Entity Framework Code First

The full name of the Entity framework is the Ado.net Entity framework, the Ado.net based ORM (object/relational Mapping) architecture developed by Microsoft. The main features of the Entity framework: 1. Supports multiple databases (Microsoft SQL Server, Oracle, and DB2); 2. Strong mapping engine, well supported storage ...

A, virtualization virtualization refers to the ability to simulate multiple virtual machines on the same physical machine. Each virtual machine has a separate processor, memory, hard disk, and network interface logically. The use of virtualization technology can improve the utilization of hardware resources, so that multiple applications can run on the same physical machine with each other isolated operating environment. There are also different levels of virtualization, such as virtualization at the hardware level and virtualization at the software level. Hardware virtualization refers to the simulation of hardware to obtain a similar to the real computer environment, you can run a complete operating system. In the hardware virtual ...

This series of articles is a learning record about the fundamentals of azure services development, and because of time constraints, the process of wishing to discuss and explore yourself is from scratch, to be able to develop basic programming for azure services. There may be a very deep topic relative to each topic, and I would like to have time to do it through other articles. 　　The positioning of this series is basically positioning, take 20-30 minutes, download the code first, follow the article, run to get the relevant experience. The previous article is about Azure queue storage, this is about ...

As a child, the teacher asked me, what is your ideal? I said it was an engineer, so I grew up to be an engineer. Work for so many years, has been thinking about the meaning of the engineer three words, and finally one day, the original is: the use of technical means to improve the world. So, in terms of software, what are the problems that need to be addressed in the current world? There are some questions to consider: Now the whole world is the degree of informatization is high or low? Is the number of programmers enough? Is the productivity of the software industry high or low? Are most software systems reliable? I want to say that since ...

This article is my second time reading Hadoop 0.20.2 notes, encountered many problems in the reading process, and ultimately through a variety of ways to solve most of the. 　　Hadoop the whole system is well designed, the source code is worth learning distributed students read, will be all notes one by one post, hope to facilitate reading Hadoop source code, less detours. 1 serialization core Technology The objectwritable in 0.20.2 version Hadoop supports the following types of data format serialization: Data type examples say ...

This paper is an excerpt from the book "The Authoritative Guide to Hadoop", published by Tsinghua University Press, which is the author of Tom White, the School of Data Science and engineering, East China Normal University. This book begins with the origins of Hadoop, and integrates theory and practice to introduce Hadoop as an ideal tool for high-performance processing of massive datasets. The book consists of 16 chapters, 3 appendices, covering topics including: Haddoop;mapreduce;hadoop Distributed file system; Hadoop I/O, MapReduce application Open ...

The distributed computing technology proposed by Google makes it easy for developers to develop global application services, and cloud computing technology automates the management of communication, task allocation, and distributed storage among a large number of standardized (heterogeneous) computers. 　　The cloud comes from a decentralized, parallel operation, but better than the grid. Data computing cloud technology can be considered as a sub-set of grid technology, both of which are designed to hide the complexity of the system, so that users need to use it without knowing how the system works inside. The parties follow up with Google to promote cloud services, but the definition is different ...

The increasingly fierce competition has made the living environment of the real bookstore deteriorate, and the closing up of the closed door is growing. Many entity bookstores in the store mode of innovation or characteristics of the operation of painstaking effort to improve profitability.　　Among them, prudential products to a foothold in boutique bookstores, to open up a sideline to feed the book model or will be struggling in the physical bookstore to provide some reference. In Guangzhou Book Center entrenched 16 years of Sanlian announced on July 31, 2010, after five sheep branch, the East branch of the city, Guangzhou, the third home Sanlian sadly away from the field. This is not a case. June 2010, operating 6 years of learning and excellent bookstore Canton Jinan ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall O2O is the recent big hot vocabulary, especially after Ma mentioned. In fact, do not like the word O2O, not only that the abbreviation is not directly to express the intention of the online2offline, or the opposite of Offline2 online easily confused, and no matter offline and online are too large two baskets, Leads to the idea that the whole concept will involve too much stuff to make ...

Today has entered the web2.0 high-speed development of the internet era, a variety of Internet Web applications have sprung up. So how do you develop a good Web application as a Web developer? There is no simple answer to this question, even the educational institutions may not be able to know clearly. So, like most web developers in this field, we only learned this by doing experiments. No one tells us how to do it, we start by doing something for ourselves, learn how to develop Web applications in this ...