NAnt SDK Documentation - v0.92 |

# StringFunctions.IndexOf Method

Returns the position of the first occurrence in the specified string of the given search string.

[Visual Basic]
<Function(Name:="index-of")>
Public Shared Function IndexOf( _
ByVal source As String, _
ByVal value As String _
) As Integer
[C#]
[Function(Name="index-of")]
public static int IndexOf(
string source,
string value
);

#### Parameters

source
  The string to search.
value
  The string to locate within source.

#### Return Value

The lowest-index position of value in source if it is found, or -1 if source does not contain value.

If value is an empty string, the return value will always be `0`.

#### Remarks

This function performs a case-sensitive word search using the invariant culture.

#### Example

    string::index-of('testing string', 'test') ==> 0

    string::index-of('testing string', '') ==> 0

    string::index-of('testing string', 'Test') ==> -1

    string::index-of('testing string', 'ing') ==> 4

#### See Also

StringFunctions Class | NAnt.Core.Functions Namespace