exception-handling

问题 I had a problem with catching my exception from Task.Run I changed my code and my problem solved. I'm willing to figure out what is the difference between handling exceptions inside Task.Run in these two ways : In Outside function I can't catch the exception but in Inside I can catch it. void Outside() { try { Task.Run(() => { int z = 0; int x = 1 / z; }); } catch (Exception exception) { MessageBox.Show("Outside : " + exception.Message); } } void Inside() { Task.Run(() => { try { int z = 0;

问题 I had a problem with catching my exception from Task.Run I changed my code and my problem solved. I'm willing to figure out what is the difference between handling exceptions inside Task.Run in these two ways : In Outside function I can't catch the exception but in Inside I can catch it. void Outside() { try { Task.Run(() => { int z = 0; int x = 1 / z; }); } catch (Exception exception) { MessageBox.Show("Outside : " + exception.Message); } } void Inside() { Task.Run(() => { try { int z = 0;

问题 For example, in one place... //---------------a try { // some network call } catch(WebException we) { throw new MyCustomException("some message ....", we); } ...and in another place... //--------------b try { // invoke code above } catch(MyCustomException we) { Debug.Writeline(we.stacktrace); // <---------------- } The stacktrace I print, it only start from a to b, it doesnt include the inner stacktrace from the WebException. How can I print all the stacktrace??? 回答1: I usually use the

问题 For example, in one place... //---------------a try { // some network call } catch(WebException we) { throw new MyCustomException("some message ....", we); } ...and in another place... //--------------b try { // invoke code above } catch(MyCustomException we) { Debug.Writeline(we.stacktrace); // <---------------- } The stacktrace I print, it only start from a to b, it doesnt include the inner stacktrace from the WebException. How can I print all the stacktrace??? 回答1: I usually use the

问题 I see that the Finally in Try .. Catch will always execute after any parts of the execution of the try catch block. Is it any different to just skip the Finally section and just run it after, outside the try catch block? Example 1, Try ... Catch ... Finally ... End Try Try 'Do something Catch ex As Exception 'Handle exception Finally 'Do cleanup End Try Example 2, Try ... Catch ... End Try ... Do the finally stuff outside Try 'Do something Catch ex As Exception 'Handle exception End Try 'Do

问题 Mentally, I've always wondered how try/throw/catch looks behind the scenes, when the C++ compiles translates it to assembler. But since I never use it, I never got around to checking it out (some people would say lazy). Is the normal stack used for keeping track of try s, or is a separate per-thread stack kept for this purpose alone? Is the implementation between MSVC and g++ big or small? Please show me some pseudo asm (IA-32 is ok too) so I never have to check it out myself! :) Edit: Now I

问题 I have been working on this program for quite sometime and my brain is fried. I could use some help from someone looking in. I'm trying to make a program that reads a text file line by line and each line is made into an ArrayList so I can access each token. What am I doing wrong? import java.util.*; import java.util.ArrayList; import java.io.*; import java.rmi.server.UID; import java.util.concurrent.atomic.AtomicInteger; public class PCB { public void read (String [] args) { BufferedReader

问题 I'm currently working on a node.js app and I'm having the usual asynchronous code issue. I'm implementing a service server on top of Node's HTTP module. This server supports (express like) routes. For example I have code that looks like this: server.any("/someRoute",function(req,resp){ resp.end("this text is sent to clients via http") }); The server needs to be able to withstand failure, I do not want to crash the whole server when there is a problem in a function passed to any. The problem

问题 I'm currently in the process of writing my first Windows Forms application. I've read a few C# books now so I've got a relatively good understanding of what language features C# has to deal with exceptions. They're all quite theoretical however so what I haven't got yet is a feel for how to translate the basic concepts into a good exception-handling model in my application. Would anyone like to share any pearls of wisdom on the subject? Post any common mistakes you've seen newbies like myself

问题 I'm currently in the process of writing my first Windows Forms application. I've read a few C# books now so I've got a relatively good understanding of what language features C# has to deal with exceptions. They're all quite theoretical however so what I haven't got yet is a feel for how to translate the basic concepts into a good exception-handling model in my application. Would anyone like to share any pearls of wisdom on the subject? Post any common mistakes you've seen newbies like myself