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How to detect a mobile browser in ASP.NET

Posted on | March 31, 2009 | 2 Comments

I’ve been having this issue with mobile development for quite sometime that I couldn’t get the mobile browser accurately by just using the Request.Browser.isMobileDevice property and I’ve found this piece of code here

Looks pretty useful.


public static bool isMobileBrowser()
{
//GETS THE CURRENT USER CONTEXT
HttpContext context = HttpContext.Current;

//FIRST TRY BUILT IN ASP.NT CHECK
if (context.Request.Browser.IsMobileDevice)
{
return true;
}
//THEN TRY CHECKING FOR THE HTTP_X_WAP_PROFILE HEADER
if (context.Request.ServerVariables["HTTP_X_WAP_PROFILE"] != null)
{
return true;
}
//THEN TRY CHECKING THAT HTTP_ACCEPT EXISTS AND CONTAINS WAP
if (context.Request.ServerVariables["HTTP_ACCEPT"] != null &&
context.Request.ServerVariables["HTTP_ACCEPT"].ToLower().Contains(“wap”))
{
return true;
}
//AND FINALLY CHECK THE HTTP_USER_AGENT
//HEADER VARIABLE FOR ANY ONE OF THE FOLLOWING
if (context.Request.ServerVariables["HTTP_USER_AGENT"] != null)
{
//Create a list of all mobile types
string[] mobiles =
new[]
{
“midp”, “j2me”, “avant”, “docomo”,
“novarra”, “palmos”, “palmsource”,
“240×320″, “opwv”, “chtml”,
“pda”, “windows ce”, “mmp/”,
“blackberry”, “mib/”, “symbian”,
“wireless”, “nokia”, “hand”, “mobi”,
“phone”, “cdm”, “up.b”, “audio”,
“SIE-”, “SEC-”, “samsung”, “HTC”,
“mot-”, “mitsu”, “sagem”, “sony”
, “alcatel”, “lg”, “eric”, “vx”,
“NEC”, “philips”, “mmm”, “xx”,
“panasonic”, “sharp”, “wap”, “sch”,
“rover”, “pocket”, “benq”, “java”,
“pt”, “pg”, “vox”, “amoi”,
“bird”, “compal”, “kg”, “voda”,
“sany”, “kdd”, “dbt”, “sendo”,
“sgh”, “gradi”, “jb”, “dddi”,
“moto”, “iphone”
};

//Loop through each item in the list created above
//and check if the header contains that text
foreach (string s in mobiles)
{
if (context.Request.ServerVariables["HTTP_USER_AGENT"].
ToLower().Contains(s.ToLower()))
{
return true;
}
}
}

return false;
}

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Category: ASP .NET, Web Development
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Comments

2 Responses to “How to detect a mobile browser in ASP.NET”

  1. Bhavesh Sanghani
    June 30th, 2009 @ 9:27 am

    Hi,

    My browser string is as below :
    Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.5.21022; .NET CLR 3.5.30729; OfficeLiveConnector.1.3; OfficeLivePatch.0.0; .NET CLR 3.0.30729)

    According to your script, it is matching “NEC” in OfficeLiveConnector so I am not able to match it perfectly.

    Pls. help

  2. Amit
    August 12th, 2009 @ 7:42 am

    Hello

    You can do above very easily and even more than that using http://www.51degrees.mobi/Products/NETMobileAPI

    It is a free open source .net mobile api which gives detailed information of the device making the request and also has the facility to redirect user automatically to mobile landing page when request in coming from mobile device.

    Hope it helps you.

    Thanks

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