ToDebugString() – give me some debug info about my object, e.g. Request.Url

by Oliver 16. September 2011 20:06

Lately, I was having trouble debugging certain parts of my code in Visual Studio, and all I wanted to know was the value of some variable at some point in time. Well, I’d use some logging if I could just get at that value easily. But for some objects I don’t really know what I’m looking for or where I should be looking for it. So just give me the values of all the members of that object, will ya? And could you recurse that? But no deeper than 3 levels, alright? Or let’s say… 5? public static string ToDebugString(this object obj, int maxdepth, int depth=0) { if (obj == null) return "null";   if (obj is IConvertible) return obj.ToString();   if (depth >= maxdepth) return "...";   var sb = new StringBuilder();   if (depth > 0) sb.AppendLine();   foreach (var propertyInfo in obj.GetType().GetProperties(BindingFlags.Public|BindingFlags.Instance)) { sb.Append(new string(' ', 2*depth)).Append(propertyInfo.Name).Append(": "); try { var value = propertyInfo.GetValue(obj, new object[0]); sb.AppendLine(ToDebugString(value, maxdepth, depth + 1)); } catch (Exception ex) { sb.AppendLine(string.Format("[{0}]", ex.Message)); } }   // remove newline from end of string var newLine = Environment.NewLine; if (sb.Length >= newLine.Length) sb.Replace(newLine, "", sb.Length - newLine.Length, newLine.Length);   return sb.ToString(); } With this little helper I can now simply call anyobject.ToDebugString(4 /* maxdepth */) and I get a nicely formatted debug view of that object; e.g. Request.Url.ToDebugString(3) gives me: AbsolutePath: /logg.aspxAbsoluteUri: http://localhost:55235/logg.aspxAuthority: localhost:55235Host: localhostHostNameType: DnsIsDefaultPort: FalseIsFile: FalseIsLoopback: TrueIsUnc: FalseLocalPath: /logg.aspxPathAndQuery: /logg.aspxPort: 55235Query: Fragment: Scheme: httpOriginalString: http://localhost:55235/logg.aspxDnsSafeHost: localhostIsAbsoluteUri: TrueSegments: Length: 2 LongLength: 2 Rank: 1 SyncRoot: Length: 2 LongLength: 2 Rank: 1 SyncRoot: ... IsReadOnly: False IsFixedSize: True IsSynchronized: False IsReadOnly: False IsFixedSize: True IsSynchronized: FalseUserEscaped: FalseUserInfo: Nice Right now this method chokes on indexed properties but once I’ll need it I’ll go and look for a way to include them. It also chokes any exceptions on the way to just get the job done. Happy coding!

Memory-Leak vs. Memory Waste

by robert 15. April 2010 14:55

kurzer Nachtrag zum vorherigen Post. Eigentlich kann management Code für sich keine Memory-Leak haben. Es ist lediglich möglich Speicher schlecht zu nutzen, in dem er zum Beispiel zu lange gehalten wird. Technisch ist das kein Memory-Leak. Nur unmanaged Code kann nicht mehr verwalteten Speicher zurück lassen. Deswegen suchen wir streng genommen vermutlich eher nach "Memory-Waste"!

About Oliver code blog logo I build web applications using ASP.NET and have a passion for jQuery. Enjoy MVC 4 and Orchard CMS, and I do TDD whenever I can. I like clean code. Love to spend time with my wife and our daughter. My profile on Stack Exchange, a network of free, community-driven Q&A sites

About Anton code blog logo I'm a software developer at teamaton. I code in C# and work with MVC, Orchard, SpecFlow, Coypu and NHibernate. I enjoy beach volleyball, board games and Coke.