92 lines
2.7 KiB
C#
92 lines
2.7 KiB
C#
// Copyright Epic Games, Inc. All Rights Reserved.
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms; // SortOrder
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namespace ImageValidator
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{
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// Compares two ListView items based on a selected column.
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// from http://csharphelper.com/blog/2014/09/sort-a-listview-using-the-column-you-click-in-c
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public class ListViewComparer : System.Collections.IComparer
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{
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private int ColumnNumber;
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private SortOrder SortOrder;
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public ListViewComparer(int column_number,
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SortOrder sort_order)
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{
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ColumnNumber = column_number;
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SortOrder = sort_order;
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}
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// Compare two ListViewItems.
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public int Compare(object object_x, object object_y)
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{
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// Get the objects as ListViewItems.
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ListViewItem item_x = object_x as ListViewItem;
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ListViewItem item_y = object_y as ListViewItem;
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// Get the corresponding sub-item values.
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string string_x;
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if (item_x.SubItems.Count <= ColumnNumber)
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{
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string_x = "";
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}
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else
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{
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string_x = item_x.SubItems[ColumnNumber].Text;
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}
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string string_y;
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if (item_y.SubItems.Count <= ColumnNumber)
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{
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string_y = "";
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}
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else
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{
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string_y = item_y.SubItems[ColumnNumber].Text;
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}
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// Compare them.
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int result;
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double double_x, double_y;
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if (double.TryParse(string_x, out double_x) &&
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double.TryParse(string_y, out double_y))
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{
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// Treat as a number.
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result = double_x.CompareTo(double_y);
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}
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else
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{
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DateTime date_x, date_y;
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if (DateTime.TryParse(string_x, out date_x) &&
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DateTime.TryParse(string_y, out date_y))
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{
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// Treat as a date.
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result = date_x.CompareTo(date_y);
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}
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else
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{
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// Treat as a string.
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result = string_x.CompareTo(string_y);
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}
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}
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// Return the correct result depending on whether
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// we're sorting ascending or descending.
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if (SortOrder == SortOrder.Ascending)
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{
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return result;
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}
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else
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{
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return -result;
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}
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}
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}
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}
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