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I need a image generator in my ASP.NET MVC application, but I don't know if it is possible to use ASHX in ASP.NET MVC.
If there is an class similar to IHttpHandler that inherits IViewDataContainer, then I could use ViewData.Model on my ASHX.
I read a blog post about it but it seem outdated from the info I got in the ASP.NET forum
Any ideas?
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Now for creating a website, click on File, go to New and click on the Website. Now add Web Form by right clicking on the website and then provide the name of the Web Form just added. After adding web form we will add the generic handler in the website, by right clicking on the website and add new item.
An ashx file is a just a generic HTTP handler, so the easiest way to get this working is to create a new Web Site in the File menu, and just add the Handler. ashx file to the website root directory. Then, just run the site (F5) and browse to " YourSite/Handler. ashx ".
For adding ashx file follow below steps. Right click on Project. Select Add from the menu. In Add New Item dialog window select Generic Handler and click on Add.
MvcHandler. This handler is responsible for initiating the ASP.NET pipeline for an MVC application. It receives a Controller instance from the MVC controller factory; this controller handles further processing of the request.
You can also use this ImageResult class to return an image.
No need for a handler just create a route such as:
/ImageGenerator/{action}/{imageid}/
and return an ImageResult for the request.
public class ImageResult : ActionResult { public string SourceFilename { get; set; } public MemoryStream SourceStream { get; set; } public string ContentType { get; set; } public ImageResult(string sourceFilename) { SourceFilename = sourceFilename; ContentType = FileTypeHelper.GetContentType(SourceFilename); } public ImageResult(MemoryStream sourceStream, string contentType) { SourceStream = sourceStream; ContentType = contentType; } public override void ExecuteResult(ControllerContext context) { var res = context.HttpContext.Response; res.Clear(); res.Cache.SetCacheability(HttpCacheability.NoCache); res.ContentType = ContentType; if (SourceStream != null) { SourceStream.WriteTo(res.OutputStream); } else { res.TransmitFile(SourceFilename); } } } To use this do the following in a controller and add a route for it:
public ImageResult GetImage(int imageId) { // Database fetch of image details var imageInfo = repository.Get<ImageInfo>(imageId); return new ImageResult(imageInfo.FullFilename); } Have added the FileType helper class too:
public static class FileTypeHelper { public static string GetContentType(string SourceFileName) { var extension = Path.GetExtension(SourceFileName).ToLower(); switch (extension) { case ".ai": return "application/postscript"; case ".aif": return "audio/x-aiff"; case ".aifc": return "audio/x-aiff"; case ".aiff": return "audio/x-aiff"; case ".asc": return "text/plain"; case ".au": return "audio/basic"; case ".avi": return "video/x-msvideo"; case ".bcpio": return "application/x-bcpio"; case ".bin": return "application/octet-stream"; case ".c": return "text/plain"; case ".cc": return "text/plain"; case ".ccad": return "application/clariscad"; case ".cdf": return "application/x-netcdf"; case ".class": return "application/octet-stream"; case ".cpio": return "application/x-cpio"; case ".cpp": return "text/plain"; case ".cpt": return "application/mac-compactpro"; case ".cs": return "text/plain"; case ".csh": return "application/x-csh"; case ".css": return "text/css"; case ".dcr": return "application/x-director"; case ".dir": return "application/x-director"; case ".dms": return "application/octet-stream"; case ".doc": return "application/msword"; case ".drw": return "application/drafting"; case ".dvi": return "application/x-dvi"; case ".dwg": return "application/acad"; case ".dxf": return "application/dxf"; case ".dxr": return "application/x-director"; case ".eps": return "application/postscript"; case ".etx": return "text/x-setext"; case ".exe": return "application/octet-stream"; case ".ez": return "application/andrew-inset"; case ".f": return "text/plain"; case ".f90": return "text/plain"; case ".fli": return "video/x-fli"; case ".flv": return "video/x-flv"; case ".gif": return "image/gif"; case ".gtar": return "application/x-gtar"; case ".gz": return "application/x-gzip"; case ".h": return "text/plain"; case ".hdf": return "application/x-hdf"; case ".hh": return "text/plain"; case ".hqx": return "application/mac-binhex40"; case ".htm": return "text/html"; case ".html": return "text/html"; case ".ice": return "x-conference/x-cooltalk"; case ".ief": return "image/ief"; case ".iges": return "model/iges"; case ".igs": return "model/iges"; case ".ips": return "application/x-ipscript"; case ".ipx": return "application/x-ipix"; case ".jpe": return "image/jpeg"; case ".jpeg": return "image/jpeg"; case ".jpg": return "image/jpeg"; case ".js": return "application/x-javascript"; case ".kar": return "audio/midi"; case ".latex": return "application/x-latex"; case ".lha": return "application/octet-stream"; case ".lsp": return "application/x-lisp"; case ".lzh": return "application/octet-stream"; case ".m": return "text/plain"; case ".man": return "application/x-troff-man"; case ".me": return "application/x-troff-me"; case ".mesh": return "model/mesh"; case ".mid": return "audio/midi"; case ".midi": return "audio/midi"; case ".mime": return "www/mime"; case ".mov": return "video/quicktime"; case ".movie": return "video/x-sgi-movie"; case ".mp2": return "audio/mpeg"; case ".mp3": return "audio/mpeg"; case ".mpe": return "video/mpeg"; case ".mpeg": return "video/mpeg"; case ".mpg": return "video/mpeg"; case ".mpga": return "audio/mpeg"; case ".ms": return "application/x-troff-ms"; case ".msh": return "model/mesh"; case ".nc": return "application/x-netcdf"; case ".oda": return "application/oda"; case ".pbm": return "image/x-portable-bitmap"; case ".pdb": return "chemical/x-pdb"; case ".pdf": return "application/pdf"; case ".pgm": return "image/x-portable-graymap"; case ".pgn": return "application/x-chess-pgn"; case ".png": return "image/png"; case ".pnm": return "image/x-portable-anymap"; case ".pot": return "application/mspowerpoint"; case ".ppm": return "image/x-portable-pixmap"; case ".pps": return "application/mspowerpoint"; case ".ppt": return "application/mspowerpoint"; case ".ppz": return "application/mspowerpoint"; case ".pre": return "application/x-freelance"; case ".prt": return "application/pro_eng"; case ".ps": return "application/postscript"; case ".qt": return "video/quicktime"; case ".ra": return "audio/x-realaudio"; case ".ram": return "audio/x-pn-realaudio"; case ".ras": return "image/cmu-raster"; case ".rgb": return "image/x-rgb"; case ".rm": return "audio/x-pn-realaudio"; case ".roff": return "application/x-troff"; case ".rpm": return "audio/x-pn-realaudio-plugin"; case ".rtf": return "text/rtf"; case ".rtx": return "text/richtext"; case ".scm": return "application/x-lotusscreencam"; case ".set": return "application/set"; case ".sgm": return "text/sgml"; case ".sgml": return "text/sgml"; case ".sh": return "application/x-sh"; case ".shar": return "application/x-shar"; case ".silo": return "model/mesh"; case ".sit": return "application/x-stuffit"; case ".skd": return "application/x-koan"; case ".skm": return "application/x-koan"; case ".skp": return "application/x-koan"; case ".skt": return "application/x-koan"; case ".smi": return "application/smil"; case ".smil": return "application/smil"; case ".snd": return "audio/basic"; case ".sol": return "application/solids"; case ".spl": return "application/x-futuresplash"; case ".src": return "application/x-wais-source"; case ".step": return "application/STEP"; case ".stl": return "application/SLA"; case ".stp": return "application/STEP"; case ".sv4cpio": return "application/x-sv4cpio"; case ".sv4crc": return "application/x-sv4crc"; case ".swf": return "application/x-shockwave-flash"; case ".t": return "application/x-troff"; case ".tar": return "application/x-tar"; case ".tcl": return "application/x-tcl"; case ".tex": return "application/x-tex"; case ".tif": return "image/tiff"; case ".tiff": return "image/tiff"; case ".tr": return "application/x-troff"; case ".tsi": return "audio/TSP-audio"; case ".tsp": return "application/dsptype"; case ".tsv": return "text/tab-separated-values"; case ".txt": return "text/plain"; case ".unv": return "application/i-deas"; case ".ustar": return "application/x-ustar"; case ".vcd": return "application/x-cdlink"; case ".vda": return "application/vda"; case ".vrml": return "model/vrml"; case ".wav": return "audio/x-wav"; case ".wrl": return "model/vrml"; case ".xbm": return "image/x-xbitmap"; case ".xlc": return "application/vnd.ms-excel"; case ".xll": return "application/vnd.ms-excel"; case ".xlm": return "application/vnd.ms-excel"; case ".xls": return "application/vnd.ms-excel"; case ".xlw": return "application/vnd.ms-excel"; case ".xml": return "text/xml"; case ".xpm": return "image/x-xpixmap"; case ".xwd": return "image/x-xwindowdump"; case ".xyz": return "chemical/x-pdb"; case ".zip": return "application/zip"; default: return string.Format("application/{0}", extension); } } } You should just be able to return the image from the action? See here for more.
And yes, you can use ashx alongside MVC (by telling it to ignore the route) - but I'm not sure that is the best approach unless it is to re-use existing code.
Sorry guys, the link has been removed. It happens.
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