read write InfoPath with XmlDocument

AntonM — Tue, 03 Jun 2008 18:28:32 GMT

Hi All,

I try to read and save an InfoPath document which is signed with a digital signature.

We use InfoPath 2003 SP3.

Here some code I tried:

string xmlContent = File.ReadAllText("sample.xml");

File.WriteAllText("sample_2.xml", );

Works fine!

XmlDocument xdoc = new XmlDocument();

string xmlContent = File.ReadAllText("sample.xml"); xdoc.LoadXml(xmlContent);

File.WriteAllText("sample_2.xml", xdoc.OuterXml);

When I open the sample_2.xml I get an error that sounds like that (translated from German):

All or one signature could not be verified...

I tried some other Writer classes like StringWriter, XmlTextWriter or StreamWriter, but I get always the same error.

I think it is an encoding issue. So if I compare these two files with winDiff, there are many differences.

Could someone tell me please how to write a valid InfoPath xml document without have impact on the existing signatures. Which Encoding uses the OuterXML property?

Thanks a lot,

Anton

Code

read write InfoPath with XmlDocument