Log4Net doesn't log custom exception correct - log4net

Question

I'm using log4net and logging exceptions. but i want to log current object on exception time but i couldn't.
I created exception and add object to exception's data property then log exception by log4net. log4net's exceptions message doesn't contain my object.
my code such as;
try
{
Exception exp = new Exception("critical error");
exp.Data.Add("Eror Object", viewModel);
throw exp;
}
catch (Exception exp)
{
_logManager.Error(exp);
}
my viewModel object;
[Serializable]
public class CartTransferViewModel
{
public CartTransferViewModel()
{
Model = new ModelObject();
}
public ModelObject Model { get; set; }
public string InformatinMessage { get; set; }
public bool? IsActive { get; set; }
}
And my Model object serializable too. but log4Net's exception message like this;
System.Exception: critical error
at FooProject.FooClass.FooMethod() in d:\FooProject\FooClass.cs:line 200
I'm remove serializable attribute then re run my application, error code did change to;
System.ArgumentException: Argument passed in is not serializable.
Parameter name: value
at System.Collections.ListDictionaryInternal.Add(Object key, Object value)
at FooProject.FooClass.FooMethod() in d:\FooProject\FooClass.cs:line 200
How to log my custom exception with my objects?

Answer 1

Ok ,if i got your question. i do the something similar . i use logger to write the exception . But i use Exception.Data property.
here is the example , example contains
1) Info class , which needs to be written
2) Sample class with method , write infoclass when exception happens
3) Utility class which formats the exception
[Serializable]
public class FlatFileItem
{
ArrayList errorlist = new ArrayList();
public FlatFileItem()
{
if (errorlist == null) { errorlist = new ArrayList(); }
}
//Name of the file
public string FileName { get; set; }
public override string ToString()
{
return string.Format(#"FlatFileItem (Unzip FTPLineItem) => FileName:{0}", this.FileName);
}
}
public class someclass {
public void somemethod(){
try{
// throw exception here
} catch (Exception ex)
{
ex.Data["flatfile"] = Convert.ToString(flatfile); //Using data property
flatfile.HasErrors = true; //not there in above example
flatfile.Parent.AddErrorInfo(ex); //not there in above example
logger.Error(String.Format(ex.Message)); //not there in above example
throw ( new Exception ("yourmsg",ex)); //if you want to do this
}
}
}
//Now i use this utility method to write out everything at very top level exception
public class ExceptionInfoUtil
{
public static string GetAllExceptionInfo(Exception ex)
{
StringBuilder sbexception = new StringBuilder();
int i = 1;
sbexception.Append(GetExceptionInfo(ex, i));
while (ex.InnerException != null)
{
i++;
ex = ex.InnerException;
sbexception.Append(GetExceptionInfo(ex, i));
}
return sbexception.ToString();
}
private static string GetExceptionInfo(Exception ex, int count)
{
StringBuilder sbexception = new StringBuilder();
sbexception.AppendLine(string.Format(""));
sbexception.AppendLine(string.Format(""));
sbexception.AppendLine(string.Format("************************************************"));
sbexception.AppendLine(string.Format("************************************************"));
sbexception.AppendLine(string.Format(" Inner Exception : No.{0} ", count));
sbexception.AppendLine(string.Format("************************************************"));
sbexception.AppendLine(string.Format("=================================================="));
sbexception.AppendLine(string.Format(" Error Message : {0} ", ex.Message));
sbexception.AppendLine(string.Format("=================================================="));
#region Mine Thru data dictionary
try
{
sbexception.AppendLine(string.Format("=================================================="));
sbexception.AppendLine(string.Format(" Data parameters Count at Source :{0}", ex.Data.Count));
sbexception.AppendLine(string.Format("=================================================="));
string skey = string.Empty;
foreach (object key in ex.Data.Keys)
{
try
{
if (key != null)
{
skey = Convert.ToString(key);
sbexception.AppendLine(string.Format(" Key :{0} , Value:{1}", skey, Convert.ToString(ex.Data[key])));
}
else
{
sbexception.AppendLine(string.Format(" Key is null"));
}
}
catch (Exception e1)
{
sbexception.AppendLine(string.Format("** Exception occurred when writting log *** [{0}] ", e1.Message));
}
}
}
catch (Exception ex1)
{
sbexception.AppendLine(string.Format("** Exception occurred when writting log *** [{0}] ", ex1.Message));
}
#endregion
sbexception.AppendLine(string.Format("=================================================="));
sbexception.AppendLine(string.Format(" Source : {0} ", ex.Source));
sbexception.AppendLine(string.Format("=================================================="));
sbexception.AppendLine(string.Format(" StackTrace : {0} ", ex.StackTrace));
sbexception.AppendLine(string.Format("=================================================="));
sbexception.AppendLine(string.Format(" TargetSite : {0} ", ex.TargetSite));
sbexception.AppendLine(string.Format("************************************************"));
sbexception.AppendLine(string.Format(" Finished Writting Exception info :{0} ", count));
sbexception.AppendLine(string.Format("************************************************"));
sbexception.AppendLine(string.Format("************************************************"));
sbexception.AppendLine(string.Format(""));
sbexception.AppendLine(string.Format(""));
return sbexception.ToString();
}
}