从IEnumerable中的任何点访问一系列元素 [英] Accessing a range of elements from any point in an IEnumerable

问题描述

我有这种方法:

private IEnumerable<XElement> ReadTransactions(string file_name)
    {
        using (var reader = XmlReader.Create(file_name + ".xml"))
        {
            while (reader.ReadToFollowing("transaction", "urn:namepsaceUri"))
            {
                using (var subtree = reader.ReadSubtree())
                {
                    yield return XElement.Load(subtree);
                }
            }
        }
    }

此方法从XML文件读取.但是，我不需要同时使用XML文件中的所有节点.

This method reads from an XML file. However, I don't need all of the nodes in the XML file at same time.

我想一次让他们十个.

我尝试使用XPathSelectElements，但这会获取所有节点，然后需要遍历它们.

I tried working with XPathSelectElements, but that gets all the nodes, and then I need to iterate through them.

那么，有没有一种方法可以从XML文件中获取40-50个节点?我想修改ReadTransactions-具有另一个输入参数(在这种情况下为40)，而不是所有元素，它将仅返回10?

So, is there a way to get the nodes from the XML file which are 40-50? I want to modify ReadTransactions - to have another input parameter (40 in this case), and instead of all the elements, it will return just 10?

推荐答案

Skip()和 Take()扩展方法?

var items = ReadTransactions(file_name).Skip(40).Take(10);

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