Handling and Raising Events .NET Framework 4.5   Other Versions     6 out of 20 rated this helpful - Rate this topic   Events in the .NET Framework are based on the delegate model. The delegate model follows the observer design pattern, which enables…

MySQL的存储过程错误捕获方式和Oracle的有很大的不同. MySQL中可以使用DECLARE关键字来定义处理程序.其基本语法如下: DECLARE handler_type HANDLER FOR condition_value[,...] sp_statement handler_type: CONTINUE | EXIT condition_value: SQLSTATE [VALUE] sqlstate_value | condition_name | SQLWARNING | NO…

事件可以理解为某个对象所发出的消息,以通知特定动作(行为)的发生或状态的改变.行为的发生可能是来自用户交互,如鼠标点击:也可能源自其它的程序逻辑.在这里,触发事件的对象被称为事件(消息)发出者(sender),捕获和响应事件的对象被称作事件接收者. 在事件(消息)通讯中,负责事件发起的类对象并不知道哪个对象或方法会接收和处理(handle)这一事件.这就需要一个中介者(类似指针处理的方式),在事件发起者与接收者之间建立关联.在.NET Framework中,定义了一个特殊的类型(delegate…

https://docs.microsoft.com/en-us/dotnet/api/system.web.ui.webcontrols.customvalidator?view=netframework-4.8 官方的demo使用的是ControlToValidate来关联被检查的控件. OnServerValidate method 通过OnServerValidatef方法来进行服务端的验证. Raises the ServerValidate event for the CustomV…

This article was written about CakePHP 2.x and has been untested with CakePHP 3.x CakePHP seems to get a slightly unfavourable reputation when compared to the likes of Symfony orZend Framework due to its lack of namespaces and not playing nicely with…

I was thinking that the previous post on Events and Delegates was quite self-explanatory. A couple of days ago, I received an email which said that may be it is not that good as to explain what I want to achieve in life through that event. So, I thou…

In my previous post, I spoke about a few very basic and simple reasons of using delegates - primarily callback. In this post, I'll talk about creating Events using delegates. I have tried to annotate the class with comments so that it is easy to comp…

http://www.win.tue.nl/~aeb/linux/lk/lk-12.html 12. Handling of asynchronous events One wants to be notified of various events, like data that has become available, files that have changed, and signals that have been raised. FreeBSD has the nicekqueue…

CakePHP seems to get a slightly unfavourable reputation when compared to the likes of Symfony or Zend Framework due to its lack of namespaces and not playing nicely with Composer out of the box. However, that will change in the forthcoming version 3;…

http://www.codeproject.com/Articles/2357/Console-Event-Handling Console Event Handling Kumar Gaurav Khanna, 29 May 2002    4.59 (46 votes)   Rate this: vote 1vote 2vote 3vote 4vote 5     This article discusses how to handle console-window specific ev…