Variables de entorno <environmentVariables>

  • Artículo

Información general

El elemento <environmentVariables> del elemento <applicationPools>/<add> especifica una lista de variables de entorno que Internet Information Services (IIS) 10 pasará a un proceso de trabajo cuando se inicie una aplicación. El elemento <environmentVariables> contiene una colección de elementos <add> que definen los pares nombre-valor individuales para cada variable de entorno.

Compatibilidad

Versión Notas
IIS 10.0 El elemento <environmentVariables> se introdujo en IIS 10.
IIS 8.0 N/D
IIS 7.5 N/D
IIS 7.0 N/D
IIS 6,0 N/D

Configuración

El elemento <environmentVariables> se incluye en la instalación predeterminada de IIS 10.

Procedimientos

No hay ninguna interfaz de usuario para establecer las variables de entorno para IIS 10. Para ver ejemplos de cómo establecer las variables de entorno mediante programación, consulte la sección Ejemplos de código de este documento.

Configuración

Atributos

Ninguno.

Elementos secundarios

Elemento Descripción
add Elemento opcional.

Agrega una variable de entorno a la colección de variables de entorno.
remove Elemento opcional.

Quita una variable de entorno de la colección de variables de entorno.

Ejemplo de configuración

En el ejemplo siguiente se agrega una variable de entorno a un grupo de aplicaciones.

<applicationPools>
   <add name="Contoso" managedRuntimeVersion="v4.0" managedPipelineMode="Classic">
      <environmentVariables>
         <add name="foo" value="bar" />
      </environmentVariables>
   </add>
</applicationPools>

Código de ejemplo

En los ejemplos siguientes se muestra cómo agregar un par nombre-valor a la colección de variables de entorno.

AppCmd.exe

appcmd.exe set config -section:system.applicationHost/applicationPools /+"[name='Contoso'].environmentVariables.[name='foo',value='bar']" /commit:apphost

C#

using System;
using System.Text;
using Microsoft.Web.Administration;

internal static class Sample {
   private static void Main() {
      using(ServerManager serverManager = new ServerManager()) { 
         Configuration config = serverManager.GetApplicationHostConfiguration();
         ConfigurationSection applicationPoolsSection = config.GetSection("system.applicationHost/applicationPools");
         ConfigurationElementCollection applicationPoolsCollection = applicationPoolsSection.GetCollection();
         ConfigurationElement addElement = FindElement(applicationPoolsCollection, "add", "name", @"Contoso");
         if (addElement == null) throw new InvalidOperationException("Element not found!");
         ConfigurationElementCollection environmentVariablesCollection = addElement.GetCollection("environmentVariables");
         ConfigurationElement addElement1 = environmentVariablesCollection.CreateElement("add");
         addElement1["name"] = @"foo";
         addElement1["value"] = @"bar";
         environmentVariablesCollection.Add(addElement1);
         serverManager.CommitChanges();
      }
   }
   private static ConfigurationElement FindElement(ConfigurationElementCollection collection, string elementTagName, params string[] keyValues)
   {
      foreach (ConfigurationElement element in collection)
      {
         if (String.Equals(element.ElementTagName, elementTagName, StringComparison.OrdinalIgnoreCase))
         {
            bool matches = true;
            for (int i = 0; i < keyValues.Length; i += 2)
            {
               object o = element.GetAttributeValue(keyValues[i]);
               string value = null;
               if (o != null)
               {
                  value = o.ToString();
               }
               if (!String.Equals(value, keyValues[i + 1], StringComparison.OrdinalIgnoreCase))
               {
                  matches = false;
                  break;
               }
            }
            if (matches)
            {
               return element;
            }
         }
      }
      return null;
   }
}

VB.NET

Imports System
Imports System.Text
Imports Microsoft.Web.Administration

Class Sample
   
   Private Shared Sub Main()
      Dim serverManager As ServerManager = New ServerManager
      Dim config As Configuration = serverManager.GetApplicationHostConfiguration
      Dim applicationPoolsSection As ConfigurationSection = config.GetSection("system.applicationHost/applicationPools")
      Dim applicationPoolsCollection As ConfigurationElementCollection = applicationPoolsSection.GetCollection
      Dim addElement As ConfigurationElement = FindElement(applicationPoolsCollection, "add", "name", "Contoso")
      If (addElement Is Nothing) Then
         Throw New InvalidOperationException("Element not found!")
      End If
      Dim environmentVariablesCollection As ConfigurationElementCollection = addElement.GetCollection("environmentVariables")
      Dim addElement1 As ConfigurationElement = environmentVariablesCollection.CreateElement("add")
      addElement1("name") = "foo"
      addElement1("value") = "bar"
      environmentVariablesCollection.Add(addElement1)
      serverManager.CommitChanges
   End Sub

