Form Parameters

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Kevin Robinson - 09 Jun 2005 15:46 GMT

Can anyone please advise me with a problem.

I have a JSP which sends parameters originating from text fields to a
servlet.
This works OK.

I now want to add several buttons to the jsp form and want to pass a
parameter
to the servlet telling it which button was pressed.How do I do this?

Thanks

Kevin

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Chris Smith - 09 Jun 2005 15:53 GMT

> Can anyone please advise me with a problem.
>
[quoted text clipped - 5 lines]
> parameter
> to the servlet telling it which button was pressed.How do I do this?

Give each submit button a different "name" attribute. The values should
be ignored, since they are the text of the button itself, but you should
compare the names of the form parameters against those that you know
mean each button.

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Kevin Robinson - 10 Jun 2005 08:57 GMT

OK If I have <input type="Submit" name="AddProduct" value="Add Product">
Is the name "AddProduct" automatically sent to the server when the button is
pressed or do I need to do something else with the name first?

> > Can anyone please advise me with a problem.
> >
[quoted text clipped - 17 lines]
> Chris Smith - Lead Software Developer/Technical Trainer
> MindIQ Corporation

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Chris Smith - 10 Jun 2005 14:35 GMT

> OK If I have <input type="Submit" name="AddProduct" value="Add Product">
> Is the name "AddProduct" automatically sent to the server when the button is
> pressed or do I need to do something else with the name first?

Nope, that's all you need to do. One of the form parameters will then
have a name of "AddProduct" and a value of "Add Product", if that button
is used to submit the form.

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www.designacourse.com
The Easiest Way To Train Anyone... Anywhere.

Chris Smith - Lead Software Developer/Technical Trainer
MindIQ Corporation

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Johan Poppe - 10 Jun 2005 14:38 GMT

Kevin Robinson wrote:

>OK If I have <input type="Submit" name="AddProduct" value="Add Product">
>Is the name "AddProduct" automatically sent to the server when the button is
>pressed or do I need to do something else with the name first?

The browser sends a parameter with the name "AddProduct" and the value
"Add Product".

If another button is pressed, you'll get something else. For example,
if the user clicks a button defined with <input type="Submit"
name="RemProduct" value="Remove Product">, you will get no parameter
named AddProduct parameter, but instead you'll get a parameter named
RemProduct with the value "Remove Product"..

If you are in doubt of what parameters you actually get, it's easy to
write a testing servlet that simply echos all parameters, or write
them to a servel log or something.

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Johan Utne Poppe

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Form Parameters

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