list集合转换成datatable

Posted 2021-01-31 mact

 /// 将list集合转换成datatable
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static System.Data.DataTable ListToDataTable(IList list)
        {
            System.Data.DataTable result = new System.Data.DataTable();
            if (list.Count > 0)
            {
                PropertyInfo[] propertys = list[0].GetType().GetProperties();
                foreach (PropertyInfo pi in propertys)
                {
                    //获取类型
                    Type colType = pi.PropertyType;
                    //当类型为Nullable<>时
                    if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition() == typeof(Nullable<>)))
                    {
                        colType = colType.GetGenericArguments()[0];
                    }
                    result.Columns.Add(pi.Name, colType);
                }
                for (int i = 0; i < list.Count; i++)
                {
                    ArrayList tempList = new ArrayList();
                    foreach (PropertyInfo pi in propertys)
                    {
                        object obj = pi.GetValue(list[i], null);
                        tempList.Add(obj);
                    }
                    object[] array = tempList.ToArray();
                    result.LoadDataRow(array, true);
                }
            }
            return result;
        }