   Private Function FindElement(ByVal collection As ConfigurationElementCollection, ByVal elementTagName As String, ByVal ParamArray keyValues() As String) As ConfigurationElement
      For Each element As ConfigurationElement In collection
         If String.Equals(element.ElementTagName, elementTagName, StringComparison.OrdinalIgnoreCase) Then
            Dim matches As Boolean = True
            Dim i As Integer
            For i = 0 To keyValues.Length - 1 Step 2
               Dim o As Object = element.GetAttributeValue(keyValues(i))
               Dim value As String = Nothing
               If (Not (o) Is Nothing) Then
                  value = o.ToString
               End If
               If Not String.Equals(value, keyValues((i + 1)), StringComparison.OrdinalIgnoreCase) Then
                  matches = False
                  Exit For
               End If
            Next
            If matches Then
               Return element
            End If
         End If
      Next
      Return Nothing
   End Function

End Class

JavaScript

var adminManager = new ActiveXObject('Microsoft.ApplicationHost.WritableAdminManager');
adminManager.CommitPath = "MACHINE/WEBROOT/APPHOST";
var applicationPoolsSection = adminManager.GetAdminSection("system.applicationHost/applicationPools", "MACHINE/WEBROOT/APPHOST");
var applicationPoolsCollection = applicationPoolsSection.Collection;
var addElementPos = FindElement(applicationPoolsCollection, "add", ["name", "Contoso"]);
if (addElementPos == -1) throw "Element not found!";

var addElement = applicationPoolsCollection.Item(addElementPos);
var environmentVariablesCollection = addElement.ChildElements.Item("environmentVariables").Collection;

var addElement1 = environmentVariablesCollection.CreateNewElement("add");
addElement1.Properties.Item("name").Value = "foo";
addElement1.Properties.Item("value").Value = "bar";
environmentVariablesCollection.AddElement(addElement1);

adminManager.CommitChanges();

function FindElement(collection, elementTagName, valuesToMatch) {
   for (var i = 0; i < collection.Count; i++) {
      var element = collection.Item(i);
      if (element.Name == elementTagName) {
         var matches = true;
         for (var iVal = 0; iVal < valuesToMatch.length; iVal += 2) {
            var property = element.GetPropertyByName(valuesToMatch[iVal]);
            var value = property.Value;
            if (value != null) {
               value = value.toString();
            }
            if (value != valuesToMatch[iVal + 1]) {
               matches = false;
               break;
            }
         }
         if (matches) {
            return i;
         }
      }
   }
   return -1;
}

VBScript

Set adminManager = CreateObject("Microsoft.ApplicationHost.WritableAdminManager")
adminManager.CommitPath = "MACHINE/WEBROOT/APPHOST"
Set applicationPoolsSection = adminManager.GetAdminSection("system.applicationHost/applicationPools", "MACHINE/WEBROOT/APPHOST")
Set applicationPoolsCollection = applicationPoolsSection.Collection

addElementPos = FindElement(applicationPoolsCollection, "add", Array("name", "Contoso"))
If addElementPos = -1 Then
   WScript.Echo "Element not found!"
   WScript.Quit
End If

Set addElement = applicationPoolsCollection.Item(addElementPos)
Set environmentVariablesCollection = addElement.ChildElements.Item("environmentVariables").Collection

Set addElement1 = environmentVariablesCollection.CreateNewElement("add")
addElement1.Properties.Item("name").Value = "foo"
addElement1.Properties.Item("value").Value = "bar"
environmentVariablesCollection.AddElement(addElement1)

adminManager.CommitChanges()

Function FindElement(collection, elementTagName, valuesToMatch)
   For i = 0 To CInt(collection.Count) - 1
      Set element = collection.Item(i)
      If element.Name = elementTagName Then
         matches = True
         For iVal = 0 To UBound(valuesToMatch) Step 2
            Set property = element.GetPropertyByName(valuesToMatch(iVal))
            value = property.Value
            If Not IsNull(value) Then
               value = CStr(value)
            End If
            If Not value = CStr(valuesToMatch(iVal + 1)) Then
               matches = False
               Exit For
            End If
         Next
         If matches Then
            Exit For
         End If
      End If
   Next
   If matches Then
      FindElement = i
   Else
      FindElement = -1
   End If
End Function