C# 解码及；来自&；amp；从XML到ToString（）

如何获取下面的代码以返回所需的输出。这只是一个简单的csharp，没有ASP.NET

//Desired output: <amp>Before & After</amp>

//instead of

//Current output: <amp>Before &amp; After</amp>

    static void Main(string[] args)
    {
        string amp = "Before & After";
        XmlDocument doc = new XmlDocument();

        StringBuilder sb = new StringBuilder();
        StringWriter stringWriter = new StringWriter(sb);
        XmlTextWriter xmlWriter = new XmlTextWriter(stringWriter);

        xmlWriter.WriteStartElement("amp");
        xmlWriter.WriteString(amp);
        xmlWriter.WriteEndElement();

        global::System.Windows.Forms.MessageBox.Show(sb.ToString());
    }

---

您可以将文本放入CDATA区域-请参阅。

所需的输出不是有效的XML。当前输出与&；之前的

中的CDATA部分相同；After

和

只是两种不同的方式来转义符号and，这样您就可以拥有有效的XML。在任何一种情况下，如果您使用任何XML解析器读取

标记的内容，如果您希望自己创建无效的XML，它将返回

之前和之后的

        string amp = "Before & After";

        // don't really do this, it's very wrong
        StringBuilder sb = new StringBuilder();
        sb.Append("<amp>");
        sb.Append(amp);
        sb.Append("</amp>");

        Console.WriteLine(sb);


下面是我如何解决这个特殊问题的

        string amp = "Before & After";
        XmlDocument doc = new XmlDocument();

        StringBuilder sb = new StringBuilder();
        StringWriter stringWriter = new StringWriter(sb);
        XmlTextWriter xmlWriter = new XmlTextWriter(stringWriter);

        xmlWriter.WriteStartElement("amp");
        xmlWriter.WriteString(amp);
        xmlWriter.WriteEndElement();

        StringReader valueStringReader = new StringReader(sb.ToString());
        XmlTextReader valueXmlReader = new XmlTextReader(valueStringReader);

        valueXmlReader.MoveToContent();

        global::System.Windows.Forms.MessageBox.Show(valueXmlReader.ReadString());

        string amp = "Before & After";
        XmlDocument doc = new XmlDocument();

        StringBuilder sb = new StringBuilder();
        StringWriter stringWriter = new StringWriter(sb);
        XmlTextWriter xmlWriter = new XmlTextWriter(stringWriter);

        xmlWriter.WriteStartElement("amp");
        xmlWriter.WriteString(amp);
        xmlWriter.WriteEndElement();

        StringReader valueStringReader = new StringReader(sb.ToString());
        XmlTextReader valueXmlReader = new XmlTextReader(valueStringReader);

        valueXmlReader.MoveToContent();

        global::System.Windows.Forms.MessageBox.Show(valueXmlReader.ReadString());

我认为所需的输出不是有效的XML，因此我怀疑XmlTextWriter是否会为您这样做。HtmlTextWriter可能……没错，所需的输出不是XML。我希望将其转换回字符串缓冲区中的可读字符。请勿使用
new XmlTextWriter（）
。自.NET 2.0以来，它一直被弃用。改用
XmlWriter.Create（）
。以上只是一个更大问题的再现。我不想创建无效的XML，我只想将XML写入可读的输出中。
        string amp = "Before & After";
        XmlDocument doc = new XmlDocument();

        StringBuilder sb = new StringBuilder();
        StringWriter stringWriter = new StringWriter(sb);
        XmlTextWriter xmlWriter = new XmlTextWriter(stringWriter);

        xmlWriter.WriteStartElement("amp");
        xmlWriter.WriteString(amp);
        xmlWriter.WriteEndElement();

        StringReader valueStringReader = new StringReader(sb.ToString());
        XmlTextReader valueXmlReader = new XmlTextReader(valueStringReader);

        valueXmlReader.MoveToContent();

        global::System.Windows.Forms.MessageBox.Show(valueXmlReader.ReadString());