When To Use Entity Framework

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 ...

The count query statement generated by entity Framework 4 was previously found to be a problem with the paging SQL statement that it generated today, and LINQ to SQL does not. 　　>>> take a look, and see! On code: Look at the generated SQL statement: 1. 　　Entity framework-generated SQL: A top, three from. 2. LINQ to SQL generated sql: ...

When you develop a Web site using the Entity Framework in. Net 3.5, you encounter a problem: When you add a record, you cannot use the default value of the database for datetime-type data. 　　The specific situation is this, my database has a users table, three fields, Id,username,createtime. ID is int type, since growth, primary key username is Nvchar (10) type, not allowed to be empty createtime is da ...

The scheme has been successfully applied, which can realize the standard and efficient internationalization software development, and reduce the time and effort needed for software development. The development of Internet has promoted the communication of the whole world, it needs to develop the WEB application that satisfies the requirements of different regions ' language, culture and living habits, therefore, the internationalization of software has become the problem that must be solved. At home and abroad, there are some deficiencies in internationalization methods: Existing Dynamic Data internationalization solutions are not easy to transplant and reuse. There is no out-of-the-box Dynamic Data internationalization solution or framework. To solve the above problems, we need to propose a dynamic ...

Openxava is a simple framework for using XML and Java to develop j2eehttp://www.aliyun.com/zixun/aggregation/6441.html "> Business applications." Openxava does not use the common MVC architecture, which is a JPA application engine that enables you to persist the Run-time entity objects into a database by JDK5.0 annotations or XML to describe the mapping relationship of the object-relational table. Use Openxava ...

Openxava is a simple framework for using XML and Java to develop j2eehttp://www.aliyun.com/zixun/aggregation/6441.html "> Business applications." Openxava does not use the common MVC architecture, which is a JPA application engine that enables you to persist the Run-time entity objects into a database by JDK5.0 annotations or XML to describe the mapping relationship of the object-relational table. Use Openxava ...

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 ...

Introduction: It is well known that R is unparalleled in solving statistical problems. But R is slow at data speeds up to 2G, creating a solution that runs distributed algorithms in conjunction with Hadoop, but is there a team that uses solutions like python + Hadoop? R Such origins in the statistical computer package and Hadoop combination will not be a problem? The answer from the king of Frank: Because they do not understand the characteristics of R and Hadoop application scenarios, just ...

The intermediary transaction SEO diagnoses Taobao guest cloud host technology Hall person Introduction: Jack chen--"Pet Shop" the chief architecture architect, has the rich software design and modelling experience, but is skeptical to the new thing. Wang--"Pet Shop" general manager, after studying abroad from the United States to create a "pet Shop" website. 　　The easy way to succeed has made him a stubborn and bossy style. Spark--jack Chen's university classmate, a commercial software company's senior counselor ...

Description: Jack chen--, the chief architect of the pet store, has extensive experience in software design and modeling, but is skeptical about new things. Wang--"Pet Shop" general manager, after studying abroad from the United States to create a "pet Shop" website. The easy way to succeed has made him a stubborn and bossy style. Spark--jack Chen's university classmate, a senior consultant at a business software company. Recent enthusiasm for promoting "domain-driven design" best practices. The primer is like the gods that everyone has heard ...