/// <summary>
/// 递归加载children
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TId"></typeparam>
/// <param name="parent"></param>
/// <param name="itemsArray"></param>
/// <param name="captionSelector"></param>
/// <param name="idSelector"></param>
/// <param name="parentIdSelector"></param>
/// <returns></returns>
private TreeViewItemModel RecursiveAddChildren <TSource, TId>(TreeViewItemModel parent, IEnumerable <TSource> itemsArray, Func <TSource, string> captionSelector, Func <TSource, TId> idSelector, Func <TSource, TId> parentIdSelector, Func <TSource, bool> isCheckedSelector)
{
foreach (var item in itemsArray.Where(a => object.Equals(parent.Id, parentIdSelector(a))))
{
var tvi = new TreeViewItemModel();
tvi.Caption = captionSelector(item);
tvi.Id = idSelector(item);
tvi.Tag = item;
tvi.TagType = item.GetType();
tvi.Parent = parent;
tvi.IsChecked = isCheckedSelector(item);
parent.Children.Add(tvi);
RecursiveAddChildren(tvi, itemsArray, captionSelector, idSelector, parentIdSelector, isCheckedSelector);
}
return(parent);
}
/// <summary>
/// 设置数据源, 以及各个字段
/// </summary>
/// <typeparam name="TSource">数据源类型</typeparam>
/// <typeparam name="TId">主键类型</typeparam>
/// <param name="itemsArray">数据源列表</param>
/// <param name="captionSelector">指定显示为Caption的属性</param>
/// <param name="idSelector">指定主键属性</param>
/// <param name="parentIdSelector">指定父项目主键属性</param>
public void SetItemsSourceData <TSource, TId>(IEnumerable <TSource> itemsArray, Func <TSource, string> captionSelector, Func <TSource, TId> idSelector, Func <TSource, TId> parentIdSelector, Func <TSource, bool> isCheckedSelector)
where TId : IEquatable <TId>
{
var list = new List <TreeViewItemModel>();
foreach (var item in itemsArray.Where(a => object.Equals(default(TId), parentIdSelector(a))))
{
var tvi = new TreeViewItemModel();
tvi.Caption = captionSelector(item).ToString();
tvi.Id = idSelector(item);
tvi.Tag = item;
tvi.TagType = item.GetType();
tvi.IsChecked = isCheckedSelector(item);
list.Add(tvi);
RecursiveAddChildren(tvi, itemsArray, captionSelector, idSelector, parentIdSelector, isCheckedSelector);
}
innerTree.ItemsSource = list;
return;
}