ASP.NET Browser Compatibility

Updated Release: Browser_Compatibility (Nov 11, 2009)

drabell — Tue, 10 Nov 2009 13:30:05 GMT

Quick fix to Web Browsers' compatibility issue (ASP.NET, C#)

Released: Browser_Compatibility (Nov 11, 2009)

Tue, 10 Nov 2009 13:30:05 GMT

Quick fix to Web Browsers' compatibility issue (ASP.NET, C#)

Created Issue: IIS 7 Request is not available in this context exception [6171]

ahribernik — Mon, 09 Nov 2009 01:17:51 GMT

Running code on IIS 7.0 in Integrated mode (the default) causes "Request is not available in this context" exception.

Cause
http://mvolo.com/blogs/serverside/archive/2007/11/10/Integrated-mode-Request-is-not-available-in-this-context-in-Application_5F00_Start.aspx

Workaround
Switch the application pool into Compatibility mode. The downside is slower execution on IIS7

Solution
http://webguild.dyndns.org/Blog/archive/2007/10/04/porting-web-from-vs2005-iis6-to-vs2008-iis7---issue.aspx

Updated Release: Browser_Compatibility (Oct 23, 2009)

drabell — Thu, 22 Oct 2009 16:55:40 GMT

Quick fix to Web Browsers' compatibility issue (ASP.NET, C#)

Released: Browser_Compatibility (Oct 23, 2009)

Thu, 22 Oct 2009 16:55:40 GMT

Quick fix to Web Browsers' compatibility issue (ASP.NET, C#)

Updated Release: Browser_Compatibility (Oct 22, 2009)

drabell — Wed, 21 Oct 2009 17:56:50 GMT

Quick fix to Web Browsers' compatibility issue (ASP.NET, C#)

Released: Browser_Compatibility (Oct 22, 2009)

Wed, 21 Oct 2009 17:56:50 GMT

Quick fix to Web Browsers' compatibility issue (ASP.NET, C#)

Updated Wiki: Home

DrABELL — Wed, 21 Oct 2009 17:56:08 GMT

Project Description
Simple code snippet to improve ASP.NET Browser Compatibility, in particular: Chrome/Safari

Proper detection of the Web Browsers type and capabilities is rather important from the end-users and developers prospective as well. Modern Web-based "thin client" applications are essentially Platform/OS independent as the Browsers are gradually becoming a surrogate/“virtual” OS for online applications. The differences between Browsers, rooted in either branding or versioning create a Browser compatibility issues, which could cause some Web applications to run incorrectly if the compatibility requirements were not met. See the demo screenshot which demonstrates the ASP.NET Horizontal Menu control compatibility issue when using Google Chrome/Safari Web Browser.

Simple feature could be added to ASP.NET web applications in order to resolve this compatibility issues by setting the value of Page.ClientTarget = "uplevel" as shown below.

Working DEMO app, compatible with all major Browsers (IE/Firefox/Safari/Chrome) is available at: http://www.webinfocentral.com

Project contains:

1. Class Module "BrowserUpLevel.cs" to be placed in AppCode directory (ASP.NET 2.0+)_
2. Default Web page "Default.aspx" and corresponding code behind page with code snippet as shown below

The core Browser detection functionality is encapsulated in class module "BrowserUpLevel.cs" shown below:

//******************************************************************************
// Module           :   BrowserUpLevel.cs
// Author           :   Alexander Bell
// Date Created     :   03/15/2008
// Last Modified    :   10/10/2009
// Description      :   Code to improve Browser compatibility

//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;
using System.Web;

///*****************************************************************************
public static class BrowserCompatibility
{
    #region IsUplevel Browser property
    private enum UpLevel{chrome, firefox, safari }

    public static bool IsUplevel {
        get{
            bool ret = false;
            string _browser;

            try {

                if (HttpContext.Current == null) return ret;
                _browser = HttpContext.Current.Request.UserAgent.ToLower();

                foreach (UpLevel br in Enum.GetValues(typeof(UpLevel)))
                { if (_browser.Contains(br.ToString())) { ret = true; break; }}

                return ret;
            }
            catch { return ret; }
        }
    }
    #endregion
}
///*****************************************************************************

