datagridview 點擊列標題排序

datagridview 點擊列標題排序

裝載：做者：大亨夢 出處：http://www.cnblogs.com/fer-team/ 程序員知識庫：http://www.5uzh.com 本文版權歸做者和博客園共有，歡迎轉載，但未經做者贊成必須保留此段聲明，且在文章頁面明顯位置給出原文鏈接，不然保留追究法律責任的權利。

開發winform中，平時常常用到數據列表，咱們大多選用datagridview，可是此控件自己沒有排序的功能。參閱網上資料。留下標記，之後備用。

datagridview的數據顯示通常是經過數據綁定來實現，

 即：this.datagridview.DataSource=this.bindingSrc;

      this.bindingSrc.DataSource=this.Model;

 

這種形式就完成了，數據的顯示過程。可是要實現點擊datagridview實現排序的功能，須要實現對數據源排序的功能。具體代碼以下：

 

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public class SortableBindingList<T> : BindingList<T>      {          private bool isSortedCore = true ;          private ListSortDirection sortDirectionCore = ListSortDirection.Ascending;          private PropertyDescriptor sortPropertyCore = null ;          private string defaultSortItem;            public SortableBindingList() : base () { }            public SortableBindingList(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());          }      }

 實現此類後，就能夠經過 this.bindingSrc.DataSource=new SortableBindingList<CnsDetailReport>(this.Model); 直接在給datagridview數據源綁定值時加上便可，無需其餘設置 。

實現點擊列標題排序的目的了。