c# listview 排序

来源：互联网发布：mba智库百科知乎编辑：程序博客网时间：2024/06/06 18:12

            this.lvTaskList.ListViewItemSorter = new ListViewColumnSorter();            this.lvTaskList.ColumnClick += new ColumnClickEventHandler(ListViewHelper.ListView_ColumnClick);

 #region 列表排序类        /// <summary>        /// 对ListView点击列标题自动排序功能        /// </summary>        public class ListViewHelper        {            /// <summary>            /// 构造函数            /// </summary>            public ListViewHelper()            {                //                // TODO: 在此处添加构造函数逻辑                //            }            public static void ListView_ColumnClick(object sender, System.Windows.Forms.ColumnClickEventArgs e)            {                System.Windows.Forms.ListView lv = sender as System.Windows.Forms.ListView;                // 检查点击的列是不是现在的排序列.                if (e.Column == (lv.ListViewItemSorter as ListViewColumnSorter).SortColumn)                {                    // 重新设置此列的排序方法.                    if ((lv.ListViewItemSorter as ListViewColumnSorter).Order == System.Windows.Forms.SortOrder.Ascending)                    {                        (lv.ListViewItemSorter as ListViewColumnSorter).Order = System.Windows.Forms.SortOrder.Descending;                    }                    else                    {                        (lv.ListViewItemSorter as ListViewColumnSorter).Order = System.Windows.Forms.SortOrder.Ascending;                    }                }                else                {                    // 设置排序列，默认为正向排序                    (lv.ListViewItemSorter as ListViewColumnSorter).SortColumn = e.Column;                    (lv.ListViewItemSorter as ListViewColumnSorter).Order = System.Windows.Forms.SortOrder.Ascending;                }                // 用新的排序方法对ListView排序                ((System.Windows.Forms.ListView)sender).Sort();            }        }        /// <summary>        /// 继承自IComparer        /// </summary>        public class ListViewColumnSorter : System.Collections.IComparer        {            /// <summary>            /// 指定按照哪个列排序            /// </summary>            private int ColumnToSort;            /// <summary>            /// 指定排序的方式            /// </summary>            private System.Windows.Forms.SortOrder OrderOfSort;            /// <summary>            /// 声明CaseInsensitiveComparer类对象            /// </summary>            private System.Collections.CaseInsensitiveComparer ObjectCompare;            /// <summary>            /// 构造函数            /// </summary>            public ListViewColumnSorter()            {                // 默认按第一列排序                ColumnToSort = 0;                // 排序方式为不排序                OrderOfSort = System.Windows.Forms.SortOrder.None;                // 初始化CaseInsensitiveComparer类对象                ObjectCompare = new System.Collections.CaseInsensitiveComparer();            }            /// <summary>            /// 重写IComparer接口.            /// </summary>            /// <param name="x">要比较的第一个对象</param>            /// <param name="y">要比较的第二个对象</param>            /// <returns>比较的结果.如果相等返回0，如果x大于y返回1，如果x小于y返回-1</returns>            public int Compare(object x, object y)            {                int compareResult;                System.Windows.Forms.ListViewItem listviewX, listviewY;                // 将比较对象转换为ListViewItem对象                listviewX = (System.Windows.Forms.ListViewItem)x;                listviewY = (System.Windows.Forms.ListViewItem)y;                string xText = listviewX.SubItems[ColumnToSort].Text;                string yText = listviewY.SubItems[ColumnToSort].Text;                int xInt, yInt;                // 比较,如果值为IP地址，则根据IP地址的规则排序。                if (IsIP(xText) && IsIP(yText))                {                    compareResult = CompareIp(xText, yText);                }                else if (int.TryParse(xText, out xInt) && int.TryParse(yText, out yInt)) //是否全为数字                {                    //比较数字                    compareResult = CompareInt(xInt, yInt);                }                else                {                    //比较对象                    compareResult = ObjectCompare.Compare(xText, yText);                }                // 根据上面的比较结果返回正确的比较结果                if (OrderOfSort == System.Windows.Forms.SortOrder.Ascending)                {                    // 因为是正序排序，所以直接返回结果                    return compareResult;                }                else if (OrderOfSort == System.Windows.Forms.SortOrder.Descending)                {                    // 如果是反序排序，所以要取负值再返回                    return (-compareResult);                }                else                {                    // 如果相等返回0                    return 0;                }            }            /// <summary>            /// 判断是否为正确的IP地址，IP范围（0.0.0.0～255.255.255）            /// </summary>            /// <param name="ip">需验证的IP地址</param>            /// <returns></returns>            public bool IsIP(String ip)            {                return System.Text.RegularExpressions.Regex.Match(ip, @"^(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])$").Success;            }            /// <summary>            /// 比较两个数字的大小            /// </summary>            /// <param name="ipx">要比较的第一个对象</param>            /// <param name="ipy">要比较的第二个对象</param>            /// <returns>比较的结果.如果相等返回0，如果x大于y返回1，如果x小于y返回-1</returns>            private int CompareInt(int x, int y)            {                if (x > y)                {                    return 1;                }                else if (x < y)                {                    return -1;                }                else                {                    return 0;                }            }            /// <summary>            /// 比较两个IP地址的大小            /// </summary>            /// <param name="ipx">要比较的第一个对象</param>            /// <param name="ipy">要比较的第二个对象</param>            /// <returns>比较的结果.如果相等返回0，如果x大于y返回1，如果x小于y返回-1</returns>            private int CompareIp(string ipx, string ipy)            {                string[] ipxs = ipx.Split('.');                string[] ipys = ipy.Split('.');                for (int i = 0; i < 4; i++)                {                    if (Convert.ToInt32(ipxs[i]) > Convert.ToInt32(ipys[i]))                    {                        return 1;                    }                    else if (Convert.ToInt32(ipxs[i]) < Convert.ToInt32(ipys[i]))                    {                        return -1;                    }                    else                    {                        continue;                    }                }                return 0;            }            /// <summary>            /// 获取或设置按照哪一列排序.            /// </summary>            public int SortColumn            {                set                {                    ColumnToSort = value;                }                get                {                    return ColumnToSort;                }            }            /// <summary>            /// 获取或设置排序方式.            /// </summary>            public System.Windows.Forms.SortOrder Order            {                set                {                    OrderOfSort = value;                }                get                {                    return OrderOfSort;                }            }        }        #endregion

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