refresh a comboBox after button click

See more:

C#

SQL-Server

WinForms

VS2012

i have a form with a comboBox, a textBox, and a button. the comboBox shows items from an sql database using dataBindingSources. after filling the textBox and clicking the button, a new item is added to this database, but i can't see this new item in the comboBox until i close and re-open the windowsForm. how to refresh the comboBox without close/re-open???

here's the code:

private void button2_Click(object sender, EventArgs e)
        {
            {

                SqlConnection myConnection = new SqlConnection("****");
                myConnection.Open();
                
                try
                {
                    SqlCommand myCommand = myConnection.CreateCommand();
                    myCommand.CommandText = "INSERT INTO Items (NameItem) " +
                "Values ('" + textBox2.Text + "')";

                    myCommand.ExecuteNonQuery();
                    MessageBox.Show("Item Added", "OK");
       
                }
                catch (SqlException exp)
                {
                    MessageBox.Show(exp.Message);
                }

                finally
                {
                    
                    myConnection.Close();
                    textBox2.Clear();
                    
                    
                }
              
            }