c# error handling best practices

Tags: Oracle 11g RACORA-01555 snapshot is too old, is a common error in the database, such as when our transaction needs to use Undo to build a CR block,And at this time the corresponding undo no longer exists, this time will be reported ORA-01555 error.Environment is Oracle 11g RAC because the customer executes a more complex SQL, the error occurs after 88 minutes of running with Plsql, which is a SQL to v

In fact, for C # exception handling everyone is not unfamiliar, but for WEIAPI on the exception handling in fact and the traditional exception processing is not very different, but through encapsulation can make the exception more friendly, https://docs.microsoft.com/en-us/aspnet/ Web-api/overview/error-

check the error value, very inconvenient, but also easy to double the program size (but to precisely control the logic, I think this is a good way). In the third case, it is easy to mislead the caller, in case the caller does not check the global variable errno or otherwise checks the error, it is a disaster, and this method does not work well in concurrent situations. As for the fourth situation, I feel l

In some cases, we need to define our own exceptions and throwDefine an error First:1 class Myerror (baseexception): 2 def __init__ (self): 3 PassThe above defines a class called Myerror, which inherits from Baseexception. In Python, all errors are inherited from Baseexception, which is equivalent to all exceptions in C # that inherit from exception. Next, an empty constructor is defined.So how d

1.linux install MySQL appears could not find Curses (missing curses_library Curses_include_path)Workaround:[[email protected] mysql-5.5.11] #rm CMakeCache.txt[[email protected] mysql-5.5.11] #yum install Ncurses-devel[[email protected] mysql-5.5.11] #yum Install Bison2.CMake Error at/usr/share/cmake/modules/cmakecxxinformation.cmake:17 (get_filename_component):CMake Error:cmake_cxx_compiler not set, after EnablelanguageCMake error:internal CMake

1, C language Exception handling 1.1, the concept of abnormalException: The program may produce an exception during operation (the execution branch is expected when the program runs), such as: run-time in addition to 0 cases, the need to open an external file does not exist, the array access is out of bounds ...Bug:bug is an error in the program, is not expected

Abstract People are not sages. Code is written by humans, and of course it cannot be error-free. We can only expect that the code is more robust and not perfect. What we can do more is how to recover from errors or find alternative solutions. CLR provides an exception handling mechanism, which not only allows people to handle exceptions more elegantly when code errors occur, but also throws exceptions when

Let's take a look at exception handling today, before we look at exception handling in C + +, let's see the exception handling in the language. So what is an anomaly? An exception may occur during program operation,the exception (Exception) differs from a bug in that the exception is an execution branch that is expecte

There was a detailed introduction to the Java call IDL, http://www.cnblogs.com/lizhishan3380/p/4353286.html, which mentions " The Java Package (Javaidlb.jar) for IDL needs to be loaded in Java first.Later found that different people load javaidlb.jar in different ways, there will be some errors.First load mode: Loaded in eclipse from the installation directory of IDL via build path,configure build Path,add external jars (C:\Program files\exelis\idl82\

attributes. An overview and a list of all the features can be found on the Apple developer relationship site. The following is a basic example: var req; function postXML(xmlDoc) { 　if (window.XMLHttpRequest) req = new XMLHttpRequest(); 　else if (window.ActiveXObject) req = new ActiveXObject("Microsoft.XMLHTTP"); 　else return; // 失败了 　req.open(method, serverURI); 　req.setRequestHeader(’content-type’, ’text/xml’); 　req.onreadystatechange = xmlPosted; 　req.send(xmlDoc); } function xmlPosted() { 　

according to the actual situation, the connection onceArchived logs under Oracle can be used for data recovery in the event that other online logs are lost, so they are typically turned on in the production environment, but if some unused or historically archived logs are not cleaned up, a full flashback zone will cause a connection exception. Of course, you need to pay attention to clean up Oracle's archive log cleanup, and write a script that cleans up Oracle's archived logs on a daily schedu

exception, which we call an exception capture.The new C + + keyword throw is used to throw exceptions, new keywords are catch used to catch exceptions, and new try keywords try to catch exceptions. You typically place the statement that you are trying to capture in a try{ } block, and the exception-handling statement catch{ } in a statement block.Exception handling