
  
  public partial class commandDelete : System.Web.UI.Page
  {
      protected void Page_Load(object sender, EventArgs e)
      {
          string connStr = "server=(local);uid=sa;pwd=123;database=demo";
          SqlConnection conn = new SqlConnection(【connStr】);
          SqlCommand cmd = new 【SqlCommand】(" 【Delete】 From users 【where】 username='123' ", conn);
          conn.【Open】();
          cmd.【ExecuteNonQuery】();
          conn.【Close】();
      }
  }

--答案--
   SqlCommand   ExecuteNonQuery   Delete   connStr   where   Close