由网友(眼眶已哭红)分享简介：我有一个基本的OOP问题：I have a basic oop question:我在操作一个新构造的开始（在SharePoint开发为例）使用，但后来没有。例如：I use (for example in the sharepoint development) at the beginning of an op...

我有一个基本的OOP问题：

I have a basic oop question:

我在操作一个新构造的开始（在SharePoint开发为例）使用，但后来没有。例如：

I use (for example in the sharepoint development) at the beginning of an operation a New constructor, but later not. For example:

' CREATES A INSTANCE OF SPSITE FROM GIVEN URL '
Dim site As spsite = New spsite("http://myhost")

' HERE I DO NOT NEED TO USE NEW(...) AND IT RETURNS AN SPSITE OBJECT, '
' A NEW SPSITE OBJECT '
Dim web As spweb = site.openweb()

我的问题：为什么我需要在网站上的第一个对象使用新的，并在第二行不是

My question: Why do i need at the first object of site the use of new, and in the second line not!?

推荐答案

我真的不明白你的问题，但如果两条线是在code（以及他们应该是），那么它的工作原理是这样的： 这第一行创建一个新的SPSite对象，您可以与命名变量访问：网站

I don't really understand your problem, but if both lines are in your code (and they should be) then it works like this: This first line creates a new spsite object, which you can access with the variable named: site

dim site as spsite = new spsite("http://myhost")

下面创建一个新的SPWeb变量，通过调用pviously创建的网站变的$ P $的openweb（）方法。这是一个函数调用。此函数返回的SPWeb实例，所以你不需要一个新的。

Here you create a new spweb variable, by invoking the openweb() method of your previously created site variable. This is a function call. this function returns an spweb instance so you don't need a new one.

dim web as spweb = site.openweb()

openweb（）或者有一个新的SPWeb（）里面，或者新的SPSite（myhost的）创建了一个新openweb你（这个你不必知道，你才知道，你会得到一个的SPWeb对象）

openweb() either has a new spweb() inside it, or the new spsite("myhost") created a new openweb for you (this you don't have to know, you just know, you'll get an spweb object)