Vinicius Schonardie
Rank: #5497
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Solved
Server cannot set content type after HTTP headers have been sent - Excel
Question
Import/Export Data

Doing recordlist to excel and trying to download but receiving this message:

Server cannot set content type after HTTP headers have been sent.

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on 2017-12-20
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Kilian Hekhuis
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Solution

Hi Vinicius,

You are probably trying a download in a Screen Action that is called from a Button or Link with Method Ajax Submit. This isn't possible (this is a limitation of HTTP). You need a Button with Method Submit (not Ajax).

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on 2017-12-20
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hanafi
Rank: #25313

Thanks @Kilian Hekhuis, i found the answer from my problem

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on 2018-11-05
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Kilian Hekhuis
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Hi Hanafi,

Glad I could be of help :). Happy coding!

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on 2018-11-05
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Mitsunobu Matsuka
Rank: #19982

Kilian Hekhuis wrote:

Hi Hanafi,

Glad I could be of help :). Happy coding!

 Hi, sorry to interrupt you. You said "You need a Button with Method Submit (not Ajax) ". Is this applicable to a button in an Web Block?

I will appreciate your reply since I am a starter....

 

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on 2020-09-16
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Kilian Hekhuis
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Hi Mitsunoba,

If you want to download a file, you need to trigger it with a Button that's set to Submit, otherwise it won't work. Whether or not it's in a Web Block is of no concern, since ultimately, the Web Block is just part of the page.

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on 2020-09-16
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