Parameters

value

A Unicode character.

startIndex

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

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.

Exceptions

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

Remarks

This method is case-sensitive.

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