otNet Core 2.0 推出来也有两,三个月的时间了。现在团队的项目是DotNet Core 1.0版本的,由于2.0并没有向下兼容1.0,所以需要自己手动升级。
首先查看当前的dotnet core的版本,可以通过命令行查看,
$ dotnet -v
也可以通过控制面板的“添加删除程序”查看,这里包含Runtime和SDK两个安装包。在升级到dotnet core 2.0之前,可以选择要不要删除之前安装的老版本的Runtime和SDK,如果不删除的话,系统默认会使用最新的版本。我们这边选择删除以前老的Runtime和SDK
删除完老版本的Dotnet Core后,我们需要去官网下载最新的2.0版本, 并进行安装。
假设之前的1.0项目名字叫做“DemoVersion1”,dotnet core 2.0 提供了很好的CLI命令行,可以帮助我们做迁移,这里要使用的命令行叫
$ dotnet migrate $ dotnet migrate project.json Summary Total Projects: 1 Succeeded Projects: 1 Failed Projects: 0 The project migration has finished. Please visit https://aka.ms/coremigration to report any issues you've encountered or ask for help. Project `Acn.School.csproj` added to the solution. Project reference `Acn.School.xproj` removed. Files backed up to C:\git\DemoVersion1\backup\
在dotnet core的自动迁移之后,我们会发现
- 新增了一个*.csproj文件,这个文件是根据之前的project.json文件生产的,包好了我们项目运行需要的package和运行的环境变量
- 如果有sln文件,文件也会发生变化,变化的主要是GUID值,我们不需要去关心它。
- *.xproj和package.json文件被删除了。
我们主要关系csproj文件,我们会发现TargetFramework还是"netcoreapp1.0", dotnet core包引用的还是"1.0.3"版本,这里需要做一下版本的修改。
<Project Sdk="Microsoft.NET.Sdk.Web"> <PropertyGroup> <TargetFramework>netcoreapp1.0</TargetFramework> <PreserveCompilationContext>true</PreserveCompilationContext> <AssemblyName>Acn.School</AssemblyName> <OutputType>Exe</OutputType> <PackageId>Acn.School</PackageId> <RuntimeFrameworkVersion>1.0.4</RuntimeFrameworkVersion> <PackageTargetFallback>$(PackageTargetFallback);dotnet5.6;portable-net45+win8</PackageTargetFallback> </PropertyGroup> <ItemGroup> <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.0.3" /> <PackageReference Include="Microsoft.AspNetCore.Routing" Version="1.0.3" /> <PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration" Version="1.0.2" /> <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="1.0.3" /> <PrivateAssets>All</PrivateAssets> </PackageReference> <PackageReference Include="MailKit" Version="1.16.1" /> <PackageReference Include="HtmlAgilityPack" Version="1.5.0-beta9" /> <PackageReference Include="Microsoft.Extensions.Caching.Redis.Core" Version="1.0.3" /> </ItemGroup> <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp1.0' "> <PackageReference Include="System.ServiceModel.Duplex" Version="4.0.1" /> <PackageReference Include="System.ServiceModel.Http" Version="4.1.0" /> <PackageReference Include="System.ServiceModel.NetTcp" Version="4.1.0" /> <PackageReference Include="System.ServiceModel.Security" Version="4.0.1" /> <PackageReference Include="System.Xml.XmlSerializer" Version="4.0.11" /> </ItemGroup> </Project>
把
<TargetFramework>netcoreapp1.0</TargetFramework>
换成
<TargetFramework>netcoreapp2.0</TargetFramework>
将下面两行删除
<RuntimeFrameworkVersion>1.0.4</RuntimeFrameworkVersion> <PackageTargetFallback>$(PackageTargetFallback);dotnet5.6;portable-net45+win8</PackageTargetFallback>
将所有的AspNetCore和EF的版本,全部换成2.0.0
<ItemGroup> <PackageReference Include="Microsoft.AspNetCore" Version="2.0.0" /> <PackageReference Include="Microsoft.AspNetCore.Authentication.Cookies" Version="2.0.0" /> <PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="2.0.0" /> <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="2.0.0" /> <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.0.0" /> <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.ViewCompilation" Version="2.0.0" PrivateAssets="All" /> <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="2.0.0" /> <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.0.0" PrivateAssets="All" /> <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.0.0" /> <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.0.0" PrivateAssets="All" /> <PackageReference Include="Microsoft.VisualStudio.Web.BrowserLink" Version="2.0.0" /> <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.0.0" PrivateAssets="All" /> </ItemGroup>
这个时候如果运行项目,会发现很多的依赖包找不到,我们需要先运行一下
$ dotnet restore
如果之前有使用StyleCop.Analyzers做代码的分析检查,那么需要
将project.json文件中的
"buildOptions": { "emitEntryPoint": true, "preserveCompilationContext": true, "define": [], "additionalArguments": [ "/ruleset:RuleSet.ruleset" ] },
修改为,RuleSet.ruleset是自己定制的ruleset文件
<CodeAnalysisRuleSet>RuleSet.ruleset</CodeAnalysisRuleSet>
如果项目中有引用WCF service的话,那么需要在VS 2017里面安装一个拓展:
Microsoft WCF Web Service Reference Provider
官网地址是:https://marketplace.visualstudio.com/items?itemName=WCFCORETEAM.VisualStudioWCFConnectedService
已经开始支持dotnet core 2.0了,但是目前还是有些版本兼容的问题,感兴趣的同学可以关注下这个issue:https://github.com/dotnet/wcf/issues/2340
一个work around的方法是,在Visual Stduio Installer中安装“.NET Core 1.0-1.1 development tools”
最后,如果项目中有用到Microsoft.AspNetCore.Authorization中的JWT,那么代码需要稍微修改一下,可以参考这篇文章。