How can I assign TypeConverter to Enum in Options? #944
Description
I've declared Options which will be used for parsing command line.
public class Options {
// ...
[Option('o', "operation", HelpText = "")]
[TypeConverter(typeof(OperationConverter))]
public Operation Operation { get; set; }
}And the Operation looks like this:
[TypeConverter(typeof(OperationConverter))]
public enum Operation {
// ...
CreateDirectory,
// ...
}Since CreateDirectory is quite long to type in command line, I want to allow cd as valid Operation.CreateDirectory
public class OperationConverter : EnumConverter {
// ... candidates for other enum values
private static readonly List<string> OperationCandidate = ["createdirectory", "cd"];
// ...
public override object ConvertFrom(ITypeDescriptorContext? ctx, CultureInfo? ci, object value) {
if (value is string s) {
string l = s.Trim().ToLowerInvariant();
// ...
if (OperationCandidate.Contains(l)) return Operation.CreateDirectory;
// ...
}
}
}But I can't assign this OperationConverter to Options.Operation. I don't see anything that might be related to this.
#83 says it is resolved, but at the bottom of that issue, someone said:
I dont think this works in the latest version. I tried annotating my option's property, but the converter is not invoked. Instead I had to register it using
TypeDescriptor.AddAttributes().
But I don't see any methods named .AddAttributes() in TypeDescriptor. this has .AddAttributes(), but this doesn't seem to work.
private static void Main(string[] args) {
// ...
TypeDescriptor.AddAttributes(typeof(Operation), new TypeConverterAttribute(typeof(OperationConverter)));
// other logic + command line parsing
}Now I'm completely lost. Wiki doesn't provide any useful information that I can easily access.
How can I assign TypeConverter to Enum in Options?