Question

我需要以下答案的vb.net语法（在c＃中给出） -

How can I convert Linq results to DTO class object without iteration

我已尝试在this link转换为vb.net，但确实会出现编译错误。

以下是上述转换器的输出 -

Public Function [Get]() As List(Of User)
Using db = New MyContext()
    Return (From u In db.UsersOrder By u.FirstNameNew User() With { _
        Key .Id = u.pkUser, _
        Key .Username = u.Username, _
        Key .Password = u.Password, _
        Key .Active = u.Active _
    }).ToList()
End Using
End Function

Answer 1

嗯，Linq查询显然搞砸了。由于您尝试转换的代码中没有User类，因此转换器尝试使用Key关键字，该关键字仅用于匿名类型。

所以正确的代码应如下所示：

Public Function [Get]() As List(Of User)
    Using db = New MyContext()
        Return (From u In db.Users
                Order By u.FirstName
                Select New User() With { 
                    .Id = u.pkUser, 
                    .Username = u.Username, 
                    .Password = u.Password, 
                    .Active = u.Active 
                }).ToList()
    End Using
End Function

假设以下User类：

Public Class User
    Public Id As Integer
    Public Username As String
    Public Password As String
    Public Active As Boolean
End Class

Answer 2

现在有效 - 以下是转换器中缺少的关键字。

订单
选择新
删除了关键字密钥

，最终代码如下 -

Public Function [Get]() As List(Of User)
Using db = New MyContext()
Return (From u In db.UsersOrder Order By u.FirstNameNew select new User() With { _
    .Id = u.pkUser, _
    .Username = u.Username, _
    .Password = u.Password, _
    .Active = u.Active _
}).ToList()
End Using

将Linq结果转换为vb.net中的对象类型

2 个答案: