/// <summary>
/// 清空所有的数据对象，释放资源
/// </summary>
public void Clear()
{
_SelectedItem = null;
_TreeRoot.Children.Clear();
AfterTreeListItemSelected = null;
_TreeRoot = null;
_DataSource = null;
}
/// <summary>
/// 创建树形视图项数据
/// </summary>
/// <param name="data">指定树形项数据附加的数据表行数据</param>
/// <param name="lazyLoadChildren">确定是否延迟加载</param>
/// <param name="DelSel">传递当项被选中时执行的函数</param>
public TreeListViewItemViewModel(DataRowView data, bool lazyLoadChildren, DelAfterSelectedList DelSel)
{
_children = new TreeListItems(this);
_DataRowView = data;
if (lazyLoadChildren)
{
_children.AddDummyChild(DummyChild);
}
AfterTreeListItemSelected = DelSel;
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="lazyLoadChildren">确定是否延迟加载，=true使用延迟加载</param>
/// <param name="DelSel">传递当项被选中时执行的函数</param>
/// <param name="DelDisSel">传递当项取消选中时执行的函数</param>
public TreeListViewItemViewModel(bool lazyLoadChildren, DelAfterSelectedList DelSel, DelAfterDisSelectedList DelDisSel)
{
_children = new TreeListItems(this);;
if (lazyLoadChildren)
{
_children.AddDummyChild(DummyChild);
}
AfterTreeListItemSelected = DelSel;
AfterTreeListItemsDiselected = DelDisSel;
}
/// <summary>
/// 创建对应表键值的数据视图
/// </summary>
/// <param name="dtable">数据表</param>
/// <param name="isUseDummyChild">设定是否使用延迟加载项</param>
public TreeListDataTable(DataView dtable, string parentKey, string key, DelAfterSelectedList DelSel, bool isUseDummyChild = true, string isDummyChildField = "")
{
ParentKey = parentKey;
Key = key;
AfterTreeListItemSelected = DelSel;
IsDummyChildField = isDummyChildField;
//创建用于绑定的数据源
_TreeRoot = new TreeListViewItemViewModel();
//设定是否使用延迟加载项
IsUseDummyChild = isUseDummyChild;
_DataSource = dtable; //记录数据对象
FillData(); //填充数据
}
