C# 按隐藏属性对datagrid条目进行分组

我有以下数据结构：

public class TimeData
{
    public Employee Employee { get; set; }
    public IList<WorkTime> WorkTimes { get; set; }
}

我已经尝试了以下代码：

ListCollectionView collectionView = new ListCollectionView(this.viewModel.TimeDatas);
collectionView.GroupDescriptions.Add(new PropertyGroupDescription("Employee"));
this.grdTimeData.ItemsSource = collectionView;

此选项按员工分组，但不显示工作时间列表：

---

在网格行中，我只需要工作时间，员工仅用于分组。

您需要将数据转换为

DataGrid

可以处理的格式。创建包含所有特性的视图模型类：

public class EmployeeAndWorkTime
{
    public string Name { get; set; }
    public DateTime Date { get; set; }
    public double Hours { get; set; }
    public string TimeCode { get; set; }
}

…并绑定到从现有

TimeDatas

集合创建的

IEnumerable

：

TransformedTimeDatas = TimeDatas.Select(timeData =>
{
    EmployeeAndWorkTime[] viewModels = new EmployeeAndWorkTime[timeData.WorkTimes.Count];
    for (int i = 0; i < timeData.WorkTimes.Count; ++i)
        viewModels[i] = new EmployeeAndWorkTime()
        {
            Name = string.Format("{0} {1}", timeData.Employee.FirstName, timeData.Employee.LastName),
            Date = timeData.WorkTimes[i].Date,
            Hours = timeData.WorkTimes[i].Hours,
            TimeCode = timeData.WorkTimes[i].TimeCode
        };
    return viewModels;
}).ToArray();

ListCollectionView collectionView = new ListCollectionView(TransformedTimeDatas);
collectionView.GroupDescriptions.Add(new PropertyGroupDescription("Name"));
this.grdTimeData.ItemsSource = collectionView;

TransformedTimeDatas=TimeDatas。选择（timeData=>
{
EmployeeAndWorkTime[]视图模型=新EmployeeAndWorkTime[timeData.WorkTimes.Count]；
对于（int i=0；i

public class EmployeeAndWorkTime
{
    public string Name { get; set; }
    public DateTime Date { get; set; }
    public double Hours { get; set; }
    public string TimeCode { get; set; }
}

TransformedTimeDatas = TimeDatas.Select(timeData =>
{
    EmployeeAndWorkTime[] viewModels = new EmployeeAndWorkTime[timeData.WorkTimes.Count];
    for (int i = 0; i < timeData.WorkTimes.Count; ++i)
        viewModels[i] = new EmployeeAndWorkTime()
        {
            Name = string.Format("{0} {1}", timeData.Employee.FirstName, timeData.Employee.LastName),
            Date = timeData.WorkTimes[i].Date,
            Hours = timeData.WorkTimes[i].Hours,
            TimeCode = timeData.WorkTimes[i].TimeCode
        };
    return viewModels;
}).ToArray();

ListCollectionView collectionView = new ListCollectionView(TransformedTimeDatas);
collectionView.GroupDescriptions.Add(new PropertyGroupDescription("Name"));
this.grdTimeData.ItemsSource = collectionView;