ListView排序

最新推荐文章于 2019-07-21 23:01:31 发布

原创最新推荐文章于 2019-07-21 23:01:31 发布 · 1k 阅读

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#listview #object #class

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本文介绍了一种自定义ListView排序的方法，通过实现IComparer接口并重写Compare方法来完成多级排序功能，适用于需要对ListView项进行复杂排序逻辑的应用场景。

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ListViewSorter listviewSort = new ListViewSorter();

this.lsv1.ListViewItemSorter = listviewSort;

this.lsv1.Sort();

    class ListViewSorter : IComparer
    {
        private int columnToSort;
        private System.Windows.Forms.SortOrder sortKind ;
        private int columnNumbers ;
        public ListViewSorter()
             {
                  columnToSort= 0;
                  sortKind = System.Windows.Forms.SortOrder.Ascending;
              }
        public int Compare(object x, object y)
        {
            int compareResult;
            ListViewItem listviewX, listviewY;
            listviewX = (ListViewItem)x;
            listviewY = (ListViewItem)y;
            //第一項目排序

            object[] x0Value = (object[])listviewX.SubItems[columnToSort].Tag;
            object[] y0Value = (object[])listviewY.SubItems[columnToSort].Tag;
            compareResult = string.CompareOrdinal(Convert.ToString(x0Value[2]), Convert.ToString(y0Value[2]));
            if (compareResult == 0)
            {
                 compareResult = string.CompareOrdinal(Convert.ToString(x0Value[0]), Convert.ToString(y0Value[0]));
                if (compareResult == 0)
                {
                    compareResult = string.CompareOrdinal(Convert.ToString(x0Value[3]), Convert.ToString(y0Value[3]));
                }
            }
            //第一項目相同时

            if (compareResult == 0 && (columnNumbers == 1 || columnNumbers == 2))
            {
                // 第二項目排序

                object[] x1Value = (object[])listviewX.SubItems[columnToSort+ 1].Tag;
                object[] y1Value = (object[])listviewY.SubItems[columnToSort+ 1].Tag;
                compareResult = string.CompareOrdinal(Convert.ToString(x1Value[2]), Convert.ToString(y1Value[2]));
                if (compareResult == 0)
                {
                   compareResult = string.CompareOrdinal(Convert.ToString(x1Value[0]), Convert.ToString(y1Value[0]));
                    if (compareResult == 0)
                    {
                   compareResult = string.CompareOrdinal(Convert.ToString(x1Value[3]), Convert.ToString(y1Value[3]));
                    }
                }
                //第二項目相同时

                if (compareResult == 0 && columnNumbers == 2)
                {
                    // 第三項目排序

                    object[] x2Value = (object[])listviewX.SubItems[columnToSort+ 2].Tag;
                    object[] y2Value = (object[])listviewY.SubItems[columnToSort+ 2].Tag;
                    compareResult = string.CompareOrdinal(Convert.ToString(x2Value[2]), Convert.ToString(y2Value[2]));
                    if (compareResult == 0)
                    {
                    compareResult = string.CompareOrdinal(Convert.ToString(x2Value[0]), Convert.ToString(y2Value[0]));
                        if (compareResult == 0)
                        {
                    compareResult = string.CompareOrdinal(Convert.ToString(x2Value[3]), Convert.ToString(y2Value[3]));
                        }
                    }
                }
            }
            if (sortKind == System.Windows.Forms.SortOrder.Ascending)
            {
                return compareResult;
            }
            else if (sortKind == System.Windows.Forms.SortOrder.Descending)
            {
                return (-compareResult);
            }
        }

        public int Columnnumbers
        {
            set
            {
                columnNumbers = value;
            }
        }
    }