C# 错误CS1061“”未包含“”的定义，并且找不到可接受第一个“”类型参数的扩展方法“”

[addsyc]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private int i;
        private double[] student;
       
        public Form1()
        {
            InitializeComponent();
            HtmlDocument doc = webBrowser1.Document;
            HtmlElement btn = null;
            foreach (HtmlElement em in doc.All)
            {
                string str = em.Name;
                if ((str == "userid") || str == "passwd" || str == "IbtnEnter") 
                {
                    switch (str)
                    {
                        case "userid": em.SetAttribute("value", student[i].Sno);
                            break; 
                        case "passwd":
                            em.SetAttribute("value", student[i].Id);
                            break; 
                        case "IbtnEnter": btn = em;
                            break;
                        default: break;
                    }
                    try
                    {
                        btn.InvokeMember("click"); //触发submit事件 
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.ToString());
                    }

                    FileStream fs = new FileStream("I:\\ws.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite);
                    StreamReader m_streamReader = new StreamReader(fs);
                    //用StreamReader类来读取文件 
                    m_streamReader.BaseStream.Seek(0, SeekOrigin.Begin);
                    //从数据流中读取每一行，直到文件的最后一行 
                    string strLine = m_streamReader.ReadLine();
                    while (strLine != null)
                    {
                        // 这里处理每一行 
                        strLine = m_streamReader.ReadLine();
                        student.Add(fillStu(strLine));
                    }
                    m_streamReader.Close();




                }
            }
        }

        private object fillStu(string strLine)
        {
            throw new NotImplementedException();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void webBrowser2_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {

        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {

        }
    }
}

[woaipb]

你定义了 double[] student,那么每个student的类型都是 double ， Sno不是 double的成员变量，所以报错，Id也是同样的原因,Addye也是 你应该是这样： 定义一个类： public class Student { public string Sno; public string Id; } 然后定义 public Student[] student; 这样就可以使用 student[i].Sno和student[i].Id了。

[正怒月神]

先定义一个 Student类 然后 将double[] student 改成 Student[] student