DataView dv;

                      DataTable tb;

                     tb = new DataTable("userlist");

                    tb.Columns.Add("name");

                    tb.Columns.Add("path");

                    for (int i = 0; i < t.Count; i++)

                    {

                        tb.Rows.Add(((Record)t[i]).Name, ((Record)t[i]).Ldappath);//类型转换

                    }

                    dv= new DataView(tb);