本文共 7168 字，大约阅读时间需要 23 分钟。

内置异常页面

public static class Sample02    {
           public static void Run()        {
               Host.CreateDefaultBuilder()                .ConfigureWebHostDefaults(builder => builder                    .ConfigureServices(services => services.AddRouting())                    .Configure(app => app                        .UseDeveloperExceptionPage()                        .UseRouting()                        .UseEndpoints(routeBuilder => routeBuilder.MapGet("/", HandleAsync))                    ))                .Build()                .Run();        }        private static Task HandleAsync(HttpContext context)        {
               return Task.FromException(new InvalidOperationException("This is Exception"));        }    }

自定义异常页面

public static class Sample03{
       public static void Run()    {
           var options = new ExceptionHandlerOptions        {
               ExceptionHandler = context => context.Response.WriteAsync("Hello Exception!")        };        Host.CreateDefaultBuilder()            .ConfigureWebHostDefaults(builder => builder                .Configure(app => app                    .UseExceptionHandler(options)                    .Run(context => Task.FromException(new InvalidOperationException("Throw Exception")))                ))            .Build()            .Run();    }}

public static class Sample04    {
           public static void Run()        {
               Host.CreateDefaultBuilder()                .ConfigureWebHostDefaults(builder => builder                    .Configure(app => app                        .UseExceptionHandler(applicationBuilder => applicationBuilder                            .Run(context => context.Response.WriteAsync("Hello Exception!"))                        )                        .Run(context => Task.FromException(new InvalidOperationException("这是一个异常")))                    ))                .Build()                .Run();        }    }

public static class Sample05    {
           public static void Run()        {
               Host.CreateDefaultBuilder()                .ConfigureWebHostDefaults(builder => builder                    .ConfigureServices(services => services.AddRouting())                    .Configure(app => app                        .UseExceptionHandler("/error")                        .UseRouting()                        .UseEndpoints(routeBuilder => routeBuilder.MapGet("error", HandleAsync))                        .Run(context => Task.FromException(new InvalidOperationException("Throw Exception")))                    ))                .Build()                .Run();        }        private static Task HandleAsync(HttpContext context)        {
               return context.Response.WriteAsync("Hello Exception");        }    }

状态码错误页面

public static class Sample06    {
           public static void Run()        {
               Host.CreateDefaultBuilder()                .ConfigureWebHostDefaults(builder => builder                    .Configure(app => app                        .UseStatusCodePages("text/plain", "Error ({0})")                        .Run(context => Task.Run(() => context.Response.StatusCode = 500))                    ))                .Build()                .Run();        }    }

public static class Sample07    {
           private static readonly Random Random = new Random();        public static void Run()        {
               Host.CreateDefaultBuilder()                .ConfigureWebHostDefaults(builder => builder                    .Configure(app => app                        .UseStatusCodePages(Handler)                        .Run(context => Task.Run(() => context.Response.StatusCode = Random.Next(400,599)))                    ))                .Build()                .Run();        }        private static async Task Handler(StatusCodeContext context)        {
               var response = context.HttpContext.Response;            if (response.StatusCode < 500)            {
                   await response.WriteAsync($"Client Error ({response.StatusCode})");            }            else            {
                   await response.WriteAsync($"Server Error ({response.StatusCode})");            }        }    }

public static class Sample08    {
           private static readonly Random Random = new Random();        public static void Run()        {
               Host.CreateDefaultBuilder()                .ConfigureWebHostDefaults(builder => builder                    .ConfigureServices(collection => collection.AddRouting())                    .Configure(app => app                        .UseStatusCodePagesWithRedirects("/error/{0}")                        .UseRouting()                        .UseEndpoints(routeBuilder => routeBuilder.MapGet("error/{status_code}", HandlerError))                        .Run(context => Task.Run(() => context.Response.StatusCode = Random.Next(400,599)))                    ))                .Build()                .Run();        }        private static async Task HandlerError(HttpContext context)        {
               var code = context.GetRouteData().Values["status_code"];            await context.Response.WriteAsync($"Error ({code})");        }    }

public static class Sample09    {
           private static readonly Random Random = new Random();        public static void Run()        {
               Host.CreateDefaultBuilder()                .ConfigureWebHostDefaults(builder => builder                    .ConfigureServices(collection => collection.AddRouting())                    .Configure(app => app                        .UseStatusCodePagesWithReExecute("/error/{0}")                        .UseRouting()                        .UseEndpoints(routeBuilder => routeBuilder.MapGet("error/{status_code}", HandlerError))                        .Run(context => Task.Run(() => context.Response.StatusCode = Random.Next(400,599)))                    ))                .Build()                .Run();        }        private static async Task HandlerError(HttpContext context)        {
               var code = context.GetRouteData().Values["status_code"];            await context.Response.WriteAsync($"Error ({code})");        }    }

实际中使用异常设置

首先安装如下包

Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation

class Program    {
           static void Main(string[] args)        {
               var options = new DeveloperExceptionPageOptions            {
                   SourceCodeLineCount = 3            };            Host.CreateDefaultBuilder()                .ConfigureWebHostDefaults(builder => builder                    .ConfigureServices(collection => collection                        .AddRouting()                        .AddControllersWithViews()                        .AddRazorRuntimeCompilation())                    .Configure(app=>app                        .UseDeveloperExceptionPage(options)                        .UseRouting()                        .UseEndpoints(routeBuilder => routeBuilder.MapControllers()))                )                .Build()                .Run();        }    }    public class HomeController : Controller    {
           [HttpGet("/")]        public IActionResult Index() => View();    }

转载地址：https://codeboy.blog.csdn.net/article/details/108524619 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！