I'm actually using a SqlDataSource which sets the type for the xml parameter
as "Object". However, I have tried 3 different methods of inserting the data
in the formview ItemInserting event) and have received exceptions for each:
XDocument responseXML = XDocument.Load(tr);
1) e.Values["Response_Xml"] = responseXML.ToString();
--> Exception: "Operand type clash: sql_variant is incompatible
with xml"
2) e.Values["Response_Xml"] = new SqlXml(responseXML.CreateReader());
--> Exception: "Operand type clash: sql_variant is incompatible
with xml"
3) e.Values["Response_Xml"] = responseXML;
--> Exception: "No mapping exists from object type
System.Xml.Linq.XDocument to a known managed provider native type."
I discovered the answer. If using a SqlDataSource on a FormView, within the
..aspx page change the Parameter type from Object to String. Then, set the
value of the XML column to the string of the XDocument value: