■ VirtualServerModeSource 클래스에서 데이터 테이블을 사용해 무한 스크롤을 처리하는 방법을 보여준다.
▶ CustomPropertyDescriptor.cs
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using System; using System.ComponentModel; using System.Data; namespace TestProject { /// <summary> /// 커스텀 속성 설명자 /// </summary> public class CustomPropertyDescriptor : PropertyDescriptor { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 속성 타입 /// </summary> private Type propertyType; /// <summary> /// 컴포넌트 타입 /// </summary> private Type componentType; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 속성 타입 - PropertyType /// <summary> /// 속성 타입 /// </summary> public override Type PropertyType { get { return this.propertyType; } } #endregion #region 컴포넌트 타입 - ComponentType /// <summary> /// 컴포넌트 타입 /// </summary> public override Type ComponentType { get { return this.componentType; } } #endregion #region 읽기 전용 여부 - IsReadOnly /// <summary> /// 읽기 전용 여부 /// </summary> public override bool IsReadOnly { get { return false; } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Protected #region 생성자 - CustomPropertyDescriptor(propertyName, attributeArray) /// <summary> /// 생성자 /// </summary> /// <param name="propertyName">속성명</param> /// <param name="attributeArray">특성 배열</param> protected CustomPropertyDescriptor(string propertyName, Attribute[] attributeArray) : base(propertyName, attributeArray) { } #endregion ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - CustomPropertyDescriptor(propertyName, propertyType, componentType) /// <summary> /// 생성자 /// </summary> /// <param name="propertyName">속성명</param> /// <param name="propertyType">속성 타입</param> /// <param name="componentType">컴포넌트 타입</param> public CustomPropertyDescriptor(string propertyName, Type propertyType, Type componentType) : this(propertyName, null) { this.propertyType = propertyType; this.componentType = componentType; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 값 리셋 가능 여부 구하기 - CanResetValue(component) /// <summary> /// 값 리셋 가능 여부 구하기 /// </summary> /// <param name="component">컴포넌트</param> /// <returns>값 리셋 가능 여부</returns> public override bool CanResetValue(object component) { return false; } #endregion #region 값 리셋하기 - ResetValue(component) /// <summary> /// 값 리셋하기 /// </summary> /// <param name="component">컴포넌트</param> public override void ResetValue(object component) { throw new NotImplementedException(); } #endregion #region 값 구하기 - GetValue(component) /// <summary> /// 값 구하기 /// </summary> /// <param name="component">컴포넌트</param> /// <returns>값</returns> public override object GetValue(object component) { DataRow dataRow = (DataRow)component; return dataRow[Name]; } #endregion #region 값 설정하기 - SetValue(component, value) /// <summary> /// 값 설정하기 /// </summary> /// <param name="component">컴포넌트</param> /// <param name="value">값</param> public override void SetValue(object component, object value) { DataRow dataRow = (DataRow)component; dataRow[Name] = value; } #endregion #region 값 직렬화 여부 구하기 - ShouldSerializeValue(component) /// <summary> /// 값 직렬화 여부 구하기 /// </summary> /// <param name="component">컴포넌트</param> /// <returns>값 직렬화 여부</returns> public override bool ShouldSerializeValue(object component) { return true; } #endregion } } |
▶ DataRowSource.cs
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using System.ComponentModel; using System.Data; namespace TestProject { /// <summary> /// 데이터 행 호스 /// </summary> public class DataRowSource : BindingList<DataRow>, ITypedList { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 데이터 테이블 /// </summary> private readonly DataTable dataTable; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - DataRowSource(dataTable) /// <summary> /// 생성자 /// </summary> /// <param name="dataTable">데이터 테이블</param> public DataRowSource(DataTable dataTable) { this.dataTable = dataTable; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 항목 속성 컬렉션 구하기 - GetItemProperties(sourceArray) /// <summary> /// 항목 속성 컬렉션 구하기 /// </summary> /// <param