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ColdFusion MX 7 Getting Started Experience Tutorial Page 38 of 47
The cfif tag in this case translates to “if the current row being processed from the artwork query result set gives a
remainder of 1 after it is divided by 3, print a tr tag to the HTML.”
Using conditional processing with arithmetic operations is a powerful tool for your ColdFusion applications.
19. Add conditional statements around both the opening tr and the ending tr tags, as the following code shows:
<table border="0" cellpadding="15" cellspacing="0" /jointfilesconvert/293559/bgcolor="#FFFFFF">
<cfoutput query="artwork">
<cfif artwork.currentrow mod 3 eq 1>
<tr>
</cfif>
<td valign="top" align="center" width="200">
<img src="images/#artwork.largeImage#" width="200" height="200"><br>
<strong>#artwork.artName#</strong><br>
Artist: #artwork.firstName# #artwork.lastName#<br>
Price: #artwork.price#<br>
#artwork.mediaType# - #artwork.description#<br>
<font color="##FF0000">#artwork.isSold#</font>
</td>
<cfif artwork.currentrow mod 3 eq 0>
</tr>
</cfif>
</cfoutput>
</table>
Learning Point: Rules for using the Number signs
The artwork.currentRow variable does not need to be surrounded by number signs (#) when it is inside a cfif tag.
You can think of the use of number signs as necessary when it’s potentially unclear to ColdFusion what is a variable and
what is not.
Consider these rules:
• Number signs are necessary between beginning and ending cfoutput tags, because variables are intermingled with
plain text and HTML tags, and ColdFusion MX 7 needs to be told what to evaluate and what not to evaluate.
• Number signs are not necessary inside a cfif tag, because ColdFusion knows to only expect ColdFusion variables
and expressions there.
• Number signs are necessary between beginning and ending cfif tags because, like with cfoutput tags, variables
are intermingled with plain text and HTML tags.
• Number signs are sometimes necessary in a tag’s attribute values, as in the case of <cfdump var="#artwork#">,
to clarify to ColdFusion that you want the value treated as a variable rather than a literal string.
In the last two bullets, a distinction is made between variables between tags and variables inside a tag’s attributes.
20. Save and browse the page, and then view the page source.
- Figure 1. Final web page 1
- Figure 5. Site Definition 4
- Figure 6. Selecting 4
- ColdFusion as the server 4
- Figure 7. Working locally 5
- Figure 9. Possible server 7
- Figure 12. The Files panel 9
- Figure 13. The index.htm 9
- Figure 15. Inserting a table 11
- Figure 16. Inserting a row 11
- Figure 18. Dragging the 13
- Figure 19. Bowl of Flowers 13
- Figure 21. Complete row of 15
- Figure 22. HTML data 15
- Figure 25. index.htm is 17
- Figure 26. Confirm testing 17
- Figure 32. Drill down into 20
- Figure 35. Naming the data 22
- Figure 43. Database 27
- Figure 44. Joining the Art 27
- Figure 49. Query result set 31
- Figure 50. Variables don’t 33
- Figure 53. The query 35
- Figure 58. The art pieces 41
- Figure 61. Saving the page 43
- Next Step 47
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