XML格式生成问题

Question

我正在尝试使用XML生成一个XDocument文档：

   public class BuildXML
        {
           static void Main( string[ ] args ) {
              XDocument doc = new XDocument(
                new XElement("FolioIdentifiers",
                new XElement("FolioId", "6798634B2F7")),
                                         //);

                 new XElement("DocumentAuthentication",
                 new XElement("ScannedDocuments",
                 new XElement("ScannedDocument",
                 new XElement("DocumentType", "AppliationForm")))));

        doc.Save("C:\\document.xml");

运行它时，出现此错误：

This operation would create an incorrectly structured document.

我使用的格式错误吗？

Answer 1

XML文档只能有一个根节点。就您而言，您有两个：FolioIdentifiers和DocumentAuthentication。如果我调整您的格式，将更容易看到。

public class BuildXML
{
    static void Main( string[ ] args )
    {
        XDocument doc = new XDocument(
            //At root level
            new XElement("FolioIdentifiers",
                new XElement("FolioId", "6798634B2F7")),

            //Also at root level (BAD! - this is what causes the incorrect structure error)
            new XElement("DocumentAuthentication",
                new XElement("ScannedDocuments",
                    new XElement("ScannedDocument",
                        new XElement("DocumentType", "AppliationForm")))));

        doc.Save("C:\\document.xml");
    }  
}

Answer 2

通过将“ FolioIdentifiers”设为根元素，可以轻松解决该错误，从而使您在根目录下没有数组。只需移动括号即可解决：

             XDocument doc = new XDocument(
                new XElement("FolioIdentifiers", new object[] {
                new XElement("FolioId", "6798634B2F7"),
                 new XElement("DocumentAuthentication",
                 new XElement("ScannedDocuments",
                 new XElement("ScannedDocument",
                 new XElement("DocumentType", "AppliationForm"))))}));