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프로그램 설명

DataGridView 칼럼을 sorting 하는 예제입니다.

SortableBindingList class 를 이용하며 BindingList class 에서 상속받은 것이며, PropertyComparer class 는 IComparer class 를 상속하여 구현하였습니다.

실행 후

1. 정렬을 하지 않은 경우

2. 정렬을 한 경우

프로그램 작성 순서

1. 라이브러리 클래스

SortableBindingList.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using Be.Timvw.Framework.Collections.Generic;

namespace Be.Timvw.Framework.ComponentModel
{
    public class SortableBindingList<t> : BindingList<t>
    {
        private readonly Dictionary<type, propertycomparer<t>> comparers;
        private bool isSorted;
        private ListSortDirection listSortDirection;
        private PropertyDescriptor propertyDescriptor;

        public SortableBindingList()
            : base(new List<t>())
        {
            this.comparers = new Dictionary<type, propertycomparer<t>>();
        }

        public SortableBindingList(IEnumerable<t> enumeration)
            : base(new List<t>(enumeration))
        {
            this.comparers = new Dictionary<type, propertycomparer<t>>();
        }

        protected override bool SupportsSortingCore
        {
            get { return true; }
        }

        protected override bool IsSortedCore
        {
            get { return this.isSorted; }
        }

        protected override PropertyDescriptor SortPropertyCore
        {
            get { return this.propertyDescriptor; }
        }

        protected override ListSortDirection SortDirectionCore
        {
            get { return this.listSortDirection; }
        }

        protected override bool SupportsSearchingCore
        {
            get { return true; }
        }

        protected override void ApplySortCore(PropertyDescriptor property, ListSortDirection direction)
        {
            List<t> itemsList = (List<t>)this.Items;

            Type propertyType = property.PropertyType;
            PropertyComparer<t> comparer;
            if (!this.comparers.TryGetValue(propertyType, out comparer))
            {
                comparer = new PropertyComparer<t>(property, direction);
                this.comparers.Add(propertyType, comparer);
            }

            comparer.SetPropertyAndDirection(property, direction);
            itemsList.Sort(comparer);

            this.propertyDescriptor = property;
            this.listSortDirection = direction;
            this.isSorted = true;

            this.OnListChanged(new ListChangedEventArgs(ListChangedType.Reset, -1));
        }

        protected override void RemoveSortCore()
        {
            this.isSorted = false;
            this.propertyDescriptor = base.SortPropertyCore;
            this.listSortDirection = base.SortDirectionCore;

            this.OnListChanged(new ListChangedEventArgs(ListChangedType.Reset, -1));
        }

        protected override int FindCore(PropertyDescriptor property, object key)
        {
            int count = this.Count;
            for (int i = 0; i < count; ++i)
            {
                T element = this[i];
                if (property.GetValue(element).Equals(key))
                {
                    return i;
                }
            }

            return -1;
        }
    }
}

PropertyComparer.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Reflection;

namespace Be.Timvw.Framework.Collections.Generic
{
    public class PropertyComparer<t> : IComparer<t>
    {
        private readonly IComparer comparer;
        private PropertyDescriptor propertyDescriptor;
        private int reverse;

        public PropertyComparer(PropertyDescriptor property, ListSortDirection direction)
        {
            this.propertyDescriptor = property;
            Type comparerForPropertyType = typeof(Comparer<>).MakeGenericType(property.PropertyType);
            this.comparer = (IComparer)comparerForPropertyType.InvokeMember("Default", BindingFlags.Static | BindingFlags.GetProperty | BindingFlags.Public, null, null, null);
            this.SetListSortDirection(direction);
        }

        #region IComparer<t> Members

        public int Compare(T x, T y)
        {
            return this.reverse * this.comparer.Compare(this.propertyDescriptor.GetValue(x), this.propertyDescriptor.GetValue(y));
        }

        #endregion

        private void SetPropertyDescriptor(PropertyDescriptor descriptor)
        {
            this.propertyDescriptor = descriptor;
        }

        private void SetListSortDirection(ListSortDirection direction)
        {
            this.reverse = direction == ListSortDirection.Ascending ? 1 : -1;
        }

        public void SetPropertyAndDirection(PropertyDescriptor descriptor, ListSortDirection direction)
        {
            this.SetPropertyDescriptor(descriptor);
            this.SetListSortDirection(direction);
        }
    }
}

2. 사용하는 방법

        private void RebindGridForPageChange()
        {
            //Rebinding the Datagridview with data
            int datasourcestartIndex = (CurrentPage - 1) * PageRows;
            Templist = new List<contacts>();
            for (int i = datasourcestartIndex; i < datasourcestartIndex + PageRows; i++)
            {
                if (i >= Baselist.Count)
                    break;

                Templist.Add(Baselist[i]);
            }

            //Set List data to SortableBindingList 
            SortableBindingList<contacts> plist = new SortableBindingList<contacts>(Templist);

            dataGridView1.DataSource = plist;
            dataGridView1.Refresh();
        }

소스 파일 : 

DataGridViewExample3.zip