c# - 构建后将 XDeclaration 添加到 XDocument

Question

我有一个 XmlSerializer，用于将对象序列化为 XDocument。

var doc = new XDocument();
using (var writer = doc.CreateWriter())
{
   xmlSerializer.Serialize(writer, object);
}

完成后，我想添加一个 XDeclaration:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

我按如下所述构造此 XDeclaration:

var decl = new XDeclaration("1.0", "UTF-8", "no");

但是，当我尝试将此 XDeclartion 添加到我的 XDocument 时，出现以下错误:

System.ArgumentException : Non white space characters cannot be added to content.

我在 Google 上搜索了一段时间，但我发现的只是将 XDeclaration 添加到 XDocument 的构造函数中，这在我的情况下(当用 XmlWriter 填充时)是 Not Acceptable 。

Answer 1

使用属性 XDocument.Declaration

---

编辑:

示例代码:

var xmlSerializer = new XmlSerializer(typeof(int));

var doc = new XDocument();

var decl = new XDeclaration("1.0", "utf-8", "no");
doc.Declaration = decl;

using (var writer = doc.CreateWriter())
{
    xmlSerializer.Serialize(writer, 1);
}
doc.Save(File.Create("x.xml"));

此代码产生以下输出:

<?xml version="1.0" encoding="utf-8" standalone="no"?>
<int>1</int>