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I want to make an account system with login and register. I already have the login system, this is also connected to the database. However, the passwords are not hashed. I can't find any help on how to do the hashing in connection with the database and the same thing with a register system.

What I have tried:

private void btn_login_Click(object sender, RoutedEventArgs e)
            SqlConnection sqlCon = new SqlConnection("Server=xxxxx;Database=x;User Id=xxx;Password=xx;");
                if (sqlCon.State == System.Data.ConnectionState.Closed)
                String query = "SELECT COUNT(1) FROM tblUser WHERE Username=@Username AND Password=@Password";
                SqlCommand sqlCmd = new SqlCommand(query, sqlCon);
                sqlCmd.CommandType = System.Data.CommandType.Text;
                sqlCmd.Parameters.AddWithValue("@Username", txtUsername.Text);
                sqlCmd.Parameters.AddWithValue("@Password", txtPassword.Text);
                int count = Convert.ToInt32(sqlCmd.ExecuteScalar());
                if (count == 1)
            catch (Exception ex)

private static string GetSHA384(string userID, string password)
    // SHA classes are disposable, use using to ensure any managed resources are properly disposed of by the runtime
    using SHA384 sha = new SHA384CryptoServiceProvider();

    // convert the username and password into bytes
    byte[] preHash = Encoding.ASCII.GetBytes(userID + password);

    // hash the bytes
    byte[] hash = sha.ComputeHash(preHash);

    // convert the raw bytes into a string that we can save to a database
    return Convert.ToBase64String(hash);
Updated 31-Jul-21 2:55am
Richard MacCutchan 31-Jul-21 9:16am
Storing passwords in clear text is a recipe for disaster.
Richard Deeming 2-Aug-21 6:20am
You have already posted this question:
Wpf C# login system with hashing[^]

1 solution

Have a look here: Password Storage: How to do it.[^]

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