StackOverflow exception - exception

Question

I am using DDE client to attach and listen stock market prices. That client has a callback method I implemented what to do when it receives price changes. The problem is that I get StackOverflowException (periodically and not at the same time interval). I found something about Thread.BeginCriticalRegion(), but I'm not sure if it would help. I have a few more hours until market opening when I can test it.
I would be more than greatful if someone could give me an idea how to override this exception.
Thanks in advance,
Aleksandar
IList<SymbolObject> _symbols; //initialized when the app runs for the first time
void _ddeClient_Advise(object sender, DdeAdviseEventArgs args)
{
if (!IsReady)
return;
if (string.IsNullOrEmpty(args.Text))
{
_logMessages.LogMessagesAdd("advise dde symbol", string.Format("args.Text is empty or NULL for {0}", args.Item), true);
return;
}
try
{
string[] argsArray = args.Text.Replace("\0", "").Replace('\0'.ToString(), "").Split(' '); // sometimes happens here
var list = _symbols.Where(s => s.DDESymbol == args.Item).ToList();
if (list.Count == 0)
return;
decimal? val = null;
try
{
var stringParts = StringUtils.CleanProphitXUrl(argsArray[0]).Split('.');
argsArray = null;
if (stringParts.Length >= 2)
val = decimal.Parse(stringParts[0] + "." + (stringParts[1].Length > 2 ? stringParts[1].Substring(0, 2) : stringParts[1]));
else
val = decimal.Parse(stringParts[0]);
stringParts = null;
}
catch (Exception ex)
{
_logMessages.LogMessagesAdd("call Price Alerts application service", ex.Message, true);
return;
}
foreach (var l in list)
{
if (_lastPrices[l.DDESymbol] == null)
continue;
if (_lastPrices[l.DDESymbol].ToString() != val.ToString())
{
try
{
_quotePublishingService.PublishQuote(l.DDESymbolId, l.Symbol, args.Item, val, WebSyncPublisherUrl,
PublishingChannel); // a call to wcf service
}
catch (Exception ex)
{
_logMessages.LogMessagesAdd("call the service", ex.Message, true); // save to sql db
return;
}
_lastPrices[l.DDESymbol] = val.ToString();
}
}
list = null;
val = null;
}
catch
{
}
}
public static string CleanProphitXUrl(string value) // StringUtils.CleanProphitXUrl snippet
{
StringBuilder sb = new StringBuilder();
sb.Append(value.Substring(0, value.LastIndexOf(".") + 1));
try
{
value = value.Replace('\r'.ToString(), "").Replace('\t'.ToString(), "").Replace('\n'.ToString(), "");
for (int i = sb.Length; i < value.Length; i++)
{
if (char.IsNumber(value[i]))
sb.Append(value[i]);
}
}
catch
{
}
return sb.ToString();
}

Answer 1

A StackOverflowException is caused by making to many method calls usually resulting from unintended recursion. Based on a cursory check of the code you posted I do not believe it is the culprit. The problem likely lies somewhere else.