Programming Tutorials

Substring in Vb.Net String Class

By: Issac  

Substring is an interesting method of string class it returns a string that is a substring of the given string. It begins from a given index and extends up to the specified length

Public Function Substring (ByVal startIndex As Integer, ByVal length As Integer) As String 

Parameters: 
startIndex: The index of the start of the substring.
length: The number of characters in the substring.

Returns: 
The specified substring.

Exceptions: 
System.ArgumentOutOfRangeException : the beginIndex or length less than zero, or the begin index + length not within the specified string

Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click

Dim str As String
Dim retString As String
str = "This is substring test"
retString = str.Substring(8, 9)
MsgBox(retString)

End Sub
End Class
When you run this program, in the message box it will display "subtring"

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