How do I programmatically locate my Dropbox folder

问题:

How do I programmatically locate my Dropbox folder using C#? * Registry? * Environment Variable? * Etc...

回答1:

UPDATED SOLUTION

Dropbox now provides an info.json file as stated here: https://www.dropbox.com/en/help/4584

If you don't want to deal with parsing the JSON, you can simply use the following solution:

var infoPath = @"Dropbox\info.json";

var jsonPath = Path.Combine(Environment.GetEnvironmentVariable("LocalAppData"), infoPath);            

if (!File.Exists(jsonPath)) jsonPath = Path.Combine(Environment.GetEnvironmentVariable("AppData"), infoPath);

if (!File.Exists(jsonPath)) throw new Exception("Dropbox could not be found!");

var dropboxPath = File.ReadAllText(jsonPath).Split('\"')[5].Replace(@"\\", @"\");

If you'd like to parse the JSON, you can use the JavaScripSerializer as follows:

var serializer = new System.Web.Script.Serialization.JavaScriptSerializer();            

var dictionary = (Dictionary < string, object>) serializer.DeserializeObject(File.ReadAllText(jsonPath));

var dropboxPath = (string) ((Dictionary < string, object> )dictionary["personal"])["path"];

DEPRECATED SOLUTION:

You can read the the dropbox\host.db file. It's a Base64 file located in your AppData\Roaming path. Use this:

var dbPath = System.IO.Path.Combine(
                    Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Dropbox\\host.db");

var dbBase64Text = Convert.FromBase64String(System.IO.File.ReadAllText(dbPath));

var folderPath = System.Text.ASCIIEncoding.ASCII.GetString(dbBase64Text);

Hope it helps!

回答2:

UPDATE JULY 2016: THE CODE BELOW NO LONGER WORKS DUE TO CHANGES IN THE DROPBOX CLIENT, SEE ACCEPTED ANSWER ABOVE FOR UP-TO-DATE SOLUTION

Reinaldo's answer is essentially correct but it gives some junk output before the path because there seem to be two lines in the host.db file and in this case you only want to read the second one. The following will get you just the path.

string appDataPath = Environment.GetFolderPath(
                                   Environment.SpecialFolder.ApplicationData);
string dbPath = System.IO.Path.Combine(appDataPath, "Dropbox\\host.db");
string[] lines = System.IO.File.ReadAllLines(dbPath);
byte[] dbBase64Text = Convert.FromBase64String(lines[1]);
string folderPath = System.Text.ASCIIEncoding.ASCII.GetString(dbBase64Text);
Console.WriteLine(folderPath);

回答3:

Cleaner version based on previous answers (use var, added exists check, remove warnings):

    private static string GetDropBoxPath()
    {
        var appDataPath = Environment.GetFolderPath(
                                           Environment.SpecialFolder.ApplicationData);
        var dbPath = Path.Combine(appDataPath, "Dropbox\\host.db");

        if (!File.Exists(dbPath))
            return null;

        var lines = File.ReadAllLines(dbPath);
        var dbBase64Text = Convert.FromBase64String(lines[1]);
        var folderPath = Encoding.UTF8.GetString(dbBase64Text);

        return folderPath;
    }

回答4:

This seems to be the suggested solution from Dropbox: https://www.dropbox.com/help/4584?path=desktop_client_and_web_app

回答5:

Dropbox has added a new helper, there is a JSON file in either %APPDATA%\Dropbox\info.json or %LOCALAPPDATA%\Dropbox\info.json.

See https://www.dropbox.com/help/4584 for more information.

回答6:

public static string getDropBoxPath()
    {
        try
        {
            var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
            var dbPath = Path.Combine(appDataPath, "Dropbox\\host.db");
            if (!File.Exists(dbPath))
            {
                return null;
            }
            else
            {
                var lines = File.ReadAllLines(dbPath);
                var dbBase64Text = Convert.FromBase64String(lines[1]);
                var folderPath = Encoding.UTF8.GetString(dbBase64Text);
                return folderPath;
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }

回答7:

It's not stored in the registry (at least it isn't in plain text). I believe it's stored in the following location.

C:\Users\userprofile\AppData\Roaming\Dropbox

I would say it resides in the host.db or unlink.db file.

The config.db is a sqlite file. The other two are unknown (encrypted). The config.db contains a blob field only with the schema version.

回答8:

The host.db method has stopped working in later versions of dropbox.

https://www.dropbox.com/en/help/4584 gives the recommended approach.

Here is the c# code I wrote to parse the json and get the dropbox folder.

       // https://www.dropbox.com/en/help/4584 says info.json file is in one of two places
       string filename = Environment.ExpandEnvironmentVariables( @"%LOCALAPPDATA%\Dropbox\info.json" );
       if ( !File.Exists( filename ) ) filename = Environment.ExpandEnvironmentVariables( @"%APPDATA%\Dropbox\info.json" );
       JavaScriptSerializer serializer = new JavaScriptSerializer();
       // When deserializing a string without specifying a type you get a dictionary <string, object>
       Dictionary<string, object> obj = serializer.DeserializeObject( File.ReadAllText( filename ) ) as Dictionary<string, object>;
       obj = obj[ "personal" ] as Dictionary<string, object>;
       string path = obj[ "path" ] as string;
       return path;