如何在List中找到元素的索引 <int> ？

Question

Here's what I have:

public int FindItem(int elementoABuscar)
{
    int indice = vectorNumeros.FindIndex(0, asd);
    return indice;
}

I can't seem to figure out the second part of the FindIndex method.

How would I find the index of elementoABuscar?

Answer 1

Just use List<int>.IndexOf :

int indice = vectorNumeros.IndexOf(elementoABuscar);

FindIndex is used to find an item which matches a particular predicate - you don't need it here, if you're just trying to find an element directly.

Note that if your list is sorted, you could also use List<T>.BinarySearch .

Answer 2

你为什么不使用list.IndexOf(object) ？

Answer 3

Try

int indice = vectorNumeros.IndexOf(elementoABuscar); 

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