Comparing strings: Equals, =, String.Equals() and CompareTo : String Compare « Data Type « VB.Net Tutorial

Module Tester

   Sub Main()
      Dim string1 As String = "hello"
      Dim string2 As String = "good bye"
      Dim string3 As String = "Happy Birthday"
      Dim string4 As String = "happy birthday"
      Dim output As String
      Dim quotes As Char = ChrW(34)

      If (string1.Equals("hello")) Then
         Console.WriteLine("string1 equals hello")
      Else
         Console.WriteLine("not equal ")
      End If

      ' test for equality with =
      If string1 = "hello" Then
         Console.WriteLine("string1 equals " & quotes & "hello" & quotes )
      Else
         Console.WriteLine("string1 does not equal " & quotes & "hello" & quotes)
      End If

      If (String.Equals(string3, string4)) Then
         Console.WriteLine("string3 equals string4")
      Else
         Console.WriteLine("string3 does not equal string4")
      End If

      ' test CompareTo
      Console.WriteLine("string1.CompareTo(string2) is " & _
         string1.CompareTo(string2) & vbCrLf & _
         "string2.CompareTo(string1) is " & _
         string2.CompareTo(string1) & vbCrLf & _
         "string1.CompareTo(string1) is " & _
         string1.CompareTo(string1) & vbCrLf & _
         "string3.CompareTo(string4) is " & _
         string3.CompareTo(string4) & vbCrLf & _
         "string4.CompareTo(string3) is " & _
         string4.CompareTo(string3))

   End Sub ' Main

End Module

string1 equals hello
string1 equals "hello
string3 does not equal string4
string1.CompareTo(string2) is 1
string2.CompareTo(string1) is -1
string1.CompareTo(string1) is 0
string3.CompareTo(string4) is 1
string4.CompareTo(string3) is -1

2.31.String Compare
	2.31.1.	Comparing strings: Equals, =, String.Equals() and CompareTo
	2.31.2.	String Equals with overloaded operator, member method and static member method
	2.31.3.	String Compare with case sensitive and insensitive
	2.31.4.	Compare String value in If statement
	2.31.5.	Whether a string is the prefix or suffix of another string.
	2.31.6.	Use the CompareTo method with another String.
	2.31.7.	Use String.Compare to check if a URI is a file URI
	2.31.8.	Compare two strings using different CompareOptions settings.