文件属性获取及控件ListView使用常用方法

使用控件ListView显示某个目录下所有文件的一些属性，点击控件头可实现排序

获取目录信息使用类DirectoryInfo，获取文件信息使用类FileInfo

添加表头的代码如下所示：

     private void Form1_Load(object sender, EventArgs e)        {            listView1.Columns.Add("File Name", 60, HorizontalAlignment.Left); //一步添加             listView1.Columns.Add("创建日期", 120, HorizontalAlignment.Left);            listView1.Columns.Add("修改日期", 120, HorizontalAlignment.Left);            listView1.Columns.Add("大小", 120, HorizontalAlignment.Left);                       ListViewShow();        }

读取文件信息以及写入ListView控件的方法，注意里面涉及到时间转自定义格式字符创的方法

     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(); // 获取所有文件信息。。            listView1.FullRowSelect = true;//点击某一行时整行选中            this.listView1.BeginUpdate();   //数据更新，UI暂时挂起，直到EndUpdate绘制控件，可以有效避免闪烁并大大提高加载速度              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"));//获取创建日期                lvi.SubItems.Add(file.LastWriteTime.ToString("yyyy-MM-dd HH:mm:ss"));//获取最近一次修改日期                lvi.SubItems.Add((file.Length/1024).ToString() + "KB");//获取文件大小                this.listView1.Items.Add(lvi);                            }            this.listView1.EndUpdate();  //结束数据处理，UI界面一次性绘制。          }

然后实现点击列表头即排序的实现方法

首先自定义一个接口类，注意里面Compare方法的实现，使用catch实现对多种不同数据类型的排序

 /// <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));//时间比较            }            catch             {                try { compareResult = ObjectCompare.Compare(int.Parse((listviewX.SubItems[ColumnToSort].Text).TrimEnd('K', 'B')), int.Parse((listviewY.SubItems[ColumnToSort].Text).TrimEnd('K', 'B'))); }//整形比较,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;            }        }    }

声明该接口

private ListViewColumnSorter lvwColumnSorter;//声明一个比较器接口

与ListView控件的排序接口做绑定

         // Create an instance of a ListView column sorter and assign it             // to the ListView control.            lvwColumnSorter = new ListViewColumnSorter();            this.listView1.ListViewItemSorter = lvwColumnSorter;//设置比较器的接口

点击列表头触发排序操作

        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)//切换排序方式，递增or递减            {                // 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();        }    }

需要注意接口的使用方法，该接口可与排序方法直接做绑定，然后在后面的使用中直接使用这个接口的声明即可