2015. 4. 27. 16:29
C# with DataGridView
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'C# with DataGridView' 카테고리의 다른 글
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