asp.net webapi upload Picture example

  This article mainly introduces ASP.net webapi upload picture examples, the need for friends can refer to the

The code is as follows: [httppost]  public task<hashtable> imgupload ()   {     //check is Multipart/form-data       if (! Request.Content.IsMimeMultipartContent ("Form-data"))           throw new Httpresponseexception (Httpstatuscode.unsupportedmediatype);     /File save directory path       String Savetemppath = "~/sayplaces/" + "/saypic/saypictemp/";      String Dirtemppath = Httpcontext.curren T.server.mappath (Savetemppath);     /Set upload directory       var provider = new Multipartformdatastr Eamprovider (Dirtemppath);     //var queryp = Request.getquerynamevaluepairs ();//Get the set of key values for the query string       var task = Request.Content.ReadAsMultipartAsync (provider) .          continuewith& Lt Hashtable> (o =>          {              Hashtable hash = New Hashtable ();              hash["error"] = 1;              hash["errmsg" = "Upload error";  &NB Sp           var file = provider. Filedata[0];//provider. formdata              String orfilename = file. Headers.ContentDisposition.FileName.TrimStart (' "). TrimEnd (' "');              FileInfo FileInfo = new FileInfo (file. LocalFilename);                                 //MAX File               int maxSize = 10000000;            &NBS P if (FileInfo. Length <= 0)               {                & nbsp hash["error"] = 1;                  hash["errmsg" = "Please select Upload file." ";              }              else if (FileInfo. Length > MaxSize)               {              &NB Sp   hash["error"] = 1;                  hash["errmsg" = "Upload file size exceeds limit." ";             }              else     &N Bsp       {                  string fileext = Orfilename. Substring (Orfilename. LastIndexOf ('. '));                  //definition allow uploaded file extensions             &NB Sp     String filetypes = "Gif,jpg,jpeg,png,bmp";                  IF (String.IsNullOrEmpty (fileext) | | Array.indexof (Filetypes.split (', '), fileext.substring (1). ToLower ()) = = 1               &NBSP   {                      hash["error" = 1;    &nbsp ;                 hash["errmsg" = "Upload file name extension is not allowed extension." ";                 }                  Else                 {              &NBS P       String ymd = DateTime.Now.ToString ("YyyyMMdd", System.Globalization.DateTimeFormatInfo.InvariantInfo);                  & nbsp   String NewFileName = DateTime.Now.ToString ("Yyyymmddhhmmss_ffff", System.Globalization.DateTimeFormatInfo.InvariantInfo);                  & nbsp   FileInfo. CopyTo (Path.Combine (Dirtemppath, NewFileName + fileext), true);                &NB Sp &nbSp   FileInfo. Delete ();                      hash["error" = 0;    &nbs P                 hash["errmsg"] = "Upload success";                 }             }              R Eturn hash;         });      return task; }