Create a layout MobileLayout.aspx for your mobile site and paste the code in OnInit
string _absoluteUri = String.Format("{0}://{1}{2}", HttpContext.Current.Request.Url.Scheme, HttpContext.Current.Request.Url.Host, HttpContext.Current.Request.RawUrl);
string _host = HttpContext.Current.Request.Url.Host;
private string _isMobileSet;
protected override void OnInit(EventArgs e)
{
if (Util.IsMobileBrowser(HttpContext.Current))
{
if (HttpContext.Current.Session["IsMobileSet"] != null)
{
string isMobileSetSession = HttpContext.Current.Session["IsMobileSet"].ToString();
switch (isMobileSetSession)
{
case "false":
{
QueryString qs = new QueryString(_absoluteUri);
if (qs.HasParameter("IsMobileSet"))
{
_isMobileSet = qs.GetParameter("IsMobileSet");
switch (_isMobileSet)
{
case "false":
{
_host = _host.Replace("m.", "");
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "false");
HttpContext.Current.Response.Redirect(qs.All);
}
break;
case "true":
{
HttpContext.Current.Session["IsMobileSet"] = "true";
}
break;
default:
{
HttpContext.Current.Session["IsMobileSet"] = "true";
}
break;
}
}
else
{
_host = _host.Replace("m.", "");
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "false");
HttpContext.Current.Response.Redirect(qs.All);
}
}
break;
case "true":
{
QueryString qs = new QueryString(_absoluteUri);
if (qs.HasParameter("IsMobileSet"))
{
_isMobileSet = qs.GetParameter("IsMobileSet");
switch (_isMobileSet)
{
case "false":
{
_host = _host.Replace("m.", "");
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "false");
HttpContext.Current.Response.Redirect(qs.All);
}
break;
}
}
}
break;
}
}
else
{
QueryString qs = new QueryString(_absoluteUri);
if (qs.HasParameter("IsMobileSet"))
{
_isMobileSet = qs.GetParameter("IsMobileSet");
switch (_isMobileSet)
{
case "false":
{
HttpContext.Current.Session["IsMobileSet"] = "false";
_host = _host.Replace("m.", "");
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
HttpContext.Current.Response.Redirect(qs.All);
}
break;
default:
HttpContext.Current.Session["IsMobileSet"] = "true";
break;
}
}
else
HttpContext.Current.Session["IsMobileSet"] = "true";
}
}
else
{
_host = _host.Replace("m.", "");
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
QueryString qs = new QueryString(_absoluteUri);
HttpContext.Current.Session["IsMobileSet"] = "false";
qs.SetParameter("IsMobileSet", "false");
HttpContext.Current.Response.Redirect(qs.All);
}
base.OnInit(e);
}
On your Desktop Layout use the following code:
string _absoluteUri = String.Format("{0}://{1}{2}", HttpContext.Current.Request.Url.Scheme, HttpContext.Current.Request.Url.Host, HttpContext.Current.Request.RawUrl);
string _host = HttpContext.Current.Request.Url.Host;
private string _isMobileSet;
Item _item = Sitecore.Context.Item;
protected override void OnInit(EventArgs e)
{
if (Util.IsMobileBrowser(HttpContext.Current))
{
bool hasMobileDevie = false;
LayoutDefinition layout = LayoutDefinition.Parse(_item[FieldIDs.LayoutField]);
if (layout.Devices.Count > 0)
{
if (layout.Devices.Cast<DeviceDefinition>().Any(device => device.ID.Contains(Constants.MobileDeviceId)))
hasMobileDevie = true;
else
{
if (_item.Fields[FieldIDs.LayoutField].ContainsStandardValue && _item.Template.StandardValues != null)
{
_item = _item.Template.StandardValues;
layout = LayoutDefinition.Parse(_item[FieldIDs.LayoutField]);
if (layout.Devices.Count > 0)
{
if (layout.Devices.Cast<DeviceDefinition>().Any(device => device.ID.Contains(Constants.MobileDeviceId)))
hasMobileDevie = true;
}
}
}
}
else
{
if (_item.Template.StandardValues != null)
{
_item = _item.Template.StandardValues;
layout = LayoutDefinition.Parse(_item[FieldIDs.LayoutField]);
if (layout.Devices.Count > 0)
{
if (layout.Devices.Cast<DeviceDefinition>().Any(device => device.ID.Contains(Constants.MobileDeviceId)))
hasMobileDevie = true;
}
}
}
if (hasMobileDevie)
{
if (HttpContext.Current.Session["IsMobileSet"] != null)
{
string isMobileSetSession = HttpContext.Current.Session["IsMobileSet"].ToString();
switch (isMobileSetSession)
{
case "true":
{
QueryString qs = new QueryString(_absoluteUri);
if (qs.HasParameter("IsMobileSet"))
{
_isMobileSet = qs.GetParameter("IsMobileSet");
switch (_isMobileSet)
{
case "true":
{
if (!_host.Contains("m."))
_host = String.Format("{0}{1}", "m.", _host);
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "true");
HttpContext.Current.Response.Redirect(qs.All);
}
break;
case "false":
{
HttpContext.Current.Session["IsMobileSet"] = "false";
}
break;
default:
{
if (!_host.Contains("m."))
_host = String.Format("{0}{1}", "m.", _host);
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "true");
HttpContext.Current.Response.Redirect(qs.All);
}
break;
}
}
else
{
if (!_host.Contains("m."))
