HttpRuntime Class (System.Web)

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Microsoft Visual Studio 2008/.NET Framework 3.5

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.NET Framework Class Library

HttpRuntime Class

Provides a set of ASP.NET run-time services for the current application.

Namespace: System.Web
Assembly: System.Web (in System.Web.dll)

Syntax

Visual Basic (Declaration)

<AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level := AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class HttpRuntime

Visual Basic (Usage)

Dim instance As HttpRuntime

[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class HttpRuntime

Visual C++

[AspNetHostingPermissionAttribute(SecurityAction::LinkDemand, Level = AspNetHostingPermissionLevel::Minimal)]
public ref class HttpRuntime sealed

JScript

public final class HttpRuntime

Remarks

The HttpRuntime object is used at the beginning of the ASP.NET pipeline model that processes HTTP requests. The ProcessRequest method drives all subsequent ASP.NET Web processing.

Page developers can use the HttpRuntime class properties to find out information about the current application domain for diagnostic purposes, for example. Developers creating custom process pipeline or a custom hosting environment should call the ProcessRequest method from a class derived from the HttpWorkerRequest or SimpleWorkerRequest class.

Examples

The following example demonstrates how to get properties of the HttpRuntime class representing the current application domain and display them to the browser.

Visual Basic

<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)

    Dim sb As New StringBuilder()
    Dim nl As String = "<br />"

    sb.Append("AppDomainAppId = " & _
      HttpRuntime.AppDomainAppId & nl)
    sb.Append("AppDomainAppPath = " & _
      HttpRuntime.AppDomainAppPath & nl)
    sb.Append("AppDomainAppVirtualPath = " & _
      HttpRuntime.AppDomainAppVirtualPath & nl)
    sb.Append("AppDomainId = " & _
      HttpRuntime.AppDomainId & nl)
    sb.Append("AspInstallDirectory = " & _
      HttpRuntime.AspInstallDirectory & nl)
    sb.Append("BinDirectory = " & _
      HttpRuntime.BinDirectory & nl)
    sb.Append("ClrInstallDirectory = " & _
      HttpRuntime.ClrInstallDirectory & nl)
    sb.Append("CodegenDir = " & _
      HttpRuntime.CodegenDir & nl)
    sb.Append("IsOnUNCShare = " & _
      HttpRuntime.IsOnUNCShare.ToString() & nl)
    sb.Append("MachineConfigurationDirectory = " & _
      HttpRuntime.MachineConfigurationDirectory & nl)

    label1.Text = sb.ToString()

  End Sub
</script>
<html  >
  <head>
    <title>HttpRuntime Example</title>
  </head>
  <body>    
    <form id="Form1" runat="server">
      <asp:label id="label1" runat="server"/>
    </form>
  </body>
</html>

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Page_Load(Object sender, System.EventArgs e)
  {
    StringBuilder sb = new StringBuilder();
    String nl = "<br />";

    sb.Append("AppDomainAppId = " + 
      HttpRuntime.AppDomainAppId + nl);
    sb.Append("AppDomainAppPath = " + 
      HttpRuntime.AppDomainAppPath + nl);
    sb.Append("AppDomainAppVirtualPath = " + 
      HttpRuntime.AppDomainAppVirtualPath + nl);
    sb.Append("AppDomainId = " + 
      HttpRuntime.AppDomainId + nl);
    sb.Append("AspInstallDirectory = " + 
      HttpRuntime.AspInstallDirectory + nl);
    sb.Append("BinDirectory = " + 
      HttpRuntime.BinDirectory + nl);
    sb.Append("ClrInstallDirectory = " + 
      HttpRuntime.ClrInstallDirectory + nl);
    sb.Append("CodegenDir = " + 
      HttpRuntime.CodegenDir + nl);
    sb.Append("IsOnUNCShare = " + 
      HttpRuntime.IsOnUNCShare.ToString() + nl);
    sb.Append("MachineConfigurationDirectory = " + 
      HttpRuntime.MachineConfigurationDirectory + nl);

    label1.Text = sb.ToString();
  }

</script>
<html  >
  <head>
    <title>HttpRuntime Example</title>
  </head>
  <body>    
    <form id="form1" runat="server">
      <asp:label id="label1" runat="server"/>
    </form>
  </body>
</html>

.NET Framework Security

AspNetHostingPermission
for operating in a hosted environment. Demand value: LinkDemand; Permission value: Minimal.

Inheritance Hierarchy

System..::.Object
System.Web..::.HttpRuntime

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

Reference

Other Resources

Page and Application Context in ASP.NET Web Applications