entity framework 6 0

the data model, execute the following command in the project folder to add the new migration code: 1: dnx. EF Migration Add Newbook 4. Run the Migration code: 1: dnx. EF migration Apply In more detail, you can "read the original". As far as my own practical experience is concerned, there are a few points to share with you: Now the migration command is not run in the Package Manager console before EF6, but runs under the DNX command. If the DNX command is not valid, then the "

input connections and construct transaction instances. // Or implement the transaction itself, roll back itself, and throw an exception, so that any combined transaction processing between multiple management classes can be realized.Public class entitymgmt { // Entity setPrivate list Private string _ connstring;Public entitymgmt (): This (""){}Public entitymgmt (string conn){_ Entities = new list _ Connstring = conn;If (_ connstring = ""){// Loadfro

How to build an EF environment? (Entity Framework), efentity 1. What is EF? EF is an Entity layer Framework encapsulated by. net for database interaction. Its full name is Entity Framework. 2. EF construction: After the creation

= Hire Date)] public DateTime HireDate { get; set; } public virtual ICollection Courses { get; set; } public virtual OfficeAssignment OfficeAssignment { get; set; } }} Open Student. cs and make the same changes. using System;using System.Collections.Generic;using System.ComponentModel.DataAnnotations;using System.ComponentModel.DataAnnotations.Schema;namespace ContosoUniversity.Models{ public class Student : Person { [DataType(DataType.Date)]

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/download

Manage NuGet packages, add entity Framework for projects Entity that establishes the model corresponding table Create a new DbContext class that inherits the DbContext The DbContext class plus the properties of the table, how many properties are written on the number of tables The type of the property is represented by idbset

ASP. NET MVC5 + EF6 getting started tutorial (5) Model and Entity Framework, mvc5ef6 Source: Slark. NET-blog Park http://www.cnblogs.com/slark/p/mvc-5-ef-6-get-started-model.html Previous section: ASP. net mvc 5 getting started tutorial (4) View and ViewBag Download source code: Click here to download1. Create a Model The Model in MVC is an object used to provide

uses LINQ to SQL to query the table for user information in the username containing the input string. The 8th, 9, and 10 lines are the way LINQ is queried.1 Public voidDisplayuserbyname ()2 {3 stringUserName =string. Empty;4Console.WriteLine ("Input UserName:");5UserName =console.readline ();6Userdal Userdal =NewUserdal ();7ListuserDal.users.ToList ();8 varquery = fromBinchUsers9 whereb.username.contains (UserName)Ten

The Entity framework is a good thing, although not as powerful as hibernate, but easier to use. Today, we'll take a look at how common SQL is expressed in EF, and the Func form and LINQ form are listed (I prefer the Func form).1, simple query:Sql:SELECT * from [clients] WHERE Type=1 and Deleted=0ORDER by IDEf://func FormvarClients = CTX. Clients.where (c = C.type = =1 c.deleted = =

file as an embedded file, this provides better security. In addition, this file and the object class file should be placed under the same directory. Finally, let's look at how to use such entity classes in the project: The object class of the custom query is similar to the ordinary PDF.. Net object classes are used in a similar way. They all require oql expressions for operations. For example, you can select the field to be used and set

form a table to reflect the structure of the object model. Finally, the data is returned to the object service layer. This process is described as follows: After adding the scalar, complex, and reference attributes, the context triggers the objectmaterialized event before processing the set attributes. This event accepts the entity being embodied and allows you to execute some logic before the object is returned to the program. The followingCode

method just created: Using System; using System. collections. generic; using System. linq; using System. text; using ProductEFDemo. business; namespace ProductEFDemo. presenter {public static class UpdateDateView {public static void UpdateProductUnitByUnitName () {try {Console. writeLine ("prepare to update data... "); UpdateData. updateProductUnitByUnitName (); Console. writeLine ("Update successful! ");} Catch (System. exception ex) {Console. writeLine (String. format ("error, error message:

Entity Framework: One-to-multiple relationship When you use Entity Framework to add one-to-multiple relational data, you usually add one data before adding more data. Similar to this: // Add data var category = new Category {Name = "category 1"}; category = context. categories. add (category); // Add multiple data fo

Preface LINQ (Language Integrated Query) is a group of extensions for C # and VB. NET languages. It allows you to write C # Or VB. NETCodeTo operate the memory data in the same way as the query database. 7: LINQ to entities in the series of Entity Framework technology provides a wide range of SQL-like Query syntaxes, which are powerful and easy to use. The summary shows the official implementation set of t

ImprovementEntity model designer, multi-graph modelBatch import Stored Procedure EF 6 Visual Studio 2013 (. NET 4.5) Enhanced Power ToolsEF is released independently from Visual Studio and. NET through nugetYou can configure the number of Retries for an unstable connection.Supports asynchronous Task-based programming mode async query and save in. Net 4.5.Optimized configuration option code-Based ConfigurationSupport dependency injecti

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

J2EE development framework (6) and j2ee development framework There are many orm frameworks, such as guzz, hibernate, and mybaits ...., when encapsulating a framework, we can choose one or more implementations for future use. Here I only implement hibernate, And the directory structure is as follows: 1. first, query t

First look at the Entity model object diagram that was designed in the form of model one:Note: There are navigation properties in Entityone: EntitytwoIn the following code in several cases of new operations, will be error, the new will not succeed: static void Main (string[] args) {Model1container context = new Model1container (); First case: Entityone has the navigation property Entitytwo, the new must also specify the new Entitytwo, otherwise error:

. add (person); con. savechanges ();} var fircontext = new breakawaycontext (); // obtain the first record and modify the socialsecuritynumber field. // do not save var p1 = fircontext. people. firstordefault (); p1.socialsecuritynumber = 123; // create another context, take the first record, // modify the socialsecuritynumber field and save using (VAR seccontext = new breakawaycontext ()) {var P2 = seccontext. people. firstordefault (); p2.socialsecuritynumber = 456; seccontext. savechanges ();

; -Entities. Createobjectset {Wuyi if(p.entitykey.entitykeyvalues[0]. value.tostring () = =Guid) thet =p; - }); Wu returnT; - } About $ /// - ///Delete - /// - /// A /// + Public BOOLDelbyguid (stringGuid) the { -T t =Findbyguid (Guid); $ if(t!=NULL) the entities. DeleteObject (t); the returnSaveChanges () >