name="sourceArray">소스 배열</param> /// <returns>항목 속성 컬렉션</returns> public PropertyDescriptorCollection GetItemProperties(PropertyDescriptor[] sourceArray) { if(this.dataTable == null) { return null; } PropertyDescriptor[] targetArray = new CustomPropertyDescriptor[this.dataTable.Columns.Count]; for(int i = 0; i < targetArray.Length; i++) { targetArray[i] = new CustomPropertyDescriptor ( this.dataTable.Columns[i].ColumnName, this.dataTable.Columns[i].DataType, typeof(DataRow) ); } PropertyDescriptorCollection targetCollection = new PropertyDescriptorCollection(targetArray); return targetCollection; } #endregion #region 리스트명 구하기 - GetListName(sourceArray) /// <summary> /// 리스트명 구하기 /// </summary> /// <param name="sourceArray">소스 배열</param> /// <returns>리스트명</returns> public string GetListName(PropertyDescriptor[] sourceArray) { return typeof(DataRow).Name; } #endregion } } |
▶ MainForm.cs
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using System; using System.Data; using System.Threading.Tasks; using DevExpress.Data; using DevExpress.Utils; using DevExpress.XtraEditors; using DevExpress.XtraGrid.Views.Grid; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : XtraForm { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 배치 크기 /// </summary> private int batchSize = 10; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); this.gridView.InitializeView ( true, // Multi Select GridMultiSelectMode.CellSelect, // Grid Multi Select Mode DrawFocusRectStyle.CellFocus, // Draw Focus Rect Style true, // Show Indicator true, // Show Column Headers true, // Allow Column Moving true, // Allow Column Resizing true, // Allow Filter true, // Allow Sort false, // Allow Cell Merge EditorShowMode.Default, // Editor Show Mode false // Editable ); this.gridView.OptionsBehavior.AutoPopulateColumns = true; VirtualServerModeSource virtualServerModeSource = new VirtualServerModeSource(); virtualServerModeSource.MoreRows += virtualServerModeSource_MoreRows; virtualServerModeSource.AcquireInnerList += virtualServerModeSource_AcquireInnerList; this.gridControl.DataSource = virtualServerModeSource; this.gridView.BestFitColumns(); } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 가상 서버 모드 소스 내부 리스트 획득시 처리하기 - virtualServerModeSource_AcquireInnerList(sender, e) /// <summary> /// 가상 서버 모드 소스 내부 리스트 획득시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void virtualServerModeSource_AcquireInnerList(object sender, VirtualServerModeAcquireInnerListEventArgs e) { DataTable sourceDataTable = GetDataTable(0, 0); e.InnerList = new DataRowSource(sourceDataTable); } #endregion #region 가상 서버 모드 소스 추가 행 처리하기 - virtualServerModeSource_MoreRows(sender, e) /// <summary> /// 가상 서버 모드 소스 추가 행 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void virtualServerModeSource_MoreRows(object sender, VirtualServerModeRowsEventArgs e) { e.RowsTask = Task.Factory.StartNew ( () => { DataTable batchDataTable = GetDataTable(e.CurrentRowCount, batchSize); DataRowSource dataRowSource = new DataRowSource(batchDataTable); for(int i = 0; i < batchDataTable.Rows.Count; i++) { dataRowSource.Add(batchDataTable.Rows[i]); } return new VirtualServerModeRowsTaskResult(dataRowSource, true); }, e.CancellationToken ); } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 데이터 테이블 구하기 - GetDataTable(startID, count) /// <summary> /// 데이터 테이블 구하기 /// </summary> /// <param name="startID">시작 ID</param> /// <param name="count">카운트</param> /// <returns>데이터 테이블</returns> private DataTable GetDataTable(int startID, int count) { DataTable dataTable = new DataTable(); dataTable.Columns.Add("ID" , typeof(int )); dataTable.Columns.Add("Name" , typeof(string )); dataTable.Columns.Add("IsActive" , typeof(bool )); dataTable.Columns.Add("OrderCount" , typeof(int )); dataTable.Columns.Add("RegistrationDate", typeof(DateTime)); for(int i = startID; i < startID + count; i++) { dataTable.Rows.Add(i, "Name" + i, i % 2 == 0, i * 10, DateTime.Now.AddDays(i)); } return dataTable; } #endregion } } |
