Array.IndexOf Method |
System.Array
Array.IndexOf( Array , Value [, startIndex [, count ]])
The array to be searched
The object that is searched for
The index at which to start the search
The number of items to search
The index of the first occurrence of Value in Array , or -1
Returns an Integer representing the index of the first occurrence of value in Array
Array must be a one-dimensional array.
By default, the IndexOf method searches for Value from the beginning to the end of Array .
If startIndex is provided without count , IndexOf searches from startIndex to the last element of Array .
If both startIndex and count are provided, the method searches count elements starting at startIndex . In other words, it searches from array(startIndex) to array(startIndex + count - 1) .
If startIndex is present and is outside of the range of the elements in Array , the method returns -1.
If count is present and startIndex + count - 1 exceeds the total number of elements in Array , the method call generates an ArgumentOutOfRangeException exception.
The following code searches for a value in an Integer array:
Dim i As Integer Dim a(99999) As Integer For i = 0 To 99999 a(i) = CInt(Rnd( ) * 100000) Next MsgBox(Array.IndexOf(a, 36500))
You can also specify the starting index for the search, as well as the number of elements to search. For example:
Array.IndexOf(array:=a, value:=136500, startIndex:=100, _ count:=1000)