We Keep Coding

System.InvalidOperationException: 'There is an error in XML document (0, 0).'

I am trying to deserialize a file, none of the other solutions are working for me.
This is the code. I get the error on the 'customerList' line
using (StreamReader customerStreamReader =
new StreamReader(#"C:\...\ShoppingApplication\bin\Debug\Customer.xml"))
{
customerList = (List<Customer>)customerSerializer.Deserialize(customerStreamReader);
}

Look into using XDocument instead for it will be more robust in reporting errors, though the 0,0 location is a common one. Avoid using streams because they are so, .Net 2.
Here is an example:
var doc = XDocument.Load(#"C:\...\ShoppingApplication\bin\Debug\Customer.xml");
Console.WriteLine(doc);
Then extract what is needed from the actual nodes.

For anybody coming here from google:
If you do not want to use XDocument, then you must make sure that your .xml is NOT empty. Once I added something, I was able to deserialize it just fine. Hope this helps!

Parsing a XML response back to JSON

I'm working on project where i have to make an API request. When I post a JSON request to the server I get the following XML as response:
"<response>
\r\n
<data>
\r\n
<status no=\"0\" substatus=\"0\">
Connection succeeded
</status>\r\n
</data>
\r\n
</response>"
I need to convert the response back to JSON. But when I try to parse it i'm getting an error saying
'Unexpected character encountered while parsing value: <. Path '',
line 0, position 0.'
I'm using NewtonSoftJSON for conversion.
This is the code I'm using to convert the XML string back to JSON:
var response = JsonConvert.DeserializeXmlNode(xmlResponse);
How can I achieve this?

I would be highly confused by any webapi that expect JSON as input and return XML as its response. But if that is really what you're looking at then you need to take the approach in Serializing that XML response into either an XmlDocument or the newer XDocument/XNode and then Serialize an instance of one of those into JSON.
The XmlDocument type has a Load method that consumes a XmlReader. (it also offers a LoadXml but I wanted to show several options here).
The XDocument type has a Parse method that consumes a string with XML.
Based on your example input you can use two approaches:
var xml = #"<response>
<data>
<status no=""0"" substatus=""0"">
Connection succeeded
</status>
</data>
</response>";
// xmldocument
var xmlReader = XmlReader.Create(new StringReader(xml));
var doc = new XmlDocument();
doc.Load(xmlReader);
var response = JsonConvert.SerializeXmlNode(doc);
response.Dump("XMLDoc to Json "); // LINQPad output
// or XDOcument
response = JsonConvert.SerializeXNode(XDocument.Parse(xml));
response.Dump("XDocument to Json");// LINQPad output
And this will be the result:

There is no direct conversion from XML to JSON. And you should be using a XML parser for this response.
Parsing XML (C#) :
https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/linq/parsing-xml
I also suggest reading a little bit more about serialization, since this question actually makes no sense.

I have figured out the issue. rene's answer helped to figure out the how to convert from xml to json. But the issue was with my response. I was able to fix it by removing the /" and unwanted double quotes from the response.
response = response.Replace("<response>\"", "<response>")
.Replace("\"<response>", "<response>")
.Replace("\\", "")
.Replace("rn", string.Empty);
var xmlReader = XmlReader.Create(new StringReader(response));
var doc = new XmlDocument();
doc.Load(xmlReader);
var jsonResponse = JsonConvert.SerializeXmlNode(doc);

