小编VKR*_*VKR的帖子

我发现很难在打字稿中声明数组并访问它.

下面是为我工作的代码

class Book {
    public BookId: number;
    public Title: string;
    public Author: string;
    public Price: number;
    public Description: string;
}

class dataservice {
    getproducts() {
        var bk = new Book();
        bk.Author = "vamsee";
        bk.BookId = 1;
        var bks: Book[] = [bk,bk];

        return bks.length;
    }
}

var ds = new dataservice();
var button = document.createElement('button');

button.onclick = function () {     
    alert(ds.getproducts().toString());
}

document.body.appendChild(button);

当我更改我的代码时,它尝试为数组项分配值时失败.

var bks: Book[] = new Book[2];
bks[0].Author = "vamsee";
bks[0].BookId = 1;
return bks.length;

对于我在循环中添加对象,我必须以第二种方式进行.