//保存账户 private void but_Close_Click(object sender, RoutedEventArgs e) { ConfigXML xmlOP = new ConfigXML(); if (tb_UserID.Text.ToString() == null || tb_UserPW.Password.ToString() == null) { MessageBox.Show("请输入账号或密码!"); tb_UserID.Text = ""; tb_UserPW.Password = ""; return; } if (tb_UserID.Text.ToString().Length != 8 || tb_UserPW.Password.ToString().Length != 8) { MessageBox.Show("密码和账户必须为8位!"); return; } xmlOP.setUserID(tb_UserID.Text.ToString()); xmlOP.setUserPW(tb_UserPW.Password.ToString()); }