ListHelper帮助类，DataTable和List之间转换

ListHelper帮助类，DataTable和List之间转换

public class ListHelper
   {
       /// <summary>
       /// 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)
               {
                   result.Columns.Add(pi.Name, pi.PropertyType);
               }

               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;
       }

       /// <summary>
       /// 指定数据实体转换为DataTable
       /// </summary>
       /// <typeparam name="T"></typeparam>
       /// <param name="t"></param>
       /// <returns></returns>
       public static DataTable ObjectToDataTable<T>(T t)
       {
           DataTable result = new DataTable();

           PropertyInfo[] propertys = t.GetType().GetProperties();
           foreach (PropertyInfo pi in propertys)
           {
               result.Columns.Add(pi.Name, pi.PropertyType);
           }

           ArrayList tempList = new ArrayList();
           foreach (PropertyInfo pi in propertys)
           {
               object obj = pi.GetValue(t, null);
               tempList.Add(obj);
           }
           object[] array = tempList.ToArray();
           result.LoadDataRow(array, true);


           return result;
       }

       /// <summary>
       /// 将集合类转换成DataTable，数据都转化为string类型
       /// </summary>
       /// <param name="list">集合</param>
       /// <returns></returns>
       public static DataTable ToDataTableAllString(IList list)
       {
           DataTable result = new DataTable();
           if (list.Count > 0)
           {
               PropertyInfo[] propertys = list[0].GetType().GetProperties();
               foreach (PropertyInfo pi in propertys)
               {
                   result.Columns.Add(pi.Name, typeof(String));
               }

               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;
       }
   }