i am trying to generate a method in event handler of combo box. I am trying to read data from the database using array so that when i click on the combo box it will link to the textboxes.

I have declared two arrays, one for combo box and another for texboxes

ComboBox[] cbArray = new ComboBox[4];

string[] q = new string[4];

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)


// ListQues();

//read the new index value of the combo box being selected

for (int i = 0; i < q.Length; ++i)


q[i] = "" + i;



//use this new index value as an INDEX to retrieve out from the answers from GLOBAL questions array.


Dataset class:

public DataSet Ques() //create dataset for ListQue()


OleDbConnection cnn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Environment.CurrentDirectory.ToString() + "\\bin\\Debug\\database\\quiz.mdb");


string query = "SELECT ques,ans1,ans2,ans3,ans4 FROM questions";

OleDbCommand com = new OleDbCommand(query, cnn);

DataSet ds1 = new DataSet();

OleDbDataAdapter adpt = new OleDbDataAdapter(com);

adpt.Fill(ds1, "questions");


return ds1;

public class questions


public string answer1;

public string answer2;

public string answer3;

public string answer4;


ListQues() class:

private void ListQues()


DataSet ds1 = new DataSet();

ds1 = Ques();

for (int i = 0; i <= ds1.Tables["questions"].Rows.Count-1; i++)


questions q = new questions();

q.answer1 = ds1.Tables["questions"].Rows[i]["ans1"].ToString();

q.answer2 = ds1.Tables["questions"].Rows[i]["ans2"].ToString();

q.answer3 = ds1.Tables["questions"].Rows[i]["ans3"].ToString();

q.answer4 = ds1.Tables["questions"].Rows[i]["ans4"].ToString();

txtAns1.Text = q.ToString();

txtAns2.Text = q.ToString();

txtAns3.Text = q.ToString();

txtAns4.Text = q.ToString();

comboBox1.DataSource = ds1.Tables[0];

comboBox1.DisplayMember = "ques";



Thanks in advance.

I have attached screenshot of the program which I am referring to.

I want to select another question, but the answers reflected must be matched to the correct question which is saved in the database.