C# 将xml文档转换为编码为utf-8的字符串

我想创建一个xml文档并将其保存在string对象中

为了保存和编码的目的，我将这两个问题都提到这里

我的代码：

StringBuilder builder = new StringBuilder();

XDocument doc = new XDocument(new XElement("BANKID",
       new XElement("ReqID", "WEB"),
       new XElement("ReqHeader", "CASHDEP"),
       new XElement("CurrencyCode", ""),
       new XElement("CurrencyAbbrivation", "")));

using (TextWriter writer = new Utf8StringWriter(builder)) // Error Line
{
doc.Save(writer);
}
builder.ToString();

public class Utf8StringWriter : StringWriter
{
    public override Encoding Encoding { get { return Encoding.UTF8; } }        
}

“Utf8StringWriter不包含接受1个参数的构造函数”时出错

---

如何修改将接受参数作为

StringBuilder

的类？

您的自定义

Utf8StringWriter

类没有接受参数的构造函数，但您正在尝试向其传递值。这就是为什么您会收到错误消息

添加接受

StringBuilder

的公共构造函数，然后将其传递给基类：

public class Utf8StringWriter : StringWriter
{
    public Utf8StringWriter(StringBuilder stringBuilder)
        :base(stringBuilder)
    {
    }

    public override Encoding Encoding { get { return Encoding.UTF8; } }
}

类似于：？