[Implementing a Dispose method] 1.实现System.IDsiposable.Dispose()方法.不能将此方法设置为virtual,子类不能override此方法.此方法的实现必须为如下代码. // Implement IDisposable. // Do not make this method virtual. // A derived class should not be able to override this method. public voi…

//这段代码来自官方示例,删除了其中用处不大的细节using System; using System.ComponentModel; /*** * 这个模式搞的这么复杂,目的是:不管使用者有没有手动调用Dipose函数,都能保证托管资源被正确释放,但非托管资源不管,因为非托管资源只能由用户保证 * 1,若用户手动调用Dispose(),则Dipose(true)被调用,托管与非托管一起释放了,同时告诉GC不要再执行析构函数 * 2,若用户没有手动调用Dispose()函数,则析构函数最终会被执…

实现 Dispose 方法 MSDN 类型的 Dispose 方法应释放它拥有的所有资源.它还应该通过调用其父类型的 Dispose 方法释放其基类型拥有的所有资源.该父类型的 Dispose 方法应该释放它拥有的所有资源并同样也调用其父类型的 Dispose 方法,从而在整个基类型层次结构中传播此模式.若要确保始终正确地清理资源,Dispose 方法应该可以被多次调用而不引发任何异常. 要点 C++ 程序员不应该使用本主题.而应参见 Destructors and Finalizers in…

前言  最近实施的同事报障,说用户审批流程后直接关闭浏览器,操作十余次后系统就报用户会话数超过上限,咨询4A同事后得知登陆后需要显式调用登出API才能清理4A端,否则必然会超出会话上限.  即使在页面上增添一个登出按钮也无法保证用户不会直接关掉浏览器,更何况用户已经习惯这样做,增加功能好弄,改变习惯却难啊.这时想起N年用过的window.onbeforeunload和window.onunload事件.  本文记录重拾这两个家伙的经过,以便日后用时少坑. 为网页写个Dispose方法  C#中我…

I ran into a question on stackoverflow the other day that sort of shocked me. It was a piece of code, with the author asking why it wasn't a factory pattern. The thing that shocked me was that the pattern that everyone was agreeing was a factory meth…

前言 最近实施的同事报障,说用户审批流程后直接关闭浏览器,操作十余次后系统就报用户会话数超过上限,咨询4A同事后得知登陆后需要显式调用登出API才能清理4A端,否则必然会超出会话上限. 即使在页面上增添一个登出按钮也无法保证用户不会直接关掉浏览器,更何况用户已经习惯这样做,增加功能好弄,改变习惯却难啊.这时想起N年用过的window.onbeforeunload和window.onunload事件. 本文记录重拾这两个家伙的经过,以便日后用时少坑. 为网页写个Dispose方法 C#中我们会将释…

Like an array, Observable has a map method that allows us to transform a sequence into a new Observable. var Observable = Rx.Observable; //Create click events by Observable var clicks = Observable.fromEvent(button, 'click'); var points = clicks.map(f…

The improved Quicksort method of the present invention utilizes two pointers initialized at opposite ends of the array or partition to be sorted and an initial partition value Pvalue located at the center of the array or partition. The value at each…

实现方式用的是设计模式里的模板模式,基类先搭好框架,子类重写void Dispose(bool disposing) 即可. 需要注意的是基类的Finalize函数也就是析构函数调用的是虚函数void Dispose(bool disposing);而子类如果重写了这个虚函数,当析构子类对象时会调用到父类的析构函数,此时父类析构函数调用的是父类自己的Dispose(bool)版本还是子类重写了的Dispose(bool)版本?在C++中,是父类自己的Dispose(bool)版本.也就是虚函数在…

1. Does SqlCommand.Dispose close the connection? 问 Can I use this approach efficiently? using(SqlCommand cmd = new SqlCommand("GetSomething", new SqlConnection(Config.ConnectionString)) { cmd.Connection.Open(); // set up parameters and CommandTy…

RAC学习笔记 ReactiveCocoa(简称为RAC),是由Github开源的一个应用于iOS和OS开发的新框架,Cocoa是苹果整套框架的简称,因此很多苹果框架喜欢以Cocoa结尾. 在学习ReactiveCocoa之前,先学习一下概念 ReactiveCocoa 是一套开源的基于Cocoa的FRP框架 .FRP的全称是Functional Reactive Programming,中文译作函数式响应式编程,是RP(Reactive Programm,响应式编程)的FP(Functiona…

From time to time, I receive questions from developers which highlight either a need for more information about the new “async” and “await” keywords in C# and Visual Basic. I’ve been cataloguing these questions, and I thought I’d take this opportunit…

首先,重构的想法来源于以下文章:Correct use of Repository and Unit Of Work patterns in ASP.NET MVC,因为我发现在我的框架中,对UnitOfWork使用了错误的设计方法,同时感谢一下文章:Generically Implementing the Unit of Work & Repository Pattern with Entity Framework in MVC & Simplifying Entity Graphs,我…

