unknownsoul
Posts: 2
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| Posted: 04/28/2004, 7:04 PM |
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Hi there.
I need to know how to auto calculate the period of a device used whenever the user change a field of "installed date".
Example:
Date installed : {install_date}
Lifespan : {age}
Whenever the user changes the value in the install_date field, age age field will automatically calculated based on the current date.
Thanks.
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Mark
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| Posted: 04/28/2004, 8:29 PM |
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You could place this in (DateAdd("h","+17", Now)) to your {age} field
That's adding 17 hrs, but you can convert that to months or days
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peterr
Posts: 5971
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| Posted: 04/28/2004, 9:58 PM |
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In case you want to do this in real-time (as users enter the date) then you may need to use Javascript for tshi. There are many examples on the net:
http://www.google.com/search?q=javascript+calculate+date+age
http://www.google.com/search?q=javascript+calculate+date+age
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unknownsoul
Posts: 2
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| Posted: 04/29/2004, 12:36 AM |
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Thanks guys. Just 1 more question...
How do I do this with codecharge? I mean, how to embed the javascript within asp? Coz I need to insert the calculated age into the database.
I'm a newbie, pls bear with me... 
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peterr
Posts: 5971
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| Posted: 04/29/2004, 12:51 AM |
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You can place the JavaScript directly in HTML. Usually those articles that you find on Google will help you understand how to modify the HTML, although you also may need to understand some JavaScript basics. I actually don't know JavaScript but many times I copied some sample JavaScript from other articles into my HTML. Whether you do this in CCS or not, the method is the same.
The JavaScript code should update the value on the page, so that when users submit it, the ASP page will receive it and will record that value in the database. This is exactly the same as if a user entered the value into the field but instead you let JavaScript do this.
An alternative is not to use JavaScript and simply calculate the Age value in ASP after install_date is submitted, as Mark proposed. See:
http://www.google.com/search?q=vbscript+functions+DateAdd
_________________
Peter R.
YesSoftware Forums Moderator
For product support please visit http://support.yessoftware.com |
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desman
Posts: 11
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| Posted: 04/30/2004, 5:12 AM |
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Use Marks suggestion, that's all dynamic server side, just remember to quote "" the script in CCS
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