C# 序列化对象的问题
我有一门C语言的课#C# 序列化对象的问题,c#,serialization,xml-serialization,C#,Serialization,Xml Serialization,我有一门C语言的课# public类练习到{ 词典质量保证; 私有字符串、内容、主题; //建设者 //性质 公共void makePersistent(字符串路径){ Stream outputStream=File.OpenWrite(路径+@“\”+this.topic+“.xml”); XmlSerializer serializer=新的XmlSerializer(typeof(ExerciseDTO)); serializer.Serialize(outputStream,this)
public类练习到{
词典质量保证;
私有字符串、内容、主题;
//建设者
//性质
公共void makePersistent(字符串路径){
Stream outputStream=File.OpenWrite(路径+@“\”+this.topic+“.xml”);
XmlSerializer serializer=新的XmlSerializer(typeof(ExerciseDTO));
serializer.Serialize(outputStream,this);
outputStream.Flush();
outputStream.Close();
}
}
调用makePersistent
方法会使应用程序抛出一个带有消息的exeption将exercisedT类型的对象反射到时出错。为什么我不能序列化这个类的实例
[Serializable]
public class ExerciseDTO {
...
}
- 您还应该有一个默认(无参数)构造函数
- 如果要自动序列化属性,还应将其公开
- net不支持字典的序列化,例如,有一些工作循环
编辑:如下所述:应该是“XmlSerializer类不支持字典的序列化”
- 您还应该有一个默认(无参数)构造函数
- 如果要自动序列化属性,还应将其公开
- net不支持字典的序列化,例如,有一些工作循环
编辑:如下所述:应该是“XmlSerializer类不支持字典的序列化”
为什么我不能序列化这个类的实例
[Serializable]
public class ExerciseDTO {
...
}
因为XmlSerializer
类属性
作为替代方案,您可以使用支持字典的
为什么我不能序列化这个类的实例
[Serializable]
public class ExerciseDTO {
...
}
因为XmlSerializer
类属性
作为一种替代方法,您可以使用支持字典的。正如Darin所说,字典不可XML序列化。您可以创建自己的XmlSerializableDictionary。网上有很多很好的例子。这里有一个:
如果链接在将来消亡,则复制/粘贴:
using System;
using System.Collections.Generic;
using System.Text;
using System.Xml.Serialization;
[XmlRoot("dictionary")]
public class SerializableDictionary<TKey, TValue>
: Dictionary<TKey, TValue>, IXmlSerializable
{
#region IXmlSerializable Members
public System.Xml.Schema.XmlSchema GetSchema()
{
return null;
}
public void ReadXml(System.Xml.XmlReader reader)
{
XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));
bool wasEmpty = reader.IsEmptyElement;
reader.Read();
if (wasEmpty)
return;
while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
{
reader.ReadStartElement("item");
reader.ReadStartElement("key");
TKey key = (TKey)keySerializer.Deserialize(reader);
reader.ReadEndElement();
reader.ReadStartElement("value");
TValue value = (TValue)valueSerializer.Deserialize(reader);
reader.ReadEndElement();
this.Add(key, value);
reader.ReadEndElement();
reader.MoveToContent();
}
reader.ReadEndElement();
}
public void WriteXml(System.Xml.XmlWriter writer)
{
XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));
foreach (TKey key in this.Keys)
{
writer.WriteStartElement("item");
writer.WriteStartElement("key");
keySerializer.Serialize(writer, key);
writer.WriteEndElement();
writer.WriteStartElement("value");
TValue value = this[key];
valueSerializer.Serialize(writer, value);
writer.WriteEndElement();
writer.WriteEndElement();
}
}
#endregion
}
使用系统;
使用System.Collections.Generic;
使用系统文本;
使用System.Xml.Serialization;
[XmlRoot(“字典”)]
公共类序列化字典
:字典,IXmlSerializable
{
#区域IXmlSerializable成员
public System.Xml.Schema.XmlSchema GetSchema()
{
返回null;
}
public void ReadXml(System.Xml.XmlReader)
{
XmlSerializer keySerializer=新的XmlSerializer(typeof(TKey));
XmlSerializer valueSerializer=新的XmlSerializer(typeof(TValue));
bool waspempy=reader.isemptyelment;
reader.Read();
如果(为空)
返回;
while(reader.NodeType!=System.Xml.XmlNodeType.EndElement)
{
reader.ReadStartElement(“项目”);
