C#

using System;

namespace Akadia.BasicDelegate
{
    // Declaration
    public delegate int SimpleDelegate(int a);

    class TestDelegate
    {


        public int n2;


        public static int MyFunc(int b)
        {
            

            Console.WriteLine("I was called by delegate ...");


            TestDelegate t = new TestDelegate();

            t.n2 = b * 2;

            

            return t.n2;

        }



        public int N2
        {

            get { return n2;  }
          
        }
        
      
       
        public static void Main()
        {
            // Instantiation
            SimpleDelegate simpleDelegate = new SimpleDelegate(MyFunc);

            // Invocation
            simpleDelegate(4);



            Console.ReadKey();
        }
    }
}

public event PropertyChangedEventHandler PropertyChanged = delegate { };

the below code is working perfect for single item selection but i am unable to select more them one item and display corresponding data from database in datagridview.




            SqlDataAdapter sda=new SqlDataAdapter();
            DataSet ds=new DataSet();
            SqlCommand scmd=new SqlCommand();
            BindingSource bsource=new BindingSource();
private void button1_Click(object sender, EventArgs e)
{
    int i = checkedListBox1.CheckedItems.Count;

    if (checkedListBox1.SelectedIndex == -1 && checkedListBox2.SelectedIndex == -1)
        MessageBox.Show("Please select");
    else
    {
            for (int j = 0; j <= i-1; j++)
            {
                string s = "select * from grp where Groupname = " + "'" + checkedListBox1.CheckedItems[j].ToString() + "'";

                sda = new SqlDataAdapter(s, con);
                ds = new DataSet();
                SqlCommandBuilder scb = new SqlCommandBuilder(sda);
                sda.Fill(ds, "grp");
                bsource.DataSource = ds.Tables["grp"];
                dataGridView1.DataSource = bsource;

            }

    }
}