List<ModelJD> data = myDalJD.GetAllDataList(); List<string> list= new List<string>();list= datalist4.Select(p => p.name).ToList();  //只取name字段，重新生成新的List集合this.cmbJdUserName.DataSource = list.Distinct().ToList(); //去重復，綁定數據后面要加ToList()