Randomize and SELECT CASE code-tip
We recently used the randomize function and a SELECT CASE statement on some specific webpages on ASPFree. We discovered the randomize statement begins with 0 when using VB.NET. Let us explain. 'SELECT CASE starting at 1 and no ELSE statement
'Problem is once in a while nothing displays |
<html>
<body>
<%
Dim r as new Random()
Select r.Next(3)
Case 1
response.write("some bold text")
Case 2
response.write("some underlined text")
Case 3
response.write("some italic text")
End Select
%>
</body>
</html> |
Every so often nothing would be displayed. After some investigation and understanding if there isn't an ELSE in the SELECT CASE statement why text to wouldn't display? In the specific function, an ELSE statement wasn't appropriate. What we found is to start the CASE statement at zero(0) instead of 1. The other option is to put an ELSE statement if applies. We wanted to understand why this was happening. 'SELECT CASE starting at 0 and no ELSE statement
'an ELSE statement would solve it also.
<html>
<body>
<%
Dim r as new Random()
Select r.Next(3)
Case 1
response.write("some bold text")
Case 2
response.write("some underlined text")
Case 3
response.write("some italic text")
Else
response.write("Default text to be displayed")
End Select
%>
</body>
</html>
OR
'SELECT CASE starting at 0 and no ELSE statement
'Something will display everytime.
<html>
<body>
<%
Dim r as new Random()Select r.Next(3)
Case 0
response.write("some bold text")
Case 1
response.write("some underlined text")
Case 2
response.write("some italic text")
End Select
%>
</body>
</html>
|
This probably isn't rocket science, after an hour or so of going WHAT!#@%@. This problem was solved, the easiest things can make a developer go crazy when working on a project. Hopefully this tip saves you the frustration we discovered! | DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware. |
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