C# .NET Core 6: Get rootname, namespace or DTD using xmlreader
using (var stream = new MemoryStream())
{
FormFile?.CopyTo(stream);
stream.Seek(0, SeekOrigin.Begin);
var settings = new XmlReaderSettings()
{
// Parse file but do not reolve
DtdProcessing = DtdProcessing.Parse,
XmlResolver = null
};
using (var reader = XmlReader.Create(stream, settings))
{
var done = false;
while (reader.Read() && !done)
{
// something weird happened, bail out
//if (reader.EOF)
// return;
switch (reader.NodeType)
{
// Assume cXML
case XmlNodeType.DocumentType:
DocumentType = reader.GetAttribute("SYSTEM") + "";
break;
case XmlNodeType.Element:
switch (reader.LocalName)
{
// Assume an UBL dpcument of some kind
case "CustomizationID":
reader.Read();
SetCustomization(reader.Value);
break;
// Only OIOUBL, done and exit
case "UBLlVersionID":
reader.Read();
UblVersion = reader.Value;
done = true;
break;
// Only OIOXML, done and exit
case "TypeCode":
reader.Read();
TypeCode = reader.Value;
done = true;
break;
default:
if (string.IsNullOrEmpty(RootName))
{
RootName = reader.Name;
SetNamespace(reader.NamespaceURI);
}
break;
}
break;
}
}
reader.Close();
}
}