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c#xmldocument

Set XML string using node.innerXML - use of prefix causes error

I am creating a huge xml from DB and most of it's part is hard-coded(pre-defined values),so I decided to create string using StringBuilder and assigning it to node's InnerXML but prefix used for one of the attribute is not allowing me to set the string stating "Prefix not declared".

XMLNode addr = DocumentElement.createElement("element","address",null);
addr.InnerXML = "<test><s1>ttt</s1><s2 xsi:type="test">yyy</s2></test>";

prefix xsi is causing the error here. Is there any workaround for this.

Solution

  • The workaround is:

    Firstly simply create XMLDocument and assign plain innerXML without namespace and prefixes as 

      XmlDocument ccda_xDoc = new XmlDocument();
  ccda_xDoc.LoadXml("<ClinicalDocument></ClinicalDocument>");

  XmlElement root = ccda_xDoc.DocumentElement;
  root.InnerXml = @" My XML String without Prefix for any namespace";

    Then Search for the node where you want to apply prefix to and add attribute with prefix:

    XmlNode xsiValue = root.SelectSingleNode("encounter/code[@code='99201']");
XmlAttribute xsitype = structuredBody.CreateAttribute("sdtc", "valueSet", "urn:hl7-org:sdtc");
xsitype.Value = "2.16.840.1.113883.3.464.1003.101.12.1047";
xsiValue.Attributes.Prepend(xsitype);

    Finally Apply namespaces to root node as : 

    ccda_xDoc.DocumentElement.SetAttribute("xmlns", "urn:hl7-org:v3");
ccda_xDoc.DocumentElement.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
ccda_xDoc.DocumentElement.SetAttribute("xmlns:voc", "urn:hl7-org:v3/voc");
ccda_xDoc.DocumentElement.SetAttribute("xmlns:sdtc", "urn:hl7-org:sdtc");