edmx file entity framework

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 code generated by EF, as in the following code:Db. Basedept.remove (basedept), DB. Basedept break point, the query to the SELECT statement, remove,

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

" Microsoft.EntityFrameworkCore.Sqlite After execution, the corresponding entity classes and corresponding context are generated in the project directory. Project useFirst we'll add the following code to the Startup.cs Configureservices method: public void Configureservices (iservicecollection services) { var connection = filename= Efcoredemo.db services. Adddbcontext options. Usesqlite (connectio

Entity Framework Power Tools is a tool that is provided by the EntityFramework development team to generate a fluent version of code first from an existing database.VS Gallery Home: https://visualstudiogallery.msdn.microsoft.com/72a60b14-1581-4b9b-89f2-846072eff19dToday, WIN10 by the newly installed vs also replaced by 2015, and then happily expand the inside all this tool, incredibly search?! Hurry up on t

Entity Framework 4.1/4.3 (DBContext 3 state tracking) 　　Let's talk about DBContext. This time the content will be consistent with the content mentioned in DBContext 2. 2. add, delete, and modify objects in DBContext (Adding, Changing, and Deleting Entities) In DBContext 2, we talked about "add, delete, and modify", in which we already talked about "add, delete, and modify ". Some of the content is not men

{Get; set ;} Public Virtual list } Public class post { Public int postid {Get; set ;} Public String title {Get; set ;} Public String content {Get; set ;} Public int blogid {Get; set ;} Public Virtual blog {Get; set ;} } Public class bloggingcontext: dbcontext { Public bloggingcontext (): Base ("blogcontext "){} Public dbset Public dbset } } This is the configuration file Providername = "system. Data. sqlclient" Connectionstring = "Server =.

Prompt for generating Entity Framework code first in EF Power Tools Beta 2 Parameter Error hresult e_invalidargThe latest Solution Environment: vs2012 update 1 + EF5 Solution: I have found a lot online and cannot solve this problem. The following method can be used to solve this problem! Installation directory in vs2012 D: \ Program Files \ vs2012 \ common7 \ ide \ extensions \ Microsoft \

These days in the study of how to use the entity Framework to access the database, which also took a lot of detours, fortunately finally set up the environment success, the following detailed description of the environment under construction steps1. Download and install SQLite Data ProviderTo official website: http://system.data.sqlite.org/index.html/doc/trunk/www/ Downloads.wiki Download Version Sqlite-net

Label:Today, trying to learn the problem with entity Frame work is The Entity Framework provider type ' System.Data.Entity.SqlServer.SqlProviderServices, Entityframework.sqlserver ' Registered in the application config file for the ADO provider with invariant name ' System.Data.SqlClient ' could not B E loaded. Make su

Entity Framework Code First migration command, codefirst I. Enable-Migrations 　　Note:Enable migration for the project. This command adds the Migrations folder for the project, including two files: Configuration class: This class allows context-based Configuration migration. InitialCreate migration: this migration is generated before migration is enabled. If the database is not generated before Migration is

tables. Because we designed two exercises for ourselves .) So far, I found that we have not named our project. What's better? Let's call it reportingsyncer. Reporting (report), sync (synchronization), why add er? Currently, Project names are often anthropomorphic, Which is vivid and powerful. [Start] Open vs 2010 and create a new class library named reportingdbmanager. Delete automatically generated class1.cs. Modify the SLN (solution name: reportingsyncer ). Modify the namespace: Right-click r

primary key/foreign key cannot be set in the Model Sometimes, the foreign key is not clearly defined in the model of the master-slave relationship; sometimes the primary key of the model is private set; In this case, we cannot set the primary key/foreign key value in hasdata. How can we add the seed data? The answer is to useAnonymous class. I removed the foreign key from the city model (the navigation property is retained, and the master-slave relationship with province still exists ): Then

(): Base ("Name=unicornscedatabase"){}} 4. Database/model connection characters in the config file for first use Connectionstring= "metadata=res://*/northwind.csdl|res://*/northwind.ssdl|RES://*/NORTHWIND.MSL;Provider=system.data.sqlclient;Provider Connection string=quot;data source=.\sqlexpress;Initial Catalog=northwind;Integrated security=true;multipleactiveresultsets=truequot; "Providername= "System.Data.EntityClient"/> public class Northwindco

Recently, we have developed a small application that uses SQLite as a database. When we started using dblinq, there was an unsupported problem when we made a LINQ query. Later I saw that Entity Framework (EDM) supports SQLite, so it was converted quickly. Complete development and test on the development machine. Deploy it to the official environment and start to see "The specified storage zone providesProgr

Tags: home register. NET post VID profile strong load NameAn exception occurred today when we were doing the EF ORM Framework:"The Entity Framework provider type registered in the application configuration file could not be loaded for an ADO provider with a fixed name of" System.Data.SqlClient " System.Data.Entity.SqlS

Entity Framework 6 Recipes 2nd Edition (10-10), entityrecipes 10-10. The insert, update, and delete operations inherited by TPH are mapped to the stored procedure. Problem TPH inherits the model and maps its insert, modify, and delete operations to the stored procedure. Solution Assume that the database has a Product table describing different types (see Figure 10-13 ). A derived model is created for each p

Entity Framework 6 Recipes 2nd Edition (10-4), entityrecipes 10-4. Return a complex type from the Stored Procedure Problem To use a stored procedure that returns a complex type in a method Solution Suppose we already have Figure 10-3. the model shown in. The Employee model contains the Employee ID, Name, and a complex Address attribute. The Address contains the Employee Address information, which includes t

no key is defined.Posts:EntityType:EntitySet "Posts" is based on type "Post" with no key defined.This is because there is no primary key defined, in simple terms is the legendary ID ... Adding a primary key to an entity class/// /// PRIMARY Key /// Public string Get set; }The string type of the primary key, or is relatively rare.One more time, enter: Enable-migrations-contexttypename ShowPin.Web.Models.ObjectContext again "en

out in memory immediately thereafter.If you want your code to generate LINQ to SQL as much as possible, it's a simple rule to use LINQ, lambda expressions as much as possible so that EF can help us translate. There are two kinds of count in C #. Enumerable.count () is a method, List.count is a property. Once a thing becomes a list, you go to count, it must be in memory.So, in EF, to do count, this should be the case:Context. Post.count (p = p.categories.any (q = q.name = = CategoryName));At thi

Entity Framework exception: the specified metadata resource cannot be loaded. Unable to load the specified metadata Resource When referencing an EF project in an ASP. NET project, you must modify web. config and add the EF connection string to Web. config. Change the metadata of the connection string to the following format: Metadata = Res: // entitymodel/mgrsysentities. CSDL | res: // entitymodel/m