的XmlWriter編碼UTF-8在C＃中使用的StringWriter

我使用C＃輸出XML文件，我試着去設置的XML編碼值UTF-8，但其目前輸出：的XmlWriter編碼UTF-8在C＃中使用的StringWriter

<?xml version="1.0"?>

這是我的代碼：

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

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

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

private string GetXml(JobStore jobStore) { 
    StringWriterWithEncoding sw = new StringWriterWithEncoding(); 
    XmlWriterSettings settings = new XmlWriterSettings(); 
    settings.Encoding = Encoding.UTF8; 
    settings.Encoding = Encoding.GetEncoding("utf-8"); 
    settings.Indent = true; 
    using(var writer = XmlWriter.Create(sw, settings)) { 
     writer.WriteStartDocument(); 
     writer.WriteStartElement("resources"); 

     writer.WriteStartElement("string"); 
     writer.WriteAttributeString("name"); 
     writer.WriteCData("value"); 
     writer.WriteEndElement(); 

     writer.WriteEndElement(); 
     writer.WriteEndDocument(); 
    } 
    return sw.ToString(); 
}

必須是簡單的東西我失蹤了？

來源

2017-03-03 Web Tech

你能在.NETFiddle分享您的代碼？ – aloisdg

來自[此回答]（Utf8StringWriter）（https://stackoverflow.com/questions/955611/xmlwriter-to-write-to-a-string-instead-of-to-a-file/955698#955698）應該工作。 – dbc

你的代碼不能編譯 - 'StringWriterWithEncoding'沒有無參數的構造函數。或者，也許你的版本實際上有一個無參數的構造函數，它將'encoding'保留在其默認值（空值），這意味着'Encoding'返回null？這將解釋你的問題。無論如何，如果我做'StringWriterWithEncoding sw = new StringWriterWithEncoding（Encoding.UTF8）;'一切工作正常。示例[fiddle]（https://dotnetfiddle.net/JxACgB）。 – dbc

您的代碼不編譯 - StringWriterWithEncoding沒有參數的構造函數。或者，如果它有一個無參數的構造函數，也許它看起來像這樣？

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

    public StringWriterWithEncoding() { } 

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

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

如果是這樣，這可以解釋你的問題 - 現場encoding一直留在其默認值（NULL）值，意味着Encoding返回null，因此沒有編碼會出現在XML文件英寸

爲了解決這個問題，消除了參數的構造函數，然後執行：

var sw = new StringWriterWithEncoding(Encoding.UTF8);

或更改明確設置Encoding.UTF8參數的構造函數：

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

    public StringWriterWithEncoding() : this(Encoding.UTF8) { } 

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

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

來源

2017-03-03 16:50:36 dbc

只需使用輸出文件名稱爲XmlWriter的，而不是StringWriterWithEncoding：

var settings = new XmlWriterSettings 
{ 
    Encoding = Encoding.UTF8, 
    Indent = true 
}; 

using (var writer = XmlWriter.Create(filePathName, settings)) 
{ 
    ...

來源

2017-03-03 16:31:56 Interferank

的XmlWriter編碼UTF-8在C＃中使用的StringWriter

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