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I haven't done any Windows 7 development, so I am wondering why you are using the WebClient, instead of adding a web reference, and using the generated proxy to call a web method?
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The main reason is I expect this to be ported to Android and as such I don't want to be tied into a Microsoft environment. &nbsp;If I stay with WebClient / URI's that will convert easier. &nbsp;Also I'm not writing the web service side of things - this is a traditional ASP web site.
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I have implemented the web post using the following :-<br />
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string webServiceURL = IsolatedStorageHelper.GetO<wbr />bject&lt;stri<wbr />ng&gt;(&quot;blu3s<wbr />erver&quot;);<br />
string page = &quot;whereabouts_update.aspx&quot;;<wbr /><br />
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// Now issue an asynchronous request to post updated data back to the server<br />
Uri serviceUri = new Uri(webServiceURL + page, UriKind.Absolute);<br />
WebClient webClient = new WebClient();<br />
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// Upload this to the server<br />
webClient.UploadStringComp<wbr />leted += new UploadStringCompletedEvent<wbr />Handler(we<wbr />bClient_Up<wbr />loadString<wbr />Completed)<wbr />;<br />
webClient.UploadStringAsyn<wbr />c(serviceU<wbr />ri ,xDocument.ToString(SaveOp<wbr />tions.Disa<wbr />bleFormatt<wbr />ing));<br />
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Which seems to work - I have a dummy .aspx file which does nothing but in the webClient_UploadStringComp<wbr />leted event there are no errors returned. &nbsp;My continuing problem is <br />
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1&gt; How do I recover the posted data in the target web page<br />
2&gt; If there is an error how does the target web page report this to the caller?<br />
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Probably obvious but not so far to me!
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I don't understand what you mean by &quot;&nbsp;How do I recover the posted data in the target web page&quot;...
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I have an application which is sent an XML Document from a web page. &nbsp;The idea is to act on this XML file, update it as necessary and then send the file back. &nbsp;Now the initial send is done from a web page using Response.Write and is read by a C# WebClient object. &nbsp;All good so far.<br />
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However I'm not sure how best to send the resultant XML file back to the web service. &nbsp;I am working in a Windows Mobile 7 application and would prefer to use the WebClient object. &nbsp;<br />
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I have constructed the XML file (including some embedded images as CData sections) and effectively just want to call a URL passing the XML in some form. &nbsp;Obviously not as a query string but how?
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I have an application which is sent an XML Document from a web page.  The idea is to act on this XML file, update it as necessary and then send the file back.  Now the initial send is done from a web page using Response.Write and is read by a C# WebClient object.  All good so far.

However I'm not sure how best to send the resultant XML file back to the web service.  I am working in a Windows Mobile 7 application and would prefer to use the WebClient object.  

I have constructed the XML file (including some embedded images as CData sections) and effectively just want to call a URL passing the XML in some form.  Obviously not as a query string but how?

WebClient sending an XDocument

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.