entity framework 6 0

Install Entity Framework (EF basics Series 4), entityefEntity Framework 5.0 APIs are distributed in two places: NuGet and. NET Framework, this. NET framework 4.0/4.5 contains the core API of EF, but the EntityFramework obtained through the NuGet package. dll contains special

Entity Framework 4.1 supports code first programming mode: You can create a model class first, and then dynamically generate a database under ef4.1 by configuring. The following shows two scenarios: 1. Asp.net MVC Data Access in code-first Mode 2. In traditional mode, create databases and tables, Configure connection strings, and then generate models. Step 1: (1) Create an ASP. NET mvc3.0 (or 4.0) project

Second level Cache for Entity Framework 6.1Entity Framework does not currently support caching of query results. A Sample EF Caching provider is available for Entity Framework version 5 and earlier but due to changes to the provider mo Del This is a sample provider does not

Original In my February data point column, I showed the jquery datatables plug-in and its ability to seamlessly process massive data on the client. This is ideal for Web applications that require slicing and chunking of large amounts of data. This month, I will focus on using queries that return small loads for different types of interaction with data. This is especially important if you are targeting a mobile application. I will use the features introduced in ASP. NET MVC 3 and demonstrate how

map method, we first select the attributes of the class, and then map the selected Attribute list to a database table. We add a new unit test in our test program to test whether Entity Framework code first persists this class instance to two tables. [TestMethod] public void CanAddNewProductCatalogWithPhoto() { OrderSystemContext unitOfWork = new OrderSystemContext();

Today, when the Entity Framework was inserted into the database, an error occurred: Validation failed for one or more entities. The ' entityvalidationerrors ' property is for more details. I've been using exception ex, this generic exception handling, almost anything wrong. Control entity model and database table also have no problem (EF just started to use, pre

The Entity framework does not throw verbose exceptions by default when validation fails, which makes it difficult for us to debug, but we can manually capture, see Code: private int Update (Employee entity) { string error = String. Empty; using (northwindentities CTX = new NorthwindEntities ()) { try

Entity Framework Codefirst configuration steps, entitycodefirst Steps for configuring Entity Framework Codefirst:(1) Installation command: install-package entityframework(2) create an object class. Pay attention to the usage of virtual keywords in navigation properties.(3) create a DbContext class and create a DbSet fo

execute the T-SQL statement to obtain the entity set Public ienumerable 6. Allow EF to share transactions with ADO. net Public void usesametran () {using (var tran = new transactionscope (transactionscospontion. required) {using (dbentities DB = new dbentities () {using (dB. connection. createconnectionscope () {orders order = dB. orders. firstordefault (O => O. orderid = 10291); Order. freight = 7; dB.

In the previous article, we found that when the Entity Framework builds an SQL statement, the totable ("cnblogstex. DBO. "cnblogstex. DBO. blog_postbody "to" [cnblogstext. DBO]. [blog_postbody] ", resulting in the inability to perform cross-database queries. This morning, we used reflectorCodeAnalysis to find out the truth. The truth is as follows: 1. For the "cnblogstex. DBO. blog_postbody" string,

We have a rough understanding of EF operations, but in practice, it seems that some common functions are still lacking, that is, batch deletion and data update. To undertake the above part, we have a database called House, which contains the House table and seller table. 1. How can I batch Delete and modify native Ef? // Modify public static bool updateallprice (decimal price) {bool isok = false; using (houseentities DB = new houseentities () {var houselist = dB. house. tolist (); // first obtai

Someone may ask why I want to use EF to create a data table that loves you. What are the benefits of code first? When using EF to create a database or table, you only need to design a simple C # class. When the table content changes, it automatically updates the database structure and retains the original data. EF is very powerful. It supports primary and Foreign keys and can generate the same data type as in dB. Since these two tables are simple, I will put the advanced knowledge at the bottom

EF+MVC's website will be slow when it first opens, and it will be slow to restart the application pool if it is idle for a while.program updates, the application pool restarts, and after recycling, the program files need to be reloaded.1, install application initializationThis is IIS8 's built-in feature, and for IIS7.5, Microsoft provides an extension package to support this feature.Application initialization Module for IIS 7.5Http://www.iis.net/downloads/microsoft/application-initializationThi

things appeared.The title just give a great list of what we should learn when do. NET core development.I also understand the difference between angular and the react. Both of them is in great relation with JavaScript. There is an example to discript them, angular is a car, and the react was just an engine. It is just.So my conclusion was that:In normal-just to practice them:ASP. NET core, MVC, Entity Framework