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What is the equivalent of JOptionPane in JSP?

 
Sarra Sakka
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Hello,
I want to get a message when i press the button,so, what's the equivalent of JOptionPane in Jsp?
 
Ulf Dittmer
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JSP is a server-side technology; it has no GUI facilities. On the client-side you can use JavaScript; its "alert" and "confirm" methods fulfill similar purposes.
 
Sarra Sakka
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Could you please give me an example to better understand
where javascript is written?not in a jsp page ?
 
Ulf Dittmer
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The JavaScript can be part of the HTML page (which may be written by a JSP page), or it might be included via a <script src="..."> tag.
 
Sarra Sakka
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I put this :

Where i put the <script src="..."> tag?
I want to display a Message like "Are you sure to delete this category?", if i choose "Yes" ,the category deleted from the database and if i choose "no" this operation not performed.
how can i do this ?
Thank you in advance
 
Raymond Gillespie
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Sarra Sakka wrote:I put this :

Where i put the <script src="..."> tag?
I want to display a Message like "Are you sure to delete this category?", if i choose "Yes" ,the category deleted from the database and if i choose "no" this operation not performed.
how can i do this ?
Thank you in advance



The script tag goes into the head of the document if you are linking an external JavaScript page. Most likely, it would also go in the head if you are simply writing the JavaScript in the page. Both methods will work



 
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You seem to think that JSP is something different from HTML. JSP is just a template for creating an HTML file.

Please read this article to understand this.

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Bear Bibeault
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Sarra Sakka wrote:
I want to display a Message like "Are you sure to delete this category?", if i choose "Yes" ,the category deleted from the database and if i choose "no" this operation not performed.
how can i do this ?


If you don't mind appearances, the window.confirm() JavaScript function should serve your purposes. If you want to get fancier, you'll need to find a dialog plugin.

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Sarra Sakka
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@Raymond Gillespie:i should choose one of these method :
1-

If the jasascipt page is externel.

2-

If the JavaScript in inside the jsp page.
This is what you mean?is not it ?
 
Ulf Dittmer
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What happened when you tried?

BTW, I think line 4 of the second approach will not work as is - it doesn't look at the value in that field, but at the field itself.
 
Sarra Sakka
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@Bear Bibeault: Could you please give me a simple example "dialog plugin" ?
I find this :

what is your opinion about this?
thank you in advance
 
Sarra Sakka
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I tried with this code:

Only when i open my page, this message display.
If i want to display it, for example when i pressed a button, how can i do it?
 
Ulf Dittmer
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The button needs an onClick handler that calls a JavaScript function - so you need to move the code to a function.
 
Sarra Sakka
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Ok, thank you
 
Sarra Sakka
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Now, i know how can i display a confirm message, thanks to you.
But, i have another problem, how can i delete this category from my database when i click a delete button?

 
Ulf Dittmer
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You need to submit the form to a URL that can do this. All required information would need to be part of the form submit, maybe the "category" has an ID to identify it.

Note that you should use a POST (and thus an actual form submit) to perform data-altering operations, not a GET like you would be doing in the way you suggest.
 
Sarra Sakka
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Do you mean like this:
but, that's no what i want :/

test.png
[Thumbnail for test.png]
That the result with a form
test2.png
[Thumbnail for test2.png]
And this without form
 
Ulf Dittmer
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Why isn't that what you want?
 
Sarra Sakka
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I want the result like the second picture.
And when i use form, the first picture that what i get .
If i use the form tag the picture will change :/
 
Ulf Dittmer
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I'm certain there is a way of turning off repeated background images. Consult an HTML reference for how to do that.
 
Sarra Sakka
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Yes, there's a way to turning off repeated background image and i tried it

Now, the image completly disappear :/
 
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