c# - 如何将此 StringBuilder-to-XML 代码更改为 LINQ-to-XML？

Question

在我的应用程序中，我使用 StringBuilder 使用此代码构建了一个 XML 文件:

StringBuilder sb = new StringBuilder();
sb.Append("<?xml version=\"1.0\" encoding=\"utf-8\"?>" + Environment.NewLine);

sb.Append(String.Format("<{0}>{1}", _pluralCamelNotation, Environment.NewLine));
for (int index = 0; index < 3; index++)
{
    sb.Append(String.Format("\t<{0}>{1}", _singularCamelNotation, Environment.NewLine));
    foreach (DataType dataType in _allDataTypes)
    {
        sb.Append(String.Format("\t\t<{0}>{2}</{0}>{1}", dataType.CamelCaseNotation, Environment.NewLine, dataType.GetDummyData()));
    }
    sb.Append(String.Format("\t</{0}>{1}", _singularCamelNotation, Environment.NewLine));
}
sb.Append(String.Format("</{0}>{1}", _pluralCamelNotation, Environment.NewLine));

return sb.ToString();

我怎样才能用 LINQ 做同样的事情，像这样:

PSEUDO-CODE:

var xdoc = new XDocument(
    new XDeclaration("1.0", "utf-8", null),
    for (int index = 0; index < 3; index++) {
        new XElement(_pluralCamelNotation,
            _allDataTypes.Select(datatype => new XElement(_singularCamelNotation,
                new XElement(datatype.CamelCaseNotation, datatype.GetDummyData())
            ))
        )
    }
);

Answer 1

即使没有 LINQ，您也不应该通过串联编写 xml...XmlWriter 将是一个不错的选择:

    XmlWriterSettings settings = new XmlWriterSettings();
    settings.NewLineHandling = NewLineHandling.Entitize;
    settings.Indent = true;
    settings.IndentChars = "\t";

    StringBuilder sb = new StringBuilder();
    using (XmlWriter xw = XmlWriter.Create(sb, settings))
    {
        xw.WriteStartDocument();
        xw.WriteStartElement(_pluralCamelNotation);
        for (int i = 0; i < 3; i++)
        {
            xw.WriteStartElement(_singularCamelNotation);
            foreach (DataType dataType in _allDataTypes)
            {
                xw.WriteElementString(dataType.ToString(),
                    dataType.GetDummyData());
            }
            xw.WriteEndElement();
        }
        xw.WriteEndElement();
        xw.WriteEndDocument();
        xw.Close();
    }

您可以使用 XmlWriterSettings 来控制行距等内容。

或者，使用 LINQ-to-XML:

    XDocument doc = new XDocument(
        new XDeclaration("1.0", null, null),
        new XElement(_pluralCamelNotation, 
            Enumerable.Range(1,3).Select(
                i => new XElement(_singularCamelNotation,
                    _allDataTypes.Select(
                        dataType => new XElement(
                            dataType.ToString(),
                            dataType.GetDummyData())
                    )
            ))));

    string t = doc.ToString();