如何以交替顺序对两个不同对象列表的 XML 数组项进行排序?
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【中文标题】如何以交替顺序对两个不同对象列表的 XML 数组项进行排序?【英文标题】:Ho do I ordering XMLArray Items of two different object list in alternate order? 【发布时间】:2021-10-31 16:39:35 【问题描述】:我有类 Type,它有两个不同对象类型的列表。当我尝试序列化类类型时,我按顺序获取列表,但我想以交替顺序获取项目列表。
public class Type
private List<Slow> slowField;
private List<Fast> FastField;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("SLOW", Order=1)]
public List<Slow> SLOW
get
return this.slowField;
set
this.slowField = value;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("FAST", Order=2)]
public List<Fast> FAST
get
return this.FastField;
set
this.FastField = value;
电流输出:
<Type>
<SLOW>S1</SLOW>
<SLOW>S2</SLOW>
<SLOW>S3</SLOW>
<FAST>F1</FAST>
<FAST>F2</FAST>
<FAST>F3</FAST>
</Type>
我需要这个输出:
<Type>
<SLOW>S1</SLOW>
<FAST>F1</FAST>
<SLOW>S2</SLOW>
<FAST>F2</FAST>
<SLOW>S3</SLOW>
<FAST>F3</FAST>
</Type>
【问题讨论】:
【参考方案1】:一种方法是引入第三个 Collection,它将按所需顺序组合两个现有集合。例如,
假设Fast和Slow的结构如下
public class Fast
public int Valueget;set;
public class Slow
public int Valueget;set;
您现在可以为这两种类型引入一个基类(或使用 System.Object 作为公共基础)。例如,
public class Base
public class Fast:Base
public int Valueget;set;
public class Slow:Base
public int Valueget;set;
现在您可以在您的类型类中添加第三个集合,如下所示
[XmlElement("SLOW", Type = typeof(Slow))]
[XmlElement("FAST", Type = typeof(Fast))]
public List<Base> Complete => GetMergedList();
private List<Base> GetMergedList()
int minLen = Math.Min(SLOW.Count, FAST.Count);
var list = SLOW.Take(minLen)
.Zip(FAST.Take(minLen), (a, b) => new Base[] a, b )
.SelectMany(array => array)
.Concat(SLOW.Skip(minLen))
.Concat(FAST.Skip(minLen));
return list.ToList();
请注意,代码假设 Fast 和 Slow 集合已经单独排序,但如果没有,则需要添加对它们进行排序的逻辑。
您还需要用XmlIgnoreAttribute
标记现有属性以在序列化期间跳过它们。
[XmlIgnore]
public List<Slow> SLOW
....
[XmlIgnore]
public List<Fast> SLOW
....
现在您可以序列化 Type 实例以获得所需的结果。
Demo Code
【讨论】:
【参考方案2】:只需交替输出,如果迭代是奇数,则打印第一个列表,如果偶数打印第二个。做这样的事情:
for( int i = 1; i < ListLength; i++)
if( i%2 == 0)
// put here your second list dont forget to put i-1 since we started with 1 in for
print(" The value is even");
else
//put here your first list
print("the value is odd");
【讨论】:
但是我是直接序列化Type类。 XMLSerializer 正在打印数据【参考方案3】:这是一个使用 IXmlSerialize 的复杂解决方案。我不知道快速和慢速课程的详细信息。所以我只是对 xml 元素的内部文本进行排序
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Serialization;
using System.Xml.Schema;
using System.Xml.Linq;
using System.IO;
using System.Text.RegularExpressions;
namespace ConsoleApplication2
class Program
const string FILENAME = @"c:\temp\test.xml";
static void Main(string[] args)
Type test = new Type()
FAST = new List<Fast>() new Fast() value = "F1" , new Fast() value = "F2" , new Fast() value = "F3" ,
SLOW = new List<Slow>() new Slow() value = "S1" , new Slow() value = "S2" , new Slow() value = "S3"
;
XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
XmlWriter writer = XmlWriter.Create(FILENAME, settings);
XmlSerializer serializer = new XmlSerializer(typeof(Type));
serializer.Serialize(writer, test);
public class Fast
public string value get; set;
public class Slow
public string value get; set;
public class Type : IXmlSerializable
private List<Slow> slowField;
private List<Fast> FastField;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("SLOW", Order = 1)]
public List<Slow> SLOW
get
return this.slowField;
set
this.slowField = value;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("FAST", Order = 2)]
public List<Fast> FAST
get
return this.FastField;
set
this.FastField = value;
public void WriteXml(XmlWriter writer)
string pattern = @"(?'prefix'.*)(?'suffix'\d+)";
XmlSerializer fastSerializer = new XmlSerializer(typeof(Fast));
XmlSerializer slowSerializer = new XmlSerializer(typeof(Slow));
XmlWriterSettings settings = new XmlWriterSettings();
settings.OmitXmlDeclaration = true;
settings.ConformanceLevel = ConformanceLevel.Fragment;
settings.Indent = true;
MemoryStream ms = new MemoryStream();
XmlWriter childWriter = XmlWriter.Create(ms,settings);
childWriter.WriteRaw("<Root>");
foreach(Slow slow in slowField)
slowSerializer.Serialize(childWriter,slow);
//childWriter.WriteRaw("\n");
foreach (Fast fast in FastField)
fastSerializer.Serialize(childWriter, fast);
//childWriter.WriteRaw("\n");
childWriter.WriteRaw("</Root>");
childWriter.Flush();
ms.Position = 0; ;
string text = Encoding.UTF8.GetString(ms.GetBuffer());
XElement rootElement = XElement.Load(ms);
var orderChildren = rootElement.Elements()
.Select(x => new match = Regex.Match((string)x, pattern), element = x )
.Select(x => new prefix = x.match.Groups["prefix"].Value, suffix = x.match.Groups["suffix"].Value, element = x.element )
.OrderBy(x => x.suffix)
.ThenBy(x => x.prefix)
.ToList();
foreach(var orderChild in orderChildren)
orderChild.element.WriteTo(writer);
public void ReadXml(XmlReader reader)
XmlSerializer fastSerializer = new XmlSerializer(typeof(Fast));
XmlSerializer slowSerializer = new XmlSerializer(typeof(Slow));
while (!reader.EOF)
if (reader.Name == "SLOW")
if (slowField == null) slowField = new List<Slow>();
slowField.Add((Slow)slowSerializer.Deserialize(reader));
if (reader.Name == "FAST")
if (FastField == null) FastField = new List<Fast>();
FastField.Add((Fast)slowSerializer.Deserialize(reader));
public XmlSchema GetSchema()
return (null);
【讨论】:
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