+Version: 1.2
+OS: All
+OS Details: 
+Status: NEW   
+Severity: Unknown
+Priority: Wishlist
+Component: System
+AssignedTo: mono-bugs at ximian.com                            
+ReportedBy: g.tardini at caleidoscopio.it               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+Summary: Cannot convert from string to Enum with FlagsAttribute when more values are specified
+Description of Problem:
+Mono JIT compiler fails when trying to convert a string to an Enum with
+FlagsAttribute when more values are specified.
+Steps to reproduce the problem:
+The following code is extracted from the repository in
+System.Web.Compilation.TemplateControlCompiler at method
+It works on .NET while it doesn't on MONO.
+public enum FlagEnum
+  One = 1,
+  Two = 2
+static void Main(string[] args)
+  TypeConverter converter = TypeDescriptor.GetConverter(typeof(FlagEnum));
+  if (converter != null && converter.CanConvertFrom(typeof(string)))
+  {
+    object value = converter.ConvertFromInvariantString("One, Two");
+    if (converter.CanConvertTo(typeof(InstanceDescriptor)))
+    {
+       InstanceDescriptor idesc =
+(InstanceDescriptor)converter.ConvertTo(value, typeof(InstanceDescriptor));
+    }
+  }
+Actual Results:
+Unhandled Exception: System.ArgumentException: The value 'One, Two' is not
+a valid value for the enum 'MonoTest.Program+FlagEnum'
+  at System.ComponentModel.EnumConverter.ConvertTo (ITypeDescriptorContext
+context, System.Globalization.CultureInfo culture, System.Object value,
+System.Type destinationType) [0x00000] 
+  at System.ComponentModel.TypeConverter.ConvertTo (System.Object value,
+System.Type destinationType) [0x00000] 
+  at MonoTest.Program.Main (System.String[] args) [0x00000] 
+Expected Results:
+The code runs without exceptions
+How often does this happen? 
+Additional Information:
+Note that 
+object value = converter.ConvertFromInvariantString("One, Two");
+works correctly, and value returned contains the enum with the correct
+values (One|Two).
+The problem is on the EnumConverter.ConvertTo() method.

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