lifesize room system

In the previous article, "restructuring the data center billing system (3)", I mainly introduced my understanding about the Dal layer, the factory layer, the interface layer, and the entity layer, but a lot of readers ask me again. What about your code? I am here to explain that I just wrote my understanding about those parts and didn't write or post the code for your research, however, it is not a good article that does not conform to the hearts of t

before the first time the computer room charges, using the database is someone else's, cognition can only be built on the basis of others, such as the "database system principle" after learning the book, then go to the previous database, found that the database really need further optimization, the following is my design database of some ideas, I hope you will make some more comments. Database Designe-r Mod

Computer room charge system has been carried out for a period of time, knocked over three layers, and then overturned the knock write seven layers. There is not much time to take out every day, so the project has been on for a long time. In the process of completion, the most difficult to start knocking out a line, a variety of check data, tune code, fortunately, the code in the difficulties and errors fina

In the computer room charge system, the students to checkout the most people headache. Because of the student's spending time (down time-machine time-on-machine preparation time) There are three kinds of situations:1. Consumption time 2. Consumption time 3. Consumption time > Minimum on-time, this situation also should consider increment unit time. For example, the increment unit time is 10 minutes, the con

DataGridView, translated into Chinese means data table display, using the DataGridView control, you can display and edit tables from different types of data sources, binding data to DataGridView controls is very simple and intuitive, in most cases, Just set the DataSource property, and when you bind to a database source that contains multiple lists or tables, you only need to set the DataMember property to the bound list or to the string of the table. Computer

In the C/S stage, we learned software engineering, UML, and VB. net, the design model, three-tier architecture, and a simple understanding of the C # language basics. With the accumulation of these theories, we began to use the data room charging system for practice, only by practicing this knowledge can you become a real person, because you can understand it deeply only when you are a real person. The ind

Development Plan include users, developers, managers, and analysts.1.2 Background Note: A. Name of the software system to be developed: Data Center Charging System B. Author: Professor mi Xinjiang Developers: 10 students User: all teachers and students of Langfang Normal University Computing Center or computer network for the software: Library Reading Room, Data

Project Development Plan (GB856T--88)1 Introduction 1.1 Writing Purpose A project development plan is a preliminary plan for determining the project to be developed. You need to have a rough understanding of the conditions required during the entire project development process. The intended readers of the Project Development Plan include users, developers, managers, and analysts.1.2 Background Note: A. Name of the software system to be developed: Dat

the process is difficult, it is still worth it. We learned a lot throughout the process. When the project really started, I forgot the time, forgot the progress control, and did not summarize the results and problems of the day, resulting in a delay of one month. In principle, at this stage, such a small project should not be completed in two months. But I still turn impossible things into possibilities. The lessons learned are always obtained at the end, and they always tell themselves at the

First, the use of the backgroundComputer room billing system when the demand is to select a user, at the same time display the use of registration, recharge and return card records, the data to provide checkout data, and after the checkout to update the card, recharge, return card table three tables, if directly write SQL statements will be very complex. These requirements can be encapsulated as a stored pr

-return card: Select * From t_card where status = 'do not use' and ischeck = 'uncheck' and [email protected] Select * From t_card where status = 'do not use' and logoutischeck = 'uncheck' and [email protected] By comparing these two SQL statements, we can know that, if you change the ischeck field to "checked" when you purchase a card, you cannot find this record when you check the card. After the origin of the registerischeck and logoutischeck fields is completed, let's talk about the orig

Hello everyone, I'm Lao Deng, a practitioner from Chongqing! Today, I can finally write "open-source information technology promotion in primary and secondary schools is promising (2 )! Ubuntu10.04 + Windows XP dual-system micro-host room completed! Now! I remember that at the end of May, I wrote my first post, http://www.linuxidc.com/linux/2010-10/29113p7.htm. I used the experiment's example to illustrate