Master.CanYinWu.Utility/ListExtensions.cs

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using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace Master.CanYinWu.Utility
{
   public static class ListExtensions
    {
        /// <summary>
        /// 将指定的集合转换成DataTable。
        /// </summary>
        /// <param name="list">将指定的集合。</param>
        /// <returns>返回转换后的DataTable。</returns>
        public static DataTable ToDataTable(this IList list)
        {
            DataTable table = new DataTable();
            if (list.Count > 0)
            {
                PropertyInfo[] propertys = list[0].GetType().GetProperties();
                foreach (PropertyInfo pi in propertys)
                {
                    Type pt = pi.PropertyType;
                    if ((pt.IsGenericType) && (pt.GetGenericTypeDefinition() == typeof(Nullable<>)))
                    {
                        pt = pt.GetGenericArguments()[0];
                    }
                    table.Columns.Add(new DataColumn(pi.Name, pt));
                }

                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();
                    table.LoadDataRow(array, true);
                }
            }
            return table;
        }

        public static DataTable ToDataTable<T>(this List<T> list)
        {
            DataTable table = new DataTable();
            //创建列头
            PropertyInfo[] propertys = typeof(T).GetProperties();
            foreach (PropertyInfo pi in propertys)
            {
                Type pt = pi.PropertyType;
                if ((pt.IsGenericType) && (pt.GetGenericTypeDefinition() == typeof(Nullable<>)))
                {
                    pt = pt.GetGenericArguments()[0];