string liteConnection = @"Data Source = E:\小研究\AccessTest\SQLiteTest;";
            string sql = "Select * From Student";
            SQLiteConnection conn = new SQLiteConnection(liteConnection);
            DataTable dt = new DataTable();
            SQLiteDataAdapter da = new SQLiteDataAdapter(sql, liteConnection);
            da.Fill(dt);
            if (dt.Rows.Count > 0) {
                MessageBox.Show("成功~");
            }