强类型数据集的问题

Question

我正在C#中制作一个TimeClock，用户在其中创建用户名和密码，然后将信息保存到数据库中。好吧，每次引用数据集时，我都会得到错误："非静态字段、方法或属性'TimeClockProject.loginsDatat.Logins.get'需要对象引用"

这是代码：

   using System;
   using System.Collections.Generic;
   using System.ComponentModel;
   using System.Data;
   using System.Drawing;
   using System.Linq;
   using System.Text;
   using System.Threading.Tasks;
   using System.Windows.Forms;
   using System.Security.Cryptography;
   using System.Data.Sql;
   using System.Data.SqlClient;

   namespace TimeClockProject
   {
       public partial class Form1 : Form
       {
           public Form1()
           {
               InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
    }
    private void AddUser(string username, string password, string confirmPass, string email)
    {
        //Loop through Logins Table
        foreach (DataRow row in loginsDataSet.Logins)
        {
            //And look for matching usernames
            if (row.ItemArray[0].Equals(username))
            {
                //If one is found, show message:
                MessageBox.Show("Username already exists");
                return;
            }
        }
        //Confirm pass must equal password.
        if (password != confirmPass)
        {
            MessageBox.Show("Passwords do not match");
        }
        //Password must be at least 8 characters long
        else if (password.Length < 8)
        {
            MessageBox.Show("Password must be at least 8 characters long");
        }
        //If there is no username
        else if (username == null)
        {
            MessageBox.Show("Must have Username");
        }
        //If all is well, create the new user!
        else
        {
            loginsDataSet.LoginsRow newUserRow = loginsDataSet.Logins.NewLoginsRow();
            string EncryptedPass = HashPass(password);
            newUserRow.Username = username;
            newUserRow.Password = EncryptedPass;
            loginsDataSet.Logins.Rows.Add(newUserRow);
            registerUserName.Text = String.Empty;
            registerPassword.Text = String.Empty;
            registerConfirmPassword.Text = String.Empty;
            MessageBox.Show("Thank you for Registering!");
        }
    }
    public string HashPass(string password)
    {
        SHA256 sha = new SHA256CryptoServiceProvider();
        //compute hash from the bytes of text
        sha.ComputeHash(ASCIIEncoding.ASCII.GetBytes(password));
        //get hash result after compute it
        byte[] result = sha.Hash;
        StringBuilder strBuilder = new StringBuilder();
        for (int i = 0; i < result.Length; i++)
        {
            //change it into 2 hexadecimal digits
            //for each byte
            strBuilder.Append(result[i].ToString("x2"));
        }
        return strBuilder.ToString();
    }
    private void registerButton_Click(object sender, EventArgs e)
    {
        AddUser(registerUserName.Text, registerPassword.Text, registerConfirmPassword.Text, registerEmail.Text);
    }
}
}

Answer 1

修复了这些问题，取消了类型化数据集