有关组件的问题?

Question

做一个组件，它继承于ListView控件，实现如下的特殊功能，当点击列表字段时重新按此字段进行数据源排序，怎么做？大家讲一下思路？

Answer 1

  private System.Windows.Forms.ContextMenuStrip Save;
  private System.Windows.Forms.ToolStripMenuItem saveas; 
public DEGrid()
        {
            InitializeComponent();
            
            Save = new ContextMenuStrip();
            saveas = new ToolStripMenuItem("Save as");
            saveas.Font = Consts.MyFont;
            saveas.Click += new EventHandler(saveas_Click);
            Save.Items.Add(saveas);
            this.ContextMenuStrip = Save;
        }
   void saveas_Click(object sender, EventArgs e)
        {
            OperationGrid opg = new OperationGrid(this);
            opg.SaveAsExcel();
        }这是我封装的鼠标右键操作.你可以封装成鼠标左键的,在saveas_Click方法里写排序操作

Answer 2

//以下代码示例完整来自于MSDN本地帮助的一个关于ListView的排序示例,
一起学习;不过这不Winform是 XAML程序
(ListView,个人感觉比较复杂,我都很少用它)using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Collections;
using System.Windows.Controls.Primitives;
using System.ComponentModel;
using System.Windows.Data;namespace ListViewSort
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    //<Snippet6>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }        GridViewColumnHeader _lastHeaderClicked = null;
        ListSortDirection _lastDirection = ListSortDirection.Ascending;        void GridViewColumnHeaderClickedHandler(object sender,
                                                RoutedEventArgs e)
        {
            GridViewColumnHeader headerClicked =
                  e.OriginalSource as GridViewColumnHeader;
            ListSortDirection direction;            if (headerClicked != null)
            {
                if (headerClicked.Role != GridViewColumnHeaderRole.Padding)
                {
                    if (headerClicked != _lastHeaderClicked)
                    {
                        direction = ListSortDirection.Ascending;
                    }
                    else
                    {
                        if (_lastDirection == ListSortDirection.Ascending)
                        {
                            direction = ListSortDirection.Descending;
                        }
                        else
                        {
                            direction = ListSortDirection.Ascending;
                        }
                    }                    string header = headerClicked.Column.Header as string;
                    Sort(header, direction);                    if (direction == ListSortDirection.Ascending)
                    {
                        headerClicked.Column.HeaderTemplate =
                          Resources["HeaderTemplateArrowUp"] as DataTemplate;
                    }
                    else
                    {
                        headerClicked.Column.HeaderTemplate =
                          Resources["HeaderTemplateArrowDown"] as DataTemplate;
                    }                    // Remove arrow from previously sorted header
                    if (_lastHeaderClicked != null && _lastHeaderClicked != headerClicked)
                    {
                        _lastHeaderClicked.Column.HeaderTemplate = null;
                    }
                    _lastHeaderClicked = headerClicked;
                    _lastDirection = direction;
                }
            }
        }
        //</Snippet6>
        //<Snippet5>
        private void Sort(string sortBy, ListSortDirection direction)
        {
            ICollectionView dataView =
              CollectionViewSource.GetDefaultView(lv.ItemsSource);            dataView.SortDescriptions.Clear();
            SortDescription sd = new SortDescription(sortBy, direction);
            dataView.SortDescriptions.Add(sd);
            dataView.Refresh();
        }
        //</Snippet5>
    }
}