使用控件ListView顯示某個目錄下所有文件的一些屬性，點擊控件頭可實現排序
獲取目錄信息使用類DirectoryInfo，獲取文件信息使用類FileInfo
添加表頭的代碼如下所示：
private void Form1_Load(object sender, EventArgs e)
{
listView1.Columns.Add("File Name", 60, HorizontalAlignment.Left); //一步添加
listView1.Columns.Add("創建日期", 120, HorizontalAlignment.Left);
listView1.Columns.Add("修改日期", 120, HorizontalAlignment.Left);
listView1.Columns.Add("大小", 120, HorizontalAlignment.Left);
ListViewShow();
}讀取文件信息以及寫入ListView控件的方法，注意裏面涉及到時間轉自定義格式字符創的方法
private void ListViewShow()
{
//string[] fileNames = GetFileNames(@"C:\Users\chen.liu\Desktop\文件\demo");
DirectoryInfo dir = new DirectoryInfo(@"C:\Users\chen.liu\Desktop\文件\demo");
FileInfo[] files = dir.GetFiles(); // 獲取所有文件信息。。
listView1.FullRowSelect = true;//點擊某一行時整行選中
this.listView1.BeginUpdate(); //數據更新，UI暫時掛起，直到EndUpdate繪製控件，可以有效避免閃爍並大大提高加載速度
foreach (FileInfo file in files)
{
ListViewItem lvi = new ListViewItem();
lvi.Text = file.Name;
lvi.SubItems.Add(file.CreationTime.ToString("yyyy-MM-dd HH:mm:ss"));//獲取創建日期
lvi.SubItems.Add(file.LastWriteTime.ToString("yyyy-MM-dd HH:mm:ss"));//獲取最近一次修改日期
lvi.SubItems.Add((file.Length/1024).ToString() + "KB");//獲取文件大小
this.listView1.Items.Add(lvi);
}
this.listView1.EndUpdate(); //結束數據處理，UI界面一次性繪製。
}然後實現點擊列表頭即排序的實現方法
首先自定義一個接口類，注意裏面Compare方法的實現，使用catch實現對多種不同數據類型的排序
/// <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);
try
{
compareResult = ObjectCompare.Compare(DateTime.ParseExact(listviewX.SubItems[ColumnToSort].Text, "yyyy-MM-dd HH:mm:ss", null), DateTime.ParseExact((listviewY.SubItems[ColumnToSort].Text), "yyyy-MM-dd HH:mm:ss", null));//時間比較
}
catch
{
try { compareResult = ObjectCompare.Compare(int.Parse((listviewX.SubItems[ColumnToSort].Text).TrimEnd('K', 'B')), int.Parse((listviewY.SubItems[ColumnToSort].Text).TrimEnd('K', 'B'))); }//整形比較,去掉尾部的"KB"
catch { 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;
}
}
}聲明該接口
private ListViewColumnSorter lvwColumnSorter;//聲明一個比較器接口 // Create an instance of a ListView column sorter and assign it
// to the ListView control.
lvwColumnSorter = new ListViewColumnSorter();
this.listView1.ListViewItemSorter = lvwColumnSorter;//設置比較器的接口點擊列表頭觸發排序操作
private void listView1_ColumnClick(object sender, ColumnClickEventArgs e)
{
// Determine if clicked column is already the column that is being sorted.
if (e.Column == lvwColumnSorter.SortColumn)//切換排序方式，遞增or遞減
{
// 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();
}
}