public partial class frmLogin : Form
    {
        // public static bool blCanLogin = false;
         public static string strUser = "";
         private DataSet ds = new DataSet();
         private DataTable myTable;
         private DataRow myRow;
         private string sendStrSQL = "select * from LoginPwd";// where Name="+this.textBox1.Text();        public frmLogin()
        {
            InitializeComponent();            DataBase db = new DataBase();
            string sendTableName = "LoginPwd";
            this.ds = db.SelectDataBase(sendStrSQL,sendTableName);
            this.myTable = ds.Tables[0];
            this.TopMost = true;
        }        private void button2_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }        private void button1_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < myTable.Rows.Count; i++)   //这个提示检测到不能访问代码
            {
                this.myRow = myTable.Rows[i];
                if (myRow[0].ToString().Trim() == this.textBox1.Text.ToString().Trim() && myRow[1].ToString().Trim() == this.textBox2.Text.ToString().Trim())
                {
                    MessageBox.Show("legal user");
                    this.Close();
                    return;
                }
                else
                {
                    MessageBox.Show("illegal user");
                    Application.Exit();
                    return;
                }
            }
            
            
        }
    }
请问一下是什么原因啊,我弄啊半天都没有弄出来