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POAssociate File Extension with Application
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  1. POAssociate File Extension with Application
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    copied!<p>I've written a program that edits a specific filetype , and I want to give the user the option to set my application as the default editor for this filetype (since I don't want an installer) on startup.</p> <p>I've tried to write a re-useable method that associates a file for me (preferably on any OS, although I'm running Vista) by adding a key to HKEY_CLASSES_ROOT, and am using it with my application, but it doesn't seem to work.</p> <pre><code>public static void SetAssociation(string Extension, string KeyName, string OpenWith, string FileDescription) { RegistryKey BaseKey; RegistryKey OpenMethod; RegistryKey Shell; RegistryKey CurrentUser; BaseKey = Registry.ClassesRoot.CreateSubKey(Extension); BaseKey.SetValue("", KeyName); OpenMethod = Registry.ClassesRoot.CreateSubKey(KeyName); OpenMethod.SetValue("", FileDescription); OpenMethod.CreateSubKey("DefaultIcon").SetValue("", "\"" + OpenWith + "\",0"); Shell = OpenMethod.CreateSubKey("Shell"); Shell.CreateSubKey("edit").CreateSubKey("command").SetValue("", "\"" + OpenWith + "\"" + " \"%1\""); Shell.CreateSubKey("open").CreateSubKey("command").SetValue("", "\"" + OpenWith + "\"" + " \"%1\""); BaseKey.Close(); OpenMethod.Close(); Shell.Close(); CurrentUser = Registry.CurrentUser.CreateSubKey(@"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\" + Extension); CurrentUser = CurrentUser.OpenSubKey("UserChoice", RegistryKeyPermissionCheck.ReadWriteSubTree, System.Security.AccessControl.RegistryRights.FullControl); CurrentUser.SetValue("Progid", KeyName, RegistryValueKind.String); CurrentUser.Close(); } </code></pre> <p>Any idea why it doesn't work? An example use might be </p> <pre><code>SetAssociation(".ucs", "UCS_Editor_File", Application.ExecutablePath, "UCS File"); </code></pre> <p>The part of the method that uses "CurrentUser" seems to work if I do the same using regedit, but using my application it doesn't.</p>
 

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