c open file with default application and parameters

Question

The most easy way to open a file with the default application is   System Diagnostics Process Start   c  myPDF pdf      However  I would like to know if exists a way to set parameters to the default application  because I would like to open a pdf in a determinate page number   I know how to do it creating a new process and setting the parameters  but this way I need to indicate the path of the application  and I would like to have a portable application and not to have to set the path of the application each time I use the application in other computer  My idea is that I expect that the computer has installed the pdf reader and only say what to page open   Thanks

User · Answer

you can try  with   Process process   new Process    process StartInfo FileName    yourProgram exe   process StartInfo Arguments           your parameters process Start

User · Answer

If you want the file to be opened with the default application  I mean without specifying Acrobat or Reader  you can t open the file in the specified page   On the other hand  if you are Ok with specifying Acrobat or Reader  keep reading     You can do it without telling the full Acrobat path  like this   Process myProcess   new Process        myProcess StartInfo FileName    acroRd32 exe     not the full application path myProcess StartInfo Arguments     A   page 2 OpenActions   C   example pdf   myProcess Start      If you don t want the pdf to open with Reader but with Acrobat  chage the second line like this   myProcess StartInfo FileName    Acrobat exe     You can query the registry to identify the default application to open pdf files and then define FileName on your process s StartInfo accordingly    Follow this question for details on doing that  Finding the default application for opening a particular file type on Windows

User · Answer

Please add Settings under Properties for the Project and make use of them this way you have clean and easy configurable settings that can be configured as default  How To  Create a New Setting at Design Time  Update  after comments below        Right   Click on project   Add New Item   Under Visual C  Items -  General   Select Settings File

User · Answer

I converted the VB code in the blog post linked by xsl to C  and modified it a bit   public static bool TryGetRegisteredApplication                       string extension  out string registeredApp        string extensionId   GetClassesRootKeyDefaultValue extension       if  extensionId    null                registeredApp   null          return false             string openCommand   GetClassesRootKeyDefaultValue              Path Combine new    extensionId   shell    open    command           if  openCommand    null                registeredApp   null          return false             registeredApp   openCommand                       Replace   1   string Empty                        Replace       string Empty                        Trim        return true     private static string GetClassesRootKeyDefaultValue string keyPath        using  var key   Registry ClassesRoot OpenSubKey keyPath                 if  key    null                        return null                     var defaultValue   key GetValue null           if  defaultValue    null                        return null                     return defaultValue ToString              EDIT - this is unreliable  See Finding the default application for opening a particular file type on Windows

User · Answer

this should be close   public static void OpenWithDefaultProgram string path        Process fileopener   new Process        fileopener StartInfo FileName    explorer       fileopener StartInfo Arguments          path             fileopener Start

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