access query in c#

for every  value we need to write query ,
if i want to execute for n number of value then we cant write the code
is it possible something like

SELECT top  questions  where quesnum ='" + combobox.text +" ' FROM [tblques] ORDER BY Rnd(quescode)  

Hi Rashmi,


Try this...


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace Combobox
{
    public partial class Form3 : Form
    {
        string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["dsn"];
        OleDbCommand com;
        string str;
        OleDbDataAdapter oledbda;
        DataSet ds;

        public Form3()
        {
            InitializeComponent();
        }

        private void Form3_Load(object sender, EventArgs e)
        {
            comboBox1.Items.Add("Select");
            comboBox1.Text = "Select";
            comboBox1.Items.Add("1");
            comboBox1.Items.Add("2");
            comboBox1.Items.Add("3");
          
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            OleDbConnection con = new OleDbConnection(ConnectionString);
            if (comboBox1.SelectedItem.ToString() == "1")
            {
                con.Open();
                str = "select top 1 *   FROM subject";
                com = new OleDbCommand(str, con);
                oledbda = new OleDbDataAdapter(com);
                ds = new DataSet();
                oledbda.Fill(ds, "subject");
                dataGridView1.DataMember = "subject";
                dataGridView1.DataSource = ds;
                con.Close();
            }
            else if (comboBox1.SelectedItem.ToString() == "2")
            {
                con.Open();
                str = "select top 2 *   FROM subject";
                com = new OleDbCommand(str, con);
                oledbda = new OleDbDataAdapter(com);
                ds = new DataSet();
                oledbda.Fill(ds, "subject");
                dataGridView1.DataMember = "subject";
                dataGridView1.DataSource = ds;
                con.Close();
            }
            else if (comboBox1.SelectedItem.ToString() == "3")
            {
                con.Open();
                str = "select top 3 *   FROM subject";
                com = new OleDbCommand(str, con);
                oledbda = new OleDbDataAdapter(com);
                ds = new DataSet();
                oledbda.Fill(ds, "subject");
                dataGridView1.DataMember = "subject";
                dataGridView1.DataSource = ds;
                con.Close();
            }
            else
            {
                dataGridView1.DataSource = null;
            }
        }
     
    }
}



Thanks
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