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.