XML encoding issue

George George

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]

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;
}
}
[/Code]

thanks in advance,
George

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

George George18y ago
You load the file twice by invoking xmlDoc.Load(FileName), are there any ways to set encoding in XMLDocument? The constructor of XMLDocument looks like support to set encoding approach, like UTF-8.

Any ideas?

regards,

George
Blocked Account18y ago
Hi George,
U can do that by using this code.

XmlDocument xmlDoc = new XmlDocument();

XmlTextWriter xmlWriter = new XmlTextWriter((FileName), System.Text.Encoding.UTF8);

xmlWriter.Formatting = Formatting.Indented;

xmlWriter.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");

xmlWriter.WriteStartElement("PageTitle");

xmlWriter.Close();

xmlDoc.Load(FileName);

XmlNode Root = xmlDoc.DocumentElement;

XmlElement Page = xmlDoc.CreateElement("Page");

Page.SetAttribute("ID", PageNumber.ToString());

XmlElement Id = xmlDoc.CreateElement("Id");

XmlElement Title = xmlDoc.CreateElement("Title");

XmlElement PageUrl = xmlDoc.CreateElement("PageUrl");

XmlText textId = xmlDoc.CreateTextNode("Hello");

XmlText textTitle = xmlDoc.CreateTextNode("Hello4");

XmlText textPageUrl = xmlDoc.CreateTextNode("Hello4");

textId.Value = PageNumber.ToString();

textTitle.Value = "PageTitle";

textPageUrl.Value = "WWW.c-sharpcorner.com";

Root.AppendChild(Page);

Page.AppendChild(Id);

Page.AppendChild(Title);

Page.AppendChild(PageUrl);

Id.AppendChild(textId);

Title.AppendChild(textTitle);

PageUrl.AppendChild(textPageUrl);

xmlDoc.Save(FileName);

Happy Coding!!