.Net Framework 4.5.1 Entity Framework 6.2.0 You get this error when using System.Data.Spatial features in .Net (for example: DbGeography Class or DbGeometry Class): Spatial types and functions are not available
Find/FindAsync:按主键获取一个实体,首先在EF Context中查找是否有被缓存过的实体,如果查找不到再去数据库查找,如果数据库中存在则缓存到EF Context并返回,否则返回null。 Attach:将一个已存在于数据库中的对象添加到EF Context中,实体状态被标记为Unchanged。对于已有相同key的对象存在于EF Context的情况,如果这个已...
Entity Framework Core 9.0 CosmosPropertyExtensions CosmosQueryableExtensions DataCompressionType DbContext DbContext 构造函数 属性 方法 Add AddAsync AddRange AddRangeAsync Attach AttachRange ConfigureConventions Dispose DisposeAsync Entry Find FindAsync
下面的代码展示了如何在EntityFramework-Core中使用断点进行调试: public async Task<IActionResult> GetProduct(int id) { var product = await _context.Products.FindAsync(id); // 设置断点在此行,检查product对象的状态 if (product == null) { return NotFound(); } return Ok(product); } 使用EF Cor...
check System.Data.Entity.QueryableExtensions. DbSet gained FindAsync and DbContext gained SaveChangesAsync. Since that article, not much has changed, so you can take a look at it to get more details. In addition, Microsoft created some walk-throughs and an interesting detailed specification, whic...
EF Core 6.0 Release Candidate 1 was released to NuGet a few weeks ago. This release is the first of two “go live” release candidates that are supported in production. EF Core 6.0 RC1 runs on Release Candidate 1 for .NET 6.0, which also has a “go live” license. ...
For example, if you are using the Microsoft Entity Framework to access your database, then you would create your Entity Framework classes (your .edmx file) in the Models folder. A view should contain only logic related to generating the user interface. A controller should only contain the ...
Entity Framework 6.2.0 ProductVersions Entity Framework6.2.0 FindAsync(CancellationToken, Object[]) Asynchronously finds an entity with the given primary key values. If an entity with the given primary key values exists in the context, then it is returned immediately without making a request to the...
For example, the BuyerRepository repository implements a FindAsync method, because the application needs to know whether a particular buyer exists before creating a new buyer related to the order.However, the real query methods to get data to send ...
For example, to add the SQL Server provider to your project, you can use the following command using the dotnet tool: Copy dotnet add package Microsoft.EntityFrameworkCore.SqlServer --version 7.0.0-preview.7.22376.2 This following table links to the preview 7 versions of the EF Core packages...