是否可以在 Observable 集合中的数组列的索引上添加分组?

Is it possible to add grouping on the index's of array column in an Observable Collection?

我有一个带有预定义 class 的 ObservableCollection,目前 ObservableCollection 使用 ICollectionView 显示在 DataGrid 中,并按列 sl_Id、sl_Name、sl_Date 分组。

但是我想知道是否可以按 sl_struct 的索引分组,数组的长度是在运行时确定的。

public class SyncLog
{
    public string sl_ID { get; set; }
    public string sl_Name { get; set; }
    public string sl_Date { get; set; }
    public string sl_Type { get; set; }
    public string[] sl_Struct { get; set; }
    public string sl_SourceMachine { get; set; }
    public string sl_Source { get; set; }
    public string sl_DestMachine { get; set; }
    public string sl_Dest { get; set; }
    public bool sl_Success { get; set; }
    public string sl_Time { get; set; }
    public string sl_Size { get; set; }
}

当前分组代码

ICollectionView backupLogView = CollectionViewSource.GetDefaultView(Synclog);

PropertyGroupDescription group1 = new PropertyGroupDescription("sl_Id");
PropertyGroupDescription group2 = new PropertyGroupDescription("sl_Name");
PropertyGroupDescription group3 = new PropertyGroupDescription("sl_Date");

backupLogView.GroupDescriptions.Add(group1);
backupLogView.GroupDescriptions.Add(group2);
backupLogView.GroupDescriptions.Add(group3);

backupLogView.SortDescriptions.Add(new SortDescription("sl_Id", ListSortDirection.Ascending));
backupLogView.SortDescriptions.Add(new SortDescription("sl_Name", ListSortDirection.Ascending));
backupLogView.SortDescriptions.Add(new SortDescription("sl_Date", ListSortDirection.Ascending));
backupLogView.SortDescriptions.Add(new SortDescription("sl_Time", ListSortDirection.Ascending));

backupLogView.Refresh();

如果 new PropertyGroupDescription("sl_Struct.Length") 不起作用,虽然它可能应该起作用,但您可以将另一个 属性 添加到您的 SyncLog class 即 returns sl_Struct.Length

public class SyncLog
{
    public string[] sl_Struct { get; set; }
    public int sl_StructLength => sl_Struct?.Length ?? 0;
}
...
PropertyGroupDescription group = new PropertyGroupDescription("sl_StructLength ");

如果您不能将 属性 添加到 SyncLog class(例如,如果它是一些外部 DTO),那么您可能应该创建一个专门的 SyncLogViewModel包装常规 SyncLog 并添加 sl_StructLength

public class SyncLogViewModel
{
    private readonly SyncLog _syncLog;
    public SyncLogViewModel(SyncLog syncLog) =>
         _syncLog = syncLog ?? throw new ArgumentNullException(nameof(syncLog));
    public int sl_StructLength => _syncLog.sl_Struct?.Length ?? 0;
    public int sl_Struct 
    {
         get => _syncLog.sl_Struct;
         set => _syncLog.sl_Struct = value;
    }
    // Other properties...
}