What is the use of Responce.AppendHeader(string name,string value )

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Hi friends
i am working on some project,there i got this methdod( Responce.AppendHeader(string name,string value )) in the page load
Thank u in advance

Posted 25-Jun-14 19:32pm

yedhuvamshi

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Raje_ 26-Jun-14 2:13am

Adds an HTTP header to the output stream.

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SibeeshKV · Answer 1 · 2014-06-25T20:31:00

If you use the AppendHeader method to send cache-specific headers and at the same time use the cache object model (Cache) to set cache policy, HTTP response headers that pertain to caching (Cache-Control, Expires, Last-Modified, Pragma, and Vary) might be deleted when the cache object model is used. This behavior enables ASP.NET to maintain the most restrictive settings. For example, consider a page that includes user controls. If those controls have conflicting cache policies, the most restrictive cache policy will be used. If one user control sets the header "Cache-Control: Public" and another user control sets the more restrictive header "Cache-Control: Private" via calls to SetCacheability, then the "Cache-Control: Private" header will be sent with the response.

Ref
http://msdn.microsoft.com/en-us/library/system.web.httpresponse.appendheader(v=vs.110).aspx[^]

Sergey Alexandrovich Kryukov · Answer 2 · 2014-06-25T20:33:00

First thing which comes to my mind: if you don't know why appending a header, you probably don't need it for your project (which you did not bother to talk about) :-).

I cannot understand why so clear original MSDN documentation needs some extra explanations: http://msdn.microsoft.com/en-us/library/system.web.httpresponse.appendheader%28v=vs.110%29.aspx[^].

Probably the only reason of such question could be this: you have no idea why the headers are used at all. It would mean that you should learn how HTTP works, and, in particular, the role of those headers:
http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol[^],
http://en.wikipedia.org/wiki/List_of_HTTP_header_fields[^].

—SA

What is the use of Responce.AppendHeader(string name,string value )

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