摘要
在学习asp.net core的时候，尝试在控制台，或者页面上输出中文，会出现乱码的问题。
问题重现
新建控制台和站点
public class Program { public static void Main(string[] args) { Console.WriteLine("您好，北京欢迎你"); Console.Read(); } }
站点
public class Startup { // This method gets called by the runtime. Use this method to add services to the container. // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940 public void ConfigureServices(IServiceCollection services) { } // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory) { loggerFactory.AddConsole(); if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } app.Run(async (context) => { await context.Response.WriteAsync("您好，北京欢迎你"); }); } }
那么我们获取“GB2312”编码，然后对其编码呢？
public static void Main(string[] args) { Console.WriteLine("您好，北京欢迎你"); try { Console.WriteLine(Encoding.GetEncoding("GB2312")); } catch (Exception ex) { Console.WriteLine(ex.Message); } Console.Read(); } }
'GB2312' is not a supported encoding name. For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider method.
Parameter name: name
上面的大概意思是Encoding 不支持GB2312编码，需要使用Encoding.RegisterProvider方法进行注册Provider。
try { Encoding.RegisterProvider(CodePagesEncodingProvider.Instance); Console.WriteLine(Encoding.GetEncoding("GB2312")); } catch (Exception ex) { Console.WriteLine(ex.Message); } Console.Read();
CodePagesEncodingProvider在Nuget包System.Text.Encoding.CodePages中
"System.Text.Encoding.CodePages/4.0.1": { "type": "package", "dependencies": { "Microsoft.NETCore.Platforms": "1.0.1", "System.Collections": "4.0.11", "System.Globalization": "4.0.11", "System.IO": "4.1.0", "System.Reflection": "4.1.0", "System.Resources.ResourceManager": "4.0.1", "System.Runtime": "4.1.0", "System.Runtime.Extensions": "4.1.0", "System.Runtime.Handles": "4.0.1", "System.Runtime.InteropServices": "4.1.0", "System.Text.Encoding": "4.0.11", "System.Threading": "4.0.11" }, "compile": { "ref/netstandard1.3/System.Text.Encoding.CodePages.dll": {} }, "runtimeTargets": { "runtimes/unix/lib/netstandard1.3/System.Text.Encoding.CodePages.dll": { "assetType": "runtime", "rid": "unix" }, "runtimes/win/lib/netstandard1.3/System.Text.Encoding.CodePages.dll": { "assetType": "runtime", "rid": "win" } } },
好了，我们修改下代码，先注册，然后输出中文
try { Encoding.RegisterProvider(CodePagesEncodingProvider.Instance); Console.WriteLine(Encoding.GetEncoding("GB2312")); Console.WriteLine("您好，北京欢迎你"); } catch (Exception ex) { Console.WriteLine(ex.Message); }
结语
所以在页面上输出，或者在控制台输出中文的时候，要注意进行注册Provider。
参考
https://msdn.microsoft.com/zh-cn/library/system.text.encoding.registerprovider(v=vs.110).aspx
