更改StringWriter xml节点输出

Question

我正在使用.NET Core3.1

有任何方法编辑StringWriter输出的xml节点吗？

例如，我想换一下"utf-8“的大小写。当前的输出如下所示。

<?xml version="1.0" encoding="utf-8"?>

我的代码如下。

public class MyStringWriter: StringWriter
{
    public override Encoding Encoding => Encoding.UTF8;
}

我编写xml的函数

using (TextWriter tw= new MyStringWriter())
{
    using (var xw = XmlWriter.Create(tw))
    {
        xmlDoc.WriteTo(xw);
    }
    var output = tw.ToString();
}

Answer 1

您可以手动编写Xml声明：

using (TextWriter tw= new MyStringWriter())
{
    using (var xw = XmlWriter.Create(tw))
    {
        xw.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");
        xmlDoc.WriteTo(xw);
    }
    var output = tw.ToString();
}