■ GridControl 클래스에서 대용량 데이터를 바인딩하는 방법을 보여준다. (캐시 객체 Dictionary 사용시)
▶ IItemGenerator.cs
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namespace TestProject { /// <summary> /// 항목 제너레이터 인터페이스 /// </summary> /// <typeparam name="TItem">항목 타입</typeparam> public interface IItemGenerator<TItem> { //////////////////////////////////////////////////////////////////////////////////////////////////// Property #region 항목 수 - Count /// <summary> /// 항목 수 /// </summary> int Count { get; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method #region 항목 생성하기 - CreateItem(index) /// <summary> /// 항목 생성하기 /// </summary> /// <param name="index">인덱스</param> /// <returns>항목</returns> TItem CreateItem(int index); #endregion } } |
▶ VirtualList.cs
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using System; using System.Collections; using System.Collections.Generic; namespace TestProject { /// <summary> /// 가상 리스트 /// </summary> /// <typeparam name="TItem">항목 타입</typeparam> public class VirtualList<TItem> : IList<TItem>, IList where TItem : class { //////////////////////////////////////////////////////////////////////////////////////////////////// Class ////////////////////////////////////////////////////////////////////////////////////////// Private #region 가상 열거자 - VirtualEnumerator /// <summary> /// 가상 열거자 /// </summary> private class VirtualEnumerator : IEnumerator<TItem> { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 가상 리스트 /// </summary> private readonly VirtualList<TItem> virtualList; /// <summary> /// 현재 인덱스 /// </summary> private int currentIndex; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region (IEnumerator<T>) 현재 항목 - Current /// <summary> /// 현재 항목 /// </summary> public TItem Current { get { return this.virtualList[this.currentIndex]; } } #endregion #region (IEnumerator) 현재 항목 - IEnumerator.Current /// <summary> /// 현재 항목 /// </summary> object IEnumerator.Current { get { return Current; } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - VirtualEnumerator(virtualList) /// <summary> /// 생성자 /// </summary> /// <param name="virtualList">가상 리스트</param> public VirtualEnumerator(VirtualList<TItem> virtualList) { this.virtualList = virtualList; this.currentIndex = 0; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region (IEnumerator<T>) 다음 항목으로 이동하기 - MoveNext() /// <summary> /// 다음 항목으로 이동하기 /// </summary> /// <returns>처리 결과</returns> public bool MoveNext() { if(this.currentIndex == this.virtualList.Count) { return false; } ++this.currentIndex; return true; } #endregion #region (IEnumerator<T>) 리셋하기 - Reset() /// <summary> /// 리셋하기 /// </summary> public void Reset() { this.currentIndex = 0; } #endregion #region (IEnumerator<T>) 리소스 해제하기 - Dispose() /// <summary> /// 리소스 해제하기 /// </summary> public void Dispose() { } #endregion } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 항목 제너레이터 /// </summary> private readonly IItemGenerator<TItem> itemGenerator; /// <summary> /// 캐시 항목 딕셔너리 /// </summary> private readonly Dictionary<int, TItem> cacheItemDictionary; /// <summary> /// 항목 수 /// </summary> private readonly int itemCount; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region (IList) 고정 크기 여부 - IsFixedSize /// <summary> /// 고정 크기 여부 /// </summary> public bool IsFixedSize { get { return true; } } #endregion #region (IList) 인덱서 - IList.this[index] /// <summary> /// 인덱서 /// </summary> /// <param name="index">인덱스</param> /// <returns>항목</returns> object IList.this[int index] { get { return this[index]; } set { throw new NotSupportedException("VirtualList is a read-only collection."); } } #endregion #region (IList<T>) 인덱서 - this[index] /// <summary> /// 인덱서 /// </summary> /// <param name="index">인덱스</param> /// <returns>항목</returns> public TItem this[int index] { get { if(!IsItemCached(index)) { CacheItem(index); } return this.cacheItemDictionary[index]; } set { throw new NotSupportedException("VirtualList is a read-only collection."); } } #endregion #region (ICollection) 동기화 여부 - IsSynchronized /// <summary> /// 동기화 여부 /// </summary> public bool IsSynchronized { get { return false; } } #endregion #region (ICollection) 동기 객체 - SyncRoot /// <summary> /// 동기 객체 /// </summary> public object SyncRoot { get { return this; } } #endregion #region (ICollection<T>) 항목 수 - Count /// <summary> /// 항목 수 /// </summary> public int Count { get { return this.itemCount; } } #endregion #region (ICollection<T>) 읽기 전용 여부 - IsReadOnly /// <summary> /// 읽기 전용 여부 /// </summary> public bool IsReadOnly { get { return true; } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - VirtualList(itemGenerator) /// <summary> /// 