首先,Scaffold-Dbcontext是一个Package Management Console命令(针对Visual Studio用户,非Visual Studio用户可以参考.NET Core CLI指令https://docs.efproject.net/en/latest/cli/dotnet.html),可以使用-Verbose来使其dump具体的错误信息; 其次,最新的Entity Framework 1.0 RC2依赖于Powershell 5.0,所以会导致许多问题。...
跟Entity Framework之前的版本不同,Class DbContext不再有AcceptAllChanges()方法。 使用Transaction需要使用DbContext中的Database对象。 using(vartransaction =await_dbContext.Database.BeginTransactionAsync()) {try{ ... Operation onobject_dbContext.TableA.Add(rowa);//Add rowa to Table A_dbContext.SaveCha...
using Microsoft.EntityFrameworkCore; using Microsoft.EntityFrameworkCore.Infrastructure; using Microsoft.EntityFrameworkCore.Storage; using System; using System.Collections.Generic; using System.Data; using System.Data.Common; using System.Linq; using System.Reflection; namespace EfCoreHelper.Database.Core ...
Jeremy Likness shows Scott Hanselman how to use Entity Framework (EF) Core with Azure SQL DB and Azure Cosmos DB. EF Core is a lightweight, extensible, open source, and cross-platform version of the popular Entity Framework data access tec
Resilient Entity Framework Core Sql Connections In regards the Azure SQL DB case, Entity Framework Core already provides internal database connection resiliency and retry logic, but you need to enable your desired execution strategy per DbContext connection if you want...
Fix the error with adding the Entity Framework assembly and connection string into the Unit Test Project. Well, we can manual create an app.config file but that is not going to be easy. The easy way is add the Entity Data Model follow the step 4 through step 20 in ...
using System.Data; using System.Data.Common; using System.Data.Entity; public static class DbContextExtensions { /* * need Only EntityFramework */ public static DataTable DataTable(this DbContext context, string sqlQuery, params DbParameter[] parameters) { DataTable dataTable = new DataTable(...
直接定位transaction时会定位到EFCore中,这个里面我并没有找到对应的显式Rollback操作,但是经过网络上查询,找到了一个源码中实现了自动 Rollback 在System.Data.SqlClient中的SqlInternalTransaction中反编译后,会发现下面的代码 代码语言:javascript 代码运行次数:0 ...
是一种在.NET开发中管理数据库连接和资源释放的方法。在使用Entity Framework进行数据库操作时,我们可以通过using语句来获取dbcontext连接对象,以确保在使用完毕后及时释放资源...
Entity Framework does a great job at simplifying the way we interact with storage. Sometimes we need to use parallelism to speed up the completion of a task. This is usually done by means of multithreading (note: always prefer to use a new context per request, instead of a context pe...