how to populate dynamic row in gridview from checklistbox items through button click at runtime

Please find a sample code for your question.

Steps Followed:

* I've created a checked list box and datagrid.
* Created a datagridview
* populated both with sample data
* on the checkedListBox1_ItemCheck event method, i've used LINQ to filter the datatable content based on the item checked.
* added the result dataset back to the grid.

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;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        DataTable dt1 = new DataTable();
        private void Form1_Load(object sender, EventArgs e)
        {
            string[] checkListItems = new string[] { "Item1", "Item2", "Item3", "Item4", "Item5" };

            checkedListBox1.DataSource = checkListItems;


            dt1.Columns.Add("ItemName");
            dt1.Columns.Add("ItemDescription");

            dt1.Rows.Add(new Object[] { "Item1", "This is Item 1" });
            dt1.Rows.Add(new Object[] { "Item2", "This is Item 2" });
            dt1.Rows.Add(new Object[] { "Item3", "This is Item 3" });
            dt1.Rows.Add(new Object[] { "Item4", "This is Item 4" });
            dt1.Rows.Add(new Object[] { "Item5", "This is Item 5" });

            dataGridView1.DataSource = dt1;
            dataGridView1.Refresh();
        }

        private void checkedListBox1_ItemCheck(object sender, ItemCheckEventArgs e)
        {
            var res = (from dtrows in dt1.AsEnumerable()
                       where dtrows.Field<string>("ItemName") == checkedListBox1.SelectedItem.ToString()
                       select new {
                           itemName = dtrows.Field<string>("ItemName"),
                           itemDesc = dtrows.Field<string>("ItemDescription")
                       }).ToList();
            dataGridView1.DataSource = res;
            dataGridView1.Refresh();
        }
    }
}

Hope this helps.