private void button1_Click(object sender, EventArgs e)//确认修改密码 { temp = Global.con.ConnectionString; //data source=G:\NAMEIT2.mdb;provider=Microsoft.Jet.OLEDB.4.0;mode=12;Jet OleDb:DataBase Password=123 OldPWD = temp.Substring(temp.IndexOf("Password") + "Password".Length + 1);//包括“=”占用的 NewPWD = textBox2.Text; if (textBox1.Text == OldPWD) { M.AlterDBPWD(OldPWD == "" ? "null" : OldPWD, NewPWD == "" ? "null" : NewPWD);//是空密码则切换为null } else { MyDialog.Msg("验证失败。", 3); textBox1.Text = ""; textBox1.Focus(); return; } MyDialog.Msg("密码已更新!即将重新登录。", 1); CentralForm.Logout(); }