How to Log an Exception With a Simple Example in C#

In this blog you will learn how to log an exception with a simple example in C#.

Introduction

In this article, I have shared how to log an exception in a text document so that it will be stored permanently in the database. I have attached the source code in the attachment section.

Write the following code in catch block of any event:

protected void btnsave_Click(object sender, EventArgs e)
  {
      try
      {
                    //code requires as per your requirement
      }
      catch(Exception ex)
      {

           //show some appropriate message to the user
          lbldiserr.Text = "Something went wrong in Server, Kindly contact administator";

           //getting page name also -it is optional
          string senderpagename = Path.GetFileNameWithoutExtension(Page.AppRelativeVirtualPath);

          LogException(ex, senderpagename);

      }


  }

public static void LogException(Exception exc, string senderpagename)
  {
      // Include enterprise logic for logging exceptions
      // Get the absolute path to the log file
      string logFile = "~/App_Data/ErrorLog.txt";

      logFile = HttpContext.Current.Server.MapPath(logFile);

      // Open the log file for append and write the log
      StreamWriter sw = new StreamWriter(logFile, true);
      sw.WriteLine("********** {0} **********", DateTime.Now);
      if (exc.InnerException != null)
      {
          sw.Write("Inner Exception Type: ");
          sw.WriteLine(exc.InnerException.GetType().ToString());
          sw.Write("Inner Exception: ");
          sw.WriteLine(exc.InnerException.Message);
          sw.Write("Inner Source: ");
          sw.WriteLine(exc.InnerException.Source);
          if (exc.InnerException.StackTrace != null)
          {
              sw.WriteLine("Inner Stack Trace: ");
              sw.WriteLine(exc.InnerException.StackTrace);
          }
      }
      sw.Write("Exception ID:");
      sw.WriteLine(((System.Data.SqlClient.SqlException)(exc)).Number);
      sw.Write("Exception Type: ");
      sw.WriteLine(exc.GetType().ToString());
      sw.WriteLine("Exception: " + exc.Message);
      sw.WriteLine("Source: " + senderpagename);
      sw.WriteLine("Stack Trace: ");
      if (exc.StackTrace != null)
      {
          sw.WriteLine(exc.StackTrace);
          sw.WriteLine();
      }


      StackTrace stackTrace = new StackTrace();
      StackFrame stackFrame1 = stackTrace.GetFrame(1);
      MethodBase methodBase1 = stackFrame1.GetMethod();

      // Displays “WhatsmyName”
      string Parent_Method_name = methodBase1.Name;

      SqlDatabase objdb = new SqlDatabase(OneStopMethods_Common.constring_Property);
      string  exceptionno = ((System.Data.SqlClient.SqlException)(exc)).Number.ToString();
      string execeptiontype = exc.GetType().ToString();
      string message = exc.Message.Replace("'","");
      string sourcepage = senderpagename;
      string whereinsql = ((System.Data.SqlClient.SqlException)(exc)).Procedure;

      string orginalquery = " insert into adm_app_log(app_log_id,app_log_type,app_log_module_name,app_log_control_name,app_log_routine_name,app_log_desc,date_created,created_by,date_updated,updated_by) " +
                       "values(Exceptionid,'Exception_Type','whichpageoccured','whichevent_itoccured','Sql_Detail','whatismessage',GETDATE(),'Admin',GETDATE(),'Admin')";

      string replacedquery = orginalquery.Replace("Exception_Type", execeptiontype).Replace("Exceptionid", exceptionno).Replace("whatismessage", message).Replace("whichevent_itoccured", Parent_Method_name).Replace("whichpageoccured", sourcepage).Replace("Sql_Detail", whereinsql);



      objdb.ExecuteDataSet(CommandType.Text, replacedquery);
      //if (EventLog.SourceExists("karthik_Testing"))
      //{
      //    EventLog eventlog = new EventLog("TPMS_Log");
      //    eventlog.Source = "TPMS_Log";
      //    eventlog.WriteEntry(sw.ToString(), EventLogEntryType.Error);
      //}
      sw.Close();
  }

I hope the above information was helpful, kindly share your valuable feedback or thoughts.