Develop Reference

SqlXml removes XML header when comes from string

I'm developing a web app with C# and MVC4. Currently I'm working in converting string vars to SqlXml files. I have a XML file with this structure:
<?xml version="1.0" encoding="utf-8"?>
<cfdi:Comprobante xsi:schemaLocation="http://www.sat.gob.mx/cfd/3 http://www.sat.gob.mx/sitio_internet/cfd/3/cfdv32.xsd http://www.sat.gob.mx/TimbreFiscalDigital http://www.sat.gob.mx/TimbreFiscalDigital/TimbreFiscalDigital.xsd" xmlns:tfd="http://www.sat.gob.mx/TimbreFiscalDigital" version="3.2" xmlns:cfdi="http://www.sat.gob.mx/cfd/3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
</cfdi:Comprobante>
I'm converting the above file to string successfully and then I'm usign the following code that converts a string to a SqlXML.
cfdiDocumento.CFDIXML = Serializar.XMLToSqlXml(comprobante);
Where cfdiDocumento.CFDIXML is a SqlXml var, Serializar.XMLToSqlXml(comprobante) method receives a string and executes the following code:
public static SqlXml XMLToSqlXml(string xmlString)
{
SqlXml sqlXmlFiltro = null;
if (xmlString != null)
{
StringReader sr = new StringReader(xmlString);
XmlReaderSettings settings = new XmlReaderSettings();
settings.ConformanceLevel = ConformanceLevel.Auto;
XmlReader reader0 = XmlReader.Create(sr, settings);
sqlXmlFiltro = new SqlXml(reader0);
}
return sqlXmlFiltro;
}
When the code finishes successfully, the file is correct but is removing the xml header
<?xml version="1.0" encoding="utf-8"?>
The question is: How do I preserve the xml header when convierting to SqlXml var?

If you cannot change the type of your SqlXml attribute, you could try converting the SqlXml to xml document to append xml declaration and get the outer xml:
public string SqlXmlToString(SqlXml sqlXml)
{
XmlDocument doc = new XmlDocument();
doc.Load(sqlXml.CreateReader());
// Create XML declaration with your encoding.
XmlDeclaration xmldecl;
xmldecl = doc.CreateXmlDeclaration("1.0", null, null);
xmldecl.Encoding = "UTF-8";
// Add to the document the created declaration
XmlElement root = doc.DocumentElement;
doc.InsertBefore(xmldecl, root);
return doc.OuterXml;
}
Hope this is helpfully

