C#。帮助表单XML

编辑： 好了，终于开始工作了。如果有人需要，这是我的代码

  public void Save(string savePath, string[] folderPath, string date, string time)
    {

        //path for xml
        //TODO: use "+savePath+" 
        string fileName = date+"_session.xml";

        if (File.Exists(fileName) == false)
        {
            //ID
            int sessionId = 1;


            //creating
            XDocument doc = new XDocument(
                new XElement("sessions",
                    new XElement("session",
                        new XAttribute("id", sessionId++),
                        new XAttribute("amount", folderPath.Length),
                        new XAttribute("date", date),
                        new XAttribute("time", time))));


            XElement folders = doc.Descendants("session").FirstOrDefault();
            for (int i = 0; i < folderPath.Length; i++)
            {


                folders.Add(new[] { new XElement("folderPath", folderPath[i]) });

            }


            //saving document
            doc.Save(fileName);

        } else
        {
            XDocument doc = XDocument.Load(fileName);
            int maxId = doc.Root.Elements("session").Max(t => Int32.Parse(t.Attribute("id").Value));
            XElement data = new XElement("session",
                new XAttribute("id", ++maxId),
                new XAttribute("amount", folderPath.Length),
                new XAttribute("date", date),
                new XAttribute("time", time));

            for (int i = 0; i < folderPath.Length; i++)
            {
                data.Add(new[] { new XElement("folderPath", folderPath[i]) });
            }
            doc.Root.Add(data);
            doc.Save(fileName);


        }




    }

我创建了一个程序，可以将当前打开的文件夹保存到.txt文件中， 我正试图以以下方式形成一个XML

19.07.2016
22:05
C:\\users\test
C:\\program data\\test2
C:\\users\\aleksei\\desktop
19.07.2016
23:15
C:\\users\test6
C:\\users\\aleksei\\pictures

这就是我喜欢创建新xml文档的方式

            string header = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
               "<!--This file is generated by the program.-->" +
               "<Folders></Folders>";
            XDocument doc = XDocument.Parse(header);
            XElement folders = doc.Descendants("Folders").FirstOrDefault();
            folders.Add( new[] {
               new XElement("Amount", amount),
               new XElement("Date", date),
               new XElement("Time", time),
               new XElement("folderPath", folderPath)
            });

string header=“”+
"" +
"";
XDocument doc=XDocument.Parse（标题）；
XElement folders=doc.substands（“folders”）.FirstOrDefault（）；
文件夹。添加（新[]{
新XElement（“金额”，金额），
新XElement（“日期”，日期），
新元素（“时间”，时间），
新XElement（“folderPath”，folderPath）
});

我通常使用下面的方法使用LINQ创建XML文档

 public static void Save(string savePath, string folderPath, string date, string time, string amount)
        {
            string count =" 3";
//I am explicitly initializing the id count but you need to query and sort in descedning order take the first id and increment accordingly
            XDocument xDocument = XDocument.Load(savePath);
            if (xDocument != null)
            {

                //To add the xml document at specific location
                xDocument.Element("Folders").Elements("Save")
                    .Where(x => x.Attribute("Id").Value == count)
                    .FirstOrDefault()
                    .AddAfterSelf(
                    new XElement("Save", new XAttribute("Id", count+1),
                new XElement("Amount", new XAttribute("amount", "3"),
                new XElement("Date", date),
                new XElement("Time", time),
                new XElement("folder", folderPath)))
                    );
                FileStream fs = new FileStream(savePath,
                               FileMode.Create, FileAccess.ReadWrite, FileShare.Read);

                xDocument.Save(fs);

            }

            else
            {
                //If folder is open and xml file doesnt exist
                XDocument newDocument = new XDocument(
              new XDeclaration("1.0", "utf-8", "yes"),
               new XComment("This file is generated by the program."),
                //Root single Element              
                new XElement("Folders",

                //child Elements
                new XElement("Save", new XAttribute("Id", "1"),
                new XElement("Amount", new XAttribute("amount", "3"),
                new XElement("Date", date),
                new XElement("Time", time),
                new XElement("folder", folderPath)))
                ));

                FileStream fs = new FileStream(savePath,
                               FileMode.Create, FileAccess.ReadWrite, FileShare.Read);

                     newDocument.Save(fs);

            }

---

在这里，您需要查询现有xml文档的ID属性，并按降序排列，然后如果有打开的文件夹，请在此ID之后添加新节点。

当前代码有什么问题？什么不起作用？当前没有任何东西起作用，这里给我一个错误：XDocument XDocument=XDocument.Load（date+“_saves.xml”）；这样说：System.Xml.dllI中发生了一个未处理的“System.Xml.XmlException”类型的异常，我甚至不知道我所做的是否正确。也许使用LINQ更好？您需要向Load方法传递有效路径。据我所知，

date

不是一个文件路径…文件名应该是19.07.2016\u save.xml。我不断收到错误消息，表示附加信息：访问路径“C:\Users\Public”被拒绝。或我选择的任何路径。以管理员身份运行Visula studio或授予文件夹的完全权限

 public static void Save(string savePath, string folderPath, string date, string time, string amount)
        {
            string count =" 3";
//I am explicitly initializing the id count but you need to query and sort in descedning order take the first id and increment accordingly
            XDocument xDocument = XDocument.Load(savePath);
            if (xDocument != null)
            {

                //To add the xml document at specific location
                xDocument.Element("Folders").Elements("Save")
                    .Where(x => x.Attribute("Id").Value == count)
                    .FirstOrDefault()
                    .AddAfterSelf(
                    new XElement("Save", new XAttribute("Id", count+1),
                new XElement("Amount", new XAttribute("amount", "3"),
                new XElement("Date", date),
                new XElement("Time", time),
                new XElement("folder", folderPath)))
                    );
                FileStream fs = new FileStream(savePath,
                               FileMode.Create, FileAccess.ReadWrite, FileShare.Read);

                xDocument.Save(fs);

            }

            else
            {
                //If folder is open and xml file doesnt exist
                XDocument newDocument = new XDocument(
              new XDeclaration("1.0", "utf-8", "yes"),
               new XComment("This file is generated by the program."),
                //Root single Element              
                new XElement("Folders",

                //child Elements
                new XElement("Save", new XAttribute("Id", "1"),
                new XElement("Amount", new XAttribute("amount", "3"),
                new XElement("Date", date),
                new XElement("Time", time),
                new XElement("folder", folderPath)))
                ));

                FileStream fs = new FileStream(savePath,
                               FileMode.Create, FileAccess.ReadWrite, FileShare.Read);

                     newDocument.Save(fs);

            }