how to create error log file in asp.net

  void Application_Error(object sender, EventArgs e)

    {

        Try

        {

            // Code that runs when an unhandled error occurs



            // Get the error details     

            HttpContext CurrentHTTPcontext = HttpContext.Current;

            HttpException lastErrorWrapper = Server.GetLastError() as HttpException;  



            Exception lastError = lastErrorWrapper;

            if (lastErrorWrapper.InnerException != null)

                lastError = lastErrorWrapper.InnerException;



            string ErrorPageURL = CurrentHTTPcontext.Request.Url.ToString();

            string ErrorMessage = lastError.Message;

            string ErrorStackTrace = lastError.StackTrace;



            MainFunction mainfun = new MainFunction();

            SqlConnection sqlcon = new SqlConnection(ConfigurationSettings.AppSettings["CON"]);

                Try

            {



                SqlCommand sqlcmd = new SqlCommand();

                sqlcmd.CommandType = CommandType.StoredProcedure;

                sqlcmd.Connection = sqlcon;



                sqlcmd.Parameters.Add(new SqlParameter("@PageURL", SqlDbType.VarChar, 500)).Value = Server.HtmlEncode(ErrorPageURL);

                sqlcmd.Parameters.Add(new SqlParameter("@ErrorMessage", SqlDbType.VarChar, 2000)).Value = Server.HtmlEncode(ErrorMessage);

                sqlcmd.Parameters.Add(new SqlParameter("@ErrorStackTrace", SqlDbType.Text)).Value = Server.HtmlEncode(ErrorStackTrace);

                sqlcmd.CommandText = "Sp__ErrorLog";  // Procedure Name



                if (sqlcon.State == ConnectionState.Closed)

                {

                    sqlcon.Open();

                }



                sqlcmd.ExecuteNonQuery();



                if (sqlcon.State == ConnectionState.Open)

                {

                    sqlcon.Close();

                }

            }

            catch

            {

                if (sqlcon.State == ConnectionState.Open)

                {

                    sqlcon.Close();

                }

            }





        }

        catch

        {



        }



    }

R D Patel

R D Patel

R D Patel