Build a Custom Importer or Exporter

using System;
using System.IO;
using System.Text;
using System.Windows.Forms;
using Fiddler;
using System.Diagnostics;
using System.Reflection;
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: Fiddler.RequiredVersion("2.4.0.0")]


[ProfferFormat("TAB-Separated Values", "Session List in Tab-Delimited Format")]
[ProfferFormat("Comma-Separated Values", 
	"Session List in Comma-Delimited Format; import into Excel or other tools")]

public class CSVTranscoder: ISessionExporter  // Ensure class is public, or Fiddler Classic won't see it!
{
	public bool ExportSessions(string sFormat, Session[] oSessions, Dictionary<string, object> dictOptions,
		EventHandler<ProgressCallbackEventArgs> evtProgressNotifications)
	{
	bool bResult = false; 
	string chSplit;

	// Determine if we already have a filename from the dictOptions collection
	string sFilename = null;
	if (null != dictOptions && dictOptions.ContainsKey("Filename"))
	{
		sFilename = dictOptions["Filename"] as string;
	}

	if (sFormat == "Comma-Separated Values")
	{
		chSplit = ",";
		if (string.IsNullOrEmpty(sFilename)) sFilename = Fiddler.Utilities.ObtainSaveFilename("Export As " + sFormat, "CSV Files (*.csv)|*.csv");
	}
	else
	{
		chSplit = "\t";
		if (string.IsNullOrEmpty(sFilename)) sFilename = Fiddler.Utilities.ObtainSaveFilename("Export As " + sFormat, "TSV Files (*.tsv)|*.tsv");
	}

	if (String.IsNullOrEmpty(sFilename)) return false;

	try
	{
		StreamWriter swOutput = new StreamWriter(sFilename, false, Encoding.UTF8);
		int iCount = 0;
		int iMax = oSessions.Length;

		#region WriteColHeaders
		bool bFirstCol = true;
		foreach (ColumnHeader oLVCol in FiddlerApplication.UI.lvSessions.Columns)
		{
		if (!bFirstCol)
		{
		swOutput.Write(chSplit);
		}
		else
		{
		bFirstCol = false;
		}
		swOutput.Write(oLVCol.Text.Replace(chSplit, ""));
		}
		swOutput.WriteLine();
		#endregion WriteColHeaders

		#region WriteEachSession
		foreach (Session oS in oSessions)
		{
		iCount++;
		if (null != oS.ViewItem)
		{
		bFirstCol = true;
		ListViewItem oLVI = (oS.ViewItem as ListViewItem);
		if (null == oLVI) continue;
		foreach (ListViewItem.ListViewSubItem oLVC in oLVI.SubItems)
		{
			if (!bFirstCol)
		{
			swOutput.Write(chSplit);
		}
		else
		{
			bFirstCol = false;
		} 

			swOutput.Write(oLVC.Text.Replace(chSplit, ""));
		}

		swOutput.WriteLine();
		}

		if (null != evtProgressNotifications)
		{
		evtProgressNotifications(null, new ProgressCallbackEventArgs(, ));
		ProgressCallbackEventArgs PCEA = new ProgressCallbackEventArgs((iCount/(float)iMax), "wrote " + iCount.ToString() + " records.");
		evtProgressNotifications(null, PCEA);
		if (PCEA.Cancel) { swOutput.Close(); return false; }
		}
	}
	#endregion WriteEachSession

	swOutput.Close();
	bResult = true;
	}
	catch (Exception eX)
	{
		MessageBox.Show(eX.Message, "Failed to export");
		bResult = false;
		}
	}
	return bResult;
	}

	public void Dispose()
	{
	}
}