如何按列在 Visual C# 排序 ListView 控件

ObjectCompare.Compare(listviewX.SubItems[ColumnToSort].Text,listviewY.SubItems[ColumnToSort].Text);
				

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如何生成示例项目

1. 创建新的 Visual C# Windows 应用程序项目。 默认情况下会创建 Form 1。
2. 向 Form 1 中添加 ListView 控件。 大小窗体是几个英寸高的几个英寸宽。
3. 将以下代码粘贴到窗体类：

   private ListViewColumnSorter lvwColumnSorter;
   					

4. 下面的代码粘贴表单的构造函数调用 InitializeComponent 方法后：

   // Create an instance of a ListView column sorter and assign it 
   // to the ListView control.
   lvwColumnSorter = new ListViewColumnSorter();
   this.listView1.ListViewItemSorter = lvwColumnSorter;
   					

5. 将以下代码粘贴到窗体的 Load 事件：

   ColumnHeader columnheader;		// Used for creating column headers.
   ListViewItem listviewitem;		// Used for creating listview items.
   
   // Ensure that the view is set to show details.
   listView1.View = View.Details;
   
   // Create some listview items consisting of first and last names.
   listviewitem = new ListViewItem("John");
   listviewitem.SubItems.Add("Smith");
   this.listView1.Items.Add(listviewitem);
   
   listviewitem = new ListViewItem("Bob");
   listviewitem.SubItems.Add("Taylor");
   this.listView1.Items.Add(listviewitem);
   
   listviewitem = new ListViewItem("Kim");
   listviewitem.SubItems.Add("Zimmerman");
   this.listView1.Items.Add(listviewitem);
   
   listviewitem = new ListViewItem("Olivia");
   listviewitem.SubItems.Add("Johnson");
   this.listView1.Items.Add(listviewitem);
   			            
   // Create some column headers for the data. 
   columnheader = new ColumnHeader();
   columnheader.Text = "First Name";
   this.listView1.Columns.Add(columnheader);
   
   columnheader = new ColumnHeader();
   columnheader.Text = "Last Name";
   this.listView1.Columns.Add(columnheader);
   
   // Loop through and size each column header to fit the column header text.
   foreach (ColumnHeader ch in this.listView1.Columns)
   {			
   	ch.Width = -2;
   }
   					

   程序代码应更改 Visual Studio 2005 中的 注释 。 Visual C# 创建 Windows 窗体项目时, 一个窗体向项目添加默认情况下。 此窗体被命名为 Form 1。 在两个文件，表示该窗体名 Form 1.cs 和 Form 1.designer.cs。 您在 Form 1.cs 中编写代码。 Designer.cs 文件是在 Windows 窗体设计器写入实现所有操作的代码由添加控件。 有关中 Visual C# 2005 在 Windows 窗体设计器的详细信息，请访问下面的 Microsoft Web 站点：
   http://msdn2.microsoft.com/en-us/library/ms173077.aspx (http://msdn2.microsoft.com/en-us/library/ms173077.aspx)
6. 将以下代码粘贴到 ListView 控件的 ColumnClick 事件：

   // Determine if clicked column is already the column that is being sorted.
   if ( e.Column == lvwColumnSorter.SortColumn )
   {
   	// Reverse the current sort direction for this column.
   	if (lvwColumnSorter.Order == SortOrder.Ascending)
   	{
   		lvwColumnSorter.Order = SortOrder.Descending;
   	}
   	else
   	{
   		lvwColumnSorter.Order = SortOrder.Ascending;
   	}
   }
   else
   {
   	// Set the column number that is to be sorted; default to ascending.
   	lvwColumnSorter.SortColumn = e.Column;
   	lvwColumnSorter.Order = SortOrder.Ascending;
   }
   
   // Perform the sort with these new sort options.
   this.listView1.Sort();
   					

7. 在 项目 菜单中上, 单击 添加类 将一个新类添加到项目。
8. 所有新的类中的默认代码替换为下面的代码：

   using System.Collections;	
   using System.Windows.Forms;
   
   /// <summary>
   /// This class is an implementation of the 'IComparer' interface.
   /// </summary>
   public class ListViewColumnSorter : IComparer
   {
   	/// <summary>
   	/// Specifies the column to be sorted
   	/// </summary>
   	private int ColumnToSort;
   	/// <summary>
   	/// Specifies the order in which to sort (i.e. 'Ascending').
   	/// </summary>
   	private SortOrder OrderOfSort;
   	/// <summary>
   	/// Case insensitive comparer object
   	/// </summary>
   	private CaseInsensitiveComparer ObjectCompare;
   
   	/// <summary>
   	/// Class constructor.  Initializes various elements
   	/// </summary>
   	public ListViewColumnSorter()
   	{
   		// Initialize the column to '0'
   		ColumnToSort = 0;
   
   		// Initialize the sort order to 'none'
   		OrderOfSort = SortOrder.None;
   
   		// Initialize the CaseInsensitiveComparer object
   		ObjectCompare = new CaseInsensitiveComparer();
   	}
   
   	/// <summary>
   	/// This method is inherited from the IComparer interface.  It compares the two objects passed using a case insensitive comparison.
   	/// </summary>
   	/// <param name="x">First object to be compared</param>
   	/// <param name="y">Second object to be compared</param>
   	/// <returns>The result of the comparison. "0" if equal, negative if 'x' is less than 'y' and positive if 'x' is greater than 'y'</returns>
   	public int Compare(object x, object y)
   	{
   		int compareResult;
   		ListViewItem listviewX, listviewY;
   
   		// Cast the objects to be compared to ListViewItem objects
   		listviewX = (ListViewItem)x;
   		listviewY = (ListViewItem)y;
   
   		// Compare the two items
   		compareResult = ObjectCompare.Compare(listviewX.SubItems[ColumnToSort].Text,listviewY.SubItems[ColumnToSort].Text);
   			
   		// Calculate correct return value based on object comparison
   		if (OrderOfSort == SortOrder.Ascending)
   		{
   			// Ascending sort is selected, return normal result of compare operation
   			return compareResult;
   		}
   		else if (OrderOfSort == SortOrder.Descending)
   		{
   			// Descending sort is selected, return negative result of compare operation
   			return (-compareResult);
   		}
   		else
   		{
   			// Return '0' to indicate they are equal
   			return 0;
   		}
   	}
       
   	/// <summary>
   	/// Gets or sets the number of the column to which to apply the sorting operation (Defaults to '0').
   	/// </summary>
   	public int SortColumn
   	{
   		set
   		{
   			ColumnToSort = value;
   		}
   		get
   		{
   			return ColumnToSort;
   		}
   	}
   
   	/// <summary>
   	/// Gets or sets the order of sorting to apply (for example, 'Ascending' or 'Descending').
   	/// </summary>
   	public SortOrder Order
   	{
   		set
   		{
   			OrderOfSort = value;
   		}
   		get
   		{
   			return OrderOfSort;
   		}
   	}
       
   }
   					

9. 保存、 生成，然后运行示例项目。
10. 单击不同的列标题， ListView 控件中。 当您单击标题时， ListView 控件的内容是按基于您单击的列的升序顺序排序的。 再次单击同一个列标题时是按降序排序列。

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