Common/CollectionHelper.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Text;

namespace WMPT.Common
{
    /// <summary>
    /// ilist datatable 转
    /// </summary>
    public class CollectionHelper
    {
        private CollectionHelper()
        {
        }
        public static List<T> Distinct<T>(IList<T> list)
        {
            List<T> list1 = new List<T>();
            foreach (T obj in list)
            {
                if (!list1.Contains(obj))
                    list1.Add(obj);
            }
            return list1;
        }

        /// <summary>
        /// ilist转datatable
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static DataTable ConvertTo<T>(IList<T> list,string tablename)
        {
            DataTable table = CreateTable<T>(tablename);
            Type entityType = typeof(T);
            PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(entityType);

            foreach (T item in list)
            {
                DataRow row = table.NewRow();

                foreach (PropertyDescriptor prop in properties)
                {
                    object val = prop.GetValue(item);
                    if (val != null)
                        row[prop.Name] = val;
                }

                table.Rows.Add(row);
            }

            return table;
        }

        public static IList<T> ConvertTo<T>(IList<DataRow> rows)
        {