.Net Core Web API跨域配置

.Net Core Web API跨域配置
在Startup.cs内
在ConfigureServices方法下：添加配置跨域，自定义名称：CrossDomain

 public void ConfigureServices(IServiceCollection services)
        {
            //services.AddDbContext<CustomerDBContext>(options=>options.UseSqlServer(Configuration.GetConnectionString("SQLConnection")));

            services.AddControllers();

            //配置跨域
            services.AddCors(options =>
            {
                options.AddPolicy("CrossDomain", builder =>
                {
                    builder.AllowAnyOrigin() //允许所有Origin策略

                           //允许所有请求方法：Get,Post,Put,Delete
                           .AllowAnyMethod()

                           //允许所有请求头:application/json
                           .AllowAnyHeader();
                });
            });

        }

注意顺序：
Configure下的app.UseRouting();和 app.UseAuthorization();中间添加app.UseCors(“CrossDomain”);

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseRouting();

            app.UseCors("CrossDomain");//配置跨域

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }