How to make the Date columns in PivotGrid to sort according to Date chronological order
We have added a new “DateComparer” class which implements the IComparer Interface in which the dates gets compared and sorted according to the Format specified. And this Comparer should be included to a specific Pivot Item (i.e., Pivot Item which has “DateTime” field as FieldMappingName), so that the dates gets sorted accordingly.
Please refer the below code snippet which shows the “DateComparer” class.
C#
public class DateComparer : IComparer { Dictionary<string, int> lookUp = null; string fmt = string.Empty; public DateComparer(string format) { fmt = string.Format("{0}", format); lookUp = new Dictionary<string, int>(); DateTime dt0 = Convert.ToDateTime("2013/12/01"); DateTime dt1 = Convert.ToDateTime("2014/01/08"); double days = (dt1 - dt0).TotalDays; for (int j = 0; j <= days; j++) { DateTime dt = dt0.AddDays(j); if (!lookUp.ContainsKey(dt.ToString(fmt))) { lookUp.Add(dt.ToString(fmt), j); } } } public int Compare(object x, object y) { DateTime x1, y1; if (DateTime.TryParse(x.ToString(), out x1) && DateTime.TryParse(y.ToString(), out y1)) { x = x1.ToString(fmt); y = y1.ToString(fmt); } return lookUp[x.ToString()].CompareTo(lookUp[(y.ToString())]); } } |