생성자 /// </summary> /// <param name="itemGenerator">항목 제너레이터</param> public VirtualList(IItemGenerator<TItem> itemGenerator) { this.itemGenerator = itemGenerator; this.cacheItemDictionary = new Dictionary<int, TItem>(); this.itemCount = this.itemGenerator.Count; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region (IList) 추가하기 - Add(value) /// <summary> /// 추가하기 /// </summary> /// <param name="value">값</param> /// <returns>인덱스</returns> public int Add(object value) { throw new NotSupportedException("VirtualList is a read-only collection."); } #endregion #region (IList) 삽입하기 - Insert(index, value) /// <summary> /// 삽입하기 /// </summary> /// <param name="index">인덱스</param> /// <param name="value">값</param> public void Insert(int index, object value) { throw new NotSupportedException("VirtualList is a read-only collection."); } #endregion #region (IList) 제거하기 - Remove(value) /// <summary> /// 제거하기 /// </summary> /// <param name="value">값</param> public void Remove(object value) { throw new NotSupportedException("VirtualList is a read-only collection."); } #endregion #region (IList) 인덱스 구하기 - IndexOf(value) /// <summary> /// 인덱스 구하기 /// </summary> /// <param name="value">값</param> /// <returns>인덱스</returns> public int IndexOf(object value) { foreach(KeyValuePair<int, TItem> keyValuePair in this.cacheItemDictionary) { if(keyValuePair.Value.Equals(value)) { return keyValuePair.Key; } } return -1; } #endregion #region (IList) 포함 여부 구하기 - Contains(value) /// <summary> /// 포함 여부 구하기 /// </summary> /// <param name="value">값</param> /// <returns>포함 여부</returns> public bool Contains(object value) { throw new NotImplementedException(); } #endregion #region (IList<T>) 삽입하기 - Insert(index, item) /// <summary> /// 삽입하기 /// </summary> /// <param name="index">인덱스</param> /// <param name="item">항목</param> public void Insert(int index, TItem item) { throw new NotSupportedException("VirtualList is a read-only collection."); } #endregion #region (IList<T>) 항목 제거하기 - RemoveAt(index) /// <summary> /// 항목 제거하기 /// </summary> /// <param name="index">인덱스</param> public void RemoveAt(int index) { throw new NotSupportedException("VirtualList is a read-only collection."); } #endregion #region (IList<T>) 인덱스 구하기 - IndexOf(item) /// <summary> /// 인덱스 구하기 /// </summary> /// <param name="item">항목</param> /// <returns>인덱스</returns> public int IndexOf(TItem item) { return IndexOf(item); } #endregion #region (ICollection) 복사하기 - CopyTo(array, index) /// <summary> /// 복사하기 /// </summary> /// <param name="array">배열</param> /// <param name="index">인덱스</param> public void CopyTo(Array array, int index) { int targetIndex = index; foreach(KeyValuePair<int, TItem> keyValuePair in this.cacheItemDictionary) { array.SetValue(keyValuePair.Value, targetIndex++); } } #endregion #region (ICollection<T>) 추가하기 - Add(item) /// <summary> /// 추가하기 /// </summary> /// <param name="item">항목</param> public void Add(TItem item) { throw new NotSupportedException("VirtualList is a read-only collection."); } #endregion #region (ICollection<T>) 제거하기 - Remove(item) /// <summary> /// 제거하기 /// </summary> /// <param name="item">항목</param> /// <returns>처리 결과</returns> public bool Remove(TItem item) { throw new NotSupportedException("VirtualList is a read-only collection."); } #endregion #region (ICollection<T>) 지우기 - Clear() /// <summary> /// 지우기 /// </summary> public void Clear() { throw new NotSupportedException("VirtualList is a read-only collection."); } #endregion #region (ICollection<T>) 포함 여부 구하기 - Contains(item) /// <summary> /// 포함 여부 구하기 /// </summary> /// <param name="item">항목</param> /// <returns>포함 여부</returns> public bool Contains(TItem item) { return (IndexOf(item) != -1); } #endregion #region (ICollection<T>) 복사하기 - CopyTo(array, index) /// <summary> /// 복사하기 /// </summary> /// <param name="array">배열</param> /// <param name="index">인덱스</param> public void CopyTo(TItem[] array, int index) { this.cacheItemDictionary.Values.CopyTo(array, index); } #endregion #region (IEnumerable) 열거자 구하기 - IEnumerable.GetEnumerator() /// <summary> /// 열거자 구하기 /// </summary> /// <returns>열거자</returns> IEnumerator IEnumerable.GetEnumerator() { return new VirtualEnumerator(this); } #endregion #region (IEnumerable<T>) 열거자 구하기 - GetEnumerator() /// <summary> /// 열거자 구하기 /// </summary> /// <returns>열거자</returns> public IEnumerator<TItem> GetEnumerator() { return new VirtualEnumerator(this); } #endregion #region 항목 캐시하기 - CacheItem(index) /// <summary> /// 항목 캐시하기 /// </summary> /// <param name="index">인덱스</param> public void CacheItem(int index) { this.cacheItemDictionary[index] = this.itemGenerator.CreateItem(index); } #endregion ////////////////////////////////////////////////////////////////////////////////////////// Private #region 항목 캐시 여부 구하기 - IsItemCached(index) /// <summary> /// 항목 캐시 여부 구하기 /// </summary> /// <param name="index">인덱스</param> /// <returns>항목 캐시 여부</returns> private bool IsItemCached(int index) { return this.cacheItemDictionary.ContainsKey(index); } #endregion } } |
