c# - 如何在发生异常时跟踪所有局部变量

Question

当方法中发生异常时，有什么通用方法可以跟踪/记录所有局部变量的值？(在 C# 3 中)

Answer 1

答案:使用 PostSharp(策略注入(inject))、XTraceMethodBoundary 属性，覆盖 OnException 。这记录了所有方法输入和返回参数的类型和值。我修改了 PostSharp 以添加一个简单的方法来记录参数。不完美但足够好

private static void TraceMethodArguments(MethodExecutionEventArgs eventArgs)
{
    object[] parameters = eventArgs.GetReadOnlyArgumentArray();

    if (parameters != null)
    {
        string paramValue = null;
        foreach (object p in parameters)
        {
            Type _type = p.GetType();
            if (_type == typeof(string) || _type == typeof(int) || _type == typeof(double) || _type == typeof(decimal))
            {
                paramValue = (string)p;
            }
            else if (_type == typeof(XmlDocument))
            {
                paramValue = ((XmlDocument)p).OuterXml;
            }
            else
            { //try to serialize
                try
                {
                    XmlSerializer _serializer = new XmlSerializer(p.GetType());
                    StringWriter _strWriter = new StringWriter();

                    _serializer.Serialize(_strWriter, p);
                    paramValue = _strWriter.ToString();
                }
                catch
                {
                    paramValue = "Unable to Serialize Parameter";
                }
            }
            Trace.TraceInformation("[" + Process.GetCurrentProcess().Id + "-" + Thread.CurrentThread.ManagedThreadId.ToString() + "]" + " Parameter: " + paramValue);
        }
    }
}