C# DataSet转IList代码

DataSet转IList代码：

/// <summary>         、
        /// DataSet装换为泛型集合         
        /// </summary>         
        /// <typeparam name="T"></typeparam>         
        /// <param name="ds">DataSet</param>         
        /// <param name="tableIndex">待转换数据表索引</param>         
        /// <returns></returns>         
        public static IList<T> DataSetToIList<T>(DataSet ds, int tableIndex)
        {
            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];
        
            IList<T> result = new List<T>();
            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++)
                    {
                        if (pi.Name.Equals(dt.Columns[i].ColumnName))
                        {
                            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;
        }
        /// <summary>         
        /// DataSet装换为泛型集合        
        ///  </summary>     
        /// <typeparam name="T"></typeparam>   
        ///<param name="ds">DataSet</param>      
        /// <param name="tableName">待转换数据表名称</param>         
        /// <returns></returns>         
        /// 2008-08-01 22:47 HPDV2806         
        public static IList<T> DataSetToIList<T>(DataSet ds, string tableName)
        {
            int _TableIndex = 0; if (ds == null || ds.Tables.Count < 0)
                return null; if (string.IsNullOrEmpty(tableName))
                return null;
            for (int i = 0; i < ds.Tables.Count; i++)
            {
                if (ds.Tables[i].TableName.Equals(tableName))
                {
                    _TableIndex = i;
                    break;
                }
            }
            return DataSetToIList<T>(ds, _TableIndex);
        }

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