web.config根据环境变量合并配置文件

在csproj工程项目文件里配置

<Target Name="ApplyXdtConfigTransform" BeforeTargets="Compile;Link">
<Copy SourceFiles="appsettings.dev.json" DestinationFiles="appsettings.$(Configuration.ToLower()).json" Condition="!Exists('appsettings.$(Configuration.ToLower()).json')" />
<Copy SourceFiles="nlog.$(Configuration.ToLower()).config" DestinationFiles="nlog.config" Condition="Exists('nlog.$(Configuration.ToLower()).config')" />
<Copy SourceFiles="nlog.template.config" DestinationFiles="nlog.config" Condition="!Exists('nlog.$(Configuration.ToLower()).config')" OverwriteReadOnlyFiles="true" />

<PropertyGroup>
<_SourceWebConfig>web.template.config</_SourceWebConfig>
<_XdtWebConfigTransform>web.$(Configuration.ToLower()).config</_XdtWebConfigTransform>
<_TargetWebConfig>web.config</_TargetWebConfig>
</PropertyGroup>
<Copy SourceFiles="web.dev.config" DestinationFiles="$(_XdtWebConfigTransform)" Condition="!Exists('$(_XdtWebConfigTransform)')" />
<Exec Command="dotnet transform-xdt --xml &quot;$(_SourceWebConfig)&quot; --transform &quot;$(_XdtWebConfigTransform)&quot; --output &quot;$(_TargetWebConfig)&quot;" Condition="Exists('$(_XdtWebConfigTransform)')" />
</Target>

 

 

 

web.template.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>

  <!--
    Configure your application settings in appsettings.json. Learn more at http://go.microsoft.com/fwlink/?LinkId=786380
  -->

  <system.webServer>
    <security>
      <requestFiltering>
        <!-- This will handle requests up to 200MB -->
        <requestLimits maxAllowedContentLength="204800000" />
      </requestFiltering>
    </security>
    <modules runAllManagedModulesForAllRequests="true">
      <remove name="WebDAVModule" />
    </modules>
    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified"/>
    </handlers>
    <aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" stdoutLogEnabled="false" stdoutLogFile=".\App_Data\logs\stdout" forwardWindowsAuthToken="false">
      <environmentVariables>
        <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="debug" />
      </environmentVariables>
    </aspNetCore>
  </system.webServer>
</configuration>

web.release.config

<?xml version="1.0" encoding="utf-8"?>

<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
  <system.webServer>
    <aspNetCore>
      <environmentVariables>
        <environmentVariable name="ASPNETCORE_ENVIRONMENT"
                             value="release"
                             xdt:Transform="SetAttributes"
                             xdt:Locator="Match(name)" />
      </environmentVariables>
    </aspNetCore>
  </system.webServer>
</configuration>