Sending email attachments via UWP EmailManager not working -


sending attachment universal app following code not working, why?

        dim emailmessage new emailmessage()         emailmessage.[to].add(new emailrecipient("a@b.com"))         emailmessage.subject = "test"         emailmessage.body = "hello world"          dim localappfolder = windows.storage.applicationdata.current.localfolder         dim file = await localappfolder.createfileasync("somefile.txt", windows.storage.creationcollisionoption.replaceexisting)         await windows.storage.fileio.writetextasync(file, "aaaa")         dim fileref = randomaccessstreamreference.createfromfile(file)         emailmessage.attachments.add(new emailattachment(file.name, fileref))         await emailmanager.showcomposenewemailasync(emailmessage) 

to, subject , body show fine in outlook, attachment missing: outlook screenshot

i believe because outlook desktop app. understood, emailmanager.showcomposenewemailasync uses mailto: protocal launch mail client app , use share provide email content.

if choose mail store app when select default app dialog launches, able see attachment following: enter image description here

if have chosen desktop outlook app default mailto protocol, have change default app mailto: protocol association in control panel .

previously, showcomposenewemailasync works windows phone runtime app. , not up-to-date in document, because doesn't include win 10 support.

on windows 10 mobile, works without problem. on windows desktop, have choose store app.


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