XML encoding issue

This is a discussion on XML encoding issue within the C# Programming forums, part of the General Programming Boards category; Hello everyone, Here is my code, and it will always output UTF-16 at XML header even if I set the ...

  1. #1
    Registered User
    Join Date
    May 2006
    Posts
    1,579

    XML encoding issue

    Hello everyone,


    Here is my code, and it will always output UTF-16 at XML header even if I set the XML declaration to UTF-8.

    Here is my code and output.

    My questions,

    1. How to make UTF-8 in header other than UTF-16?
    2. Is the XML string really UTF-16 encoded or UTF-8 encoded? I think in C#, string is always UTF-16 encoded, why do we need a UTF-8 in header?

    Code:
    <?xml version="1.0" encoding="utf-16"?>
    <CategoryList a="12345" b="1d5458cd-a070-40cc-a3f4-cf3c394013cc" c="true" />
    
    using System;
    using System.Text;
    using System.IO;
    using System.Xml;
    
    class Test
    {
        public static void Main()
        {
            XmlDocument xmlDoc = new XmlDocument();
    
    
            // Write down the XML declaration
            XmlDeclaration xmlDeclaration = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null);
    
            // Create the root element
            XmlElement rootNode = xmlDoc.CreateElement("CategoryList");
            xmlDoc.InsertBefore(xmlDeclaration, xmlDoc.DocumentElement);
            // Set attribute name and value!
            rootNode.SetAttribute("a", "12345");
            rootNode.SetAttribute("b", Guid.NewGuid().ToString());
            rootNode.SetAttribute("c", "true");
            xmlDoc.AppendChild(rootNode);
    
            // Save to the XML file
            StringWriter stream = new StringWriter();
            xmlDoc.Save(stream);
            string content = stream.ToString();
            Console.Write(content);
    
            return;
        }
    }

    thanks in advance,
    George

  2. #2
    Confused Magos's Avatar
    Join Date
    Sep 2001
    Location
    Sweden
    Posts
    3,145
    I usually let the xml writer handle the encoding itself:
    Code:
    			System.Xml.XmlTextWriter Writer = null;
    
    			try
    			{
    				Writer = new System.Xml.XmlTextWriter(FileName, System.Text.Encoding.UTF8);
    				Writer.Formatting = System.Xml.Formatting.Indented;
    				Writer.WriteStartDocument();
    
    				System.Xml.XmlDocument Document = new System.Xml.XmlDocument();
    				System.Xml.XmlNode RootNode = Document.CreateElement(RootTagName);
    				Document.AppendChild(RootNode);
    
    				SaveXml(Document, RootNode);
    				Document.Save(Writer);
    			}
    			finally
    			{
    				if(Writer != null) Writer.Close();
    			}
    MagosX.com

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