Get file name from URI string in C

Question

I have this method for grabbing the file name from a string URI  What can I do to make it more robust   private string GetFileName string hrefLink        string   parts   hrefLink Split           string fileName            if  parts Length  gt  0          fileName   parts parts Length - 1       else         fileName   hrefLink       return fileName

User · Answer

using System IO   private String GetFileName String hrefLink        return Path GetFileName hrefLink Replace                  THis assumes  of course  that you ve parsed out the file name   EDIT  2    using System IO   private String GetFileName String hrefLink        return Path GetFileName Uri UnescapeDataString hrefLink  Replace                  This should handle spaces and the like in the file name

User · Answer

this is my sample you can use           public static string GetFileNameValidChar string fileName                foreach  var item in System IO Path GetInvalidFileNameChars                          fileName   fileName Replace item ToString                           return fileName             public static string GetFileNameFromUrl string url                string fileName               if  Uri TryCreate url  UriKind Absolute  out Uri uri                         fileName   GetFileNameValidChar Path GetFileName uri AbsolutePath                      string ext               if   string IsNullOrEmpty fileName                         ext   Path GetExtension fileName               if  string IsNullOrEmpty ext                   ext     html               else                 ext                   return GetFileNameValidChar fileName   ext                       fileName   Path GetFileName url           if  string IsNullOrEmpty fileName                         fileName    noName                     ext   Path GetExtension fileName           if  string IsNullOrEmpty ext               ext     html           else             ext               fileName   fileName   ext          if   fileName StartsWith                   fileName   fileName Split      FirstOrDefault            fileName   fileName Split   amp    LastOrDefault   Split      LastOrDefault            return GetFileNameValidChar fileName           Usage   var fileName   GetFileNameFromUrl  http   cdn p30download com  b p30dl-software amp f Mozilla Firefox v58 0 x86 p30download com zip

User · Answer

Uri IsFile doesn t work with http urls  It only works for  file      From MSDN    The IsFile property is true when the Scheme property equals UriSchemeFile   So you can t depend on that   Uri uri   new Uri hreflink   string filename   System IO Path GetFileName uri LocalPath

User · Answer

As of 2020  handles query strings  amp  encoded URLs public static string GetFileNameFromUrl  string url        var decoded   HttpUtility UrlDecode url        if  decoded IndexOf  quot   quot   is    queryIndex  amp  amp  queryIndex    -1                decoded   decoded Substring 0  queryIndex              return Path GetFileName decoded

User · Answer

I think this will do what you need   var uri   new Uri hreflink   var filename   uri Segments Last

User · Answer

Simple and straight forward               Uri uri   new Uri documentAttachment DocumentAttachment PreSignedUrl               fileName   Path GetFileName uri LocalPath

User · Answer

The accepted answer is problematic for http urls  Moreover Uri LocalPath does Windows specific conversions  and as someone pointed out leaves query strings in there  A better way is to use Uri AbsolutePath  The correct way to do this for http urls is   Uri uri   new Uri hreflink   string filename   System IO Path GetFileName uri AbsolutePath

User · Answer

You can just make a System Uri object  and use IsFile to verify it s a file  then Uri LocalPath to extract the filename   This is much safer  as it provides you a means to check the validity of the URI as well     Edit in response to comment   To get just the full filename  I d use   Uri uri   new Uri hreflink   if  uri IsFile        string filename   System IO Path GetFileName uri LocalPath       This does all of the error checking for you  and is platform-neutral   All of the special cases get handled for you quickly and easily

User · Answer

Most other answers are either incomplete or don t deal with stuff coming after the path  query string hash    readonly static Uri SomeBaseUri   new Uri  http   canbeanything     static string GetFileNameFromUrl string url        Uri uri      if   Uri TryCreate url  UriKind Absolute  out uri           uri   new Uri SomeBaseUri  url        return Path GetFileName uri LocalPath       Test results   GetFileNameFromUrl                                                    GetFileNameFromUrl  test                                            test  GetFileNameFromUrl  test xml                                        test xml  GetFileNameFromUrl   test xml                                       test xml  GetFileNameFromUrl   test xml q 1                                   test xml  GetFileNameFromUrl   test xml q 1 amp x 3                               test xml  GetFileNameFromUrl  test xml q 1 amp x 3                                test xml  GetFileNameFromUrl  http   www a com test xml q 1 amp x 3               test xml  GetFileNameFromUrl  http   www a com test xml q 1 amp x 3 aidjsf        test xml  GetFileNameFromUrl  http   www a com a b c d                        d  GetFileNameFromUrl  http   www a com a b c d e

[c#] Get file name from URI string in C#

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