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    <p>Based on the User Agent you've given, I've managed to get the device recognised as a mobile device using <a href="http://www.detectmobilebrowsers.com" rel="nofollow">www.detectmobilebrowsers.com</a>. It uses a Regex to evaluate the user agent and has many examples posted in various languages.</p> <p>I've adapted the example into a method that you can call;</p> <pre><code>public bool DeviceIsMobile(string userAgent) { Regex regex1 = new Regex(@"(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino", RegexOptions.IgnoreCase | RegexOptions.Multiline); Regex regex2 = new Regex(@"1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-", RegexOptions.IgnoreCase | RegexOptions.Multiline); if ((regex1.IsMatch(userAgent) || regex2.IsMatch(userAgent.Substring(0, 4)))) { return true; } return false; } </code></pre> <p>And you can get the User Agent with;</p> <pre><code>HttpContext.Current.Request.UserAgent </code></pre> <p><strong>MVC3</strong></p> <p>You could write a custom <code>ViewEngine</code> to perform this check and automatically show the .Mobile.cshtml view. Scott Hanselman did a good post on <a href="http://www.hanselman.com/blog/NuGetPackageOfTheWeek10NewMobileViewEnginesForASPNETMVC3SpeccompatibleWithASPNETMVC4.aspx" rel="nofollow">how to write a mobile-aware ViewEngine</a> - adapting this should get you what you need;</p> <pre><code>public class MobileRazorViewEngine : RazorViewEngine { public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache) { string userAgent = controllerContext.HttpContext.Request.UserAgent; string overrideViewName = DeviceIsMobile(userAgent) ? viewName + ".Mobile" : viewName; ViewEngineResult result = NewFindView(controllerContext, overrideViewName, masterName, useCache); // If we're looking for a Mobile view and couldn't find it try again without modifying the viewname if (overrideViewName.Contains(".Mobile") &amp;&amp; (result == null || result.View == null)) { result = NewFindView(controllerContext, viewName, masterName, useCache); } return result; } private ViewEngineResult NewFindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache) { // Get the name of the controller from the path string controller = controllerContext.RouteData.Values["controller"].ToString(); string area = ""; try { area = controllerContext.RouteData.DataTokens["area"].ToString(); } catch { } // Create the key for caching purposes string keyPath = Path.Combine(area, controller, viewName); // Try the cache if (useCache) { //If using the cache, check to see if the location is cached. string cacheLocation = ViewLocationCache.GetViewLocation(controllerContext.HttpContext, keyPath); if (!string.IsNullOrWhiteSpace(cacheLocation)) { return new ViewEngineResult(CreateView(controllerContext, cacheLocation, masterName), this); } } // Remember the attempted paths, if not found display the attempted paths in the error message. var attempts = new List&lt;string&gt;(); string[] locationFormats = string.IsNullOrEmpty(area) ? ViewLocationFormats : AreaViewLocationFormats; // for each of the paths defined, format the string and see if that path exists. When found, cache it. foreach (string rootPath in locationFormats) { string currentPath = string.IsNullOrEmpty(area) ? string.Format(rootPath, viewName, controller) : string.Format(rootPath, viewName, controller, area); if (FileExists(controllerContext, currentPath)) { ViewLocationCache.InsertViewLocation(controllerContext.HttpContext, keyPath, currentPath); return new ViewEngineResult(CreateView(controllerContext, currentPath, masterName), this); } // If not found, add to the list of attempts. attempts.Add(currentPath); } // if not found by now, simply return the attempted paths. return new ViewEngineResult(attempts.Distinct().ToList()); } } </code></pre> <p>To use this, you need to add the ViewEngine to your <code>App_Start</code> and use;</p> <pre><code>ViewEngines.Engines.Add(new MobileRazorViewEngine()); </code></pre> <p><strong>MVC4</strong></p> <p>As pointed out by Andrus, the above answer using ViewEngines is targeted towards MVC3. In MVC4, you could extend <code>DefaultDisplayMode</code> to write your own custom check for mobile;</p> <pre><code>public class RegexMobileDisplay : DefaultDisplayMode { public RegexMobileDisplay() : base("Mobile") { ContextCondition = context =&gt; DeviceIsMobile(context.Request.UserAgent); } } </code></pre> <p>And registering this in App_Start;</p> <pre><code>DisplayModeProvider.Instance.Modes.Insert(0, new RegexMobileDisplay()); </code></pre> <p>I hope this helps.</p> <p>Matt</p>
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    1. POHow to force Motorola 2180 mobile computer to be recognized as mobile device in ASP.NET MVC4 application
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    1. COThank you. How to set `Browser.IsMobileDevice` value to true if this code dedects mobile device so that .Mobile.cshtml views will be used automatically?
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    2. COI've reviewed my answer, I hope this helps.
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    3. COThank you, great answer and link but it is written for MVC3. MVC4 uses *.Mobile.cshtml automatically. It looks like we need to override IsMobileDevice to return true for MC2180 . In this case proper views are picked automatically and re-writing view engine is not needed. 51degrees.mobi implements this for other mobile devices, IsMobileDevice has changed and mobile views are picked automatically. How to implement this for MC2180?
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