[C#/WINFORM] ListView 클래스 : 컬럼 헤더 클릭시 정렬하기

using System;
using System.Collections;
using System.Windows.Forms;

/// <summary>
/// ListView 항목 비교자
/// </summary>
public class ListViewItemComparer : IComparer
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Field
    ////////////////////////////////////////////////////////////////////////////////////////// Private

    #region Field

    /// <summary>
    /// 컬럼 인덱스
    /// </summary>
    private int columnIndex;

    /// <summary>
    /// 정렬 순서
    /// </summary>
    private string sortOrder = "ASC";

    #endregion

    //////////////////////////////////////////////////////////////////////////////////////////////////// Property
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region 컬럼 인덱스 - ColumnIndex

    /// <summary>
    /// 컬럼 인덱스
    /// </summary>
    public int ColumnIndex
    {
        get
        {
            return this.columnIndex;
        }
        set
        {
            if(value < 0)
            {
                throw new ArgumentOutOfRangeException("value");
            }

            this.columnIndex = value;
        }
    }

    #endregion

    #region 정렬 순서 - SortOrder

    /// <summary>
    /// 정렬 순서
    /// </summary>
    public string SortOrder
    {
        get
        {
            return this.sortOrder;
        }
        set
        {
            string sortOrder = value.ToUpper();

            if(!sortOrder.Equals("ASC") && !sortOrder.Equals("DESC"))
            {
                throw new ArgumentOutOfRangeException("value");
            }

            this.sortOrder = sortOrder;
        }
    }

    #endregion

    //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region 생성자 - ListViewItemComparer()

    /// <summary>
    /// 생성자
    /// </summary>
    public ListViewItemComparer()
    {
        ColumnIndex = 0;
    }

    #endregion

    #region 생성자 - ListViewItemComparer(columnIndex, sortOrder)

    /// <summary>
    /// 생성자
    /// </summary>
    /// <param name="columnIndex">컬럼 인덱스</param>
    /// <param name="sortOrder">정렬 순서</param>
    public ListViewItemComparer(int columnIndex, string sortOrder)
    {
        ColumnIndex = columnIndex;
        SortOrder   = sortOrder;
    }

    #endregion

    //////////////////////////////////////////////////////////////////////////////////////////////////// Method
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region 비교하기 - Comparer(object1, object2)

    /// <summary>
    /// 비교하기
    /// </summary>
    /// <param name="object1">객체 1</param>
    /// <param name="object2">객체 2</param>
    /// <returns>처리 결과</returns>
    public int Comparer(object object1, object object2)
    {
        if(this.sortOrder.Equals("ASC"))
        {
            return string.Compare
            (
                ((ListViewItem)object1).SubItems[this.columnIndex].Text,
                ((ListViewItem)object2).SubItems[this.columnIndex].Text
            );
        }
        else
        {
            return string.Compare
            (
                ((ListViewItem)object2).SubItems[this.columnIndex].Text,
                ((ListViewItem)object1).SubItems[this.columnIndex].Text
            );
        }
    }

    #endregion
}

...

/// <summary>
/// 리스트 뷰
/// </summary>
private ListView listView;

...

this.listView.ColumnClick += listView_ColumnClick;

...

#region ListView 컬럼 클릭시 처리하기 - listView_ColumnClick(sender, e)

/// <summary>
/// ListView 컬럼 클릭시 처리하기
/// </summary>
/// <param name="sender">이벤트 발생자</param>
/// <param name="e">이벤트 인자</param>
private void listView_ColumnClick(object sender, ColumnClickEventArgs e)
{
    for(int i = 0; i < this.listView.Columns.Count; i++)
    {
        this.listView.Columns[i].Text = this.listView.Columns[i].Text.Replace(" ▽", string.Empty);
        this.listView.Columns[i].Text = this.listView.Columns[i].Text.Replace(" △", string.Empty);
    }

    if(this.listView.Sorting == SortOrder.Ascending || this.listView.Sorting == SortOrder.None)
    {
        this.listView.ListViewItemSorter = new ListViewItemComparer(e.Column, "DESC");

        this.listView.Sorting = SortOrder.Descending;

        this.listView.Columns[e.Column].Text = this.listView.Columns[e.Column].Text + " ▽";
    }
    else
    {
        this.listView.ListViewItemSorter = new ListViewItemComparer(e.Column, "ASC");

        this.listView.Sorting = SortOrder.Ascending;

        this.listView.Columns[e.Column].Text = this.listView.Columns[e.Column].Text + " △";
    }

    this.listView.Sort();

    this.listView.ListViewItemSorter = null;
}

#endregion