entity framework insert

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

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") =="") {

ASP. NET MVC model (Create model class using Entity Framework)-Part.1The purpose of this tutorial is to explain how to use the Microsoft Entity Framework to create a data access class when you create an ASP. NET MVC application. This tutorial assumes that you have no prior knowledge of the Microsoft

The purpose of this tutorial is to explain how to use the Microsoft Entity Framework to create a data access class when you create an ASP. NET MVC application. This tutorial assumes that you have no prior knowledge of the Microsoft Entity Framework. After reading this tutorial, you will understand how to use the

Before writing the data Layer D layer when there are many SQL statements, how to omit the tedious SQL statements, Microsoft provides a good way-Entity Framework-entity framwork. An object mapping mechanism that supports. NET developers use domain-specific objects to come out of relational data, eliminating the need for most of the data access code that developers

By default, only the reference of the LINQ assembly is added to Web. config generated in MVC. If Entity Framework (EF) is used as the orm of MVC, you need to add the Assembly reference in webconfig: For example: ...... Asp.net MVC 2 cocould not load type 'System. Web. MVC. viewpage If problems such as cocould not load type 'System. Web. MVC. viewpage Code Code highlighting produced by Actipro CodeHighlight

The purpose of this tutorial is to explain how to use the Microsoft Entity Framework to create a data access class when you create an ASP. NET MVC application. This tutorial assumes that you have no prior knowledge of the Microsoft Entity Framework. After reading this tutorial, you will understand how to use the

Ado. netEntity Framework Overview The new version of ADO. NET features the New Entity Framework. It allows developers to focus on data through the Object Model (instead of the logical/Relational Data Model. The Entity Framework helps to abstract the logical data architectu

Entity Framework object Framework formation tour-several typical operations on the interface (8), entityframework In the previous article, "The Journey of Entity Framework formation -- separation and combination of data transmission model DTO and

From Zhang Ziyang http://www.cnblogs.com/JimmyZhang/archive/2009/05/18/1459326.html The purpose of this tutorial is to explain how to create an ASP. net mvc application.ProgramHow to use Microsoft Entity Framework to create a data entity class. This tutorial assumes that you have no knowledge of Microsoft Entity

root). IRepository interfacein ABP, the warehousing class implements the IRepository interface. The best way to do this is to define different interfaces for different storage objects. An example of a warehouse interface declaration for a person entity is shown below: Public interface ipersonrepository:irepository IPersonRepository inherits from Irepository Public interface Ipersonrepository:irepository For warehousing cla

In the previous chapters, we have designed a simple domain model, and then we want to be able to implement the domain model persistence and query. In Apworks, a warehousing infrastructure for the entity Framework, NHibernate, and MongoDB is implemented. In this section, I'll show you how to use the Entity Framework-bas

Apworks Framework practice (6): using the Entity Framework-based warehouse infrastructure, apworksentity In the previous chapter, we have designed a simple domain model. Next we hope to realize the persistence and query of the domain model. Apworks provides the warehousing infrastructure for Entity

return results as stronugly typed objects, and call stored procedures that return strongly typed results through stronugly typed methods. A key design principle of LINQ to SQL is that it "just work" for the common cases; so, for example, if you access a collection of orders through the orders property of a customer, and that customer's orders have not previusly been retrieved, LINQ to SQL will automatically get them for you. LINQ to SQL relies on convention, for example default

your system administrator. "); Return View (student); }The above code is similar to the HttpPost create method, but the difference is that a flag bit is set in the entity to indicate that it has been changed, rather than adding entities created by the model binder to the entity set. When the SaveChanges method is called, the modified flag causes the Entity