reader.ReadStartElement(“密钥”);
TKey=(TKey)键序列化器。反序列化(读取器);
reader.ReadEndElement();
reader.ReadStartElement(“价值”);
TValue value=(TValue)valueSerializer.反序列化(读取器);
reader.ReadEndElement();
添加(键、值);
reader.ReadEndElement();
reader.MoveToContent();
}
reader.ReadEndElement();
}
public void WriteXml(System.Xml.XmlWriter)
{
XmlSerializer keySerializer=新的XmlSerializer(typeof(TKey));
XmlSerializer valueSerializer=新的XmlSerializer(typeof(TValue));
foreach(此.Keys中的TKey键)
{
编写人。书面启动项(“项目”);
writer.writeStart元素(“键”);
序列化(编写器,键);
writer.writeedelement();
writer.writeStarteElement(“值”);
t值=此[键];
序列化(写入程序,值);
writer.writeedelement();
writer.writeedelement();
}
}
#端区
}
正如Darin所说,字典
是不可XML序列化的。您可以创建自己的XmlSerializableDictionary。网上有很多很好的例子。这里有一个:
如果链接在将来消亡,则复制/粘贴:
using System;
using System.Collections.Generic;
using System.Text;
using System.Xml.Serialization;
[XmlRoot("dictionary")]
public class SerializableDictionary<TKey, TValue>
: Dictionary<TKey, TValue>, IXmlSerializable
{
#region IXmlSerializable Members
public System.Xml.Schema.XmlSchema GetSchema()
{
return null;
}
public void ReadXml(System.Xml.XmlReader reader)
{
XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));
bool wasEmpty = reader.IsEmptyElement;
reader.Read();
if (wasEmpty)
return;
while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
{
reader.ReadStartElement("item");
reader.ReadStartElement("key");
TKey key = (TKey)keySerializer.Deserialize(reader);
reader.ReadEndElement();
reader.ReadStartElement("value");
TValue value = (TValue)valueSerializer.Deserialize(reader);
reader.ReadEndElement();
this.Add(key, value);
reader.ReadEndElement();
reader.MoveToContent();
}
reader.ReadEndElement();
}
public void WriteXml(System.Xml.XmlWriter writer)
{
XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));
foreach (TKey key in this.Keys)
{
writer.WriteStartElement("item");
writer.WriteStartElement("key");
keySerializer.Serialize(writer, key);
writer.WriteEndElement();
writer.WriteStartElement("value");
TValue value = this[key];
valueSerializer.Serialize(writer, value);
writer.WriteEndElement();
writer.WriteEndElement();
}
}
#endregion
}
使用系统;
使用System.Collections.Generic;
使用系统文本;
使用System.Xml.Serialization;
[XmlRoot(“字典”)]
公共类序列化字典
:字典,IXmlSerializable
{
#区域IXmlSerializable成员
public System.Xml.Schema.XmlSchema GetSchema()
{
返回null;
}
public void ReadXml(System.Xml.XmlReader)
{
XmlSerializer keySerializer=新的XmlSerializer(typeof(TKey));
XmlSerializer valueSerializer=新的XmlSerializer(typeof(TValue));
bool waspempy=reader.isemptyelment;
reader.Read();
如果(为空)
返回;
while(reader.NodeType!=System.Xml.XmlNodeType.EndElement)
{
reader.ReadStartElement(“项目”);
reader.ReadStartElement(“密钥”);
TKey=(TKey)键序列化器。反序列化(读取器);
reader.ReadEndElement();
reader.ReadStartElement(“价值”);
TValue value=(TValue)valueSerializer.反序列化(读取器);
reader.ReadEndElement();
添加(键、值);
reader.ReadEndElement();
reader.MoveToContent();
}
reader.ReadEndElement();
}
public void WriteXml(System.Xml.XmlWriter)
{
XmlSerializer keySerializer=新的XmlSerializer(typeof(TKey));
XmlSerializer valueSerializer=新的XmlSerializer(typeof(TValue));
foreach(此.Keys中的TKey键)
{
编写人。书面启动项(“项目”);
writer.writeStart元素(“键”);
keySerializer.Serialize(编写器,k