Question

我正在将一些XML导入C＃，并希望能够以我认为是嵌套结构的形式从XML访问数据。（我可能错了！）

我在XML中的内容如下：

<hardwareSettings initial="true>
    <cameraSettings width="1024" height="768" depth="8" />
    <tiltSettings theta="35" rho="90">
</hardwareSettings>

我可以导入每个设置，所以我将它们全部用于单独的整数，但我希望能够以表格形式访问它

int x=hardwaresettings.camerasettings.width;
int rho=hardwaresettings.tiltsettings.rho;

我已尝试在结构体内进行各种结构排列，但我似乎无法投射包含相应子项的新对象（hardwaresettings）（camerasettings.width＆amp; tiltsettings.rho）。

对不起，如果我没有使用正确的术语......我在这里读圈子了！

Answer 1

public class TiltSettings
{
    public TiltSettings(XElement element)
    {
        this.Theta = Convert.ToInt32(element.Attribute("theta").Value);
        this.Rho = Convert.ToInt32(element.Attribute("rho").Value);
    }
    public int Theta {get; set;}
    public int Rho { get; set; }
}
public class CameraSettings
{
    public CameraSettings(XElement element)
    {
        this.Height = Convert.ToInt32(element.Attribute("height").Value);
        this.Width = Convert.ToInt32(element.Attribute("width").Value);
        this.Depth = Convert.ToInt32(element.Attribute("depth").Value);
    }
    public int Width {get; set;}
    public int Height {get; set;}
    public int Depth { get; set; }
}
public class HardwareSettings
{
    public HardwareSettings(string xml)
    {
        var xDoc = XDocument.Parse(xml);
        this.IsInitial = xDoc.Root.Attribute("initial").Value == "true";
        this.Camera = new CameraSettings(xDoc.Root.Element("cameraSettings"));
        this.Tilt = new TiltSettings(xDoc.Root.Element("tiltSettings"));
    }
    public CameraSettings Camera {get; set;}
    public TiltSettings Tilt {get; set;}
    public bool IsInitial {get; set;}
}

Answer 2

您可以通过在XDocument类上编写自定义包装器来实现此类功能。

Answer 3

如果我的问题正确的话，可能类似的东西会起作用。

class HardwareSettings
{
    public TiltSettings TiltSettings { get; set; }
    public CameraSetting CameraSetting { get; set; }
}

    struct CameraSetting
    {
        public int Width { get; set; }    
        public int Height { get; set; }
        public int Depth { get; set; }
    }

    struct TiltSettings
    {
        public int Theta { get; set; }
        public int Rho { get; set; }
    }

修改

以"properties"
的身份访问课程HardwareSettings.CameraSetting.Depth
XElement elements = XElement.Load("XMLFile.xml"); List<HardwareSettings> hardwareSettingsList = (from e in elements.Descendants("cameraSettings") select new HardwareSettings { CameraSetting = new CameraSetting() { Depth = Convert.ToInt32(e.Attribute("width").Value), Height = Convert.ToInt32(e.Attribute("width").Value), Width = Convert.ToInt32(e.Attribute("width").Value) }, TiltSettings = new TiltSettings() { } // your logic for rest of the structs }).ToList<HardwareSettings>(); int depth = 0; foreach (HardwareSettings hardwareSetting in hardwareSettingsList) { depth = hardwareSetting.CameraSetting.Depth; }

Answer 4

考虑创建设置类并使用内置或自定义SettingsProvider。

您将创建该类并继承ApplicationSettingsBase

有很多关于此的文档，但这里是一个非常快速的snippit。

设置类

internal sealed partial class TestSettings : ApplicationSettingsBase
{

    private static TestSettings settings = ((TestSettings)(ApplicationSettingsBase.Synchronized(new TestSettings())));

    public static TestSettings Settings { get { return settings; } }

    [UserScopedSetting()]
    public CameraSettingsClass CameraSettings
    {
        get
        {
            try
            {
                if(this["CameraSettings"] == null) return (CameraSettingsClass)(new CameraSettingsClass());
                else return (CameraSettingsClass)this["CameraSettings"];
            }
            catch(Exception error) {throw new Exception("Problem with accessing CameraSettings");}
        }
        set { this["CameraSettings"] = value; }
    }
}
    public class CameraSettingsClass
    {
        [XmlAttribute]
        public int Width {get;set;}
        [XmlAttribute]
        public int Height {get;set;}
        [XmlAttribute]
        public int Depth {get;set;}
        public CameraSettingsClass()
        {
            this.Width = 1024;
            this.Height = 768;
            this.Depth = 8;
        }
    }

//Access of the settings as follows
TestSettings.Settings.CameraSettings
//or
TestSettings.Settings["CameraSettings"]

节点的XML输出

<TestProject.TestSettings>
    <setting name="CameraSettings" serializeAs="Xml">
        <value>
            <CameraSettingsClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                xmlns:xsd="http://www.w3.org/2001/XMLSchema" Width="512" Height="768"
                Depth="8" />
        </value>
    </setting>
</TestProject.TestSettings>

您可以在此处查看有关使用Different SettingsProviders的详细信息的更多信息 http://msdn.microsoft.com/en-us/library/ms171565(VS.80).aspx

使用设置提供程序和ApplicationSettingsBase将为您提供.Save（）。Reload（）。Upgrade（）等功能。

如何使用C＃嵌套结构访问数据树

4 个答案:

设置类

节点的XML输出