1. EF Core 如何显示执行的SQL语句
调试的时候需要查看执行的SQL 语句,我一般是使用 SQL Profiler,当然还有另外一种方式,就是配置EF 日志,这两种方式都比较简单实用,SQL Profiler可以过滤掉很多自己不想看的日志,可以只看某一个IP的日志,而EF Core 的日志则不可以;
SQL Profiler
TODO 我会在这里添加一个附件,以后使用记得修改hostname
EF Core 日志
设置启动方式
在launchSettings.json中删除IIS节点,使程序以控制台应用启动
在Program.cs 配置日志
using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.Hosting; using Microsoft.Extensions.Logging; namespace CompanyApp { public class Program { public static void Main(string[] args) { CreateHostBuilder(args).Build().Run(); } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureLogging((hostingContext, logging) => { logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging")); logging.AddConsole(); logging.AddDebug(); logging.AddEventSourceLogger(); }) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup<Startup>(); }); } }
启用显示敏感数据
默认是只能看到参数,看不到参数的值,在startup.cs 的ConfigureServices 方法中启用显示敏感数据:
public void ConfigureServices(IServiceCollection services) { services.AddControllersWithViews(); services.AddDbContext<CompanyDbContext>(options => { //启用显示敏感数据 options.EnableSensitiveDataLogging(true); options.UseSqlServer(Configuration.GetConnectionString("CompanyDbContext")); }); }
配置 appsettings.json 日志选项
{
"Logging": { "LogLevel": { "Default": "Information", "Microsoft": "Warning", "Microsoft.Hosting.Lifetime": "Information", "Microsoft.EntityFrameworkCore.Database.Command": "Information" } }, "AllowedHosts": "*", "ConnectionStrings": { "CompanyDbContext": "Server=(localdb)\\\\mssqllocaldb;Database=CompanyDb;Trusted_Connection=True;MultipleActiveResultSets=true" } }