如何通过索引访问IReadOnlyCollection的元素? [英] How can I access a element of a IReadOnlyCollection through it index?

问题描述

我正在使用硒，并且正在使用功能FindElements，所以我得到一个实现IReadOnlyCollection接口的元素.我想遍历列表，但似乎IReadOnlyCollection没有诸如Get(int index)或操作[]的实现之类的任何方法.

I am working with selenium and I am using the function FindElements so I am getting a element that implements IReadOnlyCollection interface. I want to iterate through the list but it seems that IReadOnlyCollection doesnt have any method like Get(int index) or a implementation of the operation [].

我想避免将结果转换为列表或数组，因为我只想访问元素以读取它们.

I want to avoid transforming the result to a List or to an array since I just want to access the elements to read them.

当前我不想使用foreach，因为我需要管理索引，以便可以将这些元素添加到另一个数组中.

Currently I don't want to use a foreach since I need to manage an index so I can add those elements to an another array.

这就是我想要做的:

public void fillMatrix(){
    IReadOnlyCollection<IWebElement> rows = Driver.FindElements(By.XPath("./*/tr"));            
        IReadOnlyCollection<IWebElement> elements;
        matrix = new IControl[rows.Count()][];
        for(int i = 0; i < matrix.Count(); ++i){
            matrix[i] = rows[i].FinElements("./td").toArray();                
        }    
}

谢谢

推荐答案

使用ElementAt(int)函数和索引值.

Use the ElementAt(int) function with the index value.

这是到ElementAt(int)函数的MSDN链接 https://msdn.microsoft.com/zh-CN/library/bb299233(v=vs.110).aspx

Here is the MSDN link to the ElementAt(int) function https://msdn.microsoft.com/en-us/library/bb299233(v=vs.110).aspx

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