A abstract class An abstract class is a class that must be inherited and have the methods overridden. It can not be instantiated. And at least one of the methods in the class is abstract. Array, ArrayList, BitArray An array is a collection of related…

1.A type that defines an event member allows the type (or instances of the type) to notify other objects that something special has happened 2.defining an event member means that a type is offering the following capabilities: 1.A method can register…

http://www.oracle.com/technetwork/java/javase/documentation/index-137868.html This document describes the style guide, tag and image conventions we use in documentation comments for Java programs written at Java Software, Oracle. It does not rehash r…

由于使用别人的Dll,导出的是一个实体类,在C#里封送很难,百度下,有个朋友回复一篇英文的,虽然不一定使用,但可以作为一个知识点,现把原文贴下: c#调用C++写的dll导出类,包含继承,重载等详细介绍(转载)忘了出处 Inheriting From a Native C++ Class in C# Hi, this is Jim Springfield, an architect on the Visual C++ team.  I have blogged in the past about…

每个对象只有在该对象不存在任何引用才会被垃圾回收起回收. 可以调用静态方法System.GC.Collect()垃圾回收器,但是不建议这么做: 用using语句可以有效的自动释放掉资源. 实在没有办法才用从析构函数中调用Dispose方法. class Example:IDisposable ~example(){ Dispose(); } public virtual void Dispose(); { if(!this.disposed){ try{ //在此释放稀缺资源 } finally…

定义一种释放分配的资源的方法. 命名空间:  System程序集:  mscorlib(在 mscorlib.dll 中) 语法 C# C++ F# VB [ComVisibleAttribute(true)] public interface IDisposable IDisposable 类型公开以下成员. 方法 名称 说明 Dispose 执行与释放或重置非托管资源相关的应用程序定义的任务. 此接口的主要用途是释放非托管资源. 当不再使用托管对象时,垃圾回收器会自动释放分配给该对象的内存.…

https://msdn.microsoft.com/en-us/library/ff647787.aspx Retired Content This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This page may contain URLs that we…

本文内容为转载,重新排版以供学习研究.如有侵权,请联系作者删除. 转载请注明本文出处:Professional C# 6 and .NET Core 1.0 - 37 ADO.NET ------------------------------- What's In This Chapter? Connecting to the database Executing commands Calling stored procedures The ADO.NET object model Wrox.…

In C#, a class can define own events and other classes can register it to be notified when something happen. This is useful for a desktop application or standalone windows service. But, for a web application it's a bit problematic since objects are c…

1. Detecting Performance Issues 2. Scripting Strategies 3. The Benefits of Batching 4. Kickstart Your Art 5. Faster Physics 6. Dynamic Graphics 7. Masterful Memory Management 8. Tactical Tips and Tricks 1. Detecting Performance Issues  The Unity Prof…

来自MSDN官方文档:http://msdn.microsoft.com/en-us/library/system.configuration.provider.providercollection.aspx using System; using System.ComponentModel; // The following example demonstrates how to create // a resource class that implements the IDisposabl…

IDisposable has been around since the beginning of .Net.The basic premise is simple.. Developers dont need to manage memory now. The 'Garbage Collector' takes care of reclaiming memory for you.. However the GC is non-deterministic.. you can't predict…

Axiom主要的代码大致翻看了下,就想到了自己来模拟一下游戏开发. 这章主要包括创建窗口及3D渲染的一些基本元素,并添加一个第三人称的骨骼动画作主角,加上前文中修改过后的地形组件,能用鼠标和键盘进行漫游.如下图所示. 在Axiom上给出的例子中,可以选择是用OpenGL或是DirectX渲染,现在有问题的地方是如果用OpenGL渲染,而Axiom鼠标与键盘输入采用的是SharpInputSystem,这个在DirectX渲染下是没有问题的,但是在OpenGL渲染的窗口下得不到正确的鼠标位置.而D…

Before starting with best practices tobe followed, it is good to have clear understanding of how memory is managed (allocation, de-allocation). So, let us start with memory management first. Managed Heap and Garbage Collection Overview Memory Allocat…

Axiom3D程序的基本渲染流程 #region Namespace Declarations using System; using System.Linq; using Axiom.Core; using Axiom.Framework.Configuration; using Axiom.Graphics; using Vector3 = Axiom.Math.Vector3; #endregion Namespace Declarations namespace Axiom.Framew…

Build 4.0.0.Alpha1 =============================   ** Known BREAKING CHANGES from NH3.3.3.GA to 4.0.0       NHibernate now targets .Net 4.0. Many uses of set types from Iesi.Collections have     now been changed to use corresponding types from the BC…

Or, “Avoiding Memory Leaks in Managed Composition” Understanding lifetime can be pretty tough when you’re new to IoC. Even long-time users express vague fears and misgivings when it comes to this subject, and disconcerting issues – components not bei…