Question

我这样做：

var doc = new XPathDocument(Application.StartupPath + "/InfoR.xml");
var navigator = doc.CreateNavigator();

var Name = navigator.SelectSingleNode("//appsettings/name");

var user = navigator.SelectSingleNode("//appsettings/user");
var PPs = navigator.SelectSingleNode("//appsettings/PPs");
var aze = navigator.SelectSingleNode("//appsettings/aze");

我试图在公共部分课上阅读这些内容。所以我可以从我的应用程序的任何地方访问Name，用户等。（Form1.cs的）但正如我所看到的，不能在那里制作var ...不像int，string，float，....

Answer 1

这不可能像你这样做。 var用于方法的本地变量，而不是类。您需要在类级别声明这些变量：

private XPathNavigator Name;
private XPathNavigator user;
private XPathNavigator PPs;
private XPathNavigator aze;

然后用这个方法：

this.Name = navigator.SelectSingleNode("//appsettings/name");

this.user = navigator.SelectSingleNode("//appsettings/user");
this.PPs = navigator.SelectSingleNode("//appsettings/PPs");
this.aze = navigator.SelectSingleNode("//appsettings/aze");

然后该类中的其他方法或其他地方的部分朋友可以访问它。

Answer 2

如果要在方法中声明这些变量，则只能在该方法中访问它们。如果要在表单中的其他方法中使用它们，则需要将它们声明为成员变量。类似的东西：

public partial class Form1 : Form
{
    XPathNavigator Name;
    XPathNavigator user;
    XPathNavigator PPS;
    XPathNavigator aze;

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        var doc = new XPathDocument(Application.StartupPath + "/InfoR.xml");
        var navigator = doc.CreateNavigator();

        Name = navigator.SelectSingleNode("//appsettings/name");

        user = navigator.SelectSingleNode("//appsettings/user");
        PPs = navigator.SelectSingleNode("//appsettings/PPs");
        aze = navigator.SelectSingleNode("//appsettings/aze");
    }
}

Answer 3

正如我正确理解你的问题，你很可能正在寻找这样的东西（例如如何检索节点并将其存储到属性中）：

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    public string Name { get; set; }

    private void button1_Click(object sender, EventArgs e)
    {
        XPathDocument document = new XPathDocument(Application.StartupPath + "/InfoR.xml");
        XPathNavigator navigator = document.CreateNavigator();
        XPathNavigator node = navigator.SelectSingleNode("//appsettings/name");
        Name = node.InnerXml;
    }
}

公共部分班级VAR

3 个答案: