Parameters

value

A Unicode character. [Edit]

startIndex

A int containing the index of the current instance from which to start searching. [Edit]

Returns

A int containing the zero-based index of the first occurrence of value in the current instance starting from the specified index; otherwise, -1 if value was not found. [Edit]

Exceptions

Type	Reason
ArgumentOutOfRangeException	startIndex is less than zero or greater than the length of the current instance. [Edit]

Remarks

This method is case-sensitive. [Edit]

Example

The following example demonstrates the string.IndexOf(char) method.

C# Example

using System; public class StringIndexOf { public static void Main() { String str = "This is the string"; Console.WriteLine( "Searching for the index of 'h' starting from index 0 yields {0}.", str.IndexOf( 'h', 0 ) ); Console.WriteLine( "Searching for the index of 'h' starting from index 10 yields {0}.", str.IndexOf( 'h', 10 ) ); } }

The output is

Searching for the index of 'h' starting from index 0 yields 1.
Searching for the index of 'h' starting from index 10 yields -1.

Requirements

Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0