Clear photo field contents

[ianburgess]

I have a form with a file upload button that uploads a photo. The filename is saved in USE:Photo, and there is a "Display" control on the form that displays a thumbnail of the photo, and all works fine.

The problem is that I want a "Clear" button that removes the contents of the USE:Photo field.  I have put a button on the form and in the Client side embed, I have put:
USE:Photo=''
p_web.SSV('USE:Photo',USE:Photo)

I have also "RESET" the display of USE:Photo on the clear button.

When I click on the Clear button, the thumbnail and filename are cleared on screen, but when the form is Saved, the empty USE:Photo field is not saved, so when you reopen the form, the photo is still there.

What am I doing wrong?

Thanks

Ian

[Bruce]

you can't just clear the field to clear the underlying value in the case of a file upload.
Because let's say you were just editing the record, and not re-submitting the image, you wouldn't want the image to be cleared.

So you'll need another field on the form, maybe a checkbox, that you can check when the form is saved. Ie in PreUpdate
if loc:clearPic = 1
  fil:pic = ''
end

cheers
Bruce

[ianburgess]

Thanks Bruce

I tried that and it worked but I had to embed in "ValidateAll" as the "PreUpdate" was not run when saving for some reason.

Thanks

Ian

[Bruce]

sorry - I meant ValidateUpdate, not PreUpdate. (Validaterecord is fine.)

cheers
Bruce