Appending XElement to existing XDocument

I have the following XML string in database.
<?xml version="1.0" encoding="utf-16"?>
<ServiceList>
<Service>
<COMPAT>2</COMPAT>
<EQUIPID>0</EQUIPID>
<TITLE>Collect Call and SMS</TITLE>
<SMSCOMMAND>0</SMSCOMMAND>
<DIALCOMMAND>123</DIALCOMMAND>
<DEACTIVATIONCOMMAND>0</DEACTIVATIONCOMMAND>
<MODE>Dial</MODE>
<DETAIL>Here you go.</DETAIL>
<IMAGE>2014-16-9--16-28-25</IMAGE>
<LONGDESC>
<![CDATA[<p>P<br />P<br />P </p>]]>
</LONGDESC>
<Mechanism>
<Title>Mech Title</Title>
<Description>Here you go.</Description>
<Trigger>Mech Trigger</Trigger>
<Controls>1</Controls>
</Mechanism>
</Service>
</ServiceList>
I need to add/appened the following element inside ServiceList
<Service>
<COMPAT>2</COMPAT>
<EQUIPID>0</EQUIPID>
<TITLE>Collect Call and SMS</TITLE>
<SMSCOMMAND>0</SMSCOMMAND>
<DIALCOMMAND>123</DIALCOMMAND>
<DEACTIVATIONCOMMAND>0</DEACTIVATIONCOMMAND>
<MODE>Dial</MODE>
<DETAIL>Here you go.</DETAIL>
<IMAGE>2014-16-9--16-28-25</IMAGE>
<LONGDESC><![CDATA[<p>P<br />P<br />P </p>]]></LONGDESC>
<Mechanism>
<Title>Mech Title</Title>
<Description>Here you go.</Description>
<Trigger>Mech Trigger</Trigger>
<Controls>1</Controls>
</Mechanism>
</Service>
The c# code is given below where i am creating the document
XElement ServiceList =
new XElement("ServiceList",
new XElement("Service",
new XElement("COMPAT", "2"),
new XElement("EQUIPID", equipId),
new XElement("TITLE", form["Title"]),
new XElement("SMSCOMMAND", smscommand),
new XElement("DIALCOMMAND",dialcommand),
new XElement("DEACTIVATIONCOMMAND", smsdecactivationcommand),
new XElement("MODE", mode),
new XElement("DETAIL", form["Detail"]),
new XElement("IMAGE", Datetime),
new XElement("LONGDESC", new XCData(htmlstring)),
new XElement("Mechanism",
new XElement("Title", form["Mechanism.Title"]),
new XElement("Description", form["Mechanism.Description"]),
new XElement("Trigger", form["Mechanism.Triger"]),
new XElement("Controls", form["Mechanism.Controls"])
)
));
XDocument xml = new XDocument(ServiceList);
I simply convert the above document to string with the help of the following method and insert it to database as string.
public string GetXMLAsString(XDocument myxml)
{
StringWriter sw = new StringWriter();
XmlTextWriter tx = new XmlTextWriter(sw);
myxml.WriteTo(tx);
string str = sw.ToString();
return str;
}

Assuming that you're able to get the XML string back from database and store it in a string variable xml, then you can load it to XDocument as follow :
string xml;
.....
XDocument doc = XDocument.Parse(xml);
And assuming that you can construct the new <Service> node as an XElement object referenced by variable newService, you can easily append it to the doc using XElement.Add() method :
XElement newService;
.....
doc.Root.Add(newService);
Then you need to replace the XML in your database with updated XML :
string updatedXml = doc.ToString();
//save updatedXml to your database
You can easily get XML content by calling ToString() on the XDocument object, as shown in above example.

How to add comment to end of XmlDocument in C# when returned from ASMX Webservice

I have the following class;
[XmlRoot("Customer")]
public class MyClass
{
[XmlElement("CustId")]
public int Id {get;set;}
[XmlElement("CustName")]
public string Name {get;set;}
}
I then use the following function serialise the class object to Xml
public static XmlDocument SerializeObjectToXML(object obj, string sElementName)
{
XmlSerializer serializer =
new XmlSerializer(obj.GetType(), new XmlRootAttribute("Response"));
using (MemoryStream ms = new MemoryStream())
{
XmlDocument xmlDoc = new XmlDocument();
serializer.Serialize(ms, obj);
ms.Position = 0;
xmlDoc.Load(ms);
}
}
My current output to XML is like;
<Response>
<CustId></CustId>
<CustName></CustName>
</Response>
However I'd like to add a comment like
<Response>
<CustId></CustId>
<CustName></CustName>
</Response>
<!-- Sample Comment Here -->
How can I achieve this ? I tried the following;
XmlComment xmlComment;
xmlComment = xmlDoc.CreateComment("Sample XML document");
XmlElement root = xmlDoc.DocumentElement;
xmlDoc.InsertAfter(xmlComment, root);
But, when I try to read the Xml using this kind of WebClient call
oClient.UploadString("http://www.myurl.com/", "POST", "");
I can see the Xml elements, but not the comment.
UPDATE
I checked, and even if I call the webservice (ASMX) directly via a browser, the comment tag is NOT returned when using the browser developer Tools.
It would appear that the ASMX webservice is not returning the comment tag...?

