entity framework book

Here, "On-Demand Update" refers to updating only the modified data. For example, when we open the casual editing page in the background of a blog, there is a lot of data that can be modified, but we only changed the casual title, and nothing else was changed, the database only updates the title field, which is updated on demand. Currently, we use a very backward method. A stored procedure with many parameters, No matter what information you modify, even if you only change the title, all fields

synchronization. Table structure and object structure synchronization is a great work of using ORM. EF has the default build tool, DB first, model first, Code first three modes to provide choices, plus automatic generation of synchronous SQL, the selectivity is now the most extensive, NH also has some corresponding generators, database priority of the Little Brother LINQ to SQL is the most amazing drag.in this scenario, with the use of related tools, ORM such as EF is suitable for sequencing op

From:http://www.1234.sh/post/pomelo-data-mysql?utm_source=tuicoolutm_medium=referralSourceSource code Open source in GitHub with the MIT protocol:Pomelo.Data.MySqlPomelo.EntityFrameworkCore.MySqlBackgroundOn a whim, I wanted to implement the MySQL ADO layer in. NET core and interface with the entity Framework Core, and also to despise the opportunity for a vendor to borrow at a time when Oracle officially d

Issue: After migrating the database using the Entity Framework, each time you modify the code (not the Model code), the error is:Models that support the "Xxxdbcontext" context have changed since the database was created. Consider migrating the update database (http://go.microsoft.com/fwlink/?LinkId=238269) using Code first.At this point the migration code generated by the execution of add-migration is empty

Entity Framework 6 Recipes 2nd Edition (11-4), recipes11-4 11-4. Call another "model definition" function in the "model definition" Function Problem You want to use a "model definition" function to implement another "model definition" function. Solution Assume that we have a company partnership with their structural model, as shown in Figure 11-4: Figure 11-4.A model representing the associate types in a c

Entity Framework 6 Recipes 2nd Edition (10-1) Translation-> returns an object set in non-Code Frist mode, recipesfrist Stored Procedure Stored Procedures exist in any type of relational database, such as Microsoft SQL Server. stored procedures are some code contained in the database. They usually perform some operations on the data. They can improve the performance of data-intensive computing and execute so

Oracle recently released Oracle Data Access Component (odac) 11. 2 rel 4, which adds the Entity Framework4.1 and 4.2 support. This allows. NET developers to use Oracle databases to apply this popular ORM tool and use LINQ to entities for data access without the need to write SQL statements. Although the new Provider supports EF, it does not support the latest features, such as the code first and dbcontext introduced in EF 4.1. In additionIn addition t