如何从 VB.NET 的列表中找到对象的索引？
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How do I find the index of an object from a list in VB.NET?
提问by rokonoid
Say I have a list, and I have an object. How do I find the index of that object in the list?
假设我有一个列表，我有一个对象。如何在列表中找到该对象的索引？
回答by Tim Schmelter
You can use FindIndexto find the index of an object in a generic List: This is the most flexible method to get the index of an object.
您可以使用FindIndex在泛型 List 中查找对象的索引：这是获取对象索引的最灵活的方法。
Dim list As New List(Of Object)
Const myApple = "Apple111"
For i = 0 To 1000
List.Add("Apple" & i)
Next
Dim indexOfMyApple = list.FindIndex(Function(apple) myApple.Equals(apple))
But the IndexOfmethod is even simplier and more straightforward if you only want to find an object in a List by the DefaultEqualityComparer:
但是，如果您只想通过DefaultEqualityComparer在 List 中查找对象，则IndexOf方法甚至更简单、更直接：
Dim indexOfMyApple = list.IndexOf(myApple)
You can use IndexOfalso if you don't know what type it is, .NET will use Equalsto determine if two objects are equal(should be overridden to not only compare references).
IndexOf如果您不知道它是什么类型，您也可以使用，.NET 将使用Equals来确定两个对象是否相等（应该被覆盖以不仅比较引用）。
