/// <summary>
/// The method is responsible for handling the subsystem of adding advertisements. Retrieves information from the form entered by the user.
/// Then it calls the InsertAnnouncement method by sending the previously retrieved information as method parameters.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Add_Announcement(object sender, EventArgs e)
{
db = new SQLDatabase();
db.Connect();
db.InsertAnnouncement(db.getId((string)Session["id"]), end_date.Value, one.Checked, subject.Value, content.Value);
Response.Redirect("MyActivities.aspx");
db.Disconnect();
}