如何把一个编码属性XML以外的UTF-16的XmlWriter？ [英] How to put an encoding attribute to xml other that utf-16 with XmlWriter?

问题描述

我有一个功能，创造了一些XmlDocument的：

I've got a function creating some XmlDocument:

public string CreateOutputXmlString(ICollection<Field> fields)
{
    XmlWriterSettings settings = new XmlWriterSettings();
    settings.Indent = true;
    settings.Encoding = Encoding.GetEncoding("windows-1250");

    StringBuilder builder = new StringBuilder();
    XmlWriter writer = XmlWriter.Create(builder, settings);

    writer.WriteStartDocument();
    writer.WriteStartElement("data");
    foreach (Field field in fields)
    {
        writer.WriteStartElement("item");
        writer.WriteAttributeString("name", field.Id);
        writer.WriteAttributeString("value", field.Value);
        writer.WriteEndElement();
    }
    writer.WriteEndElement();
    writer.Flush();
    writer.Close();

    return builder.ToString();
}

我设置一个编码，但之后，我创建的XmlWriter它确实有UTF-16编码。我知道这是因为字符串（和StringBuilder我想）均设有连接使用UTF-16 codeD，你不能改变它。结果
所以，我怎么能轻松地创建这个XML设置为Windows-1250编码属性？它甚至不必须是EN codeD此编码，它只是必须有指定的属性。

I set an encoding but after i create XmlWriter it does have utf-16 encoding. I know it's because strings (and StringBuilder i suppose) are encoded in utf-16 and you can't change it.
So how can I easily create this xml with the encoding attribute set to "windows-1250"? it doesn't even have to be encoded in this encoding, it just has to have the specified attribute.

编辑：它必须是在.net 2.0，所以任何新的架构元素不能被使用。

edit: it has to be in .Net 2.0 so any new framework elements cannot be used.

推荐答案

您需要使用的StringWriter与相应的编码。不幸的StringWriter不会让你直接指定的编码，所以你需要一个像这样的类：

You need to use a StringWriter with the appropriate encoding. Unfortunately StringWriter doesn't let you specify the encoding directly, so you need a class like this:

public sealed class StringWriterWithEncoding : StringWriter
{
    private readonly Encoding encoding;

    public StringWriterWithEncoding (Encoding encoding)
    {
        this.encoding = encoding;
    }

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

（<一个href=\"http://stackoverflow.com/questions/371930/-net-xmlwriter-unexpected-encoding-is-confusing-me\">This问题是类似的，但并不完全是重复的。）

(This question is similar but not quite a duplicate.)

编辑：要回答的点评：StringWriterWithEncoding传递给 XmlWriter.Create 代替StringBuilder的，然后在年底就可以调用toString（）。

To answer the comment: pass the StringWriterWithEncoding to XmlWriter.Create instead of the StringBuilder, then call ToString() on it at the end.

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