.Net core 基础 创建及Nlog
2024-10-21 09:32:37
一、.Net Core 依赖注入
.net core3.1 之前的版本需要手动配置swagger。当前项目.net core5.0版本自动配置完成
跨域配置
1.下载依赖包
2.
//跨域
services.AddCors(options =>
{
options.AddDefaultPolicy(c =>
{
//AllowAnyOrigin 来源 AllowAnyMethod 方法 AllowAnyHeader头部信息
c.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader();
}); });
3.使用跨域 在路由之后 授权之前
//路由
app.UseRouting();
//使用跨域!!!!
app.UseCors();
//授权
app.UseAuthorization();
迁移命令:
1.add-migration inir
2.update-database
不使用驼峰命名规范
services.AddControllers().AddJsonOptions(options => options.JsonSerializerOptions.PropertyNamingPolicy = null);
NLog配置
安装nlog包
2、在项目根部创建 nlog.config(全部小写)文件。
3、使用实例
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
internalLogLevel="Info"
internalLogFile="c:\temp\internal-nlog-AspNetCore.txt">
<!-- enable asp.net core layout renderers -->
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
</extensions>
<!-- the targets to write to -->
<targets>
<!-- File Target for all log messages with basic details -->
<target xsi:type="File" name="allfile" fileName="c:\temp\nlog-AspNetCore-all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- File Target for own log messages with extra web details using some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-AspNetCore-own-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|${callsite}| body: ${aspnet-request-posted-body}" />
<!--Console Target for hosting lifetime messages to improve Docker / Visual Studio startup detection -->
<target xsi:type="Console" name="lifetimeConsole" layout="${level:truncate=4:lowercase=true}: ${logger}[0]${newline} ${message}${exception:format=tostring}" />
</targets>
<!-- rules to map from logger name to target -->
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<!--Output hosting lifetime messages to console target for faster startup detection -->
<logger name="Microsoft.Hosting.Lifetime" minlevel="Info" writeTo="lifetimeConsole, ownFile-web" final="true" />
<!--Skip non-critical Microsoft logs and so log only own logs (BlackHole) -->
<logger name="Microsoft.*" maxlevel="Info" final="true" />
<logger name="System.Net.Http.*" maxlevel="Info" final="true" />
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
</rules>
</nlog>4、更新程序.cs 对比原代码粘贴新代码
using NLog.Web;
namespace ASP.NET_Core_5_NLog_Example
{
public class Program
{
public static void Main(string[] args)
{
var logger = NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
})
//!!!!!!复制以下
.ConfigureLogging(logging =>
{
logging.ClearProviders();
logging.SetMinimumLevel(LogLevel.Trace);
})
.UseNLog(); // NLog: Setup NLog for Dependency injection
}
}
5、配置应用程序安装. json
{
"Logging": {
"LogLevel": {
///修改Default 为 Trace
"Default": "Trace",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"AllowedHosts": "*"
}6、 写日志 将 ILogger 注入控制器:
using Microsoft.Extensions.Logging;
public class HomeController : Controller
{
private readonly ILogger<HomeController> _logger;
public HomeController(ILogger<HomeController> logger)
{
_logger = logger;
}
public IActionResult Index()
{
_logger.LogInformation("测试");
return View();
二、EF Core
.net core使用EF core如下
引用依赖包 using Microsoft.EntityFrameworkCore;
当前类继承DBContext 创建上下文
添加上下文
连接数据库
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