Date: 2004-08-11T18:09:08
Editor: MichaelMcGrady <[EMAIL PROTECTED]>
Wiki: Apache Struts Wiki
Page: StrutsCatalogMultipleImageTagsSimplified
URL: http://wiki.apache.org/struts/StrutsCatalogMultipleImageTagsSimplified
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StrutsCatalog: '''This is an efficient way to end forever that pesky and recurrent
problem of how to use multiple image buttons in your forms.'''
'''Assume that you have code not unlike:'''
{{{
<input type='image' name='update' src='change.gif'>
<input type='image' name='delete' src='nuke.gif'>
}}}
'''or, in Struts' image tag:'''
{{{
<html:image property='submit' src='change.gif'/>
<html:image property='delete' src='nuke.gif'/>
}}}
'''Now, how do we know which image has been clicked? The answer has been complicated
and costly in the past. Here is a simple way to achieve everything at a low cost and
with great flexibility and freedom.'''
{{{
String button = null;
Enumeration enum = request.getParameterNames();
String parameterName = null;
while(enum.hasMoreElements()) {
parameterName = (String)enum.nextElement();
if(parameterName.endsWith(".x")) {
button = parameterName.substring(0,parameterName.indexOf('.'));
}
}
}}}
'''There you go. Toss out the !LookupDispatchActions, the !ButtonCommands, etc. This
is a done deal. You can clearly seek other ways to ensure a bit more safety. For
example, the code works equally as well with "submit.button" as it does with "submit".
Elegant, no, eh?
Michael !McGrady
Cap't of the Eh Team'''
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