无法弄清楚问题是什么
If IsNothing(_cartItem) Then
Dim SPDB As New SamplePicturesDataContext()
Dim q = From sp In SPDB.Pictures _
Where sp.Id = ItemId _
Select New With {.Pic_Desc = sp.Description, _
.Pic_Title = sp.PictureName}
_cartItem = New CartItem(q.Pic_Desc, 1, q.Pic_Title)
Else
Error 1 'Pic_Desc' is not a member of 'System.Linq.IQueryable(Of <anonymous type>)'.
Error 2 'Pic_Title' is not a member of 'System.Linq.IQueryable(Of <anonymous type>)'.
答案 0 :(得分:1)
因为类型是IQueryable
,所以您需要枚举查询以便对其进行评估,然后才能使用它。
这应该有用(注意我不检查你应该做的Nothing
):
Dim SPDB As New SamplePicturesDataContext()
Dim q = (From sp In SPDB.Pictures _
Where sp.Id = ItemId _
Select New With {.Pic_Desc = sp.Description, _
.Pic_Title = sp.PictureName}).SingleOrDefault() ' assume singleordefault due to matching on id values.
_cartItem = New CartItem(q.Pic_Desc, 1, q.Pic_Title)