如何将xml作为UTF-8而不是UTF-16返回

我正在使用序列化的例程。 它有效，但下载到浏览器后，我看到一个空白页面。 我可以在文本编辑器中查看页面源或打开下载，我看到xml，但它是UTF-16，我认为这是为什么浏览器页面显示空白？

如何修改序列化程序例程以返回UTF-8而不是UTF-16？

XML源返回：

   January February March April May June July August September October November December   

调用序列化程序的示例：

 DateTimeFormatInfo dateTimeFormatInfo = new DateTimeFormatInfo(); var months = dateTimeFormatInfo.MonthNames.ToList(); string SelectionId = "1234567890"; return new XmlResult<List>(SelectionId) { Data = months }; 

串行器：

 public class XmlResult : ActionResult { private string filename = DateTime.Now.ToString("ddmmyyyyhhss"); public T Data { private get; set; } public XmlResult(string selectionId = "") { if (selectionId != "") { filename = selectionId; } } public override void ExecuteResult(ControllerContext context) { HttpContextBase httpContextBase = context.HttpContext; httpContextBase.Response.Buffer = true; httpContextBase.Response.Clear(); httpContextBase.Response.AddHeader("content-disposition", "attachment; filename=" + filename + ".xml"); httpContextBase.Response.ContentType = "text/xml"; using (StringWriter writer = new StringWriter()) { XmlSerializer xml = new XmlSerializer(typeof(T)); xml.Serialize(writer, Data); httpContextBase.Response.Write(writer); } } } 

Answer 1

响应的编码

我对框架的这一部分不是很熟悉。 但根据MSDN，您可以设置HttpResponse的内容编码，如下所示：

 httpContextBase.Response.ContentEncoding = Encoding.UTF8; 

XmlSerializer看到的编码

在再次阅读你的问题后，我发现这是一个艰难的部分。 问题在于StringWriter的使用。 因为.NET字符串总是存储为UTF-16（引用需要^^），所以StringWriter将其作为其编码返回。 因此， XmlSerializer将XML声明写为

要解决这个问题，您可以像这样写入MemoryStream：

 using (MemoryStream stream = new MemoryStream()) using (StreamWriter writer = new StreamWriter(stream, Encoding.UTF8)) { XmlSerializer xml = new XmlSerializer(typeof(T)); xml.Serialize(writer, Data); // I am not 100% sure if this can be optimized httpContextBase.Response.BinaryWrite(stream.ToArray()); } 

其他方法

另一个编辑：我刚刚注意到这个由jtm001链接的答案。 简化了解决方案，为XmlSerializer提供了一个自定义的XmlWriter ，它被配置为使用UTF8作为编码。

Athari 建议从StringWriter派生并将编码通告为UTF8。

据我所知，两种解决方案都应该有效。 我认为这里的外卖是你需要一种样板代码或其他代码……

Answer 2

您可以使用强制UTF8的StringWriter。 这是一种方法：

 public class Utf8StringWriter : StringWriter { // Use UTF8 encoding but write no BOM to the wire public override Encoding Encoding { get { return new UTF8Encoding(false); } // in real code I'll cache this encoding. } } 

然后在代码中使用Utf8StringWriter编写器。

 using (StringWriter writer = new Utf8StringWriter()) { XmlSerializer xml = new XmlSerializer(typeof(T)); xml.Serialize(writer, Data); httpContextBase.Response.Write(writer); } 

答案的灵感来自将对象序列化为.NET中的UTF-8 XML

Answer 3

要序列化为UTF8字符串：

  private string Serialize(MyData data) { XmlSerializer ser = new XmlSerializer(typeof(MyData)); // Using a MemoryStream to store the serialized string as a byte array, // which is "encoding-agnostic" using (MemoryStream ms = new MemoryStream()) // Few options here, but remember to use a signature that allows you to // specify the encoding using (XmlTextWriter tw = new XmlTextWriter(ms, Encoding.UTF8)) { tw.Formatting = Formatting.Indented; ser.Serialize(tw, data); // Now we get the serialized data as a string in the desired encoding return Encoding.UTF8.GetString(ms.ToArray()); } } 

要在Web响应中将其作为XML返回，请不要忘记设置响应编码：

  string xml = Serialize(data); Response.ContentType = "application/xml"; Response.ContentEncoding = System.Text.Encoding.UTF8; Response.Output.Write(xml);