Error in code

Question

Hi,
I've got issue
Unhandled Exception: System.IndexOutOfRangeException: Index was outside the bounds of the array.

when running code below against this file.
https://1drv.ms/t/s!Ai8CrEskdewXvwCNSDxrFcm60_D-?e=uYhjTP
Why?

using System;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.UI;
using System.IO.Compression;
using System.Text.RegularExpressions;
using System.Xml;
using System.Globalization;
//using Ionic.Zip;
using System.Net;
using System.Net.Http;
using System.Collections.Generic;
using System.Data.OleDb;
//using Microsoft.VisualBasic;
using System.Text; // This was needed to make ASCIIEncoding function
using System.Security.Cryptography; // This was needed to make everything related to MD5 function
using Outlook = Microsoft.Office.Interop.Outlook;

namespace Validate_File1
{
class Program
{
static void Main(string[] args)
{
string Email = "", s_Partner = "", File0, File1, File1b, File2, File3, F4, Call_Sign, Line0= "", Line1 = "", Line2 = "", Line3 = "", Line_Hold = "", ftx_Line1 = "", eqd_Line1 = "", cta_Line1 = "", Ver0 = "", line = "", Str0, Str1 = "";
int Pos0, Pos1, Pos2, Pos3, Pos4, Pos5, Pos6, Pos7, Pos8, Pos9, Pos10 = 0, Pos11 = 0, Pos12, Pos13, Pos14, Pos15, Pos_Hold0, Pos_Hold1, Sep_Count, Len0, UNT_pos, Tot_line, Total_Line1 = 0, eqd2_line_cnt = 0;
bool UNB_Exist, UNZ_Exist, UNT_Exist, NAD_Exist = false, Voy_Ref0, Voy_Ref1, gid_Line, ftx_Line, eqd_Line, eqd2_line = false, eqd3_line = false, cta_Line, cta_OK, codeco = false, Found0, BGM_line = false, TDT_line = false, LOC_line = false;
bool allowappend = true;
Outlook.MailItem mailItem = null;

        File0 = "C:/cmp3g/CODECO_ERROR_a/" + args[0] + "/" + args[1];
        //File1 = "C:/cmp3g/CODECO_ERROR_a/Error" + Format(Now, "mmss") + ".txt"
        File1 = "C:/cmp3g/CODECO_ERROR_a/Error.txt";
        File1b = "C:/cmp3g/CODECO_ERROR_a/Error2.txt";
        File2 = "C:/cmp3g/CODECO_ERROR_a/Temp.txt";
        File3 = "C:/cmp3g/CODECO_ERROR_a/List0.txt";
        F4 = "C:/cmp3g/CODECO_ERROR_a/List7.txt";
        List l7 = new List();

        using (StreamReader sr2 = new StreamReader(@"C:/cmp3g/CODECO_ERROR_a/List7.txt", Encoding.Default))
            ////using (StreamReader sr2 = new StreamReader(@"e:/Upd_China_city.sql", Encoding.Default))
            //{
            while ((line = sr2.ReadLine()) != null)
            {
                //        //if (line.Trim() == "")
                //        //{

                //        //}
                //        //else
                //        {
                //            //str.Add(line.Trim().Substring(6));
                l7.Add(line);
                //            //str.Add((line+"").Substring(5));
                //        }
            }

        Outlook.Application outlookApp = new Outlook.Application();
        if (File.Exists(@File2))
        {
            File.Delete(@File2);
        }

        File.Copy(@File0, @File2);

        Sep_Count = 0; UNT_pos = 0; Tot_line = 0;
        UNB_Exist = false; UNT_Exist = false; UNZ_Exist = false; Voy_Ref0 = false; Voy_Ref1 = false; gid_Line = false; ftx_Line = false; eqd_Line = false; cta_Line = false; cta_OK = false;
        try
        {
            using (StreamReader sr = new StreamReader(@File1, Encoding.Default))
            {
                while ((Line0 = sr.ReadLine()) != null)
                {
                    Total_Line1++;
                    Pos0 = Line0.IndexOf("for partner code '"); Pos1 = Line0.IndexOf("'", Pos0 + 18);
                    if (Pos0 > 0 && Pos1 > 0)
                    {
                        if (Pos1 - Pos0 - 17 > 1)
                        {
                            if (Pos1 - Pos0 - 19 > 0)
                            {
                                Str0 = Line0.Substring(Pos0 + 18, Pos1 - Pos0 - 19); Pos2 = Str0.Trim().Length;
                            }
                            else
                            {
                                Str0 = "";Pos2 = 1;
                            }
                            for (int j = 0; j < l7.Count(); j++)
                            {
                                if (l7[j].Trim().Length >= Str0.Trim().Length)
                                {
                                    if (l7[j].Substring(0, Pos2) == Str0)
                                    {
                                        Pos3 = l7[j].IndexOf(",,"); Pos4 = l7[j].Trim().Length;
                                        if (Pos3 > 0)
                                        {
                                            mailItem = (Outlook.MailItem)outlookApp.CreateItem(Outlook.OlItemType.olMailItem);

                                            if (Pos4 - 3 - Pos3 > 0)
                                                Email = l7[j].Substring(Pos3 + 2, Pos4 - 3 - Pos3);

                                            if (mailItem.EntryID != null)
                                            {
                                                mailItem.Subject = "Coarri Codeco Issue ";
                                                //mailItem.Send();
                                            }

                                        }
                                    }
                                }
                            }
                        }
                    }
                    else
                    {
                        if (mailItem == null)
                            mailItem = (Outlook.MailItem)outlookApp.CreateItem(Outlook.OlItemType.olMailItem);
                        if (mailItem.EntryID != null)
                        {
                            mailItem.HTMLBody = mailItem.HTMLBody + Line0;
                            //mailItem.Send();
                        }

                    }
                    //using (StreamWriter sw = new StreamWriter(@File1, allowappend, Encoding.Unicode))
                    //{
                    //    sw.WriteLine("xxx");
                    //    sw.WriteLine(Line0);
                    //    sw.WriteLine("");
                    //}
                    Pos1 = Line0.IndexOf("'", Pos0 + 1);

                    Pos_Hold0 = Line0.IndexOf("'");
                    Pos_Hold1 = Line0.IndexOf("'", Pos_Hold0 + 1);

                    Line_Hold = Line0;
                }
            }
        }
        catch (Exception e)
        {
            using (StreamWriter sw = new StreamWriter(@File1b, allowappend, Encoding.Unicode))
            {
                sw.WriteLine("Error happens due to file - '" + File0 + "' with detail:  Error with Stacktrace --> " + e.Message + " " + e.StackTrace+Line0);
                sw.WriteLine("");
            }

        }
        finally
        {

        }

    }
}

}

Answer

I suspect the error is happening on one of the Substrings. I would put a check to make sure the string is long enough to access the position you are looking for. (ie make sure you are trying to get data from position 10 of a 9 character long string)

I would also recommend you name the variables a little better if you look at your code 6 months from now a name like Str0 might not make as much sense to you as it does now.

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Error in code

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