您可以在使用块内处理多个对象？ [英] Can you dispose of multiple objects within a Using block?

问题描述

如何在使用声明中得到处理了吗？要照顾多个对象

How to take care of multiple objects getting disposed off in a Using statement?

样品code

using(MyClass obj = new MyClass())
{
    MyOtherClass objOC= new MyOtherClass()
    TextReader objTR = new StringReader(...);  
    // other code
}

MyClass的OBJ 将被设置在使用块结束，但后来怎么样 MyOtherClass objOC 和的TextReader objTR 。据我所知，他们不会得到处置，所以我应该有一个嵌套使用块存在，这样下面？我需要一个真正的宽屏幕显示器，如果对象的数量增加

MyClass obj will be be disposed at the end of the Using block, but then what about MyOtherClass objOC and TextReader objTR. As far as I know it they wont get disposed, so should I be having a nested Using block there, like this below? I will need a real wide screen monitor if the number of objects increase

下面是正确的？这个

using(MyClass obj = new MyClass())
{
    using (MyOtherClass objOC= new MyOtherClass())
    {
        using (TextReader objTR = new StringReader(...))
        {
           //code using all three objects 
        }   
    } 
    // other code using just `MyClass obj`
}

MyClass的＆放大器; MyOtherClass都实现的IDisposable

推荐答案

是的，你的code是正确的。以下是你可能想知道......一对夫妇的其他事情

Yes, your code is correct. Here's a couple other things you might want to be aware of...

您可以声明相同类型单一using语句的多个对象。从文档：

You can declare multiple objects of the same type in a single using statement. From the documentation:

using (Font font3 = new Font("Arial", 10.0f), 
            font4 = new Font("Arial", 10.0f))
{
    // Use font3 and font4.
}

有关使用多个不同类型的对象，你可以使用单行语法来节省空间巢：

For using multiple objects of different types you can nest using the one-line syntax to save space:

using (MyClass obj = new MyClass())
using (MyOtherClass objOC= new MyOtherClass())
using (TextReader objTR = new StringReader(...))
{
    // code using all three objects 
}   

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