Question

我在容器上编写代码，该容器从文本文件接收输入并将其值分配给适当的变量。这里出现了错误访问非静态成员需要一个对象引用`GetContainerDetails.Containerdetails.cnum请解决此问题。

using System;
using System.IO;


namespace GetContainerDetails
{
    class Containerdetails
    {
        private string cnum;
        private double length;
        private double height;
        private double depth;
        private double volume;


    // Declare a number of box of type string:
    public string containernum
    {
        get { return cnum; }
        set { cnum = value; }
    }

    // Declare  properties of box of type double:
    public double conlength
    {
        get { return length; }
        set { length = value; }
    }
    public double conheight
    {
        get { return height; }
        set { height = value; }
    }
    public double condepth
    {
        get { return depth; }
        set { depth = value; }
    }
    public double convolume
    {
        get { return volume; }
        set { volume = value; }
    }

        static void Main(string[] args)
        {
            try
            {
                 using (StreamReader sr = new StreamReader("c:/containervalues.txt"))
                {
                    string line;

                    while ((line = sr.ReadLine()) != null)
                    {
                        string[] Parts = line.Split(' ');
                      cnum=Parts[0];  
                      length=Convert.ToDouble(Parts[1]);  
                      height=Convert.ToDouble(Parts[2]);  
                      depth=Convert.ToDouble(Parts[3]);  
                      volume = Convert.ToDouble(Parts[4]);


                    }
                }
            }
            catch (Exception ex) 
            {
                    // what failed?
            }
        }

       }
  }

Answer 1

方法static void Main无法访问非静态成员cnum, length, height, depth and volume

使方法非静态或使成员静态。

Answer 2

您的字段不是静态的。您正尝试从静态方法设置它们。要么将它们设置为静态，要么创建Containerdetails的实例并使用其属性。我想你需要后者：

    // create list of containers
    List<Containerdetails> containers = new  List<Containerdetails>();

    using (StreamReader sr = new StreamReader("c:/containervalues.txt"))
    {
        string line;

        while ((line = sr.ReadLine()) != null)
        {
             // create new instance of container for each line in file
             Containerdetails container = new Containerdetails();
             string[] Parts = line.Split(' ');
             // set non-static properties of container
             container.cocnum = Parts[0];  
             container.colength = Convert.ToDouble(Parts[1]);  
             container.coheight = Convert.ToDouble(Parts[2]);  
             container.codepth = Convert.ToDouble(Parts[3]);  
             container.covolume = Convert.ToDouble(Parts[4]);
             // add container to list of containers
             containers.Add(container);
        }
    }

附注 - 如果应用程序中只有一个容器，请考虑使用应用程序设置来保存App.config文件中的应用程序设置：

<appSettings>
  <add key="num" value="1"/>
  <add key="length" value="12.5"/>
  <add key="height" value="3.5"/>
  <add key="depth" value="10"/>
  <add key="volume" value="60.75"/>
</appSettings>

支持更容易，然后白色空格分隔数字。轻松获取应用程序设置

double depth = Double.Parse(ConfigurationManager.AppSettings["depth"]);

它给出了一个错误访问非静态成员需要一个对象引用`GetContainerDetails.Containerdetails.cnum

2 个答案: