我有一个字符串属性,其中包含带换行符的文本。此文本具有HTML文本的一些属性,因为空格被忽略。
如果我使用XML序列化序列化此类型,则新行被正确序列化,但缩进是“错误的”。我希望序列化过程缩进行以保持XML的格式,因为无论如何这些空格字符都会被忽略。
这是一个示例LINQPad程序:
void Main()
{
var d = new Dummy();
d.Text = @"Line 1
Line 2
Line 3";
var serializer = new XmlSerializer(typeof(Dummy));
var ns = new XmlSerializerNamespaces();
ns.Add("", "");
using (var writer = new StringWriter())
{
serializer.Serialize(writer, d, ns);
writer.ToString().Dump();
}
}
[XmlType("dummy")]
public class Dummy
{
[XmlElement("text")]
public string Text
{
get;
set;
}
}
实际输出:
<?xml version="1.0" encoding="utf-16"?>
<dummy>
<text>Line 1
Line 2
Line 3</text>
</dummy>
期望的输出:
<?xml version="1.0" encoding="utf-16"?>
<dummy>
<text>
Line 1
Line 2
Line 3
</text>
</dummy>
这可能吗?如果是这样,怎么样?我宁愿不做只是在我自己添加空白的hackish方式。
原因是这个XML将由人们查看和编辑,所以我希望初始输出能够更好地为他们开箱即用。
答案 0 :(得分:2)
我碰到了同样的问题。最后,我找到了一位自定义作家:
public class IndentTextXmlWriter : XmlTextWriter
{
private int indentLevel;
private bool isInsideAttribute;
public IndentTextXmlWriter(TextWriter textWriter): base(textWriter)
{
}
public bool IndentText { get; set; }
public override void WriteStartAttribute(string prefix, string localName, string ns)
{
isInsideAttribute = true;
base.WriteStartAttribute(prefix, localName, ns);
}
public override void WriteEndAttribute()
{
isInsideAttribute = false;
base.WriteEndAttribute();
}
public override void WriteStartElement(string prefix, string localName, string ns)
{
indentLevel++;
base.WriteStartElement(prefix, localName, ns);
}
public override void WriteEndElement()
{
indentLevel--;
base.WriteEndElement();
}
public override void WriteString(string text)
{
if (String.IsNullOrEmpty(text) || isInsideAttribute || Formatting != Formatting.Indented || !IndentText || XmlSpace == XmlSpace.Preserve)
{
base.WriteString(text);
return;
}
string[] lines = text.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
string indent = new string(IndentChar, indentLevel * Indentation);
foreach (string line in lines)
{
WriteRaw(Environment.NewLine);
WriteRaw(indent);
WriteRaw(line.Trim());
}
WriteRaw(Environment.NewLine);
WriteRaw(new string(IndentChar, (indentLevel - 1) * Indentation));
}
}
你可以像这样使用它:
[TestMethod]
public void WriteIndentedText()
{
var result = new StringBuilder();
using (var writer = new IndentTextXmlWriter(new StringWriter(result)){Formatting = Formatting.Indented, IndentText = true})
{
string text = @" Line 1
Line 2
Line 3 ";
// some root
writer.WriteStartDocument();
writer.WriteStartElement("root");
writer.WriteStartElement("child");
// test auto-indenting
writer.WriteStartElement("elementIndented");
writer.WriteString(text);
writer.WriteEndElement();
// test space preserving
writer.WriteStartElement("elementPreserved");
writer.WriteAttributeString("xml", "space", null, "preserve");
writer.WriteString(text);
writer.WriteEndDocument();
}
Debug.WriteLine(result.ToString());
}
输出:
<?xml version="1.0" encoding="utf-16"?>
<root>
<child>
<elementIndented>
Line 1
Line 2
Line 3
</elementIndented>
<elementPreserved xml:space="preserve"> Line 1
Line 2
Line 3 </elementPreserved>
</child>
</root>