trunk/RomCheater.Core/ListViewColumnSorter.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.Windows.Forms;

namespace RomCheater.Core
{
    /// <summary>
    /// This class is an implementation of the 'IComparer' interface.
    /// </summary>
    public class ListViewColumnSorter : IComparer
    {
        /// <summary>
        /// Specifies the column to be sorted
        /// </summary>
        private int ColumnToSort;
        /// <summary>
        /// Specifies the order in which to sort (i.e. 'Ascending').
        /// </summary>
        private SortOrder OrderOfSort;
        /// <summary>
        /// Case insensitive comparer object
        /// </summary>
        private CaseInsensitiveComparer ObjectCompare;

        /// <summary>
        /// Class constructor.  Initializes various elements
        /// </summary>
        public ListViewColumnSorter()
        {
            // Initialize the column to '0'
            ColumnToSort = 0;

            // Initialize the sort order to 'none'
            OrderOfSort = SortOrder.None;

            // Initialize the CaseInsensitiveComparer object
            ObjectCompare = new CaseInsensitiveComparer();
        }

        /// <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
            compareResult = ObjectCompare.Compare(listviewX.SubItems[ColumnToSort].Text, listviewY.SubItems[ColumnToSort].Text);

            // 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;
            }
        }

        /// <summary>
        /// Gets or sets the number of the column to which to apply the sorting operation (Defaults to '0').
        /// </summary>
        public int SortColumn
        {
            set
            {
                ColumnToSort = value;
            }
            get
            {
                return ColumnToSort;
            }
        }

        /// <summary>
        /// Gets or sets the order of sorting to apply (for example, 'Ascending' or 'Descending').
        /// </summary>
        public SortOrder Order
        {
            set
            {
                OrderOfSort = value;
            }
            get
            {
                return OrderOfSort;
            }
        }

    }
}
1	using System;
2	using System.Collections.Generic;
3	using System.Linq;
4	using System.Text;
5	using System.Collections;
6	using System.Windows.Forms;
7
8	namespace RomCheater.Core
9	{
10	/// <summary>
11	/// This class is an implementation of the 'IComparer' interface.
12	/// </summary>
13	public class ListViewColumnSorter : IComparer
14	{
15	/// <summary>
16	/// Specifies the column to be sorted
17	/// </summary>
18	private int ColumnToSort;
19	/// <summary>
20	/// Specifies the order in which to sort (i.e. 'Ascending').
21	/// </summary>
22	private SortOrder OrderOfSort;
23	/// <summary>
24	/// Case insensitive comparer object
25	/// </summary>
26	private CaseInsensitiveComparer ObjectCompare;
27
28	/// <summary>
29	/// Class constructor. Initializes various elements
30	/// </summary>
31	public ListViewColumnSorter()
32	{
33	// Initialize the column to '0'
34	ColumnToSort = 0;
35
36	// Initialize the sort order to 'none'
37	OrderOfSort = SortOrder.None;
38
39	// Initialize the CaseInsensitiveComparer object
40	ObjectCompare = new CaseInsensitiveComparer();
41	}
42
43	/// <summary>
44	/// This method is inherited from the IComparer interface. It compares the two objects passed using a case insensitive comparison.
45	/// </summary>
46	/// <param name="x">First object to be compared</param>
47	/// <param name="y">Second object to be compared</param>
48	/// <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>
49	public int Compare(object x, object y)
50	{
51	int compareResult;
52	ListViewItem listviewX, listviewY;
53
54	// Cast the objects to be compared to ListViewItem objects
55	listviewX = (ListViewItem)x;
56	listviewY = (ListViewItem)y;
57
58	// Compare the two items
59	compareResult = ObjectCompare.Compare(listviewX.SubItems[ColumnToSort].Text, listviewY.SubItems[ColumnToSort].Text);
60
61	// Calculate correct return value based on object comparison
62	if (OrderOfSort == SortOrder.Ascending)
63	{
64	// Ascending sort is selected, return normal result of compare operation
65	return compareResult;
66	}
67	else if (OrderOfSort == SortOrder.Descending)
68	{
69	// Descending sort is selected, return negative result of compare operation
70	return (-compareResult);
71	}
72	else
73	{
74	// Return '0' to indicate they are equal
75	return 0;
76	}
77	}
78
79	/// <summary>
80	/// Gets or sets the number of the column to which to apply the sorting operation (Defaults to '0').
81	/// </summary>
82	public int SortColumn
83	{
84	set
85	{
86	ColumnToSort = value;
87	}
88	get
89	{
90	return ColumnToSort;
91	}
92	}
93
94	/// <summary>
95	/// Gets or sets the order of sorting to apply (for example, 'Ascending' or 'Descending').
96	/// </summary>
97	public SortOrder Order
98	{
99	set
100	{
101	OrderOfSort = value;
102	}
103	get
104	{
105	return OrderOfSort;
106	}
107	}
108
109	}
110	}