Please Finish Methods for Login Screen

[DarrenOosthuizen]

Hi There

Please finish all the methods needed on the frmLoginScreen

Please implement the following

• Userfield can only contain string values. No numbers allowed
• Password can be any value
• If the user attempts to Sign in with no data inserted. Display error message to insert data
• Please check that both fields do not contain empty values or blank spaces such as by tabbing or pressing space
• When they click login button, take the username and search through tbluser to find record, Return that object
• If no userfound then display message username/password incorrect
• Take the salt which is located in the record and the password they have entered and hash it to see if it matches the password inside the record
• If matches go to frmDashBoard
• If not simply a message that username or password is incorrect and then clear both edits and set focus to username
• Do not say that the username is wrong or that the only the password is wrong. Simply say username/password incorrect

So when you retrieve the user salt from tblUser run the CreateSH256Hash with the password and salt as input

Then take the return string and match it against the password in the record

public String CreateSHA256Hash(string input, string salt)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(input + salt);
            SHA256Managed sha256hashstring = new SHA256Managed();
            byte[] hash = sha256hashstring.ComputeHash(bytes);

            return ByteArrayToStrng(hash);
        }

```
private static string ByteArrayToStrng(byte[] ba)
    {
        StringBuilder hex = new StringBuilder(ba.Length * 2);
        foreach (byte b in ba)
        {
            hex.AppendFormat("{0:x2}", b);
        }
        return hex.ToString();
    }

[DarrenOosthuizen]

PS!! Remeber to go from presentation layer ---> Business Access Layer -->Data Access Layer

[Plage25]

Hey,

all done.