C# Code Listing for SQL SOAP Trace Sample Class Library

This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature.

Note

Instructions for including the following sample library code in your Visual Studio project are provided in Adding SOAP Trace Support to Client Applications.

using System;
using System.IO;
using System.Web.Services.Protocols;
using System.Threading;
using System.Windows.Forms;
using System.Xml;

class info 
{
    public void Init() 
    {
        m_request = null;
        m_requestException = null;
        m_response = null;
        m_responseException = null;
    }

    public string request 
    {
        get { return m_request; }
        set { m_request = value; }
    }

    public Exception requestException
    {
        get { return m_requestException; }
        set { m_requestException = value; }
    }

    public string response
    {
        get { return m_response; }
        set { m_response = value; }
    }

    public Exception responseException
    {
        get { return m_responseException; }
        set { m_responseException = value; }
    }

    private string m_request = null;
    private Exception m_requestException = null;
    private string m_response = null;
    private Exception m_responseException = null;
}

class snoop : SoapExtension 
{
    public override object GetInitializer(LogicalMethodInfo lmi, SoapExtensionAttribute attr) 
    {
        return getInfo();
    }
    public override object GetInitializer(Type type)
    {
        throw new NotImplementedException("snoop.GetInitializer is not implemented.");
    }
    public override void Initialize(object initializer)
    {
        m_info = (info) initializer;
        m_info.Init();
    }
    public override void ProcessMessage(SoapMessage message) 
    {
        SoapClientMessage client = (SoapClientMessage) message;
        switch (client.Stage) 
        {
            case SoapMessageStage.BeforeSerialize:
                break;
            case SoapMessageStage.AfterSerialize:
                try 
                {
                    m_newStream.Position = 0;
                    StreamReader reader = new StreamReader(m_newStream);
                    m_info.request = FormatXml(reader.ReadToEnd());
                    m_newStream.Position = 0;
                    m_newStream.SetLength(0);
                    StreamWriter writer = new StreamWriter(m_newStream);
                    writer.Write(m_info.request);
                    writer.Flush();
                    Clipboard.SetDataObject(m_info.request+"\r\n",true);
                }
                catch (Exception e) 
                {
                    m_info.requestException = e;
                }
                m_newStream.Position = 0;
                Copy(m_newStream,m_oldStream);
                break;
            case SoapMessageStage.BeforeDeserialize:
                m_newStream.SetLength(0);
                try 
                {
                    Copy(m_oldStream,m_newStream);
                    m_newStream.Position = 0;
                    StreamReader reader = new StreamReader(m_newStream);
                    string tempData = reader.ReadToEnd();
                    m_info.response = FormatXml(tempData);
                    m_newStream.Position = 0;
                    m_newStream.SetLength(0);
                
                    StreamWriter writer = new StreamWriter(m_newStream);
                    writer.Write(tempData);
                    writer.Flush();
                    Clipboard.SetDataObject(m_info.request+"\r\n\r\n"+m_info.response+"\r\n",true);
                }
                catch (Exception e) 
                {
                    m_info.responseException = e;
                }
                m_newStream.Position = 0;
                break;
            case SoapMessageStage.AfterDeserialize:
                break;
            default:
                throw new Exception("invalid stage");
        }
    }
    public override Stream ChainStream(Stream stream)
    {
        m_oldStream = stream;
        m_newStream = new MemoryStream();
        return m_newStream;
    }
    private void Copy(Stream from, Stream to) 
    {
        TextReader reader = new StreamReader(from);
        TextWriter writer = new StreamWriter(to);
        string data = reader.ReadToEnd();
        writer.Write(data);
        writer.Flush();
    }
    private string FormatXml(string xml) 
    {
        XmlDocument inDoc = new XmlDocument();
        inDoc.PreserveWhitespace = false;
        inDoc.LoadXml(xml);
        StringWriter writer = new StringWriter();
        XmlTextWriter xmlWriter = new XmlTextWriter(writer);
        xmlWriter.Formatting = Formatting.Indented;
        inDoc.WriteContentTo(xmlWriter);
        xmlWriter.Flush();
        return writer.ToString();
    }
    private info m_info = null;
    private Stream m_oldStream = null;
    private Stream m_newStream = null;
    //private Stream m_tempStream = null;

    
    public static info getInfo() 
    {
        object res = Thread.GetData(m_slot);
        if (res == null) 
        {
            res = new info();
            Thread.SetData(m_slot,res);
        }
        return (info) res;
    }
    private static LocalDataStoreSlot m_slot = Thread.AllocateDataSlot();
}
[AttributeUsage(AttributeTargets.Method)]
class snoopattribute : SoapExtensionAttribute 
{
    public override Type ExtensionType
    {
        get { return typeof(snoop); }
    }
    public override int Priority 
    {
        get { return m_priority; }
        set { m_priority = value; }
    }
    private int m_priority = 0;
}

See Also

Reference

Writing a Visual Studio 2005 Client Application

Adding SOAP Trace Support to Client Applications