C# Winfrom DataGridView DataSource绑定数据源后--解决排序问题

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public class SortBindingHelper<T> : BindingList<T>
   {
       private bool isSortedCore = true;
       private ListSortDirection sortDirectionCore = ListSortDirection.Ascending;
       private PropertyDescriptor sortPropertyCore = null;
       private string defaultSortItem;
 
       public SortBindingHelper() : base() { }
 
       public SortBindingHelper(IList<T> list) : base(list) { }
 
       protected override bool SupportsSortingCore
       {
           get { return true; }
       }
 
       protected override bool SupportsSearchingCore
       {
           get { return true; }
       }
 
       protected override bool IsSortedCore
       {
           get { return isSortedCore; }
       }
 
       protected override ListSortDirection SortDirectionCore
       {
           get { return sortDirectionCore; }
       }
 
       protected override PropertyDescriptor SortPropertyCore
       {
           get { return sortPropertyCore; }
       }
 
       protected override int FindCore(PropertyDescriptor prop, object key)
       {
           for (int i = 0; i < this.Count; i++)
           {
               if (Equals(prop.GetValue(this[i]), key)) return i;
           }
           return -1;
       }
 
       protected override void ApplySortCore(PropertyDescriptor prop, ListSortDirection direction)
       {
           isSortedCore = true;
           sortPropertyCore = prop;
           sortDirectionCore = direction;
           Sort();
       }
 
       protected override void RemoveSortCore()
       {
           if (isSortedCore)
           {
               isSortedCore = false;
               sortPropertyCore = null;
               sortDirectionCore = ListSortDirection.Ascending;
               Sort();
           }
       }
 
       public string DefaultSortItem
       {
           get { return defaultSortItem; }
           set
           {
               if (defaultSortItem != value)
               {
                   defaultSortItem = value;
                   Sort();
               }
           }
       }
 
       private void Sort()
       {
           List<T> list = (this.Items as List<T>);
           list.Sort(CompareCore);
           ResetBindings();
       }
 
       private int CompareCore(T o1, T o2)
       {
           int ret = 0;
           if (SortPropertyCore != null)
           {
               ret = CompareValue(SortPropertyCore.GetValue(o1), SortPropertyCore.GetValue(o2), SortPropertyCore.PropertyType);
           }
           if (ret == 0 && DefaultSortItem != null)
           {
               PropertyInfo property = typeof(T).GetProperty(DefaultSortItem, BindingFlags.Public | BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.IgnoreCase, null, null, new Type[0], null);
               if (property != null)
               {
                   ret = CompareValue(property.GetValue(o1, null), property.GetValue(o2, null), property.PropertyType);
               }
           }
           if (SortDirectionCore == ListSortDirection.Descending) ret = -ret;
           return ret;
       }
 
       private static int CompareValue(object o1, object o2, Type type)
       {
           if (o1 == null) return o2 == null ? 0 : -1;
           else if (o2 == null) return 1;
           else if (type.IsPrimitive || type.IsEnum) return Convert.ToDouble(o1).CompareTo(Convert.ToDouble(o2));
           else if (type == typeof(DateTime)) return Convert.ToDateTime(o1).CompareTo(o2);
           else return String.Compare(o1.ToString().Trim(), o2.ToString().Trim());
       }
   }

使用方式：

private void NewMethod()
       {
           List<StudentInfo> list = new List<StudentInfo>();
           for (int i = 1; i <= 50; i++)
           {
               StudentInfo stu = new StudentInfo();
               stu.NameA = "学生aaaaaaaa" + i;
               string str = i.ToString().PadLeft(3, '0');//001
               stu.Age = str;
               list.Add(stu);
           }
 
           SortBindingHelper<StudentInfo> temp = new SortBindingHelper<StudentInfo>();
           foreach (StudentInfo item in list)
           {
               temp.Add(item);
           }
 
           this.dgvList.DataSource = temp;
       }