从 xml 文件读取

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 class，其属性与上述 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
}

我曾尝试使用 XDocument 将 xml 文件中的某些值读取到我的 LogOnUser class 的实例中，但是在浏览了 MSDN 上的文档后我变得有点卡住了没有找到我要找的东西我想在这里提问可能会更快更容易。

基本上，首先我只是尝试将 XML 中的 UserName 字段读入 LogOnUser 对象的 UserName 属性 .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，您可以按照以下步骤操作：

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 树向下任意深度，然后使用 Attribute() 访问 XML 属性。

然后权限信息可以得到如下，例如：

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

Answer 2

您可以进行 XPath 搜索。您可以获得所有用户信息。

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

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