How to specify a relative SQLite database path in C#?

Question

My database is located outside the application folder Example:

Database: SampleApplication\\Database\\Database.sqlite

Application: SampleApplication\\Application\\program.cs

My code is as below.

string relativePath = @"SampleApplication\Database\Database.sqlite";
string currentPath;
string absolutePath;
string connectionString;
currentPath = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);
absolutePath = Path.Combine(currentPath, relativePath);
connectionString = string.Format("Data Source={0};Version=3;Pooling=True;Max Pool Size=100;", absolutePath);
m_dbConnection = new SQLiteConnection(connectionString);
m_dbConnection.Open();

Answer 1

Alright, I figured it out guys.

string relativePath = @"Database\Database.sqlite";
var parentdir = Path.GetDirectoryName(Application.StartupPath);
string myString = parentdir.Remove(parentdir.Length -34, 34);
string absolutePath = Path.Combine(myString, relativePath);
string connectionString = string.Format("Data Source={0};Version=3;Pooling=True;Max Pool Size=100;", absolutePath);
m_dbConnection = new SQLiteConnection(connectionString);
m_dbConnection.Open();

I removed the characters from the parentdir till SampleApplication\\ and added it with the relativePath . That makes an absolutePath to the database . The number 34 in the third line signifies how many characters to be remove from the end of parentdir .

Answer 2

尝试这个

var parentdir =Path.GetDirectoryName(System.Windows.Forms.Application.StartupPath);

Answer 3

I guess you need to modify your connection string, so for basic connect to SQL LITE DATABASE, you would do this:

Data Source=c:\mydb.db;Version=3;

enter code here

In memory database:

Data Source=:memory:;Version=3;New=True;

With password

Data Source=c:\mydb.db;Version=3;Password=myPassword;

You could do this also in your c# code:

var connectionString = @"data source=c:\TestData\testsqldata.s3db; Version=3;"
            connection = new SQLiteConnection(connectionString);
            connection.Open();

Answer 4

In an ASP CORE project if your db is in Data folder, write the following code in startup.cs :

public void ConfigureServices(IServiceCollection services)
{
      services.AddDbContext<MyContext>(options =>
          options.UseSqlite("Data Source=" + 
          Path.Combine(Directory.GetCurrentDirectory(), "Data\\sqlite.db"))
      );
}