.NET: Posting Xml to a web-server? -

what proper way post xmldocument web-server? here skeleton function:

public static void postxml(xmldocument doc, string url) {     //todo: write } 

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right use:

//warning: not use postxml implmentation //it doesn't adjust xml match encoding used webclient public static void postxml(xmldocument doc, string url) {    using (webclient wc = new webclient())    {       wc.uploadstring(url, documenttostr(doc));    } } 

where documenttostr valid , correct method:

/// <summary> /// convert xmldocument string /// </summary> /// <param name="doc">the xmldocument converted string</param> /// <returns>the string version of xmldocument</returns> private static string documenttostr(xmldocument doc) {     using (stringwriter writer = new stringwriter())     {        doc.save(writer);        return writer.tostring();     } } 

the problem implementation of postxml posts string exactly is. means (in case) http request is:

post https://stackoverflow.com/upload.php http/1.1 host: stackoverflow.com content-length: 557 expect: 100-continue  <?xml version="1.0" encoding="utf-16"?> <accuspeeddata macaddress="00252f21279e" date="2010-10-07 10:49:41:768">   <secret sharedkey="1234567890abcdefghijklmnopqr" />   <registerset timestamp="2010-10-07 10:49:41:768">     <register address="total:power" type="analog" value="485" />     <register address="total:voltage" type="analog" value="121.4" />     <register address="total:kva" type="analog" value="570" />   </registerset> </accuspeeddata> 

you'll notice xml declaration has incorrect encoding:

<?xml version="1.0" encoding="utf-16"?> 

the webclient not sending request in utf-16 unicode, how strings in .net stored. don't know encoding used webclient.

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the http post of xml needs encoded, happens during call to:

save(textwriter) 

during call save xmldocument object adjust xml-declaration based on encoding of textwriter being asked save to. unfortunately webclient doesn't expose textwriter can save xmldocument to.

see also

• post xml .net web service
• http post of xml string , save .xml on server (django/gae)
• send xml via http post ip:port
• msdn: xmldocument.save method (textwriter)
• sending gzipped data in webrequest?
• c# web request post encoding question
• getrequeststream throws timeout exception randomly
• writing xml utf-8 encoding using xmltextwriter , stringwriter

there's solution. subclass stringwriter:

public class stringwriterwithencoding : stringwriter {   encoding encoding;    public stringwriterwithencoding (stringbuilder builder, encoding encoding) :base(builder)   {     this.encoding = encoding;   }    public override encoding encoding   {     { return encoding; }   } }