▶ SampleItem.cs
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namespace TestProject { /// <summary> /// 샘플 항목 /// </summary> public class SampleItem { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public public int Value01 { get; set; } public int Value02 { get; set; } public int Value03 { get; set; } public int Value04 { get; set; } public int Value05 { get; set; } public int Value06 { get; set; } public int Value07 { get; set; } public int Value08 { get; set; } public int Value09 { get; set; } public int Value10 { get; set; } public int Value11 { get; set; } public int Value12 { get; set; } public int Value13 { get; set; } public int Value14 { get; set; } public int Value15 { get; set; } public int Value16 { get; set; } public int Value17 { get; set; } public int Value18 { get; set; } public int Value19 { get; set; } public int Value20 { get; set; } public int Value21 { get; set; } public int Value22 { get; set; } public int Value23 { get; set; } public int Value24 { get; set; } public int Value25 { get; set; } public int Value26 { get; set; } public int Value27 { get; set; } public int Value28 { get; set; } public int Value29 { get; set; } public int Value30 { get; set; } public int Value31 { get; set; } public int Value32 { get; set; } public int Value33 { get; set; } public int Value34 { get; set; } public int Value35 { get; set; } public int Value36 { get; set; } public int Value37 { get; set; } public int Value38 { get; set; } public int Value39 { get; set; } public int Value40 { get; set; } public int Value41 { get; set; } public int Value42 { get; set; } public int Value43 { get; set; } public int Value44 { get; set; } public int Value45 { get; set; } public int Value46 { get; set; } public int Value47 { get; set; } public int Value48 { get; set; } public int Value49 { get; set; } public int Value50 { get; set; } } } |
▶ SampleItemGenerator.cs
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namespace TestProject { /// <summary> /// 샘플 항목 제너레이터 /// </summary> public class SampleItemGenerator : IItemGenerator<SampleItem> { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 항목 수 /// </summary> private readonly int count; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region (IItemGenerator<T>) 항목 수 - Count /// <summary> /// 항목 수 /// </summary> public int Count { get { return this.count; } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - SampleItemGenerator() /// <summary> /// 생성자 /// </summary> public SampleItemGenerator() { this.count = 100000000; // 1억 } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region (IItemGenerator<T>) 항목 생성하기 - CreateItem(index) /// <summary> /// 항목 생성하기 /// </summary> /// <param name="index">인덱스</param> /// <returns>항목</returns> public SampleItem CreateItem(int index) { return new SampleItem { Value01 = index, Value02 = index, Value03 = index, Value04 = index, Value05 = index, Value06 = index, Value07 = index, Value08 = index, Value09 = index, Value10 = index, Value11 = index, Value12 = index, Value13 = index, Value14 = index, Value15 = index, Value16 = index, Value17 = index, Value18 = index, Value19 = index, Value20 = index, Value21 = index, Value22 = index, Value23 = index, Value24 = index, Value25 = index, Value26 = index, Value27 = index, Value28 = index, Value29 = index, Value30 = index, Value31 = index, Value32 = index, Value33 = index, Value34 = index, Value35 = index, Value36 = index, Value37 = index, Value38 = index, Value39 = index, Value40 = index, Value41 = index, Value42 = index, Value43 = index, Value44 = index, Value45 = index, Value46 = index, Value47 = index, Value48 = index, Value49 = index, Value50 = index, }; } #endregion } } |
▶ MainForm.cs
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using System.Windows.Forms; using DevExpress.XtraGrid.Columns; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); this.gridView.OptionsView.ShowGroupPanel = false; this.gridView.OptionsView.ColumnAutoWidth = false; VirtualList<SampleItem> list = new VirtualList<SampleItem>(new SampleItemGenerator()); this.gridControl.DataSource = list; foreach(GridColumn column in this.gridView.Columns) { column.Width = 100; } } #endregion } } |
