String.Contains Method

July 28, 2014

Returns a value indicating whether the specified String object occurs within this string.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

'Declaration
Public Function Contains ( _
	value As String _
) As Boolean

Parameters

value
Type: System.String
The string to seek.

Return Value

Type: System.Boolean
true if the value parameter occurs within this string, or if value is the empty string (""); otherwise, false.

ExceptionCondition
ArgumentNullException

value is Nothing.

This method performs an ordinal (case-sensitive and culture-insensitive) comparison. The search begins at the first character position of this string and continues through the last character position.

The following code example determines whether the string "fox" is a substring of a familiar quotation.


' This example demonstrates the String.Contains() method

Class Example
   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      Dim s1 As String = "The quick brown fox jumps over the lazy dog"
      Dim s2 As String = "fox"
      Dim b As Boolean
      b = s1.Contains(s2)
      outputBlock.Text += String.Format("Is the string, s2, in the string, s1?: {0}", b) & vbCrLf
   End Sub 'Main
End Class 'Sample
'
'This example produces the following results:
'
'Is the string, s2, in the string, s1?: True
'


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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