1、直接使用   List<int> lstID = (from d in dt.AsEnumerable() select d.Field<int>("ID")).ToList(); //使用orderby关键字进行排序 List<string> listJobTitle = (from d in dvBaseInfo.ToTable().AsEnumerable() orderby d.Field<int>("OrderNo") select d.Field<string>("VName")).ToList(); 2、封装方法 /// <summary> /// 获取某一列的所有值 /// </summary> /// <typeparam name="T">列数据类型</typeparam> /// <param name="dtSource">数据表</param> /// <param name="filedName">列名</param> /// <returns></returns> public static List<T> GetColumnValues<T>(DataTable dtSource,string filedName) { 　　return (from r in dtSource.AsEnumerable() select r.Field<T>("ID")).ToList<T>(); }   方法调用： 获取字段ID的所有值 DataTable dt = new DataTable(); List<int> ids= DataTablePro.GetColumnValues<int>(dt, "ID");