Response.ContentType = "text/xml" causes XML attributes construct error

I have a C# ashx handler that will do some processes and then generate an XML output which should be parsed and sent to the server.
The problem is when I try to set the context Response to txt/xml it will generate the following error:
This page contains the following errors:
error on line 1 at column 226: attributes construct error
Below is a rendering of the page up to the first error
It may look that the problem is with generated XML which may be not formatted well, but I've checked that by getting the output as a string then I used a validator and it was fine.
Any suggestions please to figure it out?
XML Output:
<Response>
<GetDigits action='http://domain/Handler.ashx?ivrlevel=9&language=arb&isOperation=false&dayFrom=3&dayTo=3&hourFrom=12&hourTo=2&minFrom=30&minTo=20&enteredMobileNumber=66355356'>
<Play>http://domain/AllClips/enterednumberis_arb.mp3</Play>
<Play>http://domain/AllClips/6.mp3</Play>
<Play>http://domain/AllClips/6.mp3</Play>
<Play>http://domain/AllClips/3.mp3</Play>
<Play>http://domain/AllClips/5.mp3</Play>
<Play>http://domain/AllClips/5.mp3</Play>
<Play>http://domain/AllClips/3.mp3</Play>
<Play>http://domain/AllClips/5.mp3</Play>
<Play>http://domain/AllClips/6.mp3</Play>
<Play>http://domain/AllClips/numberconfirmation_arb.mp3</Play>
</GetDigits>

Need to parse a xml string

I need to a parse an xml string(.NET, C#) which , unfortunately, is not well formed.. the xml stream that i am getting back is
<fOpen>true</fOpen>
<ixBugParent>0</ixBugParent>
<sLatestTextSummary></sLatestTextSummary>
<sProject>Vantive</sProject>
<ixArea>9</ixArea>
I have tried using a xml reader, but its crashing out because it thinks ,and rightfully so, there are 2 node elements wheneever it tries to parse
Is there something that I can do with this ? I cant change the XML, cause I have no control of the code that sends the XML back ..
Any help, would be appreciated.
Thanks and Regards
Gagan Janjua

I think you can use the XmlParserContext in one of the XmlTextReader overloads to specify that the node type is an XmlNodeType.Element, similar to this example from MSDN (http://msdn.microsoft.com/en-us/library/cakk7ha0.aspx):
XmlTextReader tr = new XmlTextReader("<element1> abc </element1>
<element2> qrt </element2>
<?pi asldfjsd ?>
<!-- comment -->", XmlNodeType.Element, null);
while(tr.Read()) {
Console.WriteLine("NodeType: {0} NodeName: {1}", tr.NodeType, tr.Name);
}

What you are getting back is a well-formed XML fragment but as you pointed out, not a well-formed XML document. Can you
wrap a top-level element around the returned elements? or
reference the returned XML fragment as an external entity from within a shell XML document, and pass the shell document to the XML reader?

Exception when trying to deserialize a xml file

Im trying to deserialize an XML file with XmlSerializer, however im getting this exception:
"There is an error in XML document (1,
2)" The innerexception is:
"<Mymessage
xmlns='http://MyMessages/'> was not
expected."
Which is the very first line in the XML file. my guess is that it has something to do with the xmlns.
I tried to ask Google, and then tried to add the following line to my code
[XmlRoot("MyMessage", Namespace="'http://MyMessages/")]
But I still get the same exception.

In the constructor of the XmlSerializer i needed to specify a default namespace, after doing that everything worked just fine

Please provide the full XML file code to help understand the issue better.
Also put this as the first line in the xml file and see if this solves the issue
<?xml version="1.0" encoding="utf-8"?>

Further to CruelIO's response, I resolved the error by adding:
[XmlRoot("RenderResult", Namespace = "http://mynamespace.uri.org")]
to the class that I was trying to deserialize. e.g: the serialization code was:
RenderResult result;
using (var memoryStream = new MemoryStream(data))
{
var xmlSerializer = new XmlSerializer(typeof(RenderResult));
result = (RenderResult)xmlSerializer.Deserialize(memoryStream);
}
and my class looked like this:
[XmlRoot("RenderResult", Namespace = "http://mynamespace.uri.org")]
public class RenderResult
{
}

It sounds like you have a borked xml file. Easy ways to find out:
try loading it into an xml viewer
or just make sure it has a .xml extension and load in VS or IE
or run xsd.exe over it
If they complain, then the xml is certainly corrupt.
If they work fine, and display your data, then you probably have the serialization attributes wrong. Try using xsd.exe with the "/classes" switch to see what it would do with it...