將xml文檔轉換爲編碼爲utf-8的字符串

Question

我想創建一個xml文檔並將其保存在字符串對象中。

我指的SO這兩個問題，保存和編碼目的

• XDocument.ToString() drops XML Encoding Tag
• Force XDocument to write to String with UTF-8 encoding

我的代碼：

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; } }   
} 

它給了我錯誤說「 Utf8StringWriter不包含需要的構造函數1 arguments「

如何修改那個接受參數爲StringBuilder的類？

Answer 1

您的自定義Utf8StringWriter類沒有構造函數接受參數，但您嘗試將值傳遞給它。這就是爲什麼你會收到錯誤信息。

添加一個接受StringBuilder的公共構造，然後將它傳遞給基類：

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

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