exception-handling

问题 I want to check if a folder exists and if not then create it. But I don't know if the path supplied will even valid. When the path is not valid the following happens. string path = "this is an invalid path"; if (!Directory.Exists(path)) Directory.CreateDirectory(path); //Exception thrown here If you supply an invalid path, it will throw a DirectoryNotFoundException exception. How can I stop this exception from occurring? I don't want to use a try-catch. I want to detect that this exception

问题 String[] values = line.split(","); Long locId = Long.parseLong(replaceQuotes(values[0])); String country = replaceQuotes(values[1]); String region = replaceQuotes(values[2]); String city = replaceQuotes(values[3]); String postalCode = replaceQuotes(values[4]); String latitude = replaceQuotes(values[5]); String longitude = replaceQuotes(values[6]); String metroCode = replaceQuotes(values[7]); String areaCode = replaceQuotes(values[8]); //... public String replaceQuotes(String txt){ txt = txt

问题 Does Linux provide an exception handling in C without resorting to C++? Or, what might be the best way to implement such an exception handling? The goal is to avoid to check return codes for every function called, but do something like in C++ that is thread safe and easily portable. 回答1: I've never heard of Linux providing anything like that, but this page describes a third-party exception handling library for C: http://www.on-time.com/ddj0011.htm I haven't been able to find the download link

问题 I am wondering can try..catch force execution to go into the catch and run code in there? here example code: try { if (AnyConditionTrue) { // run some code } else { // go catch } } catch (Exception) { // run some code here... } 回答1: Rather than throwing an Exception in the else , I would recommend extracting the code from your catch into a method and call that from your else try { if (AnyConditionTrue) { MethodWhenTrue(); } else { HandleError(); } } catch(Exception ex) { HandleError(); } 回答2:

问题 I'm looking at some code in an application of ours and came across something a little odd from what I normally do. With exception handling and cleanup, we (as well as many other programmers out there, I'm sure) use a Try/Finally block embedded with a Try/Except block. Now I'm used to the Try/Except inside the Try/Finally like so: Try Try CouldCauseError(X); Except HandleError; end; Finally FreeAndNil(x); end; but this other block of code is reversed as so: Try Try CouldCauseError(X); Finally

问题 I'm occasionaly getting the following popup from an AJAX.NET application Sys.WebForms.PageRequestManagerServerErrorException: An Unknown error occurred while processing the request on the server. The status code returned from the server was: 12031 From the Microsoft kb that status code indicates a ERROR_INTERNET_CONNECTION_RESET, but it doesn't state what was the underlying issue the triggered the error in the first place. How can I log/trace/etc the underlying error that generated the popup?

问题 I'm occasionaly getting the following popup from an AJAX.NET application Sys.WebForms.PageRequestManagerServerErrorException: An Unknown error occurred while processing the request on the server. The status code returned from the server was: 12031 From the Microsoft kb that status code indicates a ERROR_INTERNET_CONNECTION_RESET, but it doesn't state what was the underlying issue the triggered the error in the first place. How can I log/trace/etc the underlying error that generated the popup?

问题 Some one please tell me how to handle RunTimeExceptions in grails version1.1 .I have followed the following tutorial.I could not get it working. http://blog.bruary.net/2008/03/grails-custom-exception-handling.html I have MyException which extends RunTimeException .If this particular exception comes I want show different error page.Is it possible to achieve in grails 1.1 version? 回答1: Can you provide some sample code, where some RuntimeException is thrown? It is difficult to answer your

问题 When a thread throws an exception that is unhandled, it terminates. What is the proper way to handle exceptions thrown on threads and how to propogate relevant exception data to other parts of the code that would need to subscribe to notifications? Is there an INotifyThreadPoorlyDesigned interface that I missed somewhere? Same applies for how to handle stuff dispatched to the WPF UI. 回答1: To handle work that throws an exception on a dispatcher thread, simply hook the Application:

问题 I use HTTP requests to get data for my Vue.js application. I have one file called Api.js with the base axios instance: export default () => { return axios.create({ baseURL: apiURL, headers: { Authorization: `JWT ${store.state.token}` } }) } than I have a file called service.js , which contains the functions for the different endpoints: export default { status() { return Api().get('status/') } } In the .vue file I call the method like that. created() { Service.status() .then(response => { //