从 xml 文件中读取

Question

我有一个这样的 xml 文件：

<?xml version="1.0" encoding="utf-8" ?>
<LogOnUsersInfo>
  <GeneralInformation>
    <NumberOfUsers>2</NumberOfUsers>
    <LastUser UserName="User1"/>
  </GeneralInformation>
  <LogOnUserCollection>
    <LogOnUser UserName="User1" Password="password">
      <Rights>
        <CanCreateProducts value="true"/>
        <CanEditProducts value="true"/>
        <CanDeleteProducts value="true"/>
        <CanCreateLogIns value="true"/>
        <CanDeleteLogIns value="true"/>
        <CanBeDeleted value="true"/>
        <HasDebugRights value="false"/>
      </Rights>
    </LogOnUser>  
    <LogOnUser UserName="User2" Password="password">
      <Rights>
        <CanCreateProducts value="true"/>
        <CanEditProducts value="true"/>
        <CanDeleteProducts value="true"/>
        <CanCreateLogIns value="true"/>
        <CanDeleteLogIns value="true"/>
        <CanBeDeleted value="true"/>
        <HasDebugRights value="false"/>
      </Rights>
    </LogOnUser>
  </LogOnUserCollection>
</LogOnUsersInfo>

我有一个类，其属性与所述 xml 文件中的值相匹配：

public class LogOnUser
{
    #region NestedTypes
    public class Rights
    {
        public bool CanCreateProducts { get; set; }
        public bool CanEditProducts { get; set; }
        public bool CanDeleteProducts { get; set; }
        public bool CanCreateLogIns { get; set; }
        public bool CanDeleteLogIns { get; set; }

        public bool CanBeDeleted { get; set; }
        public bool HasDebugRights { get; set; }
    };
    #endregion

    #region Members
    string _UserName;
    string _Password;
    bool _LoggedIn;
    Rights _UserRights;

    #endregion

    #region Construction
    public LogOnUser() { }

    public LogOnUser(string username)
    {
        _UserName = username;
    }

    public LogOnUser(string username, string password, bool cancreateproducts, bool caneditproducts, bool candeleteproducts, bool cancreatelogins, bool candeletelogins)
    {
        _UserName = username;
        _Password = password;

        _UserRights = new Rights();

        _UserRights.CanCreateProducts = cancreateproducts;
        _UserRights.CanEditProducts = caneditproducts;
        _UserRights.CanDeleteProducts = candeleteproducts;
        _UserRights.CanCreateLogIns = cancreatelogins;
        _UserRights.CanDeleteLogIns = candeletelogins;
    }
    #endregion

    #region Properties
    public string Username
    {
        get { return _UserName; }
        set { _UserName = value; }
    }

    public string Password
    {
        get { return _Password; }
        set { _Password = value; }
    }

    public bool LoggedIn
    {
        get { return _LoggedIn; }
        set { _LoggedIn = value; }
    }

    public Rights UserRights
    {
        get { return _UserRights; }
        set { _UserRights = value; }
    }
    #endregion
}

我尝试使用 XDocument 将 xml 文件中的某些值读取到我的 LogOnUser 类的实例中，但是在浏览 MSDN 上的文档并没有找到我正在寻找的内容之后，我变得有点卡住了认为在这里提出问题可能会更快更容易。

基本上，我刚开始尝试将 XML 中的 UserName 字段读取到 LogOnUser 对象的 UserName 属性中。我试过这个：

var XMLUser = XElement.Load(LogOnUserXMLFilePath);

foreach(XElement e in XMLUser.DescendantsAndSelf())
{
    var user = new Model.LogOnUsers.LogOnUser(e.Name.ToString());
}

但是，这会将UserName 设置为“LogOnUsersInfo”，所以显然我需要更深入地了解 xml，但我不知道如何。

谁能指出我正确的方向？

Answer 1

作为初学者，您可以执行以下操作：

foreach(XElement e in XMLUser.Descendants("LogOnUser"))
{
    var user = new Model.LogOnUsers.LogOnUser((string)e.Attribute("UserName"));
}

基本上，您可以使用Descendants() 沿着XML 树向下任意层深入，并使用Attribute() 访问XML 属性。

那么权利信息可以如下获取，例如：

var cancreateproducts = (bool)e.Element("Rights")
                               .Element("CanCreateProducts")
                               .Attribute("value");

Answer 2

您可以进行 XPath 搜索。您可以获取所有用户信息。

var nodes = doc.SelectNodes("//LogOnUser");
foreach(var node in nodes)
{
    var username = node.Attributes["Username"];
}