使用OleDbDataAdapter读取CSV：忽略重复的列

Question

我有以下代码：

ArrayAdapter<String> adapter;
User user;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_your_parties);

    user = getUserData();
    fillUserParty(user);
    fillAdapter(user);

    ListView partiesListView = (ListView) findViewById(R.id.parties_list_view);
    Button goToCreatePartyButton = (Button) findViewById(R.id.go_to_create_party_button);
    if(adapter != null){
        partiesListView.setVisibility(View.VISIBLE);
        partiesListView.setAdapter(adapter);
    }else{
        goToCreatePartyButton.setVisibility(View.VISIBLE);
        goToCreatePartyButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                startActivity(new Intent(YourPartiesActivity.this, CreatePartyActivity.class));
            }
        });
    }
}

@Override
protected void onResume() {
    super.onResume();
    adapter.notifyDataSetChanged();
}

private void fillAdapter(User user){
    List<Party> parties = user.getParties();
    if(parties != null) {
        for (int i = 0; i < parties.size(); i++) {
            Party party = parties.get(i);
            adapter.add(party.getName());
        }
    }
}

private void fillUserParty(User user){
    SharedPreferences preferences = getSharedPreferences("Parties", MODE_PRIVATE);
    int numOfParties = CreatePartyActivity.checkNumberOfParties(preferences);
    for(int i=0; i<numOfParties; i++){
        String partyName = preferences.getString("Name" + i, "");
        if(partyName != ""){
            int id = preferences.getInt("Id" + i, 0);
            Party party = new Party(id, partyName);
            user.joinParty(party);
        }
    }
}

public User getUserData(){
    SharedPreferences preferences = getSharedPreferences("User", 0);
    int id = preferences.getInt("Id", 0);
    String username = preferences.getString("Username", "");
    String name = preferences.getString("Name", "");
    return new User(id, username, name);
}

如果.csv文件中有重复的列，则该列将不会包含在 using (var dt= new DataTable()) { var connString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=\"{0}\\\"; Extended Properties=\"text;HDR={1};FMT={2}\"", dir, headers, format); var query = "SELECT * FROM [" + file + "]"; using (var conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString)) { using (var adapter = new OleDbDataAdapter(query, connString)) { adapter.Fill(dt);

中

由于某种原因，正在处理重复的列，就好像该列不存在一样。