entity framework select

"; Customer.subtime = "December 11, 2014"; Add the customer instance to the context and modify his state to modify the te. Entry3. Delete Customer. Id = 5; Customer.cusname = "Syq"; Customer.delflag = "1"; Customer.subtime = "December 11, 2014"; Add the customer instance to the context and modify his state to delete the te. Entry4. EnquiryQuerying a single piece of data with

. It's a bit long. I took a look at the bag-grab tool. As if I didn't tune the nuget image) Ps: Here we despise the DLLs inside the NuGet pants. I use my own machine. C:\Program Files (x86) \mysql\mysql Connector Net 6.9.9\assemblies\v4.5 5. Right-click Add data Model Select MySQL Conn then next. PostScript above is Ef5,ef6 will appear your project references the latest Entity

Both LINQ to SQL and the Entity Framework are object-relational mapping techniques that contain LINQ functionality. The essential difference between them is that EF does a better job of decoupling the database schema from the type of our query. With EF, the object we're querying is no longer a C # class that exactly corresponds to the database schema, but rather a higher-level abstraction: the

There are three modes for the development of the entity Framework Data Model: 1. Reference database mode; 2. New EF empty model mode in VS; 3. Code modeThe Entity Framework data model refers to the use of the Reference database method for development creation, as follows:Development environment: VS2012Database: SQL Ser

Are you ready? ↓2012-2-5 13:49:42 Environment: Operating system: Microsoft window 7 flagship ... Development tools: Visual Studio 2010 flagship ... VS extension: NuGet Package Manager Latest (my current version is 1.6.21215.9133) Database: Microsoft SQL Server (my current version is SQL Server 2005) ↓2012-2-5 13:49:54 A blah . The series should also be a patchwork, is currently in order to comb their understanding of the Entity

This article from: http://www.cnblogs.com/bluedoctor/archive/2011/08/10/2133983.html In general, our ORM framework usesSingle TableOrViewMap to oneEntity classSometimes stored procedures are mapped to object classes. If you do not want to write the stored procedures, how can these complex SQL queries be mapped to object classes? In fact, whether it is a single table, view, or stored procedure,SQL Server Table value functions, Custom SQL queries

Before introducing a few methods, give a picture, hope the author of the graph do not hold my stolen pictures. The content of this article is my self-study notes, self-taught content from the network. Hand code, must not be copied directly past, there will be a lot of typos or something. Entity SQL Similar to the SQL statement,SELECT VALUE C from entities.contactsThe value keyword indicates th

. After the model is created, (the edmx file is used to automatically generate the mapping code. Poco is not used ). Compared with using tables and views only, you need to select the stored procedure used by your table under the Mapping Details of the table to use the stored procedure as the datasource of the model. For example: In this example, there is only one stored procedure. We only need to select up

Original Name: Entity Framework 4.1: BASICS (1) original address: http://vincentlauzon.wordpress.com/2011/04/03/entity-framework-4-1-basics-1/ We can see the English tutorial recommended for Entity Framework 4.1. To help you look

I. Preface Browsing the ADO. Net blog found that Entity Framework has made significant progress over the past few years, especially in the past one or two years. Ef4.1 introduces support for the new dbcontext API and code first. EF 4.3, released earlier this year, provides support for code first migration, which allows developers to easily optimizeCodeTo improve the database architecture. EF5 is now releas

ADO. NET Entity Framework is the official ORM solution of Microsoft. Therefore, we can't help but remember the famous ORM solution in. NET Program Design-nhib.pdf from the open source. With the impressive appearance of VS2010, how will the new ADO. NET Entity Framework be presented to everyone? What problems does

Tags: Select test context MoS src time rate lin entityBefore you start, take a look at the official interpretation of the Entity Framework: The Entity Framework (EF) is a object-relational mapper that enables. NET Devel Opers to work with relational data using domain-specifi

). ObjectContext.ObjectStateManager.GetObjectStateEntry (user); Only the Name property of the entity and The Age attribute Setentry.setmodifiedproperty ("name") are modified; Setentry.setmodifiedproperty ("Age"); Db. SaveChanges (); Copy code 4, using transactions: It is very simple to use a transaction, just put the required operation in TransactionScope, and finally commit the copy code dbentity DB = new d

Implementation inheritance of MVC5 Entity Framework Learning You have learned how to handle concurrency exceptions. In this section, you will learn how to implement inheritance. In object-oriented programming, you can use inheritance to reuse code. Next, you will modify the Instructor and Student classes so that they can be derived from the Person base class. This base class contains the attributes common t

Before writing: After six months of Java + Silverlight development, I felt very happy to go back to Asp.net development on the pure MS Platform. many other times have been spent on Silverlight, so this time I went back to Asp.net and made a book plan for myself. first of all, C #4.0 and my favorite Entity Framework 4.0 Fortunately, I got the Entity

For more information about the features of Entity Framework 4, see this article. net 4 Entity Framework introduction, one of the most interesting is the support for poco: EF4 provides simple and traditional CLR object (plain old CLR object/POCO) support for entities. Your object can exist independently of EF, which bet

converted to the type of the runtime system.In the function body of After inserting some of the employee into our model, our first query was with ESQL. We construct an esql expression to invoke our two "model definition" functions and project the results into the Name and the Age column. The result of our ESQL expression is a collection of anonymous types that contain the name and age members. Because we are not returning a type defined in the model, so we createqueryIn LINQ queries, we retriev