private void lvwColumnSorter_CompareItems(object sender, ListViewColumnSorterCompareEventArgs e)
{
var comparer = listViewResults.Columns[e.Column].Tag as IComparer<SearchFileInfo>;
if (comparer == null)
return;
e.CompareResult = comparer.Compare((SearchFileInfo)e.ItemX.Tag, (SearchFileInfo)e.ItemY.Tag);
}
/// <summary>
/// This method is inherited from the IComparer interface. It compares the two objects passed using a case insensitive comparison.
/// </summary>
/// <param name="x">First object to be compared</param>
/// <param name="y">Second object to be compared</param>
/// <returns>The result of the comparison. "0" if equal, negative if 'x' is less than 'y' and positive if 'x' is greater than 'y'</returns>
public int Compare(object x, object y)
{
int compareResult;
ListViewItem listviewX, listviewY;
// Cast the objects to be compared to ListViewItem objects
listviewX = (ListViewItem)x;
listviewY = (ListViewItem)y;
// Compare the two items
if (CompareItems == null)
{
compareResult = ObjectCompare.Compare(listviewX.SubItems[ColumnToSort].Text, listviewY.SubItems[ColumnToSort].Text);
}
else
{
ListViewColumnSorterCompareEventArgs e = new ListViewColumnSorterCompareEventArgs();
e.ItemX = listviewX;
e.ItemY = listviewY;
e.Column = ColumnToSort;
CompareItems(this, e);
compareResult = e.CompareResult;
}
// Calculate correct return value based on object comparison
if (OrderOfSort == SortOrder.Ascending)
{
// Ascending sort is selected, return normal result of compare operation
return compareResult;
}
else if (OrderOfSort == SortOrder.Descending)
{
// Descending sort is selected, return negative result of compare operation
return (-compareResult);
}
else
{
// Return '0' to indicate they are equal
return 0;
}
}
private void lvwColumnSorter_CompareItems(object sender, ListViewColumnSorterCompareEventArgs e)
{
if (e.Column != 2)
{
e.CompareResult = string.Compare(e.ItemX.SubItems[e.Column].Text, e.ItemY.SubItems[e.Column].Text, true);
}
else
{
SearchFileInfo infoX = (SearchFileInfo)e.ItemX.Tag;
SearchFileInfo infoY = (SearchFileInfo)e.ItemY.Tag;
e.CompareResult = DateTime.Compare(infoX.LastWriteTime, infoY.LastWriteTime);
}
}
