Using Microsoft.entity FrameworkCore.Metadata

添加包 EF Core design package NuGet Gallery | Home 使用用于 EF Core 迁移和现有数据库中的反向工程（基架）的工具需要安装相应的工具包： 可在 Visual Studio 包管理器控制台中使用的 PowerShell 工具的 Microsoft.EntityFrameworkCore.Tools 跨平台命令行工具的 dotnet-ef 和 Microsoft.EntityFrameworkCore.Design 请参阅 Entity Framework Core 工具参考，详细了解如何使用 EF Core 工具，包括如何在项目中或在全局范围内正确安装 dotnet-ef 工具。 2.1 数据库上下文类 using System; using Microsoft.EntityFrameworkCore; using Microsoft.EntityFrameworkCore.Metadata; #nullable disable namespace Packt.Shared.AutoGen {//DbContext...

Download EfCoreCleanHelper.zip - 19.8 KB Background Sometimes we may require to delete all the records from the table using Entity Framework Core. One of the commonly used approaches is to iterate each row and use the DBSet<T>.Remove() to delete each row, as shown below. foreach (var item in Db.Users) { Db.Users.Remove(item); } Db.SaveChanges(); This process is slower than Truncate/Delete and not suitable for large datasets.

Download EfCoreCleanHelper.zip - 19.8 KB Background Sometimes we may require to delete all the records from the table using Entity Framework Core. One of the commonly used approaches is to iterate each row and use the DBSet<T>.Remove() to delete each row, as shown below. foreach (var item in Db.Users) { Db.Users.Remove(item); } Db.SaveChanges(); This process is slower than Truncate/Delete and not suitable for large datasets.