entity framework sqlite

This article is ADO. NET Entity Framework Series of articlesArticle 3: continue to demonstrate how to use the entity of ADO. NET Entity Framework as the data source of the data control to easily display data records in the Data Control. ADO. the first two articles of NET

From the blog Park development team to develop frontline news:In the Entity Framework, if entity A is associated with entity B, you want to load entity B while loading entity a. It is common practice to use include () in LINQ quer

Familiarity with the Entity Framework should be not unfamiliar to the film, he is the ADO Entity Data Model Wizard: You can automatically generate a model class for a database table, or create a model file for code first.However, this Model wizard only displays Microsoft's own SQL Server data source by default, and if you want to use a MySQL data source, you have

Entity Framework Quick Start -- ModelFirst, entity -- modelfirst Entity Framework not only facilitates operation, but also considers user friendly interaction. The perfect combination of EF4.0 and vs2010 is also a reason for us to choose it. Compared with Nhibernate Microsof

Http://www.cnblogs.com/dudu/archive/2012/04/13/entity_framework_include_where.htmlIn the Entity Framework, if entity A is associated with entity B, you want to load entity B while loading entity a. It is common practice to use inc

or view name, stored procedure name, or the parameters they require. You do not need to create the objects used to connect to the database, do not care about the structure of the returned data, and then use the code to convert them into objects. You only need to work with the conceptual model and code model entity classes. When you do this in the scope of EF, when EF is running, it processes database connections, database command generation, query

ArticleDirectory Entitycontainer Entityset Entitytype Association Navigation Properties Returns the navigation attribute of the set. Programming Entity FrameworkVersion 2Translation Index Metadata supported by the Model So far, you have only seen the concept of the model in the designer, and its edmx has a more important part: storage model and ing. Note: in fact, the edmx file contains four parts, but the fourth part

Entity Framework learning notes-EF introduction (an article tells you what EF is), entity learning notes Entity Framework is a data-oriented "Entity Framework" based on ADO. NET ". EF.

;namespacecodefirst_fluentapi_tutorials{ Public classSchoolcontext:dbcontext { PublicSchooldbcontext ():Base() { } PublicDbsetGet;Set; } PublicDbsetGet;Set; } protected Override voidonmodelcreating (Dbmodelbuilder modelBuilder) {modelbuilder.entityDelegate(entitymappingconfigurationstudentconfig) {studentconfig.properties (P=New{p.studentid, p.studentname}); Studentconfig.totable ("Studentinfo"); }); Action{m.properties (P=New{p.studentid, p.height, P.weight, P

Description of Entity notes corresponding to the automatic association query and automatic association update navigation properties of Entity Framework, entityframework I. First, I want to know about the automatic association query of Entity Framework: Automatic association

Entity Framework 6.0 supports enumeration/the primary key is reversed after the Entity is added. entityframeworkLab Go directly to the code and view the result Entity class [Flags] public enum FlagsEnum { Day = 1, Night = 2 } public class EntityWithEnum { public int ID { get; set;

When you generate an ADO. NET Entity Data Model (Entity Data Model) through a database, the number of entity classes generated may be less than the number of data tables. The following describes two possible causes. 1. All columns of the data table can be empty. When a data table has a primary key, the object data model uses the primary key as the

Today, I just learned the razor of MVC and used the Entity Framework together. The following error is returned: Cs0012: the type'System. Data. Objects. dataclasses. entityobject' IsDefinedInAn assembly thatIsNot referenced. You must add a reference to assembly'System. Data. entity, version = 4.0.0.0, culture = neutral, publickeytoken = b77a5c561934e089'.

Install Entity Framework Power Tools, 2015 entity on Visual Studio 2015 Entity Framework Power Tools is a very useful EF Code First plug-in. It allows you to easily generate model and dbcontext code that matches the database structure.This section describes how to switch th

Tags: event div sop ase Lap span onclick parent class interface1. Create an Entity Data Model using DB Frist modeDb Frist Create an Entity Data model (creating an EDMX is not the point, you can do it randomly), here named Zerocodedb, the resulting documents; Where the red box of the file (ZEROCODEDB.TT) is the entity's generated key code, that is, entity's T4 template file, this article is to move the knife

Entity Framework 6 Recipes 2nd Edition (9-5) Translation-> delete a disconnected Entity, entityrecipes 9-5. delete a disconnected entity Problem We need to delete the object retrieved from WCF. Solution Let's assume that we have the payment and Bill model of the entity as sh

Entity SQL is the SQL class language provided by the Ado.net Entity Framework to support the Entity Data Model (EDM). Entity SQL can be used for object queries and queries executed using the EntityClient provider. L Key Words Value keyword ESQL provides a SELECT value cla

Entity Framework object Framework formation journey -- using Fluent API configuration in Code First mode (6), -- codefluent The previous article Entity Framework formation journey-Code First Framework Design (5) introduced the exp

Validate EntityYou can write the custom server side validation for any entity. To accomplish this, override validateentity method of DBContext as shown below.protected OverrideSystem.Data.Entity.Validation.DbEntityValidationResult validateentity (Dbentityentry entityentry, system.collections.generic.idictionaryObject,Object>items) { if(entityentry.entity isStudent) { if(entityentry.currentvalues.getvaluestring> ("Studentname") =="") {

If lazy loading enable = true is not set in the Entity Framework, the handler must handle the loading of the metadata, for example, using load or include, however, because the include parameter number is string, it is very difficult for a person to find the parameter easily after tablename is changed with string, so I want to introduce an extension method. // Adventureworkslt2008r2entities context = new adv