Sample code behind page contains code snippet to enforce "uplevel" Browser:

//******************************************************************************
// Module           :   Default.aspx.cs
// Description      :   code behind: set uplevel value to improve 
//                  :   ASP.NET Browser Compatibility
//******************************************************************************
// Author           :   Alexander Bell
// Company          :   Infosoft International Inc.
// DateCreated      :   03/11/2009
// Modified         :   10/14/2009
//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;

public partial class _Default : System.Web.UI.Page
{
    #region Page Pre-Init: force uplevel browser setting
    protected void Page_PreInit(object sender, EventArgs e)
    {
        if (BrowserCompatibility.IsUplevel) 
        { 
            Page.ClientTarget = "uplevel"; 
        }
    }
    #endregion
}
//******************************************************************************

Sample screenshot demonstrates ASP.NET Menu Bar Browser Compatibility issue:

Fig.1. Sample screenshot using ASP.NET in Google Chrome Browser

Recent online projects by Dr. Alexander Bell

YouTube embedded player with DataBound playlist http://www.webinfocentral.com/RESOURCES/VideoAudio.aspx
Silverlight 3.0 Media Player http://www.webinfocentral.com/RESOURCES/SilverlightPlayer.aspx
Motosport / NASCAR Map (Bing™) http://www.webinfocentral.com/RESOURCES/Motosport.aspx
FREE Geocoder with Bing™ Map http://www.webinfocentral.com/RESOURCES/Geocoder.aspx

.NET

ASP.NET

Browser

Browser Compatibility

FireFox

Safari

Chrome

Media Player

Video Player

Bing

Map

Updated Release: Browser_Compatibility (Oct 19, 2009)

drabell — Sun, 18 Oct 2009 14:18:03 GMT

Quick fix to Web Browsers' compatibility issue (ASP.NET, C#)

Released: Browser_Compatibility (Oct 19, 2009)

Sun, 18 Oct 2009 14:18:03 GMT

Quick fix to Web Browsers' compatibility issue (ASP.NET, C#)

Updated Wiki: Home

DrABELL — Sun, 18 Oct 2009 14:16:32 GMT

Project contains:

1. Class Module "BrowserUpLevel.cs" to be placed in AppCode directory (ASP.NET 2.0+)_
2. Default Web page "Default.aspx" and corresponding code behind page with code snippet as shown below

The core Browser detection functionality is encapsulated in class module "BrowserUpLevel.cs" shown below:

//******************************************************************************
// Module           :   BrowserUpLevel.cs
// Author           :   Alexander Bell
// Date Created     :   03/15/2008
// Last Modified    :   07/10/2009
// Version          :   1.07
// Description      :   Code to improve Browser compatibility

//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;
using System.Web;

///*****************************************************************************
public static class BrowserCompatibility
{
    #region IsUplevel Browser property
    private enum UpLevel{chrome, firefox, safari }

    public static bool IsUplevel {
        get{
            bool ret = false;
            string _browser;

            try {

                if (HttpContext.Current == null) return ret;
                _browser = HttpContext.Current.Request.UserAgent.ToLower();

                foreach (UpLevel br in Enum.GetValues(typeof(UpLevel)))
                { if (_browser.Contains(br.ToString())) { ret = true; break; }}

                return ret;
            }
            catch { return ret; }
        }
    }
    #endregion
}
///*****************************************************************************

Sample code behind page contains code snippet to enforce "uplevel" Browser:

