选择要从字典列出的所有对象值(Select All object values to list from dictionary)

我有这样的DTO：

public class OrderDraft { public string FTPUser { get; set; } public string AccountRef { get; set; } public string SupplyFromWarehouse { get; set; } public string UsePriceband { get; set; } public string DocumentDate { get; set; } public string DateRequested { get; set; } public string DatePromised { get; set; } public string CustomerDocumentNo { get; set; } public List<Line> Lines { get; set; } public Address DeliveryAddress { get; set; } public string ShippingChargeCode { get; set; } public decimal ShippingFee { get; set; } }

我像这样创建一个上面的字典：

Dictionary<string, OrderDraft> multiOrders = new Dictionary<string, OrderDraft>();

现在我想从上面的multiOrders字典中返回List<OrderDraft> 。为此，我尝试了以下方法：

return multiOrders.SelectMany(s => s.Value); return multiOrders.SelectMany(s => s.Value).ToList<OrderDraft>;

我收到以下错误：

错误2无法从用法推断出方法'System.Linq.Enumerable.SelectMany（System.Collections.Generic.IEnumerable，System.Func>）'的类型参数。尝试显式指定类型参数。

知道如何从Dictionary<String, T>检索所有值的List<T> Dictionary<String, T>吗？

I have a DTO like this:

public class OrderDraft { public string FTPUser { get; set; } public string AccountRef { get; set; } public string SupplyFromWarehouse { get; set; } public string UsePriceband { get; set; } public string DocumentDate { get; set; } public string DateRequested { get; set; } public string DatePromised { get; set; } public string CustomerDocumentNo { get; set; } public List<Line> Lines { get; set; } public Address DeliveryAddress { get; set; } public string ShippingChargeCode { get; set; } public decimal ShippingFee { get; set; } }

I create a dictionary of the above like this:

Dictionary<string, OrderDraft> multiOrders = new Dictionary<string, OrderDraft>();

Now I want to return a List<OrderDraft> from the above multiOrders dictionary. To achieve this, I tried the following:

return multiOrders.SelectMany(s => s.Value); return multiOrders.SelectMany(s => s.Value).ToList<OrderDraft>;

I am getting the following error:

Error 2 The type arguments for method 'System.Linq.Enumerable.SelectMany(System.Collections.Generic.IEnumerable, System.Func>)' cannot be inferred from the usage. Try specifying the type arguments explicitly.

Any idea how to retrieve a List<T> of all values from a Dictionary<String, T>?