跟踪未处理的asp.net异常

Question

We have an asp.net web application and for one of our users, an exception is thrown on a specific page when they click on a button. I have not been able to recreate this issue, but the system is logging an exception when the client gets the exception. The problem is, I don't know where the exception is being generated. When we log an exception, we call the ToString() method on the exception to get the stack trace. It's a parsing error, but I can't tell where it's coming from. Here's the exception as we logged it:

System.FormatException: Input string was not in a correct format.
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) at System.ComponentModel.Int32Converter.FromString(String value, NumberFormatInfo formatInfo) at System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)

I assume this is being logged by the following code in the Global.asax

void Application_Error(object sender, EventArgs e) 
    {
        // Code that runs when an unhandled error occurs
        if (Server.GetLastError() != null)
        {
            Exception objErr = Server.GetLastError().GetBaseException();
            objErr.WriteExceptionLog();
        }
    }

However, I don't know where this code is getting called from or how to find out. Any ideas on where I can look or if I need to do something different when I'm logging the exception?

Answer 1

Here you go:

void Application_Error(object sender, EventArgs e) 
{
    // Code that runs when an unhandled error occurs
    if (Server.GetLastError() != null)
    {
        Exception err = Server.GetLastError().InnerException;

        // handle error here

        Server.ClearError();
    }
}