How to change encoding in TextWriter object?

18,598

Solution 1

This seems odd, but it looks like you have to subclass StringWriter if you want to output to a string with utf-8 encoding in the xml.

public class Program
{
    public static void Main(string[] args)
    {
        XDocument xDoc = new XDocument(
            new XDeclaration("1.0", "utf-8", "yes"),
            new XElement("Entity",new XAttribute("Type", "attribute1")));

        StringBuilder builder = new StringBuilder();
        using (TextWriter writer = new EncodingStringWriter(builder, Encoding.UTF8))
        {
            xDoc.Save(writer);
        }

        Console.WriteLine(builder.ToString());
    }
}

public class EncodingStringWriter : StringWriter
{
    private readonly Encoding _encoding;

    public EncodingStringWriter(StringBuilder builder, Encoding encoding) : base(builder)
    {
        _encoding = encoding;
    }

    public override Encoding Encoding
    {
        get { return _encoding;  }                
    }
}

Solution 2

Try

TextWriter ws = new StreamWriter(path, true, Encoding.UTF8);

or

TextWriter ws = new StreamWriter(stream, Encoding.UTF8);
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18,598
user1848942
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user1848942

Updated on June 12, 2022

Comments

  • user1848942
    user1848942 4 months

    I have xml which I send by API in another resurse. I create it by XDocument:

    XDocument xDoc = new XDocument(
        new XDeclaration("1.0", "utf-8", "yes"),
        new XElement("Entity",new XAttribute("Type", "attribute1"),
            new XElement("Fields",...
    

    When I put it in the request it has sent without declaration. So I do next:

    StringBuilder builder = new StringBuilder();
    TextWriter writer = new StringWriter(builder);
    
    using (writer)
    {
        xDoc.Save(writer);
    }
    

    But now TextWriter change encoding in xml to utf-16. I need to change it again on utf-8.

  • BlueChippy
    BlueChippy over 9 years
    or Encoding.GetEncoding(1256) if you need a specific code page (1256 is Arabic)
  • Nyerguds
    Nyerguds over 7 years
    StreamWriter seems like the obvious solution, yes; it is, after all, the specific encoding-customizable implementation of TextWriter, the type expected by XDocument.Save. Even for just going back to String (but getting the XML declaration right) I just use this, on a MemoryStream.