mvc database connection without entity framework

A summary of connection queries by using the Entity Framework Recently, I was working on a project that used the combination of linq and EntityFramework to process database operations. I have been using it for almost a year. I found that some tips should be noted. I would like to make a summary and hope to help my frie

. 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 Framework; However, the versi

Tags: User connection Why first page def attribute direct carriage return Learning materials: http://msdn.microsoft.com/zh-cn/data/jj193542 Video built by the console application, I'm using MVC here. One, very magnetic, very elegant Very like to see this person's video, although I do not understand, I do not know what his name. His voice is very magnetic, let me ... Let me...... , don't tire of hearing. Did

doing so will invade the entity code, and the entity code should be clean and independent of EF and Database properties. Refer to Document: https://msdn.microsoft.com/en-us/library/jj591583 (v=vs.113). aspx for information on how to use attributes to modify properties and relationships Summary:This chapter describes how the relationship between the

VS introduces the powerful functionality of the Entity Framework, making it possible to quickly build a DB based application. For the Entity Framework This article does not do too much description, is actually Microsoft version of the O-r Mapping. This article only talks about how to dynamically modify the information

Label:In EJB 2.x, EJB has 3 types of beans, namely session bean, message-driven bean (Message-driven Bean), and entity bean. with the introduction of EJB 3, Entity beans in EJB2.x are gradually replaced by the JPA specification, which can be used not only in EJB environments, but also in Java SE, Java EE environments , relative to entity beans in EJB 2.x , it has

This article is a series of ASP. NET 4.0 and entity framework 4ArticleThe first article, this series will show you how to use entity framewok4 to Develop ASP. NETProgram. The article will teach you how to use entity framewok4 to create a database step by step. The created

applications from the left menu Enter databasefirstsample as Name Select "OK" 3. Reverse engineer The ModelWe use the Entity Framework designer in Visual Studio to create the model. Project, add New Item ... Select data from the left-hand menu and select the ADO Entity Data Model Enter Bloggingmodel as the name, and then click OK

(varIteminchquery) {Console.WriteLine (item. Name); } Console.WriteLine ("Press any key to exit ..."); Console.readkey (); } } }}Add a service-based database Public bloggingcontext () Base ("name=blogcontext") {} //strings AttachedOr Public bloggingcontext () Base ("blogcontext") {} // strings attachedor wait.App. Config Add content "blogcontext" connectionstring= " Data source= (LocalDB) \v11.

connection string can specify an absolute address, or a relative address. Like my data source=sqlitetest.db, sqlitetest.db to be in the Bin folder, if the Web program can pass data source=| Datadirectory|\sqlitetest.db to configure the App_Data file in flat.2. If you do not specify a table file name in the database, the SQL tables generated by EF are represented in complex numbers. Just like in my program,

should also add the usual features by the way:Type [] On the name, enter display inside, and I'll spell the word, so use her every time.Right-click on display to import the namespace.You can also do this by pressing CTRL + After you have finished entering display. , and then enter, cool or not?To do this:Plus the length (20) is still a bit of use, otherwise if you accidentally entered the 100 characters, not only not necessary, you have to consider the list of problems to display.Iv. Creating a

configuration and is more popular. The configuration for permissionentity is as follows: ? This will be configured to set the name of the table, the maximum length of the field, whether it is nullable, and so on, as the data table is generated. third, build the database Write the configuration for each entity, run the project, and the database will be created

values.This method works well because it is similar to connection conditions. Append the input object to display the attributes marked for update.This method eliminates the risk of retrieving objects and data loss in the database. The second method is the best. It requires someCodeBut it is very effective because it provides the best performance while avoiding data loss. Select the attribute to

Let EF fly for a while: How to Use Entity Framework 6 to connect to the Sqlite database, entitysqliteObtain Sqlite 1. You can use the NuGet package to obtain it. It will also automatically download EF6. 2. Download the corresponding version on the Sqlite Official Website: http://system.data.sqlite.org/index.html/doc/trunk/www/downloads.wiki Note that each. net

like Code First, it is another matter, huh, huh. The constructor signature is as follows: Public SqdlDB (string connectionString): base (connectionString) When the constructor is called to instantiate the database context, the database name will be taken from the definition part of the database name in the connection

Label:First, development background:Since the old system has been unable to meet the actual business requirements, it is necessary to develop new projects even on existing databases.Second, the difficulty point:The EF is not allowed by default when you want to delete an existing database table and recreate it. When you create a database object, you are prompted to "an object named ' XXXXX ' already exists i

; namespace EF43.UpdateSchema {// The created Context must inherit from DbContext public class MyContext: DbContext {// specify the database connection as MyConnection public MyContext () in connectionStrings (): base ("MyConnection") {} public DbSet Demo. aspx. cs /** Download Entity Framework 4.3 through NuGet ** Th

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 me

Programmers are forced to write blog posts every day. It's so hot that I can write a little bit today! 1. EF initializes the database's 4th medium Policy EF can automatically create databases based on models in the project. Next, let's look at the four policies for database initialization in Entity Framework. I. // a new data