File naming function in c#

I am thinking how I can tailor for :
in the filename the c1c6 is constant but text to left and right of that will change

in vba

I would use an instr to find the start position of c1c6 which would then allow me to work out what the characters were upto c1 ie c1c6 -1 and also after c6 as those will change in length whereas here I believe they are fixed

does c# substring allow me to do that?

0 to substring position -1 = first part of string
substring position + 5 to len(n2) i believe is the last part.

c1c6 always remains 4 characters.

I think this will do it although not sure how to test it yet.
static String getFileName(String n1, String n2)
{
    try {


        String v = "";

      int16 SubstringPosition=0;
      int16 StrLen=n2.len;

         switch (n1.ToLower()) {
         case "region 1":
         default:
            v = n2.Substring(0,SubstringPosition-1) + "C1C2" + n2.Substring(SubstringPosition+5,StrLen);
            break;
         case "region 2":
            v = n2.Substring(0,SubstringPosition-1) + "C3C4" + n2.Substring(SubstringPosition+5,StrLen);
            break;
         case "region 3":
            v = n2.Substring(0,SubstringPosition-1) + "C5C6" + n2.Substring(SubstringPosition+5,StrLen);
            break;
         }
         return v;
    } catch (Exception e) {
        return "";
    }
}
Console.WriteLine("test 1 = "+getFileName("region 1","UNArpC1C6A03"));
Console.WriteLine("test 2 = "+getFileName("region 2","UNArpC1C6A03"));
Console.WriteLine("test 3 = "+getFileName("region 3","UNArpC1C6A03"));
Console.WriteLine("test 4 = "+getFileName("region 4","test"));

   

position begin IndexOf(N2)

ive since installed visual studio but think its missing stuff as I cannot test the function as i get cs0246 errors.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("test 1 = " + getFileName("region 1", "UNArpC1C6A03"));
        }





        static String getFileName(String n1, String n2)
        {
            try
            {


                String v = "";

                int16 SubstringPosition = 0;
                int16 StrLen = n2.len;

                switch (n1.ToLower())
                {
                    case "region 1":
                    default:
                        v = n2.Substring(0, SubstringPosition - 1) + "C1C2" + n2.Substring(SubstringPosition + 5, StrLen);
                        break;
                    case "region 2":
                        v = n2.Substring(0, SubstringPosition - 1) + "C3C4" + n2.Substring(SubstringPosition + 5, StrLen);
                        break;
                    case "region 3":
                        v = n2.Substring(0, SubstringPosition - 1) + "C5C6" + n2.Substring(SubstringPosition + 5, StrLen);
                        break;
                }
                return v;
            }
            catch (Exception e)
            {
                return "";
            }
        }


    }
}

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I am sure the code is ok now.

You used regex nice, I have no experience of c# so was where i was, this is neat as i see it replaces the middle section.

I will try run it, visual studio is strange to me.

i assume you have no objection to sharing the points with the previous poster?

do i need to add some reference to my main for this to work?

it will actually be put into this:

using System;
using System.IO;
using System.Windows.Forms;
using System.Collections.Generic;
using SoundForge;

// Adds regions every 16 seconds to an open audio file. 
// Exports every odd region to a user supplied output directory in the same format as the original open audio file.

public class EntryPoint
{
    public void Begin(IScriptableApp app)
    {
        // select the output directory for the exported regions
        string outDirectory = SfHelpers.ChooseDirectory("Choose the output directory.", @"C:\");

        ISfFileHost work_file = app.CurrentFile;

        // File extension for naming the ouput files
        string outExt = work_file.SaveFormat.Extension;

        // undo wrapper for this script.
        int scriptUndo = work_file.BeginUndo("ScriptUndo");

        SfAudioSelection asel = new SfAudioSelection(work_file);
        SfAudioMarkerList mark_list = work_file.Markers;
        // clear any existing regions
        mark_list.Clear();

        long file_length = asel.Length;
        double lengthLeft = work_file.Formatter.PositionToTime(file_length);
        long regionLength = work_file.Formatter.TimeToPosition(16);
        long currentPos = work_file.Formatter.TimeToPosition(0);

        bool keepGoing = true;
        int regionCount = 1;
        while(keepGoing){
            // check to see if there is enough length left to add the next region
            if (lengthLeft > 8.0)
            {
                string regionName = String.Format("Region_{0}", regionCount);

                // add region
                mark_list.AddRegion(currentPos, regionLength, regionName);

                // export to file if this is an export region
                if (regionCount % 2 != 0)
                {
                    SfAudioSelection regionSel = new SfAudioSelection(currentPos, regionLength);
                    string saveName = Path.Combine(outDirectory, String.Format("{0}.{1}", regionName, outExt));
                    exportRegionToFile(saveName, work_file, regionSel, app);  
                }

                // update our tracking vars.
                currentPos += regionLength;
                lengthLeft -= 8.0;
                regionCount++;

            }
            // else make a region out of whatever time is leftover and set keepGoing to False
            else{
                string regionName = String.Format("Region_{0}", regionCount);
                regionLength = work_file.Formatter.TimeToPosition(lengthLeft);
                mark_list.AddRegion(currentPos, regionLength, regionName);
                // export to file if this is an export region
                if (regionCount % 2 != 0)
                {
                    SfAudioSelection regionSel = new SfAudioSelection(currentPos, regionLength);
                    string saveName = Path.Combine(outDirectory, String.Format("{0}.{1}", regionName, outExt));
                    exportRegionToFile(saveName, work_file, regionSel, app);
                }

                // stop our loop
                keepGoing = false;
            }
        }

        // close the undo wrapper
        work_file.EndUndo(scriptUndo, false);
    }

	




    public void exportRegionToFile(string regionName, ISfFileHost workFile, SfAudioSelection regionSelection, IScriptableApp app){
        ISfFileHost newFile = app.NewFile(workFile.DataFormat, true);
        newFile.OverwriteAudio(0, 0, workFile, regionSelection);
        newFile.SaveAs(regionName, workFile.SaveFormat.Guid, "Default Template", RenderOptions.WaitForDoneOrCancel);
        newFile.Close(CloseOptions.SaveChanges);
    }

    public void FromSoundForge(IScriptableApp app)
    {
        ForgeApp = app; //execution begins here
        app.SetStatusText(String.Format("Script '{0}' is running.", Script.Name));
        Begin(app);
        app.SetStatusText(String.Format("Script '{0}' is done.", Script.Name));
    }
    public static IScriptableApp ForgeApp = null;
    public static void DPF(string sz) { ForgeApp.OutputText(sz); }
    public static void DPF(string fmt, params object[] args) { ForgeApp.OutputText(String.Format(fmt, args)); }
} //EntryPoint

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