小编T L*_*T L的帖子

我目前有这个报告布局

ProductNumberDescriptionPackTypeDimensionWeight
PN 1                      Desc PN1      InnerPack 1x1x1          1          
PN 1                      Desc PN1      SinglePack1x1x1.2      1.2       
PN 2                      Desc PN2      InnerPack 2x2x2          2          
PN 2                      Desc PN2      SinglePack2x2.2x2.2   2.3       
PN 3                      Desc PN3      BulkPack  3x3x3          3          

现在,我的用户想要像这样转动

                                                        InnerPack                  SinglePack                      BulkPack          
ProductNumberDescriptionDimensionWeightDimensionWeightDimensionWeight
PN 1                      Desc PN1      1x1x1         1          1x1x1.2       1.2                                         
PN 2                      Desc PN2      2x2x2         2          2x2.2x2.2    2.3                            …

我有以下课程

public PhoneModel
{
    int PhoneID;
    string PhoneType;
    string PhoneNumber;
}
public ContactModel 
{
    int ContactID;
    string FirstName;
    string LastName;
    List<PhoneModel> PhoneNumber;
}

我需要显示每个联系人的所有电话号码的联系人列表.

var contactList = await ContactBLL.GetContactList();
IEnumerable<ContactViewModel> contacts = contactList.ToList().ConvertAll(
    async c => new ContactViewModel
    {
        phones = (await ContactBLL.GetContactPhones(c.ContactID)).ToList(),
        firstName = c.FirstName, 
        lastName = c.LastName
    });

我目前得到编译错误说"不能隐式转换类型'System.Threading.Tasks.Task.List到IEnumerable ...."然而,没有async电话获取电话列表,它将工作(当然没有电话).我可以将async功能更改GetContactPhones()为同步功能,它将按预期工作.我的问题是有一种方法可以使上面的代码与async调用一起工作吗？

谢谢.