comparing strings in vb

Question

Hopefully this should be an easy question  In java i think it s compareTo     How do I compare 2 string variables to determine if they are the same   ie   If  string1   string2 And string3   string4  Then      perform operation Else      perform another operation End If

User · Answer

In vb net you can actually compare strings with    Even though String is a reference type  in vb net   on String has been redefined to do a case-sensitive comparison of contents of the two strings   You can test this with the following code  Note that I have taken one of the values from user input to ensure that the compiler cannot use the same reference for the two variables like the Java compiler would if variables were defined from the same string Literal  Run the program  type  This  and press  lt Enter gt    Sub Main       Dim a As String   New String  This       Dim b As String      b   Console ReadLine        If a   b Then         Console WriteLine  They are equal       Else         Console WriteLine  Not equal       End If     Console ReadLine   End Sub

User · Answer

I know this has been answered  but in VB net above 2013  the lowest I ve personally used  you can just compare strings with an   operator  This is the easiest way   So basically    If string1   string2 Then      do a thing End If

User · Answer

I think this String Equals is what you need         Dim aaa    12 31              Dim a   String Equals aaa   06 30     a will return false

User · Answer

Dim MyString As String    Hello World  Dim YourString As String    Hello World  Console WriteLine String Equals MyString  YourString     returns a bool True   This comparison is case-sensitive   So in your example   if String Equals string1  string2  and String Equals string3  string4  then     do something else     do something else end if

User · Answer

If String Compare string1 string2 True  Then       perform operation  EndIf

User · Answer

I would suggest using the String Compare method  Using that method you can also control whether to to have it perform case-sensitive comparisons or not   Sample   Dim str1 As String    String one  Dim str2 As String   str1 Dim str3 As String    String three  Dim str4 As String   str3  If String Compare str1  str2    0 And String Compare str3  str4    0 Then     MessageBox Show  str1   str2 And str3   str4   Else     MessageBox Show  Else   End If   Edit  if you want to perform a case-insensitive search you can use the StringComparison parameter   If String Compare str1  str2  StringComparison InvariantCultureIgnoreCase    0 And String Compare str3  str4  StringComparison InvariantCultureIgnoreCase    0 Then

[vb.net] comparing strings in vb

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