Ability to view document prior to submitting it

Question

Hi All, 
 
 Currently I have an interface where we allow the user to upload documents, we wanted to see if it was possible after the user clicks upload they can see the actual document before the submit the form, that way they "make sure" it is the correct document. Is this possible in appian at all? 
 
 thanks in advance

velac · Answer

Yes, you can utilize the a!documentViewerField component to display the document the user just uploaded 
 Read more here: docs.appian.com/.../Document_Viewer_Component.html

Soma · Answer

Yes you can do that in Appian with a!submitUploadedFiles(). If you pass the documentId to documentViewerField directly, it will not render the document. 
 a!localVariables(
 local!document,
 local!showPreview: false,
 {
 a!fileUploadField(
 target: FOLDER
 value: local!document,
 saveInto: local!document
 ),
 a!richTextDisplayField(
 showWhen: a!isNotNullOrEmpty(local!document),
 value: a!richTextItem(
 text: "Preview Document",
 link: a!dynamicLink(
 saveInto: a!submitUploadedFiles(
 onSuccess: a!save(
 local!showPreview,
 true
 )
 )
 )
 )
 ),
 a!documentViewerField(
 height: "TALL",
 showWhen: local!showPreview = true,
 document: local!document
 )
 }
)

Mike Schmitt · Answer

Note this will NOT work for a freshly-uploaded document on a User Input Task which the user has not yet submitted. The designer would, at the very least, need to require the user to submit the form (to get the document moved into the accessible internal filesystem), then loop back to (a new copy of) the same task, in which the document can be displayed. 
 velac said: you can utilize the a!documentViewerField component to display the document the user just uploaded

Mike Schmitt · Answer

Soma said: Yes you can do that in Appian with a!submitUploadedFiles(). 
 FYI, a!submitUploadedFiles() is specifically disabled in User Input Tasks and Start Forms. The approach you list here would work if the document upload is done on a Record or Site (though these areas are not usually recommended for this), but not in a regular process form of any type.

Ability to view document prior to submitting it

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