如何将XElement添加到文档中，以避免出现“结构不正确的文档"错误? [英] How do I add an XElement to a document, avoiding the "incorrectly structured document" error?

问题描述

        // Remove element with ID of 1
        var userIds = from user in document.Descendants("Id")
                       where user.Value == "1"
                       select user;

        userIds.Remove();

        SaveAndDisplay(document);

        // Add element back
        var newElement = new XElement("Id", "0", 
            new XElement("Balance", "3000"));
        document.Add(newElement);

        SaveAndDisplay(document);

添加元素back块是问题所在.谈到添加时，状态如下:

The add element back block is the problem. As when it gets to the add it states:

此操作将创建一个 结构不正确的文档.

This operation would create an incorrectly structured document.

我犯了什么愚蠢的错误?

What stupid mistake am I making?

是的，我正在读为XDocument，而不是XElement.关于何时偏爱另一方的任何建议?

Yes, I was reading as an XDocument, not XElement. Any advice on when to favour one or the other?

推荐答案

您似乎正在尝试添加一个新元素作为文档根目录的子元素.如果是这样，则需要将Add语句更改为以下内容.

It looks like you are trying to add a new element as a child of your document's root. If so, then you need to change your Add statement to the following.

var newElement = new XElement("Id", "0", new XElement("Balanace", "3000"));
document.Root.Add(newElement);

直接添加到文档中会添加另一个根元素，这违反了XML结构.

Adding directly to the document adds another root element, which violates the XML structure.

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