使用XmlSerializer反序列化XML时,保留仅空白元素内容

Question

我有一个类InputConfig,其中包含List<IncludeExcludeRule>:

public class InputConfig
{
    // The rest of the class omitted 
    private List<IncludeExcludeRule> includeExcludeRules;
    public List<IncludeExcludeRule> IncludeExcludeRules
    {
        get { return includeExcludeRules; }
        set { includeExcludeRules = value; }
    }
}

public class IncludeExcludeRule
{
    // Other members omitted
    private int idx;
    private string function;

    public int Idx
    {
        get { return idx; }
        set { idx = value; }
    }

    public string Function
    {
        get { return function; }
        set { function = value; }
    }
}

使用......

FileStream fs = new FileStream(path, FileMode.Create);
XmlSerializer xmlSerializer = new XmlSerializer(typeof(InputConfig));
xmlSerializer.Serialize(fs, this);
fs.Close();

......而且......

StreamReader sr = new StreamReader(path);
XmlSerializer reader = new XmlSerializer(typeof(InputConfig));
InputConfig inputConfig = (InputConfig)reader.Deserialize(sr);

它就像一个冠军!简单的东西,除了我需要function在反序列化时保留成员中的空格.生成的XML文件表明序列化时保留了空格,但在反序列化时丢失了.

<IncludeExcludeRules>
  <IncludeExcludeRule>
    <Idx>17</Idx>
    <Name>LIEN</Name>
    <Operation>E =</Operation>
    <Function>  </Function>
  </IncludeExcludeRule>
</IncludeExcludeRules>

XmlAttributeAttribute的MSDN文档似乎在标题备注下解决了这个问题,但我不明白如何使用它.它提供了这个例子:

// Set this to 'default' or 'preserve'.
[XmlAttribute("space", 
Namespace = "http://www.w3.org/XML/1998/namespace")]
public string Space 

咦？设置"默认"或"保留"的内容？我确定我很接近,但这只是没有意义.我必须认为只有一行XmlAttribute在成员之前插入类中以在反序列化时保留空格.

在这里和其他地方有许多类似问题的实例,但它们似乎都涉及使用XmlReader和XmlDocument,或者涉及单个节点等.我想避免这种深度.

Answer 1

要在XML反序列化期间保留所有空格,只需创建并使用XmlReader:

StreamReader sr = new StreamReader(path);
XmlReader xr = XmlReader.Create(sr);
XmlSerializer reader = new XmlSerializer(typeof(InputConfig));
InputConfig inputConfig = (InputConfig)reader.Deserialize(xr);

与之不同XmlSerializer.Deserialize(XmlReader),XmlSerializer.Deserialize(TextReader)仅保留由xml:space="preserve"属性标记的重要空白.

Answer 2

神秘的文档意味着您需要指定一个附加字段，其[XmlAttribute("space", Namespace = "http://www.w3.org/XML/1998/namespace")]值为default或preserve。XmlAttribute 控制为字段或属性生成的属性的名称。属性的值是字段的值。

例如这个类：

public class Group
{
   [XmlAttribute (Namespace = "http://www.cpandl.com")]
   public string GroupName;

   [XmlAttribute(DataType = "base64Binary")]
   public Byte [] GroupNumber;

   [XmlAttribute(DataType = "date", AttributeName = "CreationDate")]
   public DateTime Today;

   [XmlAttribute("space", Namespace = "http://www.w3.org/XML/1998/namespace")]
   public string Space ="preserve";
}

将被序列化为：

<?xml version="1.0" encoding="utf-16"?>
<Group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
       xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
       d1p1:GroupName=".NET" 
       GroupNumber="ZDI=" 
       CreationDate="2001-01-10" 
       xml:space="preserve" 
       xmlns:d1p1="http://www.cpandl.com" />