XmlDocument CreateElement without xmlns under a prefixed element

Question

I\'m trying to compose a SOAP request to ebay FindingAPI web service by using C# XmlDocument class in the following code:

XmlDocument doc = new XmlDocument()         


        

Answer 1

Because your document has default namespace declared in the most outer element you have to repeat that namespace on every child element to avoid adding additional empty one.

Change request and param elements declaration to contain "http://www.ebay.com/marketplace/search/v1/services" namespace

XmlElement request = (XmlElement)body.AppendChild(doc.CreateElement("findItemsByKeywordsRequest", "http://www.ebay.com/marketplace/search/v1/services"));
XmlElement param = (XmlElement)request.AppendChild(doc.CreateElement("keywords", "http://www.ebay.com/marketplace/search/v1/services"));

With these changes your code produces following XML:

<soap:Envelope xmlns="http://www.ebay.com/marketplace/search/v1/services" xmlns:soap="http://www.w3.org/2003/05/soap-envelope">
    <soap:Header />
    <soap:Body>
        <findItemsByKeywordsRequest>
            <keywords>harry potter phoenix</keywords>
        </findItemsByKeywordsRequest>
    </soap:Body>
</soap:Envelope>