IndexOf メソッド (ObservableCollection<T>)

Searches for the specified object and returns the zero-based index of the first occurrence within the entire Collection.

シンタックス

'宣言
 
Public Function IndexOf( _
   ByVal item As T _
) As Integer

public int IndexOf( 
   T item
)

item: The object to locate in the List. The value can be null 参照 (Visual Basicでは Nothing) for reference types.

The zero-based index of the first occurrence of within the entire Collection, if found; otherwise, -1.

参照