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好的，我正在为我的学校项目做一个银行申请，我将 Microsoft Access 与 Visual Studio 结合起来，我在 Access 中有信息，我用 Visual Studio 检索它们。

        OleDbConnection connection;
        yhteys = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0; Data Source= tilit.accdb");
        try
        {
            connection.Open();

        }
        catch (OleDbException tietokantavika)
        {
            Console.WriteLine("No connection!\n" + tietokantavika.Message);
            return;
        }
        OleDbCommand haekomento = new OleDbCommand();
        haekomento.Connection = yhteys;
        haekomento.CommandText = "Select clientnumber, accountNumber,pinCode, money FROM Account";
        OleDbDataReader  lukija = haekomento.ExecuteReader();
        while (lukija.Read())
        {

            string accountNumber2 = (string)lukija["accountNumber"];
            int pinCode2 = (int)lukija["pinCode"];
            decimal money2 = (decimal)lukija["money"];
            int clientNumber2 = (int)lukija["clientNumber"];




            if ((txtAccountNumber.Text == accountNumber2) && int.Parse(pinCode.Text) == pinCode2)
            {
                Menu GoToMenu = new Menu();
                GoToMenu.Show();
            }
            else
                lblväärä.Text = "Wrong pin or account!";

所以我用注册给史蒂夫布什的账号 1111-1111 和密码 1111 登录

这里的问题是，当我登录并进入菜单表单时，它以错误的用户身份登录。它应该以 Steve Bush (clientNumber 1) 的身份登录，但它以 Greg Ott (clientNumber 3) 的身份登录。我认为问题是因为我一直使用相同的连接，但我不知道如何解决它。我的表格 2

 OleDbConnection connection;
            yhteys = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0; Data Source= tilit.accdb");
            try
            {
               connection.Open();

            }
        catch (OleDbException tietokantavika)
        {
            Console.WriteLine("No connection!\n" + tietokantavika.Message);
            return;
        }
        OleDbCommand haekomento = new OleDbCommand();
        haekomento.Connection = yhteys;
        haekomento.CommandText = "Select  clientNumber, firstName, lastName FROM Client";




        OleDbDataReader lukija = haekomento.ExecuteReader();

        while (lukija.Read())
        {
            int clientNumber2 = (int)lukija["clientNumber"];
            string lastName2 = (string)lukija["lastName"];
            string  firstName2 = (string)lukija["firstName"];


            lblNimi.Text = "Welcome" + firstName2  + lastName2; // Here it should display Steve Bush but instead it says Greg Ott

我知道我在该代码中犯了很多错误，这就是我来这里寻求帮助的原因。我已经坚持了几个小时，不知道如何解决它。

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