如何在txt文件中保存异常？

Question

public DataTable InsertItemDetails(FeedRetailPL objFeedRetPL)
{
    DataTable GetListID = new DataTable();
    try
    {
        SqlParameter[] arParams = new SqlParameter[4];

        arParams[0] = new SqlParameter("@Date", typeof(DateTime));
        arParams[0].Value = objFeedRetPL.requestdate;

    }
    catch (Exception ex)
    {
        string dir = @"C:\Error.txt";  // folder location
        if (!Directory.Exists(dir))
        {
            Directory.CreateDirectory(dir);
            File.AppendAllText(Server.MapPath("~/Error.txt"), "Message :" + ex.Message + "<br/>" + Environment.NewLine + "StackTrace :" + ex.StackTrace +
       "" + Environment.NewLine + "Date :" + DateTime.Now.ToString());
            string New = Environment.NewLine + "-----------------------------------------------------------------------------" + Environment.NewLine;
            File.AppendAllText(Server.MapPath("~/Error.txt"), New);
        }
    }
}

在这里,我想在"C:\"中保存一个异常..我正在尝试在DAL ...如何在C驱动器中保存异常Error.txt

Answer 1

既然你要保存的例外C:\Error.txt,你并不需要Directory.Exists,Directory.CreateDirectory或者Server.MapPath("~/Error.txt").您可以像这样简单地使用StreamWriter:

string filePath = @"C:\Error.txt";

Exception ex = ...

using( StreamWriter writer = new StreamWriter( filePath, true ) )
{
    writer.WriteLine( "-----------------------------------------------------------------------------" );
    writer.WriteLine( "Date : " + DateTime.Now.ToString() );
    writer.WriteLine();

    while( ex != null )
    {
        writer.WriteLine( ex.GetType().FullName );
        writer.WriteLine( "Message : " + ex.Message );
        writer.WriteLine( "StackTrace : " + ex.StackTrace );

        ex = ex.InnerException;
    }
}

C:\Error.txt如果它不存在,上面的代码将创建,C:\Error.txt如果它已经存在,则追加.

Answer 2

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.IO;
    namespace ErrorLoggingSample
    {
     class Program
      {
      static void Main(string[] args)
      {
        try
        {
            string str = string.Empty;
            if (string.IsNullOrEmpty(str))
            {
                throw new Exception("Wrong Data");
            }
        }
        catch (Exception ex)
        {
            ErrorLogging(ex);
            ReadError();
        }

    }

    public static void ErrorLogging(Exception ex)
    {
        string strPath = @"D:\Rekha\Log.txt";
        if (!File.Exists(strPath))
        {
            File.Create(strPath).Dispose();
        }
        using (StreamWriter sw = File.AppendText(strPath))
        {
            sw.WriteLine("=============Error Logging ===========");
            sw.WriteLine("===========Start============= " +       DateTime.Now);
            sw.WriteLine("Error Message: " + ex.Message);
            sw.WriteLine("Stack Trace: " + ex.StackTrace);
            sw.WriteLine("===========End============= " + DateTime.Now);

        }
    }

    public static void ReadError()
    {
        string strPath = @"D:\Rekha\Log.txt";
        using (StreamReader sr = new StreamReader(strPath))
        {
            string line;
            while ((line = sr.ReadLine()) != null)
            {
                Console.WriteLine(line);
            }
        }
      }
   }
  }