dcsimg
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX


Tip of the Day
Language: Web
Expertise: All
Sep 21, 1999

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Beware of Null Values in ASP Database Programs

The Active Server Pages HTMLEncode function is great for handling strings that come from a database, especially if the string includes foreign characters. However, you can get into trouble if the string field in the database is empty; that is, it contains a Null. When it hits a Null, HTMLEncode throws a "Type Mismatch" error. Make sure you check for Nulls whenever you are using HTML-encoding. Here's sample routine:
 
<HTML>
<HEAD>
</HEAD>
<BODY>
<% 
Function HTMLEncode(instring)
  If Not IsNull(instring) then
    HTMLEncode=Server.HTMLEncode(instring)
  else 
    HTMLEncode=""
  end if
End function
%>

<%
dbdatastring=Null
Response.Write HTMLEncode(dbdatastring)
dbdatastring="J'ai mal 
Ken Cox
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date