阅读/解析 Xml 文档时遇到问题

Question

我有一个与此类似（在此处编辑）的 Xml 文档：

    <?xml version="1.0" encoding="utf-8" ?>
    <configuration>
        <configSections>
            <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
                <section name="WebApptNotificationService.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
            </sectionGroup>
        </configSections>
        <connectionStrings>
            removed for questions
        </connectionStrings>
            <startup> 
                    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
            </startup>
        <system.net>
            <mailSettings>
                <smtp deliveryMethod="SpecifiedPickupDirectory">
                    <specifiedPickupDirectory pickupDirectoryLocation="C:\test\"/>      
                </smtp>
            </mailSettings>
         <mailSettings>
                <smtp from="xxxxx@xxxxxx.com">
                    <network host="mail.xxxxxxxx.com" enableSsl="true" password="xxxxxx" port="xxx" userName="xx@xxxxxxxx.com"/>
                </smtp>
                    <smtp from="No.Reply@xxxxxxxxxx.org">
                <network host="1stmsmail.xxxx.local" enableSsl="true" password="xxxxxxx" port="587" userName="ouruser"/>
            </smtp>
        </mailSettings>
        </system.net>
        <applicationSettings>
            <WebApptNotificationService.Properties.Settings>
                <setting name="ConfirmationInterval" serializeAs="String">
                    <value>60000</value>
                </setting>
                <setting name="EmailFromName" serializeAs="String">
                    <value>Test</value>
                </setting>
                <setting name="EmailFromAddress" serializeAs="String">
                    <value>mobile@xxxxx.com</value>
                </setting>
                <setting name="DaysBeforeReminder" serializeAs="String">
                    <value>2</value>
                </setting>
                <setting name="MinTextMinute" serializeAs="String">
                    <value>480</value>
                </setting>
                <setting name="MaxTextMinute" serializeAs="String">
                    <value>1200</value>
                </setting>

            </WebApptNotificationService.Properties.Settings>
        </applicationSettings>
    </configuration>

我正在尝试读取使用以下代码的值：

    private string parseXML(string name)
        {
            string returnVal = string.Empty;
            XmlDocument xmlDoc = xmlFile.SettingXML;
            //returnVal = xmlDoc.GetElementsByTagName(name).ToString();
            XmlNode node = xmlDoc.SelectSingleNode("//configuration//applicationSettings//WebApptNotificationService.Properties.Settings//setting");
            MessageBox.Show(node.ToString());
            //returnVal = xmlDoc.DocumentElement.Name.(x => x.Element("Author"));
            return returnVal;
        }

       Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
            Dim xdoc As XDocument = XDocument.Load(FILENAME)
            Dim versions As IEnumerable(Of XElement) = xdoc.Descendants("Version")
            For Each version As XElement In versions
                For Each trunk As XElement In version.Elements("Trunk")
                    Console.WriteLine(CType(trunk, String))
                    ComboBox1.Items.Add(CType(trunk, String))
                Next trunk

                For Each xEle As XElement In version.Elements("Branch")
                    Console.WriteLine(CType(xEle, String))
                    ComboBox2.Items.Add(CType(xEle, String))
                Next xEle
            Next version

        End Sub

现在 xmlFile.SettingXML 是一个从配置文件创建的类。它被存储为一个类。我想根据传入的名称从设置名称中获取值。看起来好像我失败得很惨。如果有人能指出我处理这个问题的正确方法，我将不胜感激。

编辑：正如所指出的那样悲惨地失败并不能描述这个问题。现在我在 Messagebox 中获取 System.Xml.XmlElement。

Answer 1

正如你所说的Right now I am getting System.Xml.XmlElement in the Messagebox 尝试使用MessageBox.Show(node.InnerText) 这将获得settings 元素（节点对象）的内部文本。如果您在消息框中显示您的 node 对象，它将调用对象的 ToString 方法，该对象是 System.Xml.XmlElement。

Whit XDocument 你可以轻松做到这一点：

    static void Main(string[] args)
    {
        string value = ParseXML("EmailFromAddress");
        Console.WriteLine(value);
    }

    private static string ParseXML(string name)
    {
        // Load Document use 'XDocument.Parse' if you want to load the document from string
        XDocument xmlDoc = XDocument.Load("C:\\t\\2.txt");

        // Select element setting where name attribute is equal to name
        var node = xmlDoc
            .Descendants("WebApptNotificationService.Properties.Settings")
            .Elements("setting")
            .FirstOrDefault(x => (string) x.Attribute("name") == name);

        return node.Value;
    }