How to include Declaration with XElement.ToString()

I am trying to write an XML response for my web service however I can't figure out how to make the declaration appear in the response.
My code is like so :
StringBuilder sBuilder = new StringBuilder();
using (XmlWriter writer = XmlWriter.Create(sBuilder))
{
writer.WriteStartDocument();
writer.WriteStartElement("ReportResponse");
Response.WriteXml(writer);
writer.WriteEndElement();
writer.WriteEndDocument();
}
var response = XElement.Parse(sBuilder.ToString());
return response;
Response is just a POCO for storing response data.
I am aware that the Save method includes the declaration and the ToString() method does not. I need to write my declaration back with ToString().
I really just want to return custom XML from my REST Service without casting my string 100 times to return valid XML. Is this even possible or am just spinning my wheels ?

If you want to include xml declaration, you can do it this way:
XDocument xdoc = XDocument.Parse(xmlString);
StringBuilder builder = new StringBuilder();
using (TextWriter writer = new StringWriter(builder))
{
xdoc.Save(writer);
}
Console.WriteLine(builder);
Update:
I've noticed, that StringWriter spoils encoding. So one more option is to do so:
string docWithDeclaration = xdoc.Declaration + xdoc.ToString();

Make xml more readable

Is there any way to take an xml string in .net and make it easyer to read?
what i mean is can i convert this:
<element1><element2>some data</element2></element1>
to this:
<element1>
<element2>
some data
</element2>
</element1>
is there any built in class for this? as sql server 2005 seems to remove all formatting on xml to save space or some thing...

If you're using .NET 3.5, you can load it as an XDocument and then just call ToString() which will indent it appropriately. For example:
using System;
using System.Xml.Linq;
public class Test
{
static void Main()
{
string xml = "<element1><element2>some data</element2></element1>";
XDocument doc = XDocument.Parse(xml);
xml = doc.ToString();
Console.WriteLine(xml);
}
}
Result:
<element1>
<element2>some data</element2>
</element1>
If you're writing it to a file or other stream, then XDocument.Save will (by default) indent it too.
(I believe XElement has all the same features, if you don't really need an XDocument.)

How do you save / write the XML back to a file ?
You can create an XmlWriter and pass it an XmlWriterSettings instance, where you set the Indent property to true:
XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
XmlWriter writer = XmlWriter.Create (outputStream, settings);

You can load the string into an XDocument object and save it to a string again:
XDocument doc = XDocument.Load(new StringReader(xmlString));
StringWriter writer = new StringWriter();
doc.Save(writer);
string readable = writer.ToString();
That will give you the xml formatted this way:
<?xml version="1.0" encoding="utf-16"?>
<element1>
<element2>some data</element2>
</element1>

Have a look at
XmlWriterSettings
http://msdn.microsoft.com/en-us/library/system.xml.xmlwritersettings.aspx
you can define Indent and IndentChars

First of all, you have tagged C# and VB.NET both. So my answer will be for both of them.
You can define function which get XML string as a parameter in type of String.
Let's say;
You created a function as :
[VB]
Private Function PrettyXML(XMLString As String) As String
Dim sw As New StringWriter()
Dim xw As New XMLWriter(sw)
xw.Formatiing = Formatting.Indented
xw.Indentation = 4
Dim doc As New XMLDocument
doc.LoadXML(XMLString)
doc.Save(xw)
Return sw.ToString()
End Function
Then you can simpyl call this function as:
Dim myXML As String = "<element1><element2>some data</element2></element1>"
Dim myPrettyXML As String
myPrettyXML = PrettyXML(myPrettyXML)
[C#]
Private String PrettyXML(string XMLString)
{
StringWriter sw = new StringWriter();
XMLTextWriter xw = new XmlTextWriter(sw);
xw.Formatiing = Formatting.Indented;
xw.Indentation = 4;
XmlDocument doc = new XmlDocument();
doc.Save(xm);
return sw.ToString();
}
Then you can simply call this function as:
string myXML = "<element1><element2>some data</element2></element1>";
string myPrettyXML = "";
myPrettyXML = PrettyXML(myPrettyXML);
NOTE: I have not tried C# version, but it should work.
Hope this helps..