如何在 C# 中从 XDocument 创建缩进的 XML 字符串？

Question

我有一个 XDocument 对象，ToString() 方法返回没有任何缩进的 XML。如何从中创建包含缩进 XML 的字符串？

编辑：我问如何创建内存中的字符串而不是写入文件。

编辑：看起来我不小心在这里问了一个技巧问题...ToString() 确实返回缩进的 XML。

Answer 1

XDocument doc = XDocument.Parse(xmlString);
string indented = doc.ToString();

Answer 2

从这里

XmlDocument doc = new XmlDocument();
doc.LoadXml("<item><name>wrench</name></item>");

// Save the document to a file and auto-indent the output.
XmlTextWriter writer = new XmlTextWriter("data.xml",null);
writer.Formatting = Formatting.Indented;
doc.Save(writer);

Answer 3

同一个汤又多了一种味道...;-)

StringWriter sw = new StringWriter();
XmlTextWriter xw = new XmlTextWriter(sw);
xw.Formatting = Formatting.Indented;
doc.WriteTo(xw);
Console.WriteLine(sw.ToString());

编辑：感谢约翰·桑德斯。这是一个应该更好地符合 MSDN 上的 Creating XML Writers 的版本。

using System;
using System.Text;
using System.Xml;
using System.Xml.Linq;

class Program
{
    static void Main(string[] args)
    {
        XDocument doc = new XDocument(
        new XComment("This is a comment"),
        new XElement("Root",
            new XElement("Child1", "data1"),
            new XElement("Child2", "data2")
            )
            );

        var builder = new StringBuilder();
        var settings = new XmlWriterSettings()
        {
            Indent = true
        };
        using (var writer = XmlWriter.Create(builder, settings))
        {
            doc.WriteTo(writer);
        }
        Console.WriteLine(builder.ToString());
    }
}

Answer 4

要使用 XDocument（而不是 XmlDocument）创建字符串，您可以使用：

XDocument doc = new XDocument(
    new XComment("This is a comment"),
    new XElement("Root",
        new XElement("Child1", "data1"),
        new XElement("Child2", "data2")
    )
);

XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
StringBuilder sb = new StringBuilder();
using (XmlWriter writer = XmlTextWriter.Create(sb, settings)) {
    doc.WriteTo(writer);
    writer.Flush();
}
string outputXml = sb.ToString();