System.io library classes not working properly

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Ok, a couple of remarks - don’t take it personally:

  1. Don’t post code as html. Use code tags for it (simplest way - put three ` at the beginning and at end:
Like this 
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Text;
using System.Activities.Presentation.Metadata;

namespace errorcapturing
{
    public class ErrorHandle
    {
        private static String ErrorlineNo, Errormsg, extype, ErrorLocation;

        public static void SendErrorToText(Exception ex)
        {
            var line = Environment.NewLine + Environment.NewLine;
            ErrorlineNo = ex.StackTrace.Substring(ex.StackTrace.Length - 7, 7);
            Errormsg = ex.GetType().Name.ToString();
            extype = ex.GetType().ToString();
            ErrorLocation = ex.Message.ToString();
            try
            {
                string filepath = "c:\\LogError\\";
                //Text File Path 
                if (!Directory.Exists(filepath))
                {
                    Directory.CreateDirectory(filepath);
                }
                filepath = filepath + "ProgramLog" + " " + DateTime.Today.ToString("yyyy-MM-dd") + "." + "txt";
                //Text File Name 
                if (!File.Exists(filepath))
                {
                    File.Create(filepath).Dispose();
                }
                using (StreamWriter sw = File.AppendText(filepath))
                {
                    string error = "Log Written Date:" + " " + DateTime.Now.ToString() + line + "Error Line No :" + " " + ErrorlineNo + line + "Error Message:" + " " + Errormsg + line + "Exception Type:" + " " + extype + line + "Error Location :" + " " + ErrorLocation + line;
                    sw.WriteLine("-----------Exception Details on " + " " + DateTime.Now.ToString() + "-----------------");
                    sw.WriteLine("-------------------------------------------------------------------------------------");
                    sw.WriteLine(line);
                    sw.WriteLine(error);
                    sw.WriteLine("--------------------------------*End*------------------------------------------");
                    sw.WriteLine(line);
                    sw.Flush();
                    sw.Close();
                }
            }
            catch (Exception e) { e.ToString(); }
        }
    }
    // Declare dummy register metadata class to force UiPath to load this assembly 
    public class RegisterMetadata : IRegisterMetadata { public void Register() { } }
}

Sidenote: that catch body does nothing useful :frowning:

  1. You might be better off just reconfiguring NLog - see here for example. That way you can have errors in separate file.

  2. An activity for this kind of custom logger might look similar to this:

CodeActivity 
public sealed class LogExceptionToFile : CodeActivity
    {
        [RequiredArgument]
        public InArgument<Exception> ExceptionToLog { get; set; }

        [DefaultValue(@"c:\LogError")]
        public InArgument<String> LogFolderPath { get; set; }

        protected override void Execute(CodeActivityContext context)
        {
            var ex = ExceptionToLog.Get(context);
            var sb = new StringBuilder();

            sb.AppendFormat("Log Written Date: {0}", DateTime.Now.ToString());
            sb.AppendLine();
            sb.AppendFormat("Error Line No: {0}", ex.StackTrace.Substring(ex.StackTrace.Length - 7, 7));
            sb.AppendLine();
            // add more stuff here

            string filepath = Path.Combine(LogFolderPath.Get(context), "ProgramLog_" + DateTime.Today.ToString("yyyy-MM-dd") + "." + "txt");

            File.AppendAllText(filepath, sb.ToString());
        }
    }

Admittedly it’s not complete and you’ll still need to add what you really want to do there (I just did a barebones convertion from what you had in your code), but it should get you on the track.

Good luck and let us know if you’ll get stuck on something :slight_smile:

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