Silverlight WCF Inner-Exceptions

Found a quick and dirty way to do WCF exceptions in silverlight http://code.msdn.microsoft.com/Project/Download/FileDownload.aspx?ProjectName=silverlightws&DownloadId=3473 .  The problem is that it doesn’t do inner-exceptions.

I changed the raw fault exception around a bit to get inner exceptions working.

 

    public static RawFaultException BuildRawFaultException(XmlDictionaryReader reader)
    {
        List<string> messages = new List<string>();
        List<string> stacktraces = new List<string>();          
        while (reader.ReadToFollowing("Message"))
        {
            string message = reader.ReadElementContentAsString();
            string stackTrace = reader.ReadElementContentAsString("StackTrace", reader.NamespaceURI);
            messages.Add(message);
            stacktraces.Add(stackTrace);           
        }
        RawFaultException e = null;
        for (int i = 0; i < messages.Count; i++)
        {
            if (e == null) { e = new RawFaultException(messages[i]) { stackTrace = stacktraces[i] }; }
            else { e = new RawFaultException(messages[i], e) { stackTrace = stacktraces[i] }; }
        }

        return e;

    }
}

Flag enums

I was working on a project that needed to use flag enums to store state.  Flag enums are great, except after 2^15 the numbers get hard to calculate. I resorted to using excel to generate the enum code for me, that is until I learned I can do math expressions inside of enums! What I forgot is that 2^0 is not equivalent to Math.Pow(2,0).  This is when I discovered my old friend shift.

 

 

using System;

namespace TestEnum
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(oldway.All);
            Console.WriteLine(newway.All);
        }
    }

    [Flags]
    enum oldway
    {
        None=0,
        One=1,
        Two=2,
        Three=4,
        Four=8,
        All=15
    }

    [Flags]
    enum newway
    {
        None = 0,
        One = 1<<0,
        Two = 1<<1,
        Three = 1<<2,
        Four = 1<<3,
        All = (1<<4) - 1
    }
}

 

As you can see they both work the same :)