Asp.net C # How to implement a CAPTCHA without case sensitivity

We often encounter verification code input when browsing the Web page. However, in ASP. NET, how can we implement the Verification Code in case insensitive?

In fact, it is very simple. Here we only need to use a comparison function equals () in. net ();

For example, we first define two strings to be compared. We can use the following to ignore the case:

 String A = "  Verification code string  "  String B = "  String to be entered  "  ;  If  (A. Equals (B, stringcomparison. ordinalignorecase) {response. Write (  " <SCRIPT> alert ('verification code input successfully') </SCRIPT>  "  );}  Else  {Response. Write (  "  <SCRIPT> alert ('verification code input failed') </SCRIPT>  "  );} 

 

 

It's easy, right? Try it now!