前言
相信大家應(yīng)該都知道.NET Core現(xiàn)在不再支持原來(lái)的web.config配置文件了，取而代之的是json或xml配置文件。官方推薦的項(xiàng)目配置方式是使用appsettings.json配置文件，這對(duì)現(xiàn)有一些重度使用web.cofig配置的項(xiàng)目遷移可能是不可接受的。
但是好消息是，我們是可以直接在.NET Core 2.0項(xiàng)目種利用上現(xiàn)有的web.config的。本文將詳細(xì)介紹.NET Core 2.0遷移之web.config 配置文件的相關(guān)內(nèi)容，下面話不多說了，來(lái)一起看看詳細(xì)的介紹吧。
遷移方法
1.首先在解決方案中引入System.Configuration.ConfigurationManager,只有引入它才可以讓我們已有的讀取web.config代碼起作用.
2. 導(dǎo)入web.config文件到項(xiàng)目根目錄，并將名稱修改為app.config. 因?yàn)?NET Core的項(xiàng)目本質(zhì)是控制臺(tái)應(yīng)用，所以ConfigurationManager的API會(huì)去默認(rèn)讀取app.config配置文件，而不是web.config配置文件。
3.去除config中和需要的配置無(wú)關(guān)的內(nèi)容，主要是<system.web> , <system.webServer>和<system.codedom>等典型asp.net標(biāo)簽。
移除前：
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<?xml version="1.0" encoding="utf-8"?><configuration> <configSections> <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --> <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /> </configSections> <connectionStrings> <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\aspnet-WebApplication24-20170824065102.mdf;Initial Catalog=aspnet-WebApplication24-20170824065102;Integrated Security=True" providerName="System.Data.SqlClient" /> </connectionStrings> <appSettings> <add key="webpages:Version" value="3.0.0.0" /> <add key="webpages:Enabled" value="false" /> <add key="ClientValidationEnabled" value="true" /> <add key="UnobtrusiveJavaScriptEnabled" value="true" /> <add key="MyKey" value="true"/> </appSettings> <system.web> <compilation debug="true" targetFramework="4.7" /> <httpRuntime targetFramework="4.7" /> <httpModules> <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" /> </httpModules> </system.web> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" /> <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="0.0.0.0-1.5.2.14234" newVersion="1.5.2.14234" /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0" /> </dependentAssembly> </assemblyBinding> </runtime> <system.webServer> <validation validateIntegratedModeConfiguration="false" /> <modules> <remove name="ApplicationInsightsWebTracking" /> <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" preCondition="managedHandler" /> </modules> </system.webServer> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:1659;1699;1701" /> <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:41008 /define:_MYTYPE=\"Web\" /optionInfer+" /> </compilers> </system.codedom></configuration> |
修改后：
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<?xml version="1.0" encoding="utf-8"?><configuration> <configSections> <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --> <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /> </configSections> <connectionStrings> <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\aspnet-WebApplication24-20170824065102.mdf;Initial Catalog=aspnet-WebApplication24-20170824065102;Integrated Security=True" providerName="System.Data.SqlClient" /> </connectionStrings> <appSettings> <add key="webpages:Version" value="3.0.0.0" /> <add key="webpages:Enabled" value="false" /> <add key="ClientValidationEnabled" value="true" /> <add key="UnobtrusiveJavaScriptEnabled" value="true" /> <add key="MyKey" value="true"/> </appSettings></configuration> |
4.測(cè)試原ASP.NET代碼，查看讀取配置值
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using System.Configuration;namespace WebConfigTest.Configuration{ public class ConfigurationService { public static bool GetConfigValue(string key) { var result = false; var val= ConfigurationManager.AppSettings[key]; if (val != null) { result = bool.Parse(val); } return result; } }} |
打個(gè)斷點(diǎn)，看下讀取配置值是否正確：
大功告成，讀取的配置值完全正確。
大家可以使用這個(gè)方法快速遷移現(xiàn)有配置文件和代碼過去啦。
總結(jié)
以上就是這篇文章的全部?jī)?nèi)容了，希望本文的內(nèi)容對(duì)大家的學(xué)習(xí)或者工作能帶來(lái)一定的幫助，如果有疑問大家可以留言交流，謝謝大家對(duì)服務(wù)器之家的支持。
原文鏈接：http://www.cnblogs.com/mantgh/p/7425113.html
