Небольшая ошибка, я не могу понять,

Question

получил одну крошечную ошибку и за любовь меня я не знаю, почему:

Ошибка 1 Имя «электронная почта» не существует в текущем контексте C: \ Users \ Янко \ Desktop \ Новая папка \ Эспрессо студии C \ Эспрессо студии C \ Эспрессо студии C \ Form1.cs 135 C 69 Эспрессо студии

Ошибка находится по адресу:

 public string HashPass(string password) 
     { 
      SHA256 sha = new SHA256CryptoServiceProvider(); 

      //compute hash from the bytes of text 
      sha.ComputeHash(ASCIIEncoding.ASCII.GetBytes(password + email)); // Error occurs here at email. 

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.Text.RegularExpressions; 
using System.Net; 
using System.Net.Mail; 
using System.Security.Cryptography; 

namespace Espresso_Studio_s_C 
{ 
    public partial class Form1 : Form 
    { 
     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void label1_Click(object sender, EventArgs e) 
     { 

     } 

     private void tabPage2_Click(object sender, EventArgs e) 
     { 

     } 

     private void loginsBindingNavigatorSaveItem_Click(object sender, EventArgs e) 
     { 
      this.Validate(); 
      this.loginsBindingSource.EndEdit(); 
      this.tableAdapterManager.UpdateAll(this.loginsDataSet); 

     } 

     private void Form1_Load(object sender, EventArgs e) 
     { 
      // TODO: This line of code loads data into the 'loginsDataSet.Logins' table. You can move, or remove it, as needed. 
      this.loginsTableAdapter.Fill(this.loginsDataSet.Logins); 

     } 

     private void registerButton_Click(object sender, EventArgs e) 
     { 
      AddUser(registerUserName.Text, registerPassword.Text, registerConfirmPassword.Text, registerEmail.Text); 
     } 





     private void AddUser(string username, string password, string confirmPass, string email) 
{ 
    //Local variables to hold values 
    string smtpEmail = smtpUserNameTextBox.Text; 
    string smtpPassword = smtpPasswordTextBox.Text; 
    int smtpPort = (int)smtpPortNumericUD.Value; 
    string smtpAddress = smtpAddressTextBox.Text; 

    //Regex for making sure Email is valid 
    Regex regex = new Regex(@"^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$"); 
    Match match = regex.Match(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 email is NOT valid 
    else if (!match.Success) 
    { 
     MessageBox.Show("Invalid Email"); 
    } 
    //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; 
     newUserRow.Email = email; 

     loginsDataSet.Logins.Rows.Add(newUserRow); 
     registerUserName.Text = String.Empty; 
     registerPassword.Text = String.Empty; 
     registerConfirmPassword.Text = String.Empty; 
     registerEmail.Text = String.Empty; 
     MessageBox.Show("Thank you for Registering!"); 
     if (String.IsNullOrWhiteSpace(smtpEmail) || String.IsNullOrWhiteSpace(smtpPassword) || String.IsNullOrWhiteSpace(smtpAddress) || smtpPort <= 0) 
     { 
      MessageBox.Show("Email configuration is not set up correctly! \nCannot sent email!"); 

     } 
     else 
     { 
      SendMessage(email.ToString(), username.ToString(), password.ToString()); 
     } 
    } 
} 

     public string HashPass(string password) 
     { 
      SHA256 sha = new SHA256CryptoServiceProvider(); 

      //compute hash from the bytes of text 
      sha.ComputeHash(ASCIIEncoding.ASCII.GetBytes(password + email)); // Error occurs here 

      //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(); 
     } 

     public void SendMessage(string ToAddress, string ToName, string password) 
     { 

      var client = new SmtpClient(smtpAddressTextBox.Text, (int)smtpPortNumericUD.Value) 
      { 
       Credentials = new NetworkCredential(smtpUserNameTextBox.Text, smtpPasswordTextBox.Text), 
       EnableSsl = true 
      }; 
      client.Send(smtpUserNameTextBox.Text, ToAddress, "Thank You!", "Thank you for registering with us today! \n Your username/passwords are: \n \nUsername: " 
                     + ToName.ToString() + "\nPassword: " + password.ToString()); 
     } 

     private void loginButton_Click(object sender, EventArgs e) 
     { 
      //Locals to hold values 
      string username = loginUserName.Text; 
      string password = HashPass(loginPassword.Text); 


      //Loop through database 
      foreach (DataRow row in loginsDataSet.Logins) 
      { 
       //And search for Username and Pass that match 
       if (row.ItemArray[0].Equals(username) && row.ItemArray[1].Equals(password)) 
       { 
        loginUserName.Text = String.Empty; 
        loginPassword.Text = String.Empty; 
        MessageBox.Show("Login Success"); 
        break; 
       } 
       //If not, then show this message. 
       else 
       { 
        MessageBox.Show("Username/Password incorrect"); 
        break; 
       } 
      } 
     } 


    } 
} 

Answer 1

Метод AddUser получает переменную электронную почту. Это параметр и, следовательно, это локальная переменная, видимая только внутри метода AddUser. Никакие другие методы не могли видеть или использовать его, если вы не передать переменную в качестве параметра или присвоить его глобальной переменной (не рекомендуется)

private void AddUser(string username, string password, string confirmPass, string email) 

Таким образом, вы должны передать эту переменную методу HashPass

.... in AddUser ..... 
else 
{ 
    loginsDataSet.LoginsRow newUserRow = loginsDataSet.Logins.NewLoginsRow(); 
    string EncryptedPass = HashPass(password, email); 
    .... 
} 
... 

public string HashPass(string password, string anEmailAddress) 
{ 
    SHA256 sha = new SHA256CryptoServiceProvider(); 

    //compute hash from the bytes of text 
    sha.ComputeHash(ASCIIEncoding.ASCII.GetBytes(password + anEmailAddress)); 

    .... 
}