exception-handling

问题 I want to create an error class. And it has some static properties. For example : Message , InnerException , Stacktrace , Source . But I want to add some dynamic properties. If exception is a FileNotFoundException , I want to add FileName property. Or if it is a SqlException , I want to add LineNumber property. And I can't inherit that class from Exception because, I return that class from a web service. How can I do that? 回答1: you can create type dynamically using new features in C# like

问题 This question already has answers here : Globally catch exceptions in a WPF application? (6 answers) Closed 3 years ago . Sometimes, under not reproducible circumstances, my WPF application crashes without any message. The application simply close instantly. Where is the best place to implement the global Try/Catch block. At least I have to implement a messagebox with: "Sorry for the inconvenience ..." 回答1: You can handle the AppDomain.UnhandledException event EDIT: actually, this event is

问题 The link http://gotw.ca/gotw/066.htm states that Moral #1: Constructor function-try-block handlers have only one purpose -- to translate an exception. (And maybe to do logging or some other side effects.) They are not useful for any other purpose. While http://www.parashift.com/c++-faq-lite/exceptions.html#faq-17.8 If a constructor throws an exception, the object's destructor is not run. If your object has already done something that needs to be undone (such as allocating some memory, opening

问题 Just recently Xcode 4 has stopped breaking on exceptions. Every exception causes the debugger to stop at UIApplicationMain with no stack trace. I have a breakpoint set on objc_exception_throw (confirmed by GDB logs) Breakpoints are turned on (confirmed by GDB and other breakpoints work fine) LLVM GCC 4.2 is my compiler Enable Objective-C Exceptions is turned on Are there any reasons breakpoints may not be working? Any flags I'm missing? 回答1: In Xcode 4, you add the breakpoint for exceptions

问题 I am trying to save an XDcoument to a thumb drive which doesnt have enough memory space available. (This is a special test condition for the app) Though the application is giving an exception like below, I cant get that in the try catch block around the XDocument.Save(filePath). Looks like it is a delayed throw. Is it a LINQ issue or am I doing something wrong?. alt text http://img211.imageshack.us/img211/8324/exce.png System.IO.IOException was unhandled Message="There is not enough space on

问题 I'm looking to clean up the exception mess that is currently the code base I'm working on. The basic setup is this. I have an interface that is implemented by a lot of classes that looks like this: public interface TerminalMessage<E> { // Override for specific return data type. public E send(TerminalStream stream) throws Exception; } These classes throw a lot of different exceptions, like IOException, InterruptedException etc. As it is now, all I do is call getMessage() on the catched

问题 This question already has answers here : How to get Exception Error Code in C# (5 answers) Closed 6 years ago . Is there a way that i can get the corresponding error code of an Exceptions ? I need the thrown exceptions error code instead of its message , so that i based on the error code i show the right message to the user. 回答1: If you're looking for the win32 error code, that's available on the Win32Exception class catch (Win32Exception e) { Console.WriteLine("ErrorCode: {0}", e.ErrorCode);

问题 When I run the code below for the GetWindowText I get the following error thrown as an inner Exception: {"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."} [DllImport("user32.dll", EntryPoint = "GetWindowTextLength", SetLastError = true)] internal static extern int GetWindowTextLength(IntPtr hwnd); [DllImport("user32.dll", EntryPoint = "GetWindowText", SetLastError = true)] internal static extern int GetWindowText(IntPtr hwnd, ref

问题 I'm working on an application where the process goes on like this UI --> backend process --> result to UI. In my Java code, I have handled my exceptions using try-catch, But in the code I have so many repeated exceptions that may throw same exceptions in different classes, which reduces the readability and code reuse. So, I am planning to do a exception handling strategy so that instead of throwing the same exception in different classes, I need to organize the exception and reuse the

问题 I don't know what the heck I'm doing wrong here, I wrote have an RPC client trying to connect to a non-existent server, and I'm trying to handle the exception that is thrown, but no matter what I try I can't figure out how I'm supposed to handle this: def _get_rpc(): try: a = ServerProxy('http://dd:LNXFhcZnYshy5mKyOFfy@127.0.0.1:9001') a = a.supervisor return a except: return False rpc = _get_rpc() if not rpc: print "No RPC" Since there is no server running, I would expect the output to be