ASP.NET Core(兼容2.0&3.0)WebAPI 开启静态网页,设置主页,跨域,Json保持原始大小写,添加MIME

开启静态网页

Startup.Configure:

app.UseStaticFiles();

设置主页

Startup.Configure:

DefaultFilesOptions defaultFilesOptions = new DefaultFilesOptions(); defaultFilesOptions.DefaultFileNames.Clear(); defaultFilesOptions.DefaultFileNames.Add("index.html"); app.UseDefaultFiles(defaultFilesOptions);

重要提示，代码是有顺序的：

UseDefaultFiles-UseStaticFiles-UseMvc

汇总：

Startup.Configure:

DefaultFilesOptions defaultFilesOptions = new DefaultFilesOptions(); defaultFilesOptions.DefaultFileNames.Clear(); defaultFilesOptions.DefaultFileNames.Add("index.html"); app.UseDefaultFiles(defaultFilesOptions); app.UseStaticFiles(); app.UseMvc();

跨域

Startup.Configure:(core 3.0 ConfigureServices中需包含services.AddControllers();)

app.UseCors(corsPolicyBuilder => corsPolicyBuilder.AllowAnyMethod().AllowAnyOrigin());

Json保持原始大小写

Startup.ConfigureServices:

2.0:

<PackageReference Include="Newtonsoft.Json" Version="12.0.2" />

services.AddMvc().AddJsonOptions(options => options.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.DefaultContractResolver());

3.0 方案1修改原生方法:

services.AddControllers().AddJsonOptions(options => { options.JsonSerializerOptions.DictionaryKeyPolicy = null; options.JsonSerializerOptions.PropertyNamingPolicy = null; });

3.0 方案2用NewtonsoftJson替换原生方法:

<PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.0.0" />

services.AddControllers() //原生Json服务中文、变量、注释支持差，这里切换为Newtonsoft提供的Json服务，必须引用Microsoft.AspNetCore.Mvc.NewtonsoftJson，引用Newtonsoft.Json此处无效 .AddNewtonsoftJson(options => { //保持Json属性/变量大小写 options.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.DefaultContractResolver(); // 忽略循环引用 options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore; // 设置时间格式 options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss"; // 如字段为null值，该字段不会返回到前端 // options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore; });

添加MIME

Startup.Configure:

var provider = new FileExtensionContentTypeProvider(); provider.Mappings[".osm"] = "application/octet-stream"; app.UseStaticFiles(new StaticFileOptions() { ContentTypeProvider = provider });