Question

我在DataGridView中有一个列，它包括以小时和分钟为单位的持续时间，如

125：40

问题是列是一个字符串，当用户将列排序为升序排序时，结果将是这样的

125：40

80:40

如何将此列排序为保留此格式的日期？

更新：如果我作为时间跨度来处理它，如何将时间跨度格式化为hhh：mm而不将其转换为字符串？

Answer 1

Using a custom formatter in a datagridview

getElements

Answer 2

我得到了答案我做了一个类实现IComparable

课程将

 class hhhmmCustomComparer : IComparable 
    {
        private static int sortOrderModifier = 1;
        private int columnIndex;
        public string stringValue;
        public hhhmmCustomComparer(int columnIndex, System.Windows.Forms.SortOrder sortOrder)
        {
            this.columnIndex = columnIndex;
            if (sortOrder == SortOrder.Descending)
            {
                sortOrderModifier = -1;
            }
            else if (sortOrder == SortOrder.Ascending)
            {
                sortOrderModifier = 1;
            }
        }

        public hhhmmCustomComparer(int hours, int Minutes)
        {
            stringValue = hours.ToString() + ":" + Minutes.ToString();

        }

        public int Compare(DataRow Row1, DataRow Row2)
        {
            int CompareResult = 0;

            if (String.IsNullOrEmpty(Row1[columnIndex].ToString()) && String.IsNullOrEmpty(Row2[columnIndex].ToString()))
            {
                return 0;


            }
            else if (String.IsNullOrEmpty(Row1[columnIndex].ToString()))
            {
                CompareResult = -1;
            }
            else if (String.IsNullOrEmpty(Row2[columnIndex].ToString()))
            {
                CompareResult = 1;//1 , -1
            }
            else
            {
                TimeSpan CellValue1 = new TimeSpan(int.Parse(Row1[columnIndex].ToString().Split(':')[0]), int.Parse(Row1[columnIndex].ToString().Split(':')[1]), 0);
                TimeSpan CellValue2 = new TimeSpan(int.Parse(Row2[columnIndex].ToString().Split(':')[0]), int.Parse(Row2[columnIndex].ToString().Split(':')[1]), 0);
                CompareResult = TimeSpan.Compare(CellValue1, CellValue2);

            }

            return CompareResult * sortOrderModifier;


        }

        public int Compare(object x, object y)
        {
            try
            {

                DataGridViewRow Row1 = (DataGridViewRow)x;
                DataGridViewRow Row2 = (DataGridViewRow)y;
                int CompareResult = 0;

                if (Row1.Index >= 0 && Row2.Index >= 0 && !String.IsNullOrEmpty(Row1.Cells[columnIndex].Value.ToString()) && !String.IsNullOrEmpty(Row2.Cells[columnIndex].Value.ToString()))
                {

                    TimeSpan CellValue1 = new TimeSpan(int.Parse(Row1.Cells[columnIndex].Value.ToString().Split(':')[0]), int.Parse(Row1.Cells[columnIndex].Value.ToString().Split(':')[1]), 0);
                    TimeSpan CellValue2 = new TimeSpan(int.Parse(Row2.Cells[columnIndex].Value.ToString().Split(':')[0]), int.Parse(Row2.Cells[columnIndex].Value.ToString().Split(':')[1]), 0);
                    CompareResult = TimeSpan.Compare(CellValue1, CellValue2);


                }
                return CompareResult * sortOrderModifier;
            }
            catch (Exception ex)
            {
                throw ex;
            }

        }

        public override string ToString()
        {
            return stringValue;
        }

        public int CompareTo(object obj)
        {
            var val1 = this.ToString();
            var val2 = obj.ToString();
            var CompareResult = 0;
            if (String.IsNullOrEmpty(val1) && String.IsNullOrEmpty(val2))
            {
                CompareResult = 0;


            }
            else if (String.IsNullOrEmpty(val1))
            {
                CompareResult = -1;
            }
            else if (String.IsNullOrEmpty(val2))
            {
                CompareResult = 1;//1 , -1
            }
            else
            {
                TimeSpan CellValue1 = new TimeSpan(int.Parse(val1.Split(':')[0]), int.Parse(val1.Split(':')[1]), 0);
                TimeSpan CellValue2 = new TimeSpan(int.Parse(val2.Split(':')[0]), int.Parse(val2.Split(':')[1]), 0);
                CompareResult = TimeSpan.Compare(CellValue1, CellValue2);

            }

            return CompareResult * sortOrderModifier;
            // throw new NotImplementedException();
        }


    }

然后在添加值时使其成为此类的实例像这样

row [＆＃34; myColumnName＆＃34;] = new hhhmmCustomComparer（（（x.Days * 24）+ x.Hours），x.Minutes）;

将dateTime格式化为hhh：mm，但将其用于排序

2 个答案: