entity framework select

Why is another data model required? So why do we need to build another model? As the company's data processing volume increases, streamline the data relationship and develop applications based on the data.ProgramIt becomes very difficult. Storage problems (such as data integrity, performance, and management) need to be considered in the design of the database architecture. Sometimes this is not easy to understand. These architectures often conflict with application structures, making developme

Label:3-2 updating using native SQL statementsProblem 　　You want to update the underlying data store by using native SQL statements in the Entity Framework. Solution Solutions Suppose you have a payment database table shown in 3-2, using the Entity Framework Designer tool to create a model that is shown in 3-2. Figure

The original series is from English. Tip 1: How to sort the relationship (Relationships) in Entity Framework) Problem: In the Entity Framework forum, you will often see questions about sorting associated projects. For example, imagine you want to query the customer and return the accounts that owe more than 30

Microsoft released the final version of Entity Framework (EF) 4.2. Although this update only contains one error correction, it is interesting that it applies Microsoft's semantic version control and they try to put EF and.. NET Framework, but they said the process was not as smooth as they expected. This error fix is related to an issue in EF 4.1 update 1. Accor

Reprinted: Learn the Code First and entityframework in Entity Framework I think it's good after reading it. it's suitable for learning materials and I will repost it. Link: http://www.cnblogs.com/Wayou/archive/2012/09/20/EF_CodeFirst.html This is an article written last week. It was written at the suggestion of the company's haoge. It was originally shared by the department for innovation. I will share it

, EntityState. modified); // 4. update the database context // dbFirst. saveChanges (); # endregion # region Query DBFirstEntities dbFirst = new DBFirstEntities (); foreach (var item in dbFirst. t_Customer) {Console. writeLine (string. format ("ID: {0} Name: {1}", item. ID, item. cusName) ;}# region linq expression T_Customer cs = (from customer in dbFirst. t_Customer where customer. ID = 2 select customer ). singleOrDefault (); Console. writeLine ("I

Entity Framework 6 Recipes Chinese translation series (14), entityframework For the original intention of translation and why I chose Entity Framework 6 Recipes, see the beginning of this series.3-6 set the default value in the query Problem 　　You have a use case that sets the default value for the corresponding proper

The DATABASEFIRST:EF framework automatically generates data layers and model based on the database. Project--Add--New item--Data--ado.net Entity Data Model--build from database--New connection--Select server name, database--[Yes, include sensitive data in connection string]--Select datasheet, view in database, Stored p

After one month of study, from the access to Silverlight to the completion of a first-class application framework, it is indeed quite tired. Originally, the bottom layer was quickly finalized, but due to the long debate during the selection, it took some time, while I was only responsible for the bottom layer, but due to the slow progress of the client team (the reason is hard to say ), this week, I started to take over the work in this area. After se

Based on. NET Microsoft ORM Framework Video Tutorial (Entity framework Technology)First Speaking ORM MappingSecond, the first knowledge entifyframework frameThird, LINQ expression queryThe four-way LINQ method queryV about LINQ to EntitiesSix talk ObjectQuery query (UP)Seventh talk ObjectQuery query (bottom)Eighth, adding and deleting of

Turn from: http://www.cnblogs.com/huangcong/archive/2011/07/20/1931107.html in the previous text template (T4) experience we already know the usefulness of T4, Here's a look at how you can use it to implement bulk modification of the class name in the Entity Framework. We all know that there is one way in the ADO Entity Data model to generate a data model from a