XmlSerializer的几个用法

 1. 去掉 attribute 里面的 xmlns:xsi 和 xmlns:xsd

1.             XmlSerializer xmlSerializer = new XmlSerializer(typeof(Class1));
2.             Class1 class1 = new Class1();
3.             class1.Property = "My property";
4.             StringBuilder stringBuilder = new StringBuilder();
5.             XmlSerializerNamespaces xmlSerializerNamespaces=new XmlSerializerNamespaces();
6.             xmlSerializerNamespaces.Add("","");
7.             using (XmlWriter xmlWriter = XmlWriter.Create(stringBuilder))
8.             {
9.                 //xmlSerializer.Serialize(xmlWriter, class1);
10.                 xmlSerializer.Serialize(xmlWriter, class1, xmlSerializerNamespaces);
11.                 System.Diagnostics.Debug.WriteLine(stringBuilder.ToString());
12.             }
    

output：
 <?xml version="1.0" encoding="utf-16"?><Class1 property="My property" />

如果运行第9行，output则是：
<?xml version="1.0" encoding="utf-16"?><Class1 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" property="My property" />

   
关键在与：在Serialize对象时，传入一个XmlSerializerNamespaces，这样XmlSerializer就会用你传入的XmlSerializerNamespaces而不会用default的XmlSerializerNamespaces。

2. 删除XmlDeclaration：<?xml version="1.0" encoding="utf-16"?>
其实很简单，只有在创建XmlWriter的时候传入一个XmlWriterSettings就可以了，具体见代码第8-10行：

1.             XmlSerializer xmlSerializer = new XmlSerializer(typeof(Class1));
2.             Class1 class1 = new Class1();
3.             class1.Property = "My property";
4.             StringBuilder stringBuilder = new StringBuilder();
5.             XmlSerializerNamespaces xmlSerializerNamespaces=new XmlSerializerNamespaces();
6.             xmlSerializerNamespaces.Add("","");
7. 
   
8.             XmlWriterSettings xmlWriterSettings = new XmlWriterSettings();
9.             xmlWriterSettings.OmitXmlDeclaration = true;
10.             using (XmlWriter xmlWriter = XmlWriter.Create(stringBuilder, xmlWriterSettings))
11.             {                
12.                 xmlSerializer.Serialize(xmlWriter, class1, xmlSerializerNamespaces);
13.                 System.Diagnostics.Debug.WriteLine(stringBuilder.ToString());
14.             }

output：
<Class1 property="My property" />