"一个对象引用是所必需的非静态字段，方法或特性" [英] "An object reference is required for the non-static field, method, or property"

问题描述

我坚持我的代码这个小问题。

i am stuck with this small problem in my code.

我试图让这将写入XML文档小型控制台应用程序。
我已经使用XmlDocument的和的XMLNode概念

I am trying to make small console application which will write into xml document. I have used xmldocument and xmlnode concept.

错误我得到的;

*一个对象引用是必需的非静态字段，方法或属性Write_xml.Program.give_node（System.Xml.XmlDocument）'C：\Documents和Settings\Administrator\Desktop\Write_xml\Write_xml\ Program.cs的*

*An object reference is required for the non-static field, method, or property 'Write_xml.Program.give_node(System.Xml.XmlDocument)' C:\Documents and Settings\Administrator\Desktop\Write_xml\Write_xml\Program.cs*

代码是好的，除1错误。我不是能够解决它，我希望有人来检查并纠正它。

code is okay except 1 error. I am not able to resolve it ,i want somebody to check it and correct it.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;

namespace Write_xml
{
    class Program
    {


        static void Main(string[] args)
        {
            XmlDocument doc = new XmlDocument();
            XmlDocument lets = new XmlDocument();
            string path = @"D:\XMLFile.xml";

            doc.Load(path);


            XmlNode Rootnode = doc.SelectSingleNode("Number");

            XmlNode TakenOde = give_node(doc);
            Rootnode.AppendChild(TakenOde);
            doc.Save(path);


        }


        public XmlNode give_node(XmlDocument lets)
        {
              // On this xmldoc we will perform XMLNODE operations
              // for creat new nods and append child nodes
              //XmlNode RootNode = xmldoc.CreateElement("Root");

              XmlNode PersonsNode = lets.CreateElement("Person");


              XmlNode NameNode = lets.CreateElement("Name");
              PersonsNode.AppendChild(NameNode);
              NameNode.InnerText = "1st";


              XmlNode AgeNode = lets.CreateElement("Age");
              PersonsNode.AppendChild(AgeNode);
              AgeNode.InnerText = "2nd";


              XmlNode CityNode = lets.CreateElement("City");
              PersonsNode.AppendChild(CityNode);
              CityNode.InnerText = "3rd";

              return PersonsNode;

          }

    }

}

请让我我在做什么小错误。

please let me what small mistake i am doing.

推荐答案

您正试图调用的实例的方法，但没有指定一个实例。

You're trying to call an instance method, but without specifying an instance.

这样做的最简单的解决方法是让 give_node 方法静态。

The simplest fix for this is to make the give_node method static.

我没有看过的代码剩下的就看它是否是可以接受的，不是，虽然 give_node 应该叫 GiveNode 遵循.NET的命名规则。

I haven't looked at the rest of the code to see whether it's okay or not, although give_node should be called GiveNode to follow .NET naming conventions.

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