与here类似的问题。只针对Google Drive
而不是Dropbox
如何使用C#以编程方式查找Google Drive
文件夹?
发布于 2016-07-01 02:08:44
我接受了Sarath的回答,对它进行了修改,使其更具弹性(数据源路径周围的引号,以读者索引为条件的null条件,额外的错误检查,"using“以便适当地处理对象,添加了一堆注释,并添加了一些LINQ (因为,linq :-) )。
这个特定的实现捕获并记录异常,然后在我当前的应用程序需要的任何error...because上返回string.Empty。如果您的应用程序需要异常,请删除try/catch。
/// <summary>
/// Retrieves the local Google Drive directory, if any.
/// </summary>
/// <returns>Directory, or string.Empty if it can't be found</returns>
public static string GetGoogleDriveDirectory()
{
try
{
// Google Drive's sync database can be in a couple different locations. Go find it.
string appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
string dbName = "sync_config.db";
var pathsToTry = new[] { @"Google\Drive\" + dbName, @"Google\Drive\user_default\"+ dbName };
string syncDbPath = (from p in pathsToTry
where File.Exists(Path.Combine(appDataPath, p))
select Path.Combine(appDataPath, p))
.FirstOrDefault();
if (syncDbPath == null)
throw new FileNotFoundException("Cannot find Google Drive sync database", dbName);
// Build the connection and sql command
string conString = string.Format(@"Data Source='{0}';Version=3;New=False;Compress=True;", syncDbPath);
using (var con = new SQLiteConnection(conString))
using (var cmd = new SQLiteCommand("select * from data where entry_key='local_sync_root_path'", con))
{
// Open the connection and execute the command
con.Open();
var reader = cmd.ExecuteReader();
reader.Read();
// Extract the data from the reader
string path = reader["data_value"]?.ToString();
if (string.IsNullOrWhiteSpace(path))
throw new InvalidDataException("Cannot read 'local_sync_root_path' from Google Drive configuration db");
// By default, the path will be prefixed with "\\?\" (unless another app has explicitly changed it).
// \\?\ indicates to Win32 that the filename may be longer than MAX_PATH (see MSDN).
// Parts of .NET (e.g. the File class) don't handle this very well, so remove this prefix.
if (path.StartsWith(@"\\?\"))
path = path.Substring(@"\\?\".Length);
return path;
}
}
catch (Exception ex)
{
Trace.TraceError("Cannot determine Google Drive location. Error {0} - {1}", ex.Message, ex.StackTrace);
return string.Empty;
}
}
https://stackoverflow.com/questions/12173077
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