CODEWITHSUNDEEP
c#asp.netasp.net-coreweb-config
Yurii N.
Yurii N.

Reputation: 5703

Read environment variables from web.config in Asp.Net Core

Here my web.config file:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified"/>
    </handlers>
    <aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="false">
      <environmentVariables>
        <environmentVariable name="TEST_WEBCONFIG_VARIABLE" value="some test webconfig variable value" />
      </environmentVariables>
    </aspNetCore>
  </system.webServer>
</configuration>

How can I read TEST_WEBCONFIG_VARIABLE from my web.config in Startup.cs?

I tried Configuration["TEST_WEBCONFIG_VARIABLE"], but this variable doesn't exist in configuration values list.

Upvotes: 4

Views: 8493

Answers (2)

Sanket
Sanket

Reputation: 19997

While running from Visual Studio, use launchSettings.json like this-

  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "TEST_WEBCONFIG_VARIABLE":"123"
      }
    },
    "SamplePractice": {
      "commandName": "Project",
      "launchBrowser": true,
      "launchUrl": "http://localhost:5000",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "TEST_WEBCONFIG_VARIABLE":"123"
      }
    }
  }

Since launchSettings.json is only limited to Visual Studio, In case of publish version use web.config like this-

<aspNetCore processPath="dotnet" arguments=".\MyAspNetCoreApplication.dll" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="false" >
  <environmentVariables>
    <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="Development" />
    <environmentVariable name="TEST_WEBCONFIG_VARIABLE" value="123" />
  </environmentVariables>
</aspNetCore>

And this environment value will read across application using -

Environment.GetEnvironmentVariable("TEST_WEBCONFIG_VARIABLE");

NOTE! that it only works in case of publish.

Upvotes: 5

Jamadan
Jamadan

Reputation: 2313

Pretty sure you just need to call:

For individual setting: Environment.GetEnvironmentVariable("TEST_WEBCONFIG_VARIABLE"‌​);

For list of settings: Environment.GetEnvironmentVariables().GetEnumerator();

Because you are accessing EnvironmentVariables from config not AppSettings

Upvotes: 3

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