//******************************************************************************
// Module           :   Default.aspx.cs
// Description      :   code behind: set uplevel value to improve 
//                  :   ASP.NET Browser Compatibility
//******************************************************************************
// Author           :   Alexander Bell
// Company          :   Infosoft International Inc.
// DateCreated      :   03/11/2009
// Modified         :   06/14/2009
// Version          :   1.03
//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;

public partial class _Default : System.Web.UI.Page
{
    #region Page Pre-Init: force uplevel browser setting
    protected void Page_PreInit(object sender, EventArgs e)
    {
        if (BrowserCompatibility.IsUplevel) 
        { 
            Page.ClientTarget = "uplevel"; 
        }
    }
    #endregion
}
//******************************************************************************

Sample screenshot demonstrates ASP.NET Menu Bar Browser Compatibility issue:

Fig.1. Sample screenshot using ASP.NET in Google Chrome Browser

Recent online projects by Dr. Alexander Bell

YouTube embedded player with DataBound playlist http://www.webinfocentral.com/RESOURCES/VideoAudio.aspx
Silverlight 3.0 Media Player http://www.webinfocentral.com/RESOURCES/SilverlightPlayer.aspx
Motosport / NASCAR Map (Bing™) http://www.webinfocentral.com/RESOURCES/Motosport.aspx
FREE Geocoder with Bing™ Map http://www.webinfocentral.com/RESOURCES/Geocoder.aspx

.NET

ASP.NET

Browser

Browser Compatibility

FireFox

Safari

Chrome

Media Player

Video Player

Bing

Map

Released: Browser_Compatibility (Oct 02, 2009)

Fri, 02 Oct 2009 12:19:32 GMT

Solution to fix Web Browsers' compatibility issue (ASP.NET, C#)

Updated Release: Browser_Compatibility (Oct 02, 2009)

drabell — Fri, 02 Oct 2009 12:19:32 GMT

Solution to fix Web Browsers' compatibility issue (ASP.NET, C#)

Updated Release: Browser_Compatibility (Sep 22, 2009)

drabell — Fri, 02 Oct 2009 12:17:43 GMT

Solution to fix Web Browsers' compatibility issue (ASP.NET, C#)

Updated Wiki: Home

DrABELL — Fri, 02 Oct 2009 12:15:36 GMT

Project contains:

1. Class Module "BrowserUpLevel.cs" to be placed in AppCode directory (ASP.NET 2.0+)_
2. Default Web page "Default.aspx" and corresponding code behind page with code snippet as shown below

The core Browser detection functionality is encapsulated in class module "BrowserUpLevel.cs" shown below:

//******************************************************************************
// Module           :   BrowserUpLevel.cs
// Author           :   Alexander Bell
// Date Created     :   03/15/2008
// Last Modified    :   07/10/2009
// Version          :   1.07
// Description      :   Code to improve Browser compatibility

//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;
using System.Web;

///*****************************************************************************
public static class BrowserCompatibility
{
    #region IsUplevel Browser property
    private enum UpLevel{chrome, firefox, safari }

    public static bool IsUplevel {
        get{
            bool ret = false;
            string _browser;

            try {

                if (HttpContext.Current == null) return ret;
                _browser = HttpContext.Current.Request.UserAgent.ToLower();

                foreach (UpLevel br in Enum.GetValues(typeof(UpLevel)))
                { if (_browser.Contains(br.ToString())) { ret = true; break; }}

                return ret;
            }
            catch { return ret; }
        }
    }
    #endregion
}
///*****************************************************************************

Sample code behind page contains code snippet to enforce "uplevel" Browser:

//******************************************************************************
// Module           :   Default.aspx.cs
// Description      :   code behind: set uplevel value to improve 
//                  :   ASP.NET Browser Compatibility
//******************************************************************************
// Author           :   Alexander Bell
// Company          :   Infosoft International Inc.
// DateCreated      :   03/11/2009
// Modified         :   06/14/2009
// Version          :   1.03
//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;

public partial class _Default : System.Web.UI.Page
{
    #region Page Pre-Init: force uplevel browser setting
    protected void Page_PreInit(object sender, EventArgs e)
    {
        if (BrowserCompatibility.IsUplevel) 
        { 
            Page.ClientTarget = "uplevel"; 
        }
    }
    #endregion
}
//******************************************************************************

