从Base64编码在C＃中的解码

问题描述：

我创建XML文档，并保存这个文件为

I created XML Document and saved this document as

  XmlDocument xmlDoc = new XmlDocument();
  XmlDeclaration dec = xmlDoc.CreateXmlDeclaration("1.0", "UTF-8", null);
  xmlDoc.AppendChild(dec);
  XmlTextWriter writer = new XmlTextWriter(fullPath,Encoding.UTF8);
  writer.Formatting = Formatting.Indented;
  xMLDoc.Save(writer);
  writer.Flush();

然后，我都设有codeD Base64编码使用恩codeR这个文件

And then I have encoded this document using Base64 Encoder

这De codeR无法解析XML文件。
我创建了德codeR自己，得到这个结果。

The Decoder could not parse XML file. I created the decoder myself and got this result

 ?<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<ClinicalDocument 
 xmlns=\"urn:hl7-org:v3\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"
classCode=\"DOCCLIN\" moodCode=\"EVN\" schemaLocation=\"urn:hl7-org:v3
CDA.xsd\">\r\n  <typeId extension=\"POCD_HD000040\" root=\"2.16.840.1.113883.1.3
\" />\r\n

请帮我解决这个问题。
我怎么也得保存XML文件，以避免这些问题？
或者，我怎么也得带code至64基地来解决问题？
我使用Base64 EN codeR为en code xml文件。
我请求文件。它是需要使用的base64 EN $ C $铬。
我去codeD自己来检查哪里出了问题。
去codeR就是Java。他们不能解析xml文件，我相信，因为＆LT？;在该文件的前面

Please help me to resolve the issue. How I have to save the XML file to avoid the issues? Or How I have to encode to Base 64 to resolve the issue? I am using base64 encoder to encode xml file. I am requesting document. it is required to use base64 encoder. I decoded myself to check where is the problem. The decoder is Java . They can not parse the xml file I believe because ?< in front of the document.

答

这取决于你是如何编码，但你应该使用UTF-8，因为该文件被宣布为。下面是用于编码和解码的例子：

It depends on how you're encoding it, but you should use UTF-8 since the document is declared as such. Here are examples for encoding and decoding:

请参阅乔恩斯基特的答案在这里：

C# base64编码/使用对象问题的系列化解码

See Jon Skeet's answer here:
C# base64 encoding/decoding with serialization of objects issue

要带code：

public string EncodeStringToBase64(string stringToEncode)
{
    return Convert.ToBase64String(Encoding.UTF8.GetBytes(stringToEncode));
}

要取消code：

public string DecodeStringFromBase64(string stringToDecode)
{       
    return Encoding.UTF8.GetString(Convert.FromBase64String(stringToDecode));
}

从Base64编码在C＃中的解码

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