Option to convert Arguments object back into args string

Issue by issacg Wednesday Dec 18, 2013 at 10:09 GMT _Originally opened as https://github.com/gsscoder/commandline/issues/114_

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Hi

In my use-case, I needed to (occasionally) construct command line parameters for another instance of my process, and overloaded my class’ ToString method to do so. I’d love to contribute the code back, but not sure if it’s something that’s needed, or where the best place in the library would be to put it.

I’ve included the code here, and if there is interest, and someone would give me some basic guidance as to where the correct place to add this to the library would be, I’d be happy to make a pull request (time permitting 😉)

class MyArguments {
        // Add some option-properties

        public override string ToString()
        {
            string res = "";
            // Get a list of all properties with OptionAttribute
            var props = this.GetType().GetProperties().Where(prop => Attribute.IsDefined(prop, typeof(OptionAttribute)));
            // Now search the list to extract the attribute data
            foreach (PropertyInfo prop in props)
            {
                object[] attrs = prop.GetCustomAttributes(true);
                foreach (object attr in attrs)
                {
                    OptionAttribute oa = attr as OptionAttribute;
                    if (oa != null)
                    {
                        // We found an OptionAttribute!
                        Type t = prop.GetType();
                        var data = prop.GetValue(this, null);
                        // Check if value is "default(t)" or not
                        if (data != (t.IsValueType ? Activator.CreateInstance(t) : null))
                        {
                            // Only print out non-empty parameters
                            res += "--" + oa.LongName + " " + data.ToString() + " ";
                        }
                    }
                }
            }
            return res;
        }
}

[ericnewton76]

Comment by issacg Wednesday Dec 18, 2013 at 16:09 GMT

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It works now.

https://gist.github.com/issacg/8024973

[moh-hassan]

The class UnParserExtensions convert Arguments object back into args string