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public class CustomComparer : IComparer<object>, ISortDirection
{
private ListSortDirection
_SortDirection;
/// <summary>
/// Gets or sets the property that denotes the sort
direction.
/// </summary>
/// <remarks>
/// SortDirection gets updated only when sorting the
groups. For other cases, SortDirection is always ascending.
/// </remarks>
public ListSortDirection SortDirection
{
get { return _SortDirection; }
set { _SortDirection = value; }
}
public int Compare(object x, object y)
{
int nameX;
int nameY;
//While data object passed to comparer
if (x.GetType() == typeof(OrderInfo))
{
nameX =
((OrderInfo)x).Order;
nameY =
((OrderInfo)y).Order;
}
//While sorting groups
else if (x.GetType() == typeof(Group))
{
//here customize based on your scenario
var getXBottomGroup = CheckGroupX(x as Group);
var getYBottomGroup = CheckGroupY(y as Group);
int xProductId = -1;
int yProductId = -1;
if (getXBottomGroup.Records != null)
{
foreach (var record in getXBottomGroup.Records)
{
//here get the which column should sorted in SfDataGrid
xProductId = (record.Data as OrderInfo).Order;
}
}
if (getYBottomGroup.Records != null)
{
foreach (var record in
getYBottomGroup.Records)
{
//here get the which column should sorted in SfDataGrid
yProductId = (record.Data as OrderInfo).Order;
}
}
//Calculating the group key length
nameX =
xProductId;
nameY =
yProductId;
}
else
{
nameX = (int)x;
nameY = (int)y;
}
//returns the comparison result based in SortDirection.
if (nameX.CompareTo(nameY) > 0)
return SortDirection ==
ListSortDirection.Ascending ? 1 : -1;
else if (nameX.CompareTo(nameY)
== -1)
return SortDirection ==
ListSortDirection.Ascending ? -1 : 1;
else
return 0;
}
private Group CheckGroupY(Group group)
{
//Check whether the group is null or not
if (group != null && group.Groups != null)
{
//if more than one group is achieved ,you need to check those
levels and get the records
foreach (var gr in group?.Groups)
{
if (gr.IsBottomLevel)
return gr;
else
//Called recursively , to traverse it inner level of group.
return CheckGroupY(gr);
}
}
return group;
}
private Group CheckGroupX(Group group)
{
//Check whether the group is null or not
if (group != null && group.Groups != null)
{
//if more than one group is achieved ,you need to check those
levels and get the records
foreach (var gr in group?.Groups)
{
if (gr.IsBottomLevel)
return gr;
else
//Called recursively , to traverse it inner level of group.
return CheckGroupX(gr);
}
}
return group;
}
}
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