获取sqlite数据库文件路径

Question

Hi everyone i can't set a relative path to open my database, the project is structured in this mood

projectname
db/acces.db
info/try.cs

This is the code inside try.cs with which i should open the database, obviously if I put the full path it goes:

 try {
    using (SQLiteConnection conn = new SQLiteConnection(@"data source="db/access.db")
      {
        conn.Open();
        using (SQLiteCommand fmd = conn.CreateCommand()){
        fmd.CommandText = @"SELECT * FROM 'test';
        fmd.CommandType = CommandType.Text;
        SQLiteDataReader r = fmd.ExecuteReader();
        while (r.Read())
          Debug.Writeline("foo");
        conn.Close();
      }
    }
 catch (Exception e){
    Debug.WriteLine("Errors");
  }

I should take the path of the acces.db file, not complete but relative to my project, to be set in data source, how should i do?

Answer 1

You can use something like this:

    using System.IO;
var connection = "Data Source=" + Path.Combine(Directory.GetCurrentDirectory(), "db\\access.db")
    try {
            using (SQLiteConnection conn = new SQLiteConnection(connection)
              {
                conn.Open();
                using (SQLiteCommand fmd = conn.CreateCommand()){
                fmd.CommandText = @"SELECT * FROM 'test';
                fmd.CommandType = CommandType.Text;
                SQLiteDataReader r = fmd.ExecuteReader();
                while (r.Read())
                  Debug.Writeline("foo");
                conn.Close();
              }
            }
         catch (Exception e){
            Debug.WriteLine("Errors");
          }

Answer 2

You said you should get something of type Data Source=C:\\Users\\mypc\\Documents\\tesrepo\\Myapp\\testApp\\db\\test.db .

Here is how to get the correct path.

Project path：

Directory.GetParent(workingDirectory).Parent.FullName;

Add the path you want at the end: For example, the address of the 123.mp3 file in the music folder here is:

string filepath = Path.Combine(projectDirectory + "\\music\\123.mp3");

//Get db address

string workingDirectory = Environment.CurrentDirectory;
string projectDirectory = Directory.GetParent(workingDirectory).Parent.FullName;
string dbpath = Path.Combine(projectDirectory + "\\db\\test.db");

dbpath is what you want.

If you have any questions about my code, please add a comment below.

Updated：

You can import the updated file into the output directory through this operation.

Your path would work without any modification.