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Page History: Quick Reference - ASP.NET

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Page Revision: Tue, Aug 23, 2011, 9:07 AM

General¶

Item	Code
Current HTTP Request object	`HttpContext.Current.Request`
Session ID	`string sessionId = HttpContext.Current.Session.SessionID;`
Maintaining scroll position on postback	In the `<%@ Page %>` directive, set the `MaintainScrollPositionOnPostback` property to `true`
Disabling caching of a page.	In the `Page_Load` event handler: `Response.Cache.SetCacheability(HttpCacheability.NoCache)`

Client Information¶

Item	Code
IP address	`Request.UserHostAddress`
Computer Name	`using System.Net; string remoteHost = Request.ServerVariables["REMOTE_HOST"]; IPHostEntry client = Dns.GetHostEntry(remoteHost); string clientName = client.HostName; uxClientNameLabel.Text = clientName;`
User Name	`using System.Net; string remoteUser = Request.ServerVariables["REMOTE_USER"];` or `string remoteUser = Request.ServerVariables["AUTH_USER"];` or `System.Web.HttpContext.Current.User.Identity`

URL of Application Root¶

The following method will return, for example, http://localhost:2297/Version 1.0/. This is the root directory of the web application: the current page's URL, stripped of the path, filename, and any query string. For more information on using this function with CSS, JS, and XSL files, go here.

{copytext|AppRoot}

Public Shared ReadOnly Property ApplicationRootUrl() As String
    Get
        Dim r As HttpRequest = HttpContext.Current.Request
        Dim result As String = r.Url.Scheme
        result &= System.Uri.SchemeDelimiter
        result &= r.Url.Authority
        result &= r.ApplicationPath
        result &= "/"
        Return result
    End Get
End Property

public static string AppRootUrl
{
    get
    {
        var r = HttpContext.Current.Request;
        var result = r.Url.Scheme;
        result += Uri.SchemeDelimiter;
        result += r.Url.Authority;
        result += r.ApplicationPath;
        result += "/";
        return result;
    }
}

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