将集合类转换成DataTable

         /// 将集合类转换成DataTable
        /// </summary>
        /// <param name="list">集合</param>
        /// <returns></returns>
        public static DataTable ToDataTable(IList list)
        {
            DataTable result = new DataTable();
            if (list.Count > 0)
            {
                PropertyInfo[] propertys = list[0].GetType().GetProperties();
                foreach (PropertyInfo pi in propertys)
                {

                    Type colType = pi.PropertyType; if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition() == typeof(Nullable<>))) //避免空值报错
                    {

                        colType = colType.GetGenericArguments()[0];

                    }

                    if (pi.Name != "DataTable_Action_")  //避免列要求有效的 DataType错误，主要是针对自定义数据类型
                    {

                        result.Columns.Add(new DataColumn(pi.Name, colType));
                    }

                }

                for (int i = 0; i < list.Count; i++)
                {
                    ArrayList tempList = new ArrayList();
                    foreach (PropertyInfo pi in propertys)
                    {
                        if (pi.Name != "DataTable_Action_")//避免列要求有效的 DataType错误，主要是针对自定义数据类型

                        {
                            object obj = pi.GetValue(list[i], null) == null ? DBNull.Value : pi.GetValue(list[i], null); //避免空值报错

                            //object obj = pi.GetValue(list[i], null);
                            tempList.Add(obj);
                        }
                    }
                    object[] array = tempList.ToArray();
                    result.LoadDataRow(array, true);
                }
            }
            return result;
        }