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POShould I disable WebClient caching?
 

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  1. POShould I disable WebClient caching?
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    <p>WebClient.DownloadStringAsync does cache the server response. After once getting a response from the server I get a response even without internet connection!</p> <p>Is WebClient caching smart enough to determine from the server response how long to cache? Or is it buggy and I should disable caching.</p> <p>Backgound info:</p> <p>Url: <a href="http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml" rel="nofollow">http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml</a></p> <p>Fiddler trace:</p> <p>GET /stats/eurofxref/eurofxref-daily.xml HTTP/1.1 Accept: <em>/</em> Referer: file:///Applications/Install/4D0DF1F7-1481-45CA-86BE-C14FF5CCD955/Install/ Accept-Encoding: identity User-Agent: NativeHost Host: www.ecb.europa.eu Connection: Keep-Alive</p> <p>HTTP/1.1 200 OK Date: Sun, 25 Mar 2012 08:54:40 GMT Server: Apache/2.2.3 (Linux/SUSE) Last-Modified: Fri, 23 Mar 2012 13:31:39 GMT ETag: "19d4e5-6a9-4bbe90b5904c0" Accept-Ranges: bytes Content-Length: 1705 Keep-Alive: timeout=3, max=200 Connection: Keep-Alive Content-Type: text/xml Set-Cookie: BIGipServerPOOL.www.ecb.europa.eu_HTTP=2684883628.16415.0000; path=/ ...</p> <p>Disabling caching via Headers does not work:</p> <p>.Headers("cache-control") = "no-cache" .Headers("HttpRequestHeader.IfModifiedSince") = DateTime.UtcNow.ToString()</p> <p>Disabling caching via appending uniqa parameter works:</p> <p>"http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml" &amp; "?MakeRequestUnique=" &amp; Environment.TickCount</p>
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    1. USPeter Meinl
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      1. POShould I disable WebClient caching?
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    1. COPossible duplicate: http://stackoverflow.com/questions/5173052/how-do-you-disable-caching-with-webclient-and-windows-phone-7
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      1. POShould I disable WebClient caching?
      1. USDmitry Reznik
    2. CONot a duplicate: I would like to know "if" I should disable the cache and not how. I is not clear to me, what algorithm the phone WebClient phone uses for caching.
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      1. POShould I disable WebClient caching?
      1. USPeter Meinl
 

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