C# 如何翻转或反转相等检查

我有一个函数，希望能够使用一个参数更改相等检查，以便对于一个版本，我提取所有等于x的项，对于另一个版本，提取所有不等于x的项

以下是我的功能：

Public Function GetAllItemsByUserName(ByVal userName As String) As List(Of MyRecords)
    Dim itemsQuery = From myRecord as MyRecord from _ListOfRecords
                     Where myRecord.Name = userName
                     Select myRecord
    Return itemsQuery.ToList
End Function

因此，我想使用一个参数来翻转等式，这样我就可以提取所有=username的记录，或者所有那些！=用户名。有没有一种方法可以在不编写函数的两个版本的情况下执行此操作？

使用异或运算符

Public Function GetAllItemsByUserName(ByVal userName As String, ByVal exclude As Boolean) As List(Of MyRecords)
    Dim itemsQuery = From myRecord as MyRecord from _ListOfRecords
                     Where (myRecord.Name = userName) Xor exclude
                     Select myRecord
    Return itemsQuery.ToList
End Function

使用异或运算符

Public Function GetAllItemsByUserName(ByVal userName As String, ByVal exclude As Boolean) As List(Of MyRecords)
    Dim itemsQuery = From myRecord as MyRecord from _ListOfRecords
                     Where (myRecord.Name = userName) Xor exclude
                     Select myRecord
    Return itemsQuery.ToList
End Function

试试这个：

Public Function GetAllItemsByUserName(ByVal userName As String, ByVal equal as Boolean) As List(Of MyRecords)
    Dim itemsQuery = From myRecord as MyRecord from _ListOfRecords
                     Where (myRecord.Name = userName) = equal
                     Select myRecord
    Return itemsQuery.ToList
End Function

试试这个：

Public Function GetAllItemsByUserName(ByVal userName As String, ByVal equal as Boolean) As List(Of MyRecords)
    Dim itemsQuery = From myRecord as MyRecord from _ListOfRecords
                     Where (myRecord.Name = userName) = equal
                     Select myRecord
    Return itemsQuery.ToList
End Function

您还可以在中使用，其中：

您还可以在中使用，其中：

---

另一种方法是：

Public Function GetAllItemsByUserName(ByVal userName As String, equals As Boolean) As List(Of MyRecords)
    Dim itemsQuery = From myRecord as MyRecord from _ListOfRecords
                     Where (equals && myRecord.Name = userName) Or (!equals && myRecord.Name != userName)
                     Select myRecord
    Return itemsQuery.ToList
End Function

---

另一种方法是：

Public Function GetAllItemsByUserName(ByVal userName As String, equals As Boolean) As List(Of MyRecords)
    Dim itemsQuery = From myRecord as MyRecord from _ListOfRecords
                     Where (equals && myRecord.Name = userName) Or (!equals && myRecord.Name != userName)
                     Select myRecord
    Return itemsQuery.ToList
End Function

---

你也要用C来做这个吗？您已经为这两种语言添加了标记，但只有用VBA编写的代码，用这两种语言编写的答案将是最好的选择您想用C也这样做吗？您已经为两种语言添加了标记，但只有用VBA编写的代码，两种语言的答案都是最优秀的谢谢，这非常适合我的情况，我已经了解了Xor运算符，实际上最终使用了Tim和Henriks答案的组合，这就是我移动accept的原因。非常感谢，这非常适合我的情况，我已经了解了Xor运算符，实际上最终使用了Tim和Henriks答案的组合，这就是为什么我移动了accept。