ASP.NET Core RC2 终于发布了( Announcing ASP.NET Core RC2 )。为了庆祝这次发布,我们将运行在 Ubuntu 服务器上的示例站点 about.cnblogs.com 升级到了 ASP.NET Core RC2 ,在这篇博文中分享一下我们在升级过程中遇到的问题。
一、安装.NET Core SDK
删除旧版 dotnet cli:
rm -rf /usr/share/dotnet
安装 .NET Core SDK:
curl -sSL https://raw.githubusercontent.com/dotnet/cli/rel/1.0.0/scripts/obtain/dotnet-install.sh | bash /dev/stdin --version 1.0.0-preview1-002702 --install-dir ~/dotnet
sudo ln -s ~/dotnet/dotnet /usr/local/bin
二、运行 dotnet restore 命令
遇到2个错误:
1) Unable to resolve 'Microsoft.AspNetCore.IISPlatformHandler (>= 1.0.0)' for '.NETCoreApp,Version=v1.0'
解决方法:在 project.json 中将 Microsoft.AspNetCore.IISPlatformHandler 改为 Microsoft.AspNetCore.Server.IISIntegration 。
2) Package Newtonsoft.Json 7.0.1 is not compatible with netcoreapp1.0 (.NETCoreApp,Version=v1.0)
解决方法:在 project.json 中将
"tools": {
"Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-*"
}
改为
"tools": {
"Microsoft.AspNetCore.Server.IISIntegration.Tools":{
"version":"1.0.0-*",
"imports": "portable-net45+win8+dnxcore50"
}
}
详见博问:http://q.cnblogs.com/q/82384/
三、运行 dotnet run 命令
遇到了不少错误:
1)
The type or namespace name 'IApplicationEnvironment' could not be found (are you missing a using directive or an assembly reference?)
解决方法:将 Startup.cs 中的 IApplicationEnvironment 改为 IHostingEnvironment,详见 http://q.cnblogs.com/q/82388/ 。
2)
'IWebHostBuilder' does not contain a definition for 'UseDefaultHostingConfiguration' and no extension method 'UseDefaultHostingConfiguration' accepting a first argument of type 'IWebHostBuilder' could be found (are you missing a using directive or an assembly reference?)
解决方法:在 Program.cs 中删除 .UseDefaultHostingConfiguration(args)
3)
'IWebHostBuilder' does not contain a definition for 'UseIISPlatformHandlerUrl' and no extension method 'UseIISPlatformHandlerUrl' accepting a first argument of type 'IWebHostBuilder' could be found
解决方法:在 Program.cs 中将 .UseIISPlatformHandlerUrl() 改为 UseIISIntegration()
4)
'ConfigurationBuilder' does not contain a definition for 'SetBasePath' and no extension method 'SetBasePath' accepting a first argument of type 'ConfigurationBuilder' could be found
解决方法:在 project.json 的 dependencies 中添加配置: "Microsoft.Extensions.Configuration.FileExtensions": "1.0.0-*" ,详见 http://q.cnblogs.com/q/82391/
5)
'IConfigurationBuilder' does not contain a definition for 'AddJsonFile' and no extension method 'AddJsonFile' accepting a first argument of type 'IConfigurationBuilder' could be found
解决方法:在 project.json 的 dependencies 中添加配置: "Microsoft.Extensions.Configuration.Json": "1.0.0-*" ,详见 http://q.cnblogs.com/q/82395/
6)
The type or namespace name 'IRuntimeEnvironment' does not exist in the namespace 'Microsoft.Extensions.PlatformAbstractions'
解决方法:在 _Layout.cshtml 中删除 @inject Microsoft.Extensions.PlatformAbstractions.IRuntimeEnvironment env ,添加命名空间 @using Microsoft.Extensions.PlatformAbstractions 与代码 @{ var env = PlatformServices.Default.Runtime; } 。
四、代码改进
在 Program.cs 中将 .UseServer("Microsoft.AspNetCore.Server.Kestrel") 改为 .UseKestrel() 。
五、project.json、Program.cs、Startup.cs中的完整代码
1)project.json
{
"compilationOptions": {
"preserveCompilationContext": true,
"emitEntryPoint": true
},
"dependencies": {
"Microsoft.Extensions.Logging.Console": "1.0.0-*",
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-*",
"Microsoft.AspNetCore.HttpOverrides": "1.0.0-*",
"Microsoft.AspNetCore.Mvc": "1.0.0-*",
"Microsoft.AspNetCore.StaticFiles": "1.0.0-*",
"Microsoft.AspNetCore.Diagnostics": "1.0.0-*",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.0-*",
"Microsoft.EntityFrameworkCore.SqlServer": "1.0.0-*",
"Microsoft.Extensions.Configuration.FileExtensions": "1.0.0-*",
"Microsoft.Extensions.Configuration.Json": "1.0.0-*",
"Microsoft.NETCore.App": {
"type": "platform",
"version": "1.0.0-*"
}
},
"frameworks": {
"netcoreapp1.0": {
"imports": [
"portable-net45+wp80+win8+wpa81+dnxcore50",
"portable-net45+win8+wp8+wpa81",
"portable-net45+win8+wp8"
]
}
}, "tools": {
"Microsoft.AspNetCore.Server.IISIntegration.Tools":{
"version": "1.0.0-*",
"imports": "portable-net45+win8+dnxcore50"
}
}
}
2)Program.cs
using System.IO;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Builder; namespace CNBlogs.AboutUs.Web
{
public class Program
{
public static void Main(string[] args)
{
var host = new WebHostBuilder()
.UseKestrel()
.UseUrls("http://*:8001")
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>()
.Build(); host.Run();
}
}
}
3)Startup.cs
using System;
using System.IO;
using System.Linq;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.EntityFrameworkCore;
using CNBlogs.AboutUs.Data;
using Microsoft.Extensions.PlatformAbstractions;
using Microsoft.Extensions.Configuration;
using System.Data.SqlClient;
using Microsoft.Extensions.Logging;
using CNBlogs.AboutUs.Application;
using Microsoft.AspNetCore.Hosting; namespace CNBlogs.AboutUs.Web
{
public class Startup
{
public Startup(IHostingEnvironment hostingEnv)
{
IConfigurationBuilder builder = new ConfigurationBuilder()
.SetBasePath(hostingEnv.ContentRootPath)
.AddJsonFile("config.json", false);
Configuration = builder.Build();
} public IConfiguration Configuration { get; set; } public void Configure(IApplicationBuilder app,
ILoggerFactory loggerFactory,
IHostingEnvironment env)
{
if(env.IsDevelopment())
{
loggerFactory.AddConsole(LogLevel.Debug);
}
else
{
loggerFactory.AddConsole(LogLevel.Error);
} app.UseDeveloperExceptionPage();
app.UseMvcWithDefaultRoute();
app.UseStaticFiles();
app.UseRuntimeInfoPage(); if(env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
} public void ConfigureServices(IServiceCollection services)
{
services.AddMvc(); services.AddEntityFrameworkSqlServer()
.AddDbContext<EfDbContext>(options =>
{
options.UseSqlServer(Configuration["data:ConnectionString"]);
}); services.AddTransient<ITabNavRepository, TabNavRepository>();
services.AddTransient<ITabNavService, TabNavService>();
}
}
}