C# Array IndexOf(Array, Object)

Description

Array IndexOf(Array, Object) searches for the specified object and returns the index of the first occurrence within the entire one-dimensional Array.

Syntax

Array.IndexOf(Array, Object) has the following syntax.

public static int IndexOf(
  Array array,
  Object value
)

Parameters

Array.IndexOf(Array, Object) has the following parameters.

• array - The one-dimensional Array to search.
• value - The object to locate in array.

Returns

Array.IndexOf(Array, Object) method returns The index of the first occurrence of value within the entire array, if found; otherwise, the lower bound of the array minus 1.

Example

The following code example shows how to determine the index of the first occurrence of a specified element.

using System;//ww w.j  a  v a2 s  .com
public class SamplesArray  {

   public static void Main()  {
      Array myArray=Array.CreateInstance( typeof(String), 12 );
      myArray.SetValue( "the", 0 );
      myArray.SetValue( "quick", 1 );
      myArray.SetValue( "jumps", 4 );
      myArray.SetValue( "over", 5 );
      myArray.SetValue( "the", 6 );
      myArray.SetValue( "dog", 8 );
      myArray.SetValue( "in", 9 );
      myArray.SetValue( "the", 10 );

      String myString = "the";
      int myIndex = Array.IndexOf( myArray, myString );
      Console.WriteLine( "The first occurrence of \"{0}\" is at index {1}.", myString, myIndex );

   }
}

The code above generates the following result.