我继承了一个c#类。我已经成功地“构建”了对象。但是我需要将对象序列化为XML。有什么简单的方法吗?
看起来类已经为序列化设置了，但我不确定如何获得XML表示。我的类定义是这样的:
[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.0.30319.1")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.domain.com/test")]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "http://www.domain.com/test", IsNullable = false)]
public partial class MyObject
{
...
}
以下是我认为我能做的，但它不起作用:
MyObject o = new MyObject();
// Set o properties
string xml = o.ToString();
如何获得该对象的XML表示形式?
必须使用XmlSerializer进行XML序列化。下面是一个示例代码片段。
XmlSerializer xsSubmit = new XmlSerializer(typeof(MyObject));
var subReq = new MyObject();
var xml = "";
using(var sww = new StringWriter())
{
using(XmlWriter writer = XmlWriter.Create(sww))
{
xsSubmit.Serialize(writer, subReq);
xml = sww.ToString(); // Your XML
}
}
根据泛型类的@kiquenet请求:
public class MySerializer<T> where T : class
{
public static string Serialize(T obj)
{
XmlSerializer xsSubmit = new XmlSerializer(typeof(T));
using (var sww = new StringWriter())
{
using (XmlTextWriter writer = new XmlTextWriter(sww) { Formatting = Formatting.Indented })
{
xsSubmit.Serialize(writer, obj);
return sww.ToString();
}
}
}
}
用法:
string xmlMessage = MySerializer<MyClass>.Serialize(myObj);
我将从本·格里普卡的回答开始:
public void Save(string FileName)
{
using (var writer = new System.IO.StreamWriter(FileName))
{
var serializer = new XmlSerializer(this.GetType());
serializer.Serialize(writer, this);
writer.Flush();
}
}
I used this code earlier. But reality showed that this solution is a bit problematic. Usually most of programmers just serialize setting on save and deserialize settings on load. This is an optimistic scenario. Once the serialization failed, because of some reason, the file is partly written, XML file is not complete and it is invalid. In consequence XML deserialization does not work and your application may crash on start. If the file is not huge, I suggest first serialize object to MemoryStream then write the stream to the File. This case is especially important if there is some complicated custom serialization. You can never test all cases.
public void Save(string fileName)
{
//first serialize the object to memory stream,
//in case of exception, the original file is not corrupted
using (MemoryStream ms = new MemoryStream())
{
var writer = new System.IO.StreamWriter(ms);
var serializer = new XmlSerializer(this.GetType());
serializer.Serialize(writer, this);
writer.Flush();
//if the serialization succeed, rewrite the file.
File.WriteAllBytes(fileName, ms.ToArray());
}
}
现实场景中的反序列化应该与损坏的序列化文件算在一起，它有时会发生。负载函数由Ben Gripka提供。
public static [ObjectType] Load(string fileName)
{
using (var stream = System.IO.File.OpenRead(fileName))
{
var serializer = new XmlSerializer(typeof([ObjectType]));
return serializer.Deserialize(stream) as [ObjectType];
}
}
它可能会被一些复苏场景所包裹。它适用于设置文件或其他文件，可以删除的情况下出现问题。
public static [ObjectType] LoadWithRecovery(string fileName)
{
try
{
return Load(fileName);
}
catch(Excetion)
{
File.Delete(fileName); //delete corrupted settings file
return GetFactorySettings();
}
}
必须使用XmlSerializer进行XML序列化。下面是一个示例代码片段。
XmlSerializer xsSubmit = new XmlSerializer(typeof(MyObject));
var subReq = new MyObject();
var xml = "";
using(var sww = new StringWriter())
{
using(XmlWriter writer = XmlWriter.Create(sww))
{
xsSubmit.Serialize(writer, subReq);
xml = sww.ToString(); // Your XML
}
}
根据泛型类的@kiquenet请求:
public class MySerializer<T> where T : class
{
public static string Serialize(T obj)
{
XmlSerializer xsSubmit = new XmlSerializer(typeof(T));
using (var sww = new StringWriter())
{
using (XmlTextWriter writer = new XmlTextWriter(sww) { Formatting = Formatting.Indented })
{
xsSubmit.Serialize(writer, obj);
return sww.ToString();
}
}
}
}
用法:
string xmlMessage = MySerializer<MyClass>.Serialize(myObj);