_host = String.Format("{0}{1}", "m.", _host);
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "true");
HttpContext.Current.Response.Redirect(qs.All);
}
}
break;
case "false":
{
QueryString qs = new QueryString(_absoluteUri);
if (qs.HasParameter("IsMobileSet"))
{
_isMobileSet = qs.GetParameter("IsMobileSet");
switch (_isMobileSet)
{
case "true":
{
if (!_host.Contains("m."))
_host = String.Format("{0}{1}", "m.", _host);
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
HttpContext.Current.Session["IsMobileSet"] = "true";
qs.SetParameter("IsMobileSet", "true");
HttpContext.Current.Response.Redirect(qs.All);
}
break;
}
}
}
break;
}
}
else
{
QueryString qs = new QueryString(_absoluteUri);
if (qs.HasParameter("IsMobileSet"))
{
_isMobileSet = qs.GetParameter("IsMobileSet");
switch (_isMobileSet)
{
case "false":
{
HttpContext.Current.Session["IsMobileSet"] = "false";
}
break;
case "true":
{
if (_host.Contains("www"))
{
_host = _host.Replace("www", "m");
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "true");
HttpContext.Current.Session["IsMobileSet"] = "true";
HttpContext.Current.Response.Redirect(qs.All);
}
else
{
if (!_host.Contains("m."))
_host = String.Format("{0}.{1}", "m", HttpContext.Current.Request.Url.Host);
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "true");
HttpContext.Current.Session["IsMobileSet"] = "true";
HttpContext.Current.Response.Redirect(qs.All);
}
}
break;
default:
HttpContext.Current.Session["IsMobileSet"] = "false";
break;
}
}
else
{
if (_host.Contains("www"))
{
_host = _host.Replace("www", "m");
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "true");
HttpContext.Current.Session["IsMobileSet"] = "true";
HttpContext.Current.Response.Redirect(qs.All);
}
else
{
if (!_host.Contains("m."))
_host = String.Format("{0}.{1}", "m", HttpContext.Current.Request.Url.Host);
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
qs = new QueryString(_absoluteUri);
qs.SetParameter("IsMobileSet", "true");
HttpContext.Current.Session["IsMobileSet"] = "true";
HttpContext.Current.Response.Redirect(qs.All);
}
}
}
}
}
else
{
if (_host.Contains("m."))
{
_host = _host.Replace("m.", "");
_absoluteUri = _absoluteUri.Replace(HttpContext.Current.Request.Url.Host, _host);
QueryString qs = new QueryString(_absoluteUri);
HttpContext.Current.Session["IsMobileSet"] = "false";
qs.SetParameter("IsMobileSet", "false");
HttpContext.Current.Response.Redirect(qs.All);
}
}
base.OnInit(e);
}
a helper class to detect Mobile Device
public static bool IsMobileBrowser(HttpContext context)
{
//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 =
{
"midp", "j2me", "avant", "docomo",
"novarra", "palmos", "palmsource",
"240x320", "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
if (mobiles.Any(s => context.Request.ServerVariables["HTTP_USER_AGENT"].ToLower().Contains(s.ToLower())))
return true;
}
return false;
}
}
Setup your new site in web.config
<event name="publish:end">
<handler type="Sitecore.Publishing.HtmlCacheClearer, Sitecore.Kernel" method="ClearCache">
<sites hint="list">
<site>website</site>
<site>mobile_website</site>
</sites>
</handler>
</event>
<event name="publish:end:remote">
<handler type="Sitecore.Publishing.HtmlCacheClearer, Sitecore.Kernel" method="ClearCache">
<sites hint="list">
<site>website</site>
<site>mobile_website</site>
</sites>
</handler>
</event>
<site name="mobile_website" hostName="m.*.com" defaultDevice="Mobile" urlExtension="" virtualFolder="/" physicalFolder="/" rootPath="/sitecore/content" startItem="/home" database="web" domain="extranet" allowDebug="true" cacheHtml="true" htmlCacheSize="100MB" registryCacheSize="0" viewStateCacheSize="0" xslCacheSize="5MB" filteredItemsCacheSize="2MB" enablePreview="true" enableWebEdit="true" enableDebugger="true" disableClientData="false" />
<site name="website" urlExtension="" defaultDevice="Default" virtualFolder="/" physicalFolder="/" rootPath="/sitecore/content" startItem="/home" database="web" domain="extranet" allowDebug="true" cacheHtml="true" htmlCacheSize="100MB" registryCacheSize="0" viewStateCacheSize="0" xslCacheSize="5MB" filteredItemsCacheSize="2MB" enablePreview="true" enableWebEdit="true" enableDebugger="true" disableClientData="false" />
<!-- CACHE SIZES -->
<cacheSizes>
<sites>
<website>
<html>100MB</html>
<registry>0</registry>
<viewState>0</viewState>
<xsl>50MB</xsl>
</website>
<mobile_website>
<html>100MB</html>
<registry>0</registry>
<viewState>0</viewState>
<xsl>50MB</xsl>
</mobile_website>
</sites>
</cacheSizes>
Mortaza Kamal Nourestani, Sitecore, Umbraco, .NET, ASP.NET and Web Application 
This is great. I was just about to start a mobile site and this is perfect for what I need. thanks!
Mortaza, I think I have an easier way to do this. See my blog post here: http://www.paultiemann.com/index.php/2013/08/06/another-way-to-redirect-mobile-devices-to-m-subdomain.