Method

Arrays.IndexOf

Description

Used to search for a value in an array. Returns the index of the array element that contains the matching value.

Usage

result=array.IndexOf(TargetValue [,StartingIndex])

Part	Type	Description
result	Integer	Index of the array element that contains the value TargetValue.
array	Any valid data type	The array that you want to search.
TargetValue	Same type as array	The value in the array that you want to find. It must be of the same data type as the array. The IndexOf function is not case-sensitive, but it is encoding-sensitive.
StartingIndex	Integer	Optional. Array element to begin the search.

Notes

If the targetValue passed is not found, IndexOf returns -1.

IndexOf is not case-sensitive, but it is encoding-sensitive.

Arrays can have a maximum index value of 2,147,483,646.

Sample code

This example uses a ComboBox that has five items in its pop-up menu that have the names of the workdays of the week. The selected day is in its Text property. This example returns the index of the array element that matches the menu selection.

Var days() As String
days() = Array("Monday", "Tuesday", "Wednesday", "Thursday", "Friday")
Var dayNumber As Integer
dayNumber = days.IndexOf(ComboBox1.Text)
If dayNumber = -1 Then
  MessageBox("You didn't enter the name of any weekday.")
Else
  MessageBox("You entered day number " + dayNumber.ToString)
End If

Compatibility

All project types on all supported operating systems.