3. 插入和查询模型的代码,如Listing 11-6所示的代码:. Listing 11-6.用eSQL 和LINQ两种方式调用(“模型定义”函数)来查询模型 class Program { static void Main(string[] args) { RunExample(); Console.WriteLine("\nPress any key to exit..."); Console.ReadKey(); } static void RunExample() {...
var entity = new MyEntity { Name = "Example" }; inMemoryDb.MyEntities.Add(entity); inMemoryDb.SaveChanges(); 最后,在内存中使用完 DbContext 后,需要手动释放相关资源。 代码语言:txt 复制 inMemoryDb.Dispose(); Entity Framework6 创建内存中的 DbContext 的优势在于可以进行快速的单元测试和集...
在RunForEachAsyncExample()方法中,由于没有与foreach语句相匹配异步方法,我们使用了ForEachAsync()扩展方法。凭借这个异步方法以及 Inclued()方法,我们能够异步查询和枚举这些对象。 在随后的RunToListAsyncExample()和RunSingeOrDefaultAsyncExample()查询中,我们凭借ToList()和SingleOrDefault()方法的新的异步方法来实...
Such entity classes that are decoupled from the persistence framework are also said to be "persistence ignorant". Relationship inverse The opposite end of a relationship, for example, product.Category and category.Product. Self-tracking entity An entity built from a code generation template that ...
Install EntityFramework 6. For example, you can do it with the following command in Package Manager Console: Install-Package EntityFramework -Pre Remove references to old assemblies, specific to Entity Framework v4/v5 from the project: System.Data.Entity.dll ...
If you don't specify a connection string or the name of one explicitly, Entity Framework assumes that the connection string name is the same as the class name. The default connection string name in this example would then beSchoolContext, the...
First, all of the Entity Framework APIs were extracted from the .NET Framework and combined with the out-of-band feature APIs on which the team was also working. Second, the entire development effort moved to an open source model. EF6 has been developed publicly on entityframework.codeplex....
For example, 6.2.0 is the version of number for EF 6.2. EF runtimes before 4.1 were part of .NET Framework and cannot be installed separately. Installing the Latest Preview The above methods will give you the latest fully supported release of Entity Framework. There are often prerelease ...
The final code for this tutorial can be found in GitHub at Visual Studio Tutorial Samples - EF6.Install and connect to NorthwindThis example uses SQL Server Express LocalDB and the Northwind sample database. If the ADO.NET data provider for that product supports Entity Framework...
Example for Using EF6 The following C# code example represents the structure of an Entity Framework 6 model. usingMySql.Data.Entity;usingSystem.Data.Common;usingSystem.Data.Entity;namespaceEF6{// Code-Based Configuration and Dependency resolution[DbConfigurationType(typeof(MySqlEFConfiguration))]public...