[DEVEXPRESS/WPF] TreeListView 엘리먼트 : ChildNodesSelector 속성을 사용해 트리 구조 데이터 바인딩 하기 (TreeDerivationMode 속성 : ChildNodesSelector)

▶ C#

using System.Collections;

using DevExpress.Xpf.Grid;

/// <summary>
/// 커스텀 자식 노드 셀렉터
/// </summary>
public class CustomChildNodesSelector : IChildNodesSelector
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Method
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region 자식 선택하기 - SelectChildren(item)

    /// <summary>
    /// 자식 선택하기
    /// </summary>
    /// <param name="item">항목</param>
    /// <returns>IEnumerable 객체</returns>
    public IEnumerable SelectChildren(object item)
    {
        if(item is Task)
        {
            return null;
        }
        else if(item is ProjectStage)
        {
            return (item as ProjectStage).TaskCollection;
        }
        else if(item is ProjectObject)
        {
            return (item as ProjectObject).ProjectStageCollection;
        }

        return null;
    }

    #endregion
}

 

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▶ XAML

<Window.Resources>
    <ResourceDictionary>
        <local:ViewModel x:Key="ViewModelKey" />
        <local:CustomChildNodesSelector x:Key="CustomChildNodesSelectorKey" />
    </ResourceDictionary>
</Window.Resources>
<Grid xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid">
    <dxg:TreeListControl x:Name="treeListControl"
        DataContext="{StaticResource ViewModelKey}"
        ItemsSource="{Binding ProjectObjectCollection}">
        <dxg:TreeListControl.Columns>
            <dxg:TreeListColumn FieldName="Name"     AllowSorting="True" />
            <dxg:TreeListColumn FieldName="Executor" AllowSorting="True" />
            <dxg:TreeListColumn FieldName="State"    AllowSorting="True" />
        </dxg:TreeListControl.Columns>
        <dxg:TreeListControl.View>
            <dxg:TreeListView x:Name="treeListView"
                TreeDerivationMode="ChildNodesSelector"
                ChildNodesSelector="{StaticResource CustomChildNodesSelectorKey}" />
        </dxg:TreeListControl.View>
    </dxg:TreeListControl>
</Grid>

※ ProjectObject, ProjectStage, Task 클래스는 'TreeListControl 클래스 : 자식 노드 셀렉터를 통해 계층적 데이터 바인딩 구현하기'를 참조한다.