CODEWITHSUNDEEP
c#javascriptpost
Makah
Makah

Reputation: 4513

Download file by Javascript postback in C#

EDIT: I´ll be more specific. I want to do a script to download a group of files every day. To do this programmatically, i need to click in a javascript button. It´s simple when is just put the URL in WebRequest class, but in javascript button i don´t have the URL. How can i mount this URL?

Request (by Fiddler):

POST /SomeSite?Something.aspx HTTP/1.1
Accept: text/html, application/xhtml+xml, */*
Referer: http://www.Site.com/Stackoverflow/SomeSite?Something.aspx
Accept-Language: pt-BR
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
Host: www.Site.com
Content-Length: 10616
Connection: Keep-Alive
Pragma: no-cache
Cookie: idioma=pt-br; WT_FPC=id=187.16.81.13-3324702672.30186643:lv=1320587789589:ss=1320587578749

__EVENTTARGET=ctl00%24contentPlaceHolderConteudo%24lnkDownloadArquivo&__EVENTARGUMENT=&__VIEWSTATE=%BlaBlaBla

Upvotes: 1

Views: 2473

Answers (2)

Syed Bashar
Syed Bashar

Reputation: 116

Here you can see the _EVENTTARGET that is using postback with a link Button which name is "lnkDownloadArquivo". So far I understand you want to simulate same download request without button click. if so then you can check here a solution . http://ciintelligence.blogspot.com/2011/01/fetching-aspnet-authenticated-page-with.html. here you can get idea how asp.net button post back request works.

Upvotes: 1

Ry-
Ry-

Reputation: 224904

The built-in class you need is the HTTPWebRequest (or WebRequest) class. To create one, call System.Net.WebRequest.Create() and pass your URL, add the appropriate headers using the Headers collection, write to the Stream retrieved from WebRequest.GetRequestStream(), then retrieve the response using WebRequest.GetResponse(). From the retrieved response object, you can get the response Stream using WebResponse.GetResponseStream(). The Stream can then be read from like any other Stream object.

Upvotes: 0

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