Sample screenshot demonstrates ASP.NET Menu Bar Browser Compatibility issue:

Fig.1. Sample screenshot using ASP.NET in Google Chrome Browser

Recent online projects by Dr. Alexander Bell

YouTube embedded player API http://www.webinfocentral.com/RESOURCES/YouTubeMusicVideo.aspx
YouTube embedded player Data Bound API http://www.webinfocentral.com/RESOURCES/VideoAudio.aspx
Silverlight 3.0 Media Player http://www.webinfocentral.com/RESOURCES/SilverlightPlayer.aspx
Motosport / NASCAR Map (Bing™) http://www.webinfocentral.com/RESOURCES/Motosport.aspx
FREE Geocoder with Bing™ Map http://www.webinfocentral.com/RESOURCES/Geocoder.aspx

.NET

ASP.NET

Browser

Browser Compatibility

FireFox

Safari

Chrome

Media Player

Video Player

Bing

Map

Updated Wiki: Home

DrABELL — Fri, 02 Oct 2009 12:15:01 GMT

Project contains:

1. Class Module "BrowserUpLevel.cs" to be placed in AppCode directory (ASP.NET 2.0+)_
2. Default Web page "Default.aspx" and corresponding code behind page with code snippet as shown below

The core Browser detection functionality is encapsulated in class module "BrowserUpLevel.cs" shown below:

//******************************************************************************
// Module           :   BrowserUpLevel.cs
// Author           :   Alexander Bell
// Date Created     :   03/15/2008
// Last Modified    :   07/10/2009
// Version          :   1.07
// Description      :   Code to improve Browser compatibility

//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;
using System.Web;

///*****************************************************************************
public static class BrowserCompatibility
{
    #region IsUplevel Browser property
    private enum UpLevel{chrome, firefox, safari }

    public static bool IsUplevel {
        get{
            bool ret = false;
            string _browser;

            try {

                if (HttpContext.Current == null) return ret;
                _browser = HttpContext.Current.Request.UserAgent.ToLower();

                foreach (UpLevel br in Enum.GetValues(typeof(UpLevel)))
                { if (_browser.Contains(br.ToString())) { ret = true; break; }}

                return ret;
            }
            catch { return ret; }
        }
    }
    #endregion
}
///*****************************************************************************

Sample code behind page contains code snippet to enforce "uplevel" Browser:

//******************************************************************************
// Module           :   Default.aspx.cs
// Description      :   code behind: set uplevel value to improve 
//                  :   ASP.NET Browser Compatibility
//******************************************************************************
// Author           :   Alexander Bell
// Company          :   Infosoft International Inc.
// DateCreated      :   03/11/2009
// Modified         :   06/14/2009
// Version          :   1.03
//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;

public partial class _Default : System.Web.UI.Page
{
    #region Page Pre-Init: force uplevel browser setting
    protected void Page_PreInit(object sender, EventArgs e)
    {
        if (BrowserCompatibility.IsUplevel) 
        { 
            Page.ClientTarget = "uplevel"; 
        }
    }
    #endregion
}
//******************************************************************************

Sample screenshot demonstrates ASP.NET Menu Bar Browser Compatibility issue:

Fig.1. Sample screenshot using ASP.NET in Google Chrome Browser

Recent online projects by Dr. Alexander Bell

YouTube embedded player API http://www.webinfocentral.com/RESOURCES/YouTubeMusicVideo.aspx
YouTube embedded player Data Bound API http://www.webinfocentral.com/RESOURCES/VideoAudio.aspx
Silverlight 3.0 Media Player http://www.webinfocentral.com/RESOURCES/SilverlightPlayer.aspx
Motosport / NASCAR Map (Bing™)* http://www.webinfocentral.com/RESOURCES/Motosport.aspx*
FREE Geocoder with Bing™ Map* http://www.webinfocentral.com/RESOURCES/Geocoder.aspx*

