THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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:
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<input type='image' name='update' src='change.gif'> <input type='image' name='delete' src='nuke.gif'> |
or, in Struts' image tag:
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<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.
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public class ImageTagUtil {
public static String getName(HttpServletRequest request) {
String command = null;
String buttonValue = null;
Enumeration enum = request.getParameterNames();
while(enum.hasMoreElements()) {
buttonValue = (String)enum.nextElement();
if(buttonValue.endsWith(".x")) {
command = buttonValue.substring(0,buttonValue.indexOf('.'));
}
}
return command;
}
}
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So, don't use buttons, but just mine the value of the \[name\].x request parameter. |
Michael McGrady
(N.B.: This solution also works for non-image (submit) buttons by using values like <input type="submit" name="add.x" value="add"> in the submit button. Or, just use <input type="submit" name="button" value="add"> for a different solution for <input type="submit"> versus <input type="image">)'''