C# 如何使用 foreach 和 LINQ 构建 XDocument？
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How to build an XDocument with a foreach and LINQ?
提问by Edward Tanguay
I can use XDocument to build the following file which works fine:
我可以使用 XDocument 来构建以下工作正常的文件：
XDocument xdoc = new XDocument
(
new XDeclaration("1.0", "utf-8", null),
new XElement(_pluralCamelNotation,
new XElement(_singularCamelNotation,
new XElement("id", "1"),
new XElement("whenCreated", "2008-12-31")
),
new XElement(_singularCamelNotation,
new XElement("id", "2"),
new XElement("whenCreated", "2008-12-31")
)
)
);
However, I need to build the XML file by iterating through a collectionlike this:
但是，我需要通过遍历这样的集合来构建 XML 文件：
XDocument xdoc = new XDocument
(
new XDeclaration("1.0", "utf-8", null));
foreach (DataType dataType in _dataTypes)
{
XElement xelement = new XElement(_pluralCamelNotation,
new XElement(_singularCamelNotation,
new XElement("id", "1"),
new XElement("whenCreated", "2008-12-31")
));
xdoc.AddInterally(xelement); //PSEUDO-CODE
}
There is Add, AddFirst, AddAfterSelf, AddBeforeSelf, but I could get none of them to work in this context.
有Add、AddFirst、AddAfterSelf、AddBeforeSelf，但我无法让它们在这种情况下工作。
Is an iteration with LINQ like this possible?
像这样的 LINQ 迭代可能吗？
Answer:
回答：
I took Jimmy's code suggestion with the root tag, changed it up a bit and it was exactly what I was looking for:
我采用了带有根标记的 Jimmy 的代码建议，对其进行了一些更改，这正是我想要的：
var xdoc = new XDocument(
new XDeclaration("1.0", "utf-8", null),
new XElement(_pluralCamelNotation,
_dataTypes.Select(datatype => new XElement(_singularCamelNotation,
new XElement("id", "1"),
new XElement("whenCreated", "2008-12-31")
))
)
);
Marc Gravell posted a better answer to this on this StackOverflow question.
Marc Gravell在这个 StackOverflow 问题上发布了一个更好的答案。
采纳答案by Jimmy
You need a root element.
你需要一个根元素。
var xdoc = new XDocument(
new XDeclaration("1.0", "utf-8", null),
new XElement("Root",
_dataTypes.Select(datatype => new XElement(datatype._pluralCamelNotation,
new XElement(datatype._singlarCamelNotation),
new XElement("id", "1"),
new XElement("whenCreated", "2008-12-31")
))
)
);
回答by BFree
What's wrong with the simple Add method?
简单的Add 方法有什么问题？
回答by Dustin Campbell
If I'm not mistaken, you should be able to use XDocument.Add():
如果我没记错的话，您应该可以使用 XDocument.Add()：
XDocument xdoc = new XDocument
(
new XDeclaration("1.0", "utf-8", null));
foreach (DataType dataType in _dataTypes)
{
XElement xelement = new XElement(_pluralCamelNotation,
new XElement(_singularCamelNotation,
new XElement("id", "1"),
new XElement("whenCreated", "2008-12-31")
));
xdoc.Add(xelement);
}
回答by Kiks
I know it's very very old post but I stumbled across this today trying to solve the same problem. You have to add the element to the Root of the document:
我知道这是非常非常古老的帖子，但我今天偶然发现了这个试图解决同样的问题。您必须将元素添加到文档的根：
xdoc.Root.Add(xelement);
