asked on

Save to XML

I have this piece of code.

public static void SaveXML()
{
XmlDocument xmlDoc;
XmlNode decNode;
XmlElement rootElement;
XmlElement level2Element;

xmlDoc = new XmlDocument();

// Create and add the XML declaration
decNode = xmlDoc.CreateNode(XmlNodeType.XmlDeclaration, null, null);
xmlDoc.AppendChild(decNode);

// Create and add the root element Document
rootElement = xmlDoc.CreateElement("Mail");
rootElement.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
rootElement.SetAttribute("xsi:noNamespaceSchemaLocation", "mailValidate.xsd");
xmlDoc.AppendChild(rootElement);

// Create a new To element and add it to the Root element
level2Element = xmlDoc.CreateElement("To");
level2Element.InnerText = "to@email.com";
rootElement.AppendChild(level2Element);

// Create a new Cc element and add it to the Root element
level2Element = xmlDoc.CreateElement("Cc");
level2Element.InnerText = "cc@email.com";
rootElement.AppendChild(level2Element);

// Create a new Bcc element and add it to the Root element
level2Element = xmlDoc.CreateElement("Bcc");
level2Element.InnerText = "bcc@email.com";
rootElement.AppendChild(level2Element);

// Create a new From element and add it to the Root element
level2Element = xmlDoc.CreateElement("From");
level2Element.InnerText = "from@email.com";
rootElement.AppendChild(level2Element);

// Create a new Subject element and add it to the Root element
level2Element = xmlDoc.CreateElement("Subject");
level2Element.InnerText = "Subject";
rootElement.AppendChild(level2Element);

//Save the XML document
xmlDoc.Save(@"c:\namevalue.xml");
}

However, the code is giving me below XML file

<Mail xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" noNamespaceSchemaLocation="mailValidate.xsd">
....

I need to have it as
However, the code is giving me below XML file

<Mail xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="mailValidate.xsd">
....

Bob Learned

Here is a little fragment of an example, using the XmlTextWriter and XmlWriterSettings to control the output of the XML document:

XmlWriterSettings settings = new XmlWriterSettings();
settings.NewLineHandling = NewLineHandling.None;
settings.OmitXmlDeclaration = false;
settings.OutputMethod = XmlOutputMethod.Xml;
settings.CheckCharacters = false;
settings.CloseOutput = true;
settings.ConformanceLevel = ConformanceLevel.Document;
settings.Encoding = new UTF8Encoding();
settings.Indent = true;

XmlTextWriter writer = XmlTextWriter.Create(fileName, settings);
writer.WriteStartDocument();

// <Root>
writer.WriteStartElement("Root");

// </Root>
writer.WriteEndElement();

writer.WriteEndDocument();

writer.Close();

Bob

cutie2000

ASKER

I need more help.

This is giving me exception.

XmlWriterSettings settings = new XmlWriterSettings();
settings.NewLineHandling = NewLineHandling.None;
settings.OmitXmlDeclaration = false;
settings.CheckCharacters = false;
settings.CloseOutput = true;
settings.ConformanceLevel = ConformanceLevel.Document;
settings.Encoding = new UTF8Encoding();
settings.Indent = true;

XmlWriter writer = XmlTextWriter.Create(fileName, settings);
writer.WriteStartDocument();

// <Root>
writer.WriteStartElement("Mail");
writer.WriteAttributeString("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
writer.WriteAttributeString("xmlns", "http://www.w3.org/2001/XMLSchema-instance");

// </Root>
writer.WriteEndElement();

writer.WriteEndDocument();

writer.Close();

Bob Learned

I didn't write the complete XML code for you, so what is the exception?

Bob

cutie2000

ASKER

Thsi is the exception
System.ArgumentException was unhandled
Message="Invalid name character in 'xmlns:xsi'. The ':' character, hexadecimal value 0x3A, cannot be included in a name."
Source="System.Xml"
StackTrace:
at System.Xml.XmlWellFormedWriter.CheckNCName(String ncname)
at System.Xml.XmlWellFormedWriter.WriteStartAttribute(String prefix, String localName, String namespaceName)
at System.Xml.XmlWriter.WriteAttributeString(String localName, String value)
at TestConsoleApp.Program.SaveXML(String fileName) in C:\Documents and Settings\hongjun\My Documents\Visual Studio 2005\Projects\CSharpPractice\Test\TestConsoleApp\Program.cs:line 75
at TestConsoleApp.Program.Main(String[] args) in C:\Documents and Settings\hongjun\My Documents\Visual Studio 2005\Projects\CSharpPractice\Test\TestConsoleApp\Program.cs:line 17
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

Anyway, this is the result I want.

<?xml version="1.0"?>
<Mail xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="mailValidate.xsd">
<To>to@email.com</To>
<Cc>cc@email.com</Cc>
<Bcc>bcc@email.com</Bcc>
<From>from@email.com</From>
<Subject>Subject</Subject>
<Body>Body</Body>
</Mail>

cutie2000

ASKER

System.ArgumentException was unhandled
Message="Invalid name character in 'xmlns:xsi'.

Bob Learned

The XmlTextWriter class has a lot of power, but it is kind of hidden. The WriteStartElement has 3 overloaded methods. You would need this form:

WriteStartElement(prefix, localName, ns)

Example:
WriteStartElement("xsi", "Mail", "http://www.w3.org/2001/XMLSchema-instance" );

Bob

cutie2000

ASKER

This is my code now.
I am unable to get the 2nd attribute written on the Root.
This is the one xsi:noNamespaceSchemaLocation="mailValidate.xsd">

XmlWriterSettings settings = new XmlWriterSettings();
settings.NewLineHandling = NewLineHandling.None;
settings.OmitXmlDeclaration = false;
settings.CheckCharacters = false;
settings.CloseOutput = true;
settings.ConformanceLevel = ConformanceLevel.Document;
settings.Encoding = new UTF8Encoding();
settings.Indent = true;

XmlWriter writer = XmlTextWriter.Create(fileName, settings);
writer.WriteStartDocument();

// <Mail>
//<Mail xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="mailValidate.xsd">
writer.WriteStartElement("xsi", "Mail", "http://www.w3.org/2001/XMLSchema-instance");
//writer.WriteAttributeString("xsi", "Mail", "noNamespaceSchemaLocation", "mailValidate.xsd");

writer.WriteElementString("To", "to@email.com");
writer.WriteElementString("Cc", "cc@email.com");
writer.WriteElementString("Bcc", "bcc@email.com");
writer.WriteElementString("From", "from@email.com");
writer.WriteElementString("Subject", "Subject");
writer.WriteElementString("Body", "This is body");

// </To>
writer.WriteEndElement();
writer.WriteEndDocument();

writer.Close();

Bob Learned

Try this:

writer.WriteAttributeString("noNamespaceSchemaLocation", "http://www.w3.org/2001/XMLSchema-instance", "mailValidate.xsd");

Bob

cutie2000

ASKER

bob, thanks a lot

however, i realized something

<xsi:Mail xsi:noNamespaceSchemaLocation="mailValidate.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

seems to be different from

<Mail xsi:noNamespaceSchemaLocation="mailValidate.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

Notice the extra xsi: generated by the .NET code. If I remove one of the TAG from my generated XML file, VS 2005 does not flag a validation error if I have xsi: in front. If I don't have, VS 2005 correctly flag an error. So I am wondering is it possible to generate without the xsi in front?

ASKER CERTIFIED SOLUTION

Bob Learned

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