厳密に型指定されたデータセットの問題

Question

私はユーザーがユーザー名とパスワードを作成して情報をデータベースに保存するC＃でTimeClockを作成しています。

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); 
    } 

} 
} 

：まあ、私はDataSetを参照するたび、私はエラーを取得する：「『TimeClockProject.loginsDataSet.Logins.Get』オブジェクト参照が非静的フィールド、メソッド、またはプロパティのために必要とされる」ここで

コードです

Answer 1

型付きのデータセットで問題が解決しました