Question

bool ret = false;
try
{
    SQLiteConnection sqlConn = new SQLiteConnection("Data Source=" + m_dbName);
    sqlConn.Open();
    SQLiteCommand sqlComm = sqlConn.CreateCommand();
    sqlComm.CommandText = "DELETE FROM " + szTablename + " WHERE name=" + name + "";
    SQLiteDataAdapter sqlAdapter = new SQLiteDataAdapter(sqlComm);
    if (null == sqlAdapter)
    {
        ret = false;
    }
    else
    {
        ret = true;
    }
    sqlConn.Close();
    return ret;
}
catch (SQLiteException sqlEx)
{
    Console.WriteLine(sqlEx.Message);
    return false;
}

I have that code to delete a row in an SQLite database, but nothing is done after I click the delete button.

Answer 1

Instead of using a DataAdapter you could just execute the command directly:

using(SQLiteConnection sqlConn = new SQLiteConnection("Data Source=" + m_dbName))
{
    sqlConn.Open();
    //create command

    sqlCommand.ExecuteNonQuery();
}

You shouldn’t swallow any exceptions that get thrown from the ExecuteNonQuery method unless you can sensibly handle them. You should use parameterised queries instead of manually creating the queries by concatenating strings. You should also make sure you close the connection after you have finished using it as shown.