如何使用DataRow列表从基于另一个数据表的数据表中选择值

// 假设 dataTable1 和 dataTable2 已经被填充了数据
var idsInDataTable1 = dataTable1.AsEnumerable().Select(row => row.Field<int>("ID")).ToList();

var selectedRows = dataTable2.AsEnumerable()
    .Where(row => idsInDataTable1.Contains(row.Field<int>("ID")))
    .ToList();

// 假设 dataTable1 和 dataTable2 已经被填充了数据
List<int> idsInDataTable1 = new List<int>();
foreach (DataRow row in dataTable1.Rows)
{
    idsInDataTable1.Add(row.Field<int>("ID"));
}

List<DataRow> selectedRows = new List<DataRow>();
foreach (DataRow row in dataTable2.Rows)
{
    if (idsInDataTable1.Contains(row.Field<int>("ID")))
    {
        selectedRows.Add(row);
    }
}

HashSet<int> idsInDataTable1 = new HashSet<int>(dataTable1.AsEnumerable().Select(row => row.Field<int>("ID")));

var selectedRows = dataTable2.AsEnumerable()
    .Where(row => idsInDataTable1.Contains(row.Field<int>("ID")))
    .ToList();

var selectedRows = dataTable2.AsEnumerable()
    .Where(row => idsInDataTable1.Contains(row.Field<int?>("ID") ?? -1))
    .ToList();