我有一堂课
public class MyClass
{
public uint ID { get; set; }
public List<double> Values { get; set; }
}
然后,我正在创建一个类对象列表:
List<MyClass> objects = new List<MyClass>(); // then I add the data to this list
现在,我需要从 对象 中选择数据,例如:
var query = objects.Select(o => new { o.ID, o.Values } ).ToList(); // this example show only ID field in DataTable
并像这样将结果转换为DataTable:
public DataTable ConvertToDataTable<T>(IList<T> data)
{
DataTable table = new DataTable();
PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
foreach (PropertyDescriptor prop in properties)
table.Columns.Add(prop.Name, Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType);
foreach (T item in data)
{
DataRow row = table.NewRow();
foreach (PropertyDescriptor prop in properties)
row[prop.Name] = prop.GetValue(item) ?? DBNull.Value;
table.Rows.Add(row);
}
return table;
}
因此,我需要进行类似交叉表查询的操作。我该怎么办?