如何将对象数组添加到arraylist [英] How to add object array to the arraylist

问题描述

大家好



我想在我的项目中将对象[]添加到数组列表中，如下所示：



object [] obj = {111，Sara，200，300}



并定义：



arrayList arr = new arrayList（200）;

this.arr.Insert（k，obj）;

k ++;



我尝试过的事情：



我用过this.arr.add（）但不起作用

Hi All

I wanna Add object[] to array list in my Project as Follow :

object[] obj= {"111","Sara","200","300"}

and define :

arrayList arr = new arrayList(200);
this.arr.Insert(k,obj);
k++;

What I have tried:

I used this.arr.add() but does not work

推荐答案

这里有两个直接问题，一个是间接问题。

1） ArrayList 与 arrayList 不同 - C＃区分大小写。

2）您将arr声明为局部变量 - 表示它的范围是声明它的方法。你不能通过类实例访问它，这是这个的用途。

There are two direct problems here, and one indirect.
1) ArrayList is not the same as arrayList - C# is case sensitive.
2) You declare arr as a local variable - which means it is scoped to the method in which it is declared. You cannot access it via the class instance, which is what this is there for.

ArrayList arr = new ArrayList(200);
arr.Add(obj);

间接问题是ArrayList在C＃的V2中被取代，waaaay回来了2005年由Generic Collections提供，因为它们是类型安全的，它们要好得多。不应在新项目中使用ArrayList。

The indirect problem is that ArrayList was superseded in V2 of C#, waaaay back in 2005 by Generic Collections, which are a lot better as they are typesafe. ArrayList should not be used in new projects.

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