Mono-XDocument.Load因LoadOptions.PreserveWhitespace而失败

本文关键字：失败 PreserveWhitespace LoadOptions Load Mono-XDocument | 更新日期: 2023-09-27 18:22:47

使用Mono版本2.10.5，以下代码在任何XML文档上都会失败：

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Xml.Linq;
namespace TestXDocument
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            Stream s = File.Open("Settings.xml", FileMode.Open);
            XDocument d = XDocument.Load(s, LoadOptions.PreserveWhitespace);
            s.Close();
            d.Save("Settings.xml");
        }
    }
}

只有当XDocument.Load使用LoadOptions.PreserveWhitespace时才会发生这种情况。关于如何解决这个问题或解决这个问题，有什么想法吗？

在Linux Mint 12和Ubuntu 11.10上测试。

这里有一个例外：

 Unhandled Exception: System.InvalidOperationException: This XmlWriter does not accept Text at this state Prolog.
  at System.Xml.XmlTextWriter.ShiftStateContent (System.String occured, Boolean allowAttribute) [0x00000] in <filename unknown>:0 
  at System.Xml.XmlTextWriter.WriteString (System.String text) [0x00000] in <filename unknown>:0 
  at System.Xml.DefaultXmlWriter.WriteString (System.String text) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XText.WriteTo (System.Xml.XmlWriter w) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XDocument.WriteTo (System.Xml.XmlWriter w) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XDocument.Save (System.Xml.XmlWriter w) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XDocument.Save (System.String filename, SaveOptions options) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XDocument.Save (System.String filename) [0x00000] in <filename unknown>:0 
  at TestXDocument.MainClass.Main (System.String[] args) [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.InvalidOperationException: This XmlWriter does not accept Text at this state Prolog.
  at System.Xml.XmlTextWriter.ShiftStateContent (System.String occured, Boolean allowAttribute) [0x00000] in <filename unknown>:0 
  at System.Xml.XmlTextWriter.WriteString (System.String text) [0x00000] in <filename unknown>:0 
  at System.Xml.DefaultXmlWriter.WriteString (System.String text) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XText.WriteTo (System.Xml.XmlWriter w) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XDocument.WriteTo (System.Xml.XmlWriter w) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XDocument.Save (System.Xml.XmlWriter w) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XDocument.Save (System.String filename, SaveOptions options) [0x00000] in <filename unknown>:0 
  at System.Xml.Linq.XDocument.Save (System.String filename) [0x00000] in <filename unknown>:0 
  at TestXDocument.MainClass.Main (System.String[] args) [0x00000] in <filename unknown>:0

Mono-XDocument.Load因LoadOptions.PreserveWhitespace而失败

我可以在Ubuntu 11.10的两个代码示例中重现相同的问题。正如你所说，Windows平台上没有问题。Mono运行时似乎在XDocument的Save方法中存在某些错误，从而导致意外错误。我想向Mono运行时团队报告这个问题，以获得软件补丁。

然而，我可以在这里提出的可能的解决方案是，

d.Root.Save("Settings1.xml");

XElement中的Save方法似乎没有我们在XDocument中遇到的任何问题。

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