private void TagTreeView_TagCheckChanged(object sender, TagCheckChangedEventArgs e)
{
IEnumerable <FileInfo> result;
if (tagTreeView.SelectedTag.Count == 0)
{
result = files.ToList();
}
else
{
result = tagTreeView.SelectedTag
.Join(mappers, x => x.Id, y => y.TagId, (x, y) => y)
.Join(files, x => x.FileId, y => y.Id, (x, y) => y)
.Distinct()
.ToList();
}
var needAdd = result.Except(fileListView.ItemsSource as BindingList <FileInfo>).ToArray();
var needDel = (fileListView.ItemsSource as BindingList <FileInfo>).Except(result).ToArray();
foreach (var del in needDel)
{
(fileListView.ItemsSource as BindingList <FileInfo>).Remove(del);
}
foreach (var add in needAdd)
{
(fileListView.ItemsSource as BindingList <FileInfo>).Add(add);
}
}
/// <summary>
/// 事件->TagTree->选择Tag变化
/// </summary>
/// <param name="selectedTags"></param>
private void TagTree_TagCheckChanged(object sender, TagCheckChangedEventArgs e)
{
if (e.Tags.Count() == 0)
{
(fileList.ItemsSource as BindingList <FileInfo>).Clear();
foreach (var item in files)
{
(fileList.ItemsSource as BindingList <FileInfo>).Add(item);
}
}
else
{
(fileList.ItemsSource as BindingList <FileInfo>).Clear();
e.Tags
.Join(mappers, x => x.Id, y => y.TagId, (x, y) => y.FileId)
.Join(files, x => x, y => y.Id, (x, y) => y)
.Distinct()
.ToList()
.ForEach(item => (fileList.ItemsSource as BindingList <FileInfo>).Add(item));
}
}
