Checkboxlist in c#

Question

when I click the items in chaptercheckboxlist1 that chapters containing questions should display in another checkboxlist How to do this using windows form application c# with Access database

Satyapriya Nayak · Answer

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 Form1 : Form { string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings[dsn]; OleDbCommand com; string str; public Form1() { InitializeComponent(); } private void Form1_Load(object sender EventArgs e) { OleDbConnection con = new OleDbConnection(ConnectionString); con.Open(); str = select sub from subject group by sub; com = new OleDbCommand(str con); OleDbDataReader reader = com.ExecuteReader(); while (reader.Read()) { checkedListBox1.Items.Add(reader[sub].ToString()); } } private void checkedListBox1_SelectedIndexChanged(object sender EventArgs e) { checkedListBox2.Items.Clear(); OleDbConnection con = new OleDbConnection(ConnectionString); con.Open(); str = select * from subject where sub=' + checkedListBox1.SelectedItem + '; com = new OleDbCommand(str con); OleDbDataReader reader = com.ExecuteReader(); while (reader.Read()) { checkedListBox2.Items.Add(reader[chapter].ToString()); } con.Close(); reader.Close(); } } } Thanks If this post helps you mark it as answer