首先仔细阅读官方给出的升级文档这是地址
简介 - Training | Microsoft Learn
跟据文档中的操作升级
升级之后可能会有大量报错，将报错都改好，运行
如果能正常运行起来那么恭喜你，一般是会有问题
我遇到的问题是项目启动不了，各种报错，改好错误之后能顺利生成了，看一下你的vs2022 是不是最新，更新到最新。
然后我贴出Program.cs 文件，供大家参考
using Microsoft.EntityFrameworkCore;
using XinHua2021.Models;
using YuanFuTouBao2022Core.Dao;var builder = WebApplication.CreateBuilder(args);// Add services to the container.
builder.Services.AddControllersWithViews();
builder.Services.AddControllersWithViews().AddRazorRuntimeCompilation();
//注入Session
builder.Services.AddSession();var app = builder.Build();// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{app.UseExceptionHandler("/Home/Error");// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.app.UseHsts();
}app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseSession();
app.UseRouting();
app.UseAuthorization();app.MapControllerRoute(name: "default",pattern: "{controller=Login}/{action=Index}/{id?}");app.Run();
直接启动运行，这时候项目就能启动了，再改一下js引用css引用，改一下数据库链接这里放出sqlserver 和 mysql 两种方式的数据库链接
首先要引入包
项目应该有这些包
sqlserver：
namespace XinHua2021.Models
{using Microsoft.EntityFrameworkCore;using NPOI.SS.Formula.Functions;using DbContext = Microsoft.EntityFrameworkCore.DbContext;public partial class mssql0081881Entities : DbContext{protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder){string connString = @"Data Source=.;Initial Catalog=aa;Persist Security Info=True;User ID=a;Password=a;MultipleActiveResultSets=true;Encrypt=True;TrustServerCertificate=True;";//数据库连接字符串optionsBuilder.UseSqlServer(connString);}public virtual DbSet<YFTB_CfmMessages> YFTB_CfmMessages { get; set; }public virtual DbSet<YFTB_Config> YFTB_Config { get; set; }}
}mysql :建一个类
using Microsoft.EntityFrameworkCore;
using System.Data.Entity;
using DbContext = Microsoft.EntityFrameworkCore.DbContext;namespace YuanFuTouBao2022Core.Dao
{public class SqlContext : DbContext{protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder){base.OnConfiguring(optionsBuilder);string connectStr = "server=.;port=3306;database=a;uid=a;pwd=a;CharSet=utf8";//注意了，下面的那么Version是mysql的版本号，8.0.3是我的版本号，你可以通过在cmd中输入//mysql --help查看自己的版本号optionsBuilder.UseMySql(connectStr, new MySqlServerVersion(new Version(8, 0, 29)));}protected override void OnModelCreating(ModelBuilder modelBuilder){base.OnModelCreating(modelBuilder);modelBuilder.ApplyConfigurationsFromAssembly(this.GetType().Assembly);}public Microsoft.EntityFrameworkCore.DbSet<YFTB_LoginUser> YFTB_LoginUser { get; set; }}
}
基础类建好，分别把实体类在补充上 数据库这块就搞定了
在controller中就可以使用了
public class LoginController : Controller
{mssql0081881Entities db = new mssql0081881Entities();// GET: LoginSqlContext sqlContext = new SqlContext();public IActionResult Index(){var a = sqlContext.YFTB_LoginUser.ToList();return View();}}再去修改 项目中controller和views具体的写法就好了。
