entity framework insert

Enable Entity Framework to support multiple databases Luo chaohui (http://kesalin.cnblogs.com /) This article follows the "signature-non-commercial use-consistency" creation public agreement EF supports SQL Server very well, both code first, model first, and database first, but it is not so friendly to non-Microsoft databases, currently, the only guarantee is that database first supports most datab

Spent 5, 6, and July on a busy day, and now take some time to make some basic memories of the use of the Entity Framework.What is the Entity Framework?The Entity Framework (EF), like our familiar ADO, provides objects for accessing and manipulating databases, but they are al

Recently, I used ASP. net mvc Entity Framework to develop some projects, which makes it very easy to use. As a result, I have witnessed the development of Microsoft technology: -In this figure, we can clearly see the changes in data access methods. If you want to know about ADO. NET Entity Framework, you can directly

Recently, a project needs to support both SQL Server and SQLite. Although the Entity Framework still has many shortcomings, it basically meets the requirements of my project. In addition, I also hope to make an attempt. After all, although the use of past technologies and techniques may be more reliable, more skilled, and less risky, in the technology industry, you cannot stop. If a new technology has some

virtualize two navigation properties (Blog.posts and Post.blog). This enables the lazy load feature of the Entity Framework. Lazy loading means that when you try to access the contents of these properties, it is automatically loaded from the database. 3. Create context You can now define a derived context that represents a session of the database so that we query and save the data. We define a context that

Here is a note of the problems that were encountered before using the entity Framework (4.3.1 version). Update table with no primary key set By default, the EF cannot update, insert, and delete a table that does not have a primary key. Viewing the edmx file in XML, you can see the following XML fragment in SSDL (I've defined a table Tb_withoutkey without a prim

ADO. NET Entity Framework, that is, the next generation of ADO. net. It is a more powerful ORM than LINQ to SQL. Developers only need to focus on the development of object models in the domain, rather than how they interact with relational databases. The previous article briefly introduced how to use the ADO. Net object framework in the project. From now on, it o

Label:There is a workaround on the internet as follows: Http://www.cnblogs.com/stone_w/archive/2012/10/25/2738345.html But I tried. It's too much trouble, and once the EF is rebuilt and rebuilt. Later I queried the information, can use the T4 template to solve this problem. 1. Download file getsummery.ttinclude, here I have provided, everyone to download: download 2. Unzip the files we downloaded and put the extracted files into the solution3. Modify the followingapp.config, add a connection st

To start using Entity Framework 6 and Visual Studio are necessary to install MySQL for Visual Studio 1.1.1 Beta and My SQL connector/net 6.8.1 BetaMySQL for Visual Studio 1.1.1 Beta can is downloaded with the following link:Https://cdn.mysql.com/Downloads/MySQLInstaller/mysql-visualstudio-plugin-1.1.1.msiMySQL connector/net 6.8.1 Betahttp://dev.mysql.com/downloads/connector/net/To-start working with VS. and

I keep thinking about what the stored procedure can do for our applications in EF?. SP execution efficiencyI have seen the performance analysis report of the ado.net team on EF and the comparison of the performance of the LINQ to entity, esql, and SQL statements,ADO. NET Entity Framework Performance Comparison Exploring-the-performance-of-the-ado-net-

), etc.interface-based abstract class Efrepositorybase in 4.Repository modeWe use an abstract class efrepositorybase to implement the methods in the interface, so that derived classes have methods defined in the interface and prevent Efrepositorybase from being instantiated directly. Public Abstract classEfrepositorybasewheretentity:baseentity {efcontext EF=NewEfcontext (); PublicDbsetEntities {Get{returnEf. Set(); } } Public intInsert (TEntity ent