[英]Reading from an xml file
我有一个像这样的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LogOnUser类的实例中,但是,我变得有点困惑,并且在MSDN上浏览了文档之后却找不到我想要的东西,我认为这可能更快,更容易在这里提出问题。
基本上,首先,我只是尝试将XML中的UserName
字段读取到LogOnUser
对象的UserName
属性中。 我尝试了这个:
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”,因此显然我需要更深入地研究xml,但是我不知道如何。
谁能指出我正确的方向?
首先,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()
将XML树深入任意层次,并使用Attribute()
来访问XML属性。
然后可以按以下方式获取权限信息,例如:
var cancreateproducts = (bool)e.Element("Rights")
.Element("CanCreateProducts")
.Attribute("value");
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"];
}
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