通过引用将参数传递到公共共享方法中的问题 [英] Issue with passing parameters by reference into public shared methods

问题描述

我有一个AddlInfo的List(Of AddlInfo).

I have a List(Of AddlInfo) with AddlInfo being an object.

我正在尝试通过引用将addlInfoList传递给另一个类的函数:

I'm trying to pass addlInfoList by reference into a function of another class:

Public Shared Sub SortAddlInfo(ByRef addlInfoList As List(Of AddlInfo))
    addlInfoList.Sort(AddressOf Comparer)
End Sub

Private Function Comparer(ByVal x As AddlInfo, ByVal y As AddlInfo) As Integer
    Dim result As Integer = x.AddlInfoType.CompareTo(y.AddlInfoType)
    Return result
End Function

如果我没有将引用传递给另一个类，则此方法有效，但是当我尝试执行此操作时，出现以下错误:

This works if I'm not passing the reference into another class, but when I try to do this, I get the following error:

重载解析失败，因为无法使用以下参数调用可访问的排序":

Overload resolution failed because no accessible 'Sort' can be called with these arguments:

'Public Sub Sort(comparison As System.Comparison(Of AddlInfo))': Cannot refer to an instance member of a class from within a shared method or shared member initializer without an explicit instance of the class.
'Public Sub Sort(comparer As System.Collections.Generic.IComparer(Of AddlInfo))': 'AddressOf' expression cannot be converted to 'System.Collections.Generic.IComparer(Of MyProject.AddlInfo)' because 'System.Collections.Generic.IComparer(Of MyProject.AddlInfo)' is not a delegate type.

我可以将这些方法放回调用类中，但是我希望能够从我的应用程序中的不同类中调用这些方法.

I could put the methods back into the calling class, but I'd like to be able to call these methods from different classes within my application.

我也可以在方法中实例化一个新的List，但是为什么呢?看起来很傻.

I could also instantiate a fresh List in the methods, but why? Seems silly.

有什么办法解决吗? (或者我需要解释更多吗?)

Any way around this? (Or do I need to explain more?)

提前谢谢！

推荐答案

尝试将您的compare函数放入实现IComparer的类中.

Try putting your compare function into a class that implements IComparer.

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