xml.LoadData – Data at the root level is invalid. Line 1, position 1

by

The hidden character is probably BOM.
The explanation to the problem and the solution can be found here, credits to James Schubert, based on an answer by James Brankin found here.

Though the previous answer does remove the hidden character, it also removes the whole first line. The more precise version would be:

string _byteOrderMarkUtf8 = Encoding.UTF8.GetString(Encoding.UTF8.GetPreamble());
if (xml.StartsWith(_byteOrderMarkUtf8))
{
    xml = xml.Remove(0, _byteOrderMarkUtf8.Length);
}

I encountered this problem when fetching an XSLT file from Azure blob and loading it into an XslCompiledTransform object.
On my machine the file looked just fine, but after uploading it as a blob and fetching it back, the BOM character was added.

More Related Contents:

  1. Convert XML String to Object
  2. How do I convert an ISO8601 TimeSpan to a C# TimeSpan?
  3. Read a XML (from a string) and get some fields – Problems reading XML
  4. How to convert XML to JSON using C#/LINQ?
  5. Memory Leak using StreamReader and XmlSerializer
  6. Create folder and file on Current user profile, from Admin Profile
  7. Dynamically generate LINQ queries
  8. How do you remove invalid hexadecimal characters from an XML-based data source prior to constructing an XmlReader or XPathDocument that uses the data?
  9. How to deal with XML in C#
  10. Get the XPath to an XElement?
  11. Set up dot instead of comma in numeric values
  12. Why doesn’t XmlSerializer support Dictionary?
  13. Create XML Nodes based on XPath?
  14. How do I add C# methods to an existing large wix script
  15. How can I set the WiX installer version to the current build version?
  16. get line number for XElement here
  17. Entity Framework with XML Files [closed]
  18. XML Parsing – Read a Simple XML File and Retrieve Values
  19. Suppress Null Value Types from Being Emitted by XmlSerializer
  20. FileMode.Open and FileMode.OpenOrCreate difference when file exists? c# bug?
  21. Generating XML file using XSD file
  22. parsing XML with ampersand
  23. Serializing Lists of Classes to XML
  24. Check well-formed XML without a try/catch?
  25. XmlSerializer Performance Issue when Specifying XmlRootAttribute
  26. How to deserialize only part of an XML document in C#
  27. Dealing with invalid XML hexadecimal characters
  28. Reading XML with an “&” into C# XMLDocument Object
  29. What is the best way to parse large XML (size of 1GB) in C#?
  30. XPathSelectElement always returns null

Leave a Comment