.NET

ASP.NET

Browser

Browser Compatibility

FireFox

Safari

Chrome

Media Player

Video Player

Bing

Map

Updated Wiki: Home

DrABELL — Fri, 02 Oct 2009 12:13:31 GMT

Project contains:

1. Class Module "BrowserUpLevel.cs" to be placed in AppCode directory (ASP.NET 2.0+)_
2. Default Web page "Default.aspx" and corresponding code behind page with code snippet as shown below

The core Browser detection functionality is encapsulated in class module "BrowserUpLevel.cs" shown below:

//******************************************************************************
// Module           :   BrowserUpLevel.cs
// Author           :   Alexander Bell
// Date Created     :   03/15/2008
// Last Modified    :   07/10/2009
// Version          :   1.07
// Description      :   Code to improve Browser compatibility

//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;
using System.Web;

///*****************************************************************************
public static class BrowserCompatibility
{
    #region IsUplevel Browser property
    private enum UpLevel{chrome, firefox, safari }

    public static bool IsUplevel {
        get{
            bool ret = false;
            string _browser;

            try {

                if (HttpContext.Current == null) return ret;
                _browser = HttpContext.Current.Request.UserAgent.ToLower();

                foreach (UpLevel br in Enum.GetValues(typeof(UpLevel)))
                { if (_browser.Contains(br.ToString())) { ret = true; break; }}

                return ret;
            }
            catch { return ret; }
        }
    }
    #endregion
}
///*****************************************************************************

Sample code behind page contains code snippet to enforce "uplevel" Browser:

//******************************************************************************
// Module           :   Default.aspx.cs
// Description      :   code behind: set uplevel value to improve 
//                  :   ASP.NET Browser Compatibility
//******************************************************************************
// Author           :   Alexander Bell
// Company          :   Infosoft International Inc.
// DateCreated      :   03/11/2009
// Modified         :   06/14/2009
// Version          :   1.03
//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

using System;

public partial class _Default : System.Web.UI.Page
{
    #region Page Pre-Init: force uplevel browser setting
    protected void Page_PreInit(object sender, EventArgs e)
    {
        if (BrowserCompatibility.IsUplevel) 
        { 
            Page.ClientTarget = "uplevel"; 
        }
    }
    #endregion
}
//******************************************************************************

Sample screenshot demonstrates ASP.NET Menu Bar Browser Compatibility issue:

Fig.1. Sample screenshot using ASP.NET in Google Chrome Browser

Recent online projects by Dr. Alexander Bell

YouTube embedded player API http://www.webinfocentral.com/RESOURCES/YouTubeMusicVideo.aspx
YouTube embedded player Data Bound API http://www.webinfocentral.com/RESOURCES/VideoAudio.aspx
Silverlight 3.0 Media Player http://www.webinfocentral.com/RESOURCES/SilverlightPlayer.aspx
Interactive Motosport / NASCAR Map (Bing™)http://www.webinfocentral.com/RESOURCES/Motosport.aspx
FREE Geocoder with Bing™ Maphttp://www.webinfocentral.com/RESOURCES/Geocoder.aspx

.NET

ASP.NET

Browser

Browser Compatibility

FireFox

Safari

Chrome

Media Player

Video Player

Bing

Released: Browser_Compatibility (Sep 22, 2009)

Tue, 22 Sep 2009 04:43:30 GMT

Code to improve ASP.NET Browser Compatibility

Updated Release: Browser_Compatibility (Sep 22, 2009)

drabell — Tue, 22 Sep 2009 04:43:30 GMT

Code to improve ASP.NET Browser Compatibility

Updated Release: Browser_Compatibility (Sep 21, 2009)

drabell — Mon, 21 Sep 2009 22:02:36 GMT

Code to check Web Browser capabilities