public static class TransformToList    {        /// 
                 /// DataSet转换为泛型集合                 /// 
                 /// 
     
      泛型类型
                      /// DataSet数据集                 /// 待转换数据表索引,默认第0张表                 /// 
     
      返回泛型集合
                      public static List
     
       ToList
      
       (this DataSet ds, int tableIndex = 0)        {            if (ds == null || ds.Tables.Count < 0) return null;            if (tableIndex > ds.Tables.Count - 1)                return null;            if (tableIndex < 0)                tableIndex = 0;            DataTable dt = ds.Tables[tableIndex];            // 返回值初始化                         List
       
         result = new List
        
         ();            for (int j = 0; j < dt.Rows.Count; j++)            {                T _t = (T)Activator.CreateInstance(typeof(T));                PropertyInfo[] propertys = _t.GetType().GetProperties();                foreach (PropertyInfo pi in propertys)                {                    for (int i = 0; i < dt.Columns.Count; i++)                    {                        // 属性与字段名称一致的进行赋值                                                 if (pi.Name.Equals(dt.Columns[i].ColumnName))                        {                            // 数据库NULL值单独处理                                                         if (dt.Rows[j][i] != DBNull.Value)                                pi.SetValue(_t, dt.Rows[j][i], null);                            else                                pi.SetValue(_t, null, null);                            break;                        }                    }                }                result.Add(_t);            }            return result;        }        /// 
         
        /// DataRow 转成 模型        /// 
        /// 
                 /// 
                 /// 
                 public static T ToModel
         
          (this DataRow dr) where T : class, new()        {            T ob = new T();            if (dr != null)            {                Type vType = typeof(T);                //创建一个属性的列表                PropertyInfo[] prlist = vType.GetProperties();                DataColumnCollection vDataCoulumns = dr.Table.Columns;                try                {                    foreach (PropertyInfo vProInfo in prlist)                    {                        if (vDataCoulumns.IndexOf(vProInfo.Name) >= 0 && dr[vProInfo.Name] != DBNull.Value)                        {                            vProInfo.SetValue(ob, dr[vProInfo.Name], null);                        }                    }                }                catch (Exception ex)                {                }            }            return ob;        }    }