programming entity framework code first

posted, the implementation of Sqlite.codefirst itself is relatively simple, I added the code is relatively simple, so there is no reference value in code, only the use and practical value. After all, the support for these features is only required for debug development and has no effect on SQLite itself and the EF provider. It's finally a relief, we can now use: SQL Server (CE), SQLite and MySQL for

together. To access the Fluent API, you need to override the Onmodelcreating method in DbContext. Suppose we need to rename the column that User.displayname stores to display_name. Use the following code to override the Onmodelcreating method of Bloggingcontext Public classBloggingcontext:dbcontext { PublicDbsetGet;Set; } PublicDbsetGet;Set; } PublicDbsetGet;Set; } protected Override voidonmodelcreating (Dbmodelbuilder modelBuilder) {modelbui

Tags: Post enter menu data form data delete IMA ever arc1. Create an Existing Database CREATE TABLE [dbo].[Blogs] ( [BlogId] INT IDENTITY(1,1) not NULL, [Name] NVARCHAR( $)NULL, [URL] NVARCHAR( $)NULL, CONSTRAINT [pk_dbo. Blogs] PRIMARY KEY CLUSTERED([BlogId] ASC) ); CREATE TABLE [dbo].[Posts] ( [PostID] INT IDENTITY(1,1) not NULL, [Title] NVARCHAR( $)NULL, [Content] NTEXT NULL, [BlogId] INT not NULL, CONSTRAINT [pk_dbo. Posts] PRIMARY KEY CLUSTERE

= "Sales Manager"};var C4 = new Customer {Name = "Julie Stevens", company = "Goshopnow.com",ContactTitle = "Sales Manager"};Context. Customers.add (C1);Context. Customers.add (C2);Context. Customers.add (C3);Context. Customers.add (C4);Context. SaveChanges ();}using (var context = new Ef6recipescontext ()){var allcustomers = context. GetCustomers ("goshopnow.com", "Sales Manager");Console.WriteLine ("Customers that is Sales Managers at goshopnow.com");foreach (var c in allcustomers){Console.Wri

Date {Get;Set; } Public stringThread {Get;Set; } Public stringLevel {Get;Set; } Public stringLogger {Get;Set; } Public stringMessage {Get;Set; } }}3.model finished, then the most important thing is to have a dbcontext, create a new directory Dal, add a class inheriting DbContext ApplicationDbContext.csusingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingsystem.web;usingTLT. Models;usingSystem.Data.Entity;namespaceTLT. dal{ Public classApplicationdbcontext:dbcontext { PublicAppl

5. Filter overrides You can get Themore details from Microsoft msdnhttp://www.asp.net/visual-studio/ OVERVIEW/2013/RELEASE-NOTES#TOC10 Layout support: Supports only Master Page in MVC2. Supports notonlymaster page but also Layout page in MVC 3 and MVC4. Validation: Client-side Validation and asynchronous controllers are there in MVC2. Unobtrusive Ajax and Client side Validation, Jquery Validation and JSON binding support are in MVC3. Client side validation, Jquery validation an

Label:Visual Studio Entity Framework (EF) generates SQL code performance queriesIn SQL, there areSQL Server Profiler can be used to query performance and view SQL code for external calls. However, after EF connects to MySQL, some of the code cannot query the SQL

place here.　　Found the portal to generate the migration file, let's find out how to update these changes to the database through code.When using EF Core, we have to write our own DbContext subclasses by inheriting DbContext. In the DbContext class we found a Database property. As shown in the following:　　Then we looked at the Databasefacde class and did not find any functions to perform the migration. With code search, I have a migration () extension

1. Entity Framework Code First query table or view var provincelist = ctx. Provinces.sqlquery ( " select TOP * from province " foreach (var province in Provincelist) {Console.WriteLine ( " {0}-{1}-{2} " var provincelist = ctx. Database.sqlquery"select TOP Ten provinceno,provincename from province" ); foreach (var in provincelist) {

Tags: mysql ros RAM encoding div img Local--paramFor an introduction to how to use the EF Power tool, see http://www.cnblogs.com/LingzhiSun/archive/2011/05/24/EFPowerTool_1.html, which is no longer verbose. MySQL has a default sample database in the world, with three tables in it, Download the entity Framework Power Tools installation package, which is now the BETA3 version, http://visualstudiogallery.msdn

Label:This blog will show you how to use the SQL Compact in EF Code first. The SQL Compact is a free relational database launched by Microsoft, and the latest version is the SQL Compact 4.0. Microsoft's development tools vs 2010/sql Server 2008 and subsequent versions do not have SQL Compac 3.5/4.0t database viewing tools. But there's a sqlcetoolbox tool on CodePlex that's pretty good. Kind of like a lite version of SQL Server Management Studio. The S

In the previous section, we explained a simple entity framework application. In this section, we will use the Data annotation and Fluent APIs to configure the object model. Here we mainly explain how to configure through Fluent API, compared with Data Annotation, I prefer this kind of clean code and the entity

Getting Started with Entity Framework 6 Code First using MVC 5 --- use MVC5 to learn EF6 CodeFirst series, mvc5ef6 Preface I am still not used to reading English video materials. I will read this English article and try to sum up this series. The following is the directory: 1. Create an EF entity