Random r = new Random();

                    int ID = r.Next();//设置初始帐号

                    int balance = 0;

                    string str1 = textBox1.Text;

                    string str2 = textBox2.Text;

string ConStr = "Provider=Microsoft.Jet.OLEDB.4.0;data source=D:\\Bank.mdb";

                        OleDbConnection con = new OleDbConnection(ConStr); 

                        con.Open();

                        if (con.State == ConnectionState.Open)

                            MessageBox.Show("连接成功！", "数据库状态信息");

                        else

                            MessageBox.Show("ERROR!", "数据库状态信息");



                        string sql = "insert??Bank(账号,姓名,密码,余额) VALUES('"+ID+"','"+str1+"','"+str2+"','"+ balance+"')";

                    

                        OleDbCommand cmd = new OleDbCommand(sql, con); 

                        cmd.ExecuteNonQuery();

                        cmd.Dispose();

                        con.Close();