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2010-12-16

SoapExceptionWrapper

I wrote this code quite a while ago, but since it’s quite reusable (and very simple) here it is:

using System;
using System.Collections.Generic;
using System.Text;
using System.Web.Services.Protocols;
using System.Xml;

namespace SupportLibrary.ExceptionHandling
{

    /// <summary>
    /// Wrapper Class for Soap Exception from JBoss.
    /// Parses the XML in the Detail XML Node, exposing StatusCode and StatusDescription as properties.
    /// </summary>
    /// <example>
    /// int errorCode = -1;
    /// try
    /// {
    ///     WebService.DoSomething();
    /// }
    /// catch(SoapException soapex)
    /// {
    ///     SoapExceptionWrapper wrapper = new SoapExceptionWrapper(soapex);
    ///     int errorCode = wrapper.StatusCode;
    ///     string errorDescription = wrapper.StatusDescription;
    /// }  
    /// </example>
    public class SoapExceptionWrapper
    {
        private SoapException _ex;

        /// <summary>
        /// The XmlNode containing the Detail information about the error.
        /// </summary>
        public XmlNode DetailXml
        {
            get
            {
                return _ex.Detail.FirstChild;
            }
        }

        /// <summary>
        /// Status code from SoapException Detail XML.
        /// </summary>
        public int StatusCode
        {
            get
            {
                string codeStr = "-1";
                if(DetailXml != null && DetailXml.ChildNodes.Count > 0)
                    codeStr = DetailXml.SelectSingleNode("StatusCode").InnerText;
                int codeInt = -1;
                int.TryParse(codeStr, out codeInt);
                return codeInt;
            }
        }

        /// <summary>
        /// Status description from SoapException Detail XML.
        /// </summary>
        public string StatusDescription
        {
            get
            {
                if (DetailXml != null && DetailXml.ChildNodes.Count > 0 && DetailXml.SelectSingleNode("StatusDescription") != null && DetailXml.SelectSingleNode("StatusDescription").InnerText != "")
                {
                    return DetailXml.SelectSingleNode("StatusDescription").InnerText;
                }
                return _ex.Message;
            }
        }

        /// <summary>
        /// Constructor using default values.
        /// </summary>
        /// <param name="soapex"></param>
        public SoapExceptionWrapper(SoapException soapex)
        {
            _ex = soapex;
        }
    }
}