C# 如何从XSD生成类,但保持属性不变?
我正在从数据库接收XML,并试图将其处理到我的系统中。我从另一个团队收到的XSD生成了一个类。我遇到的问题是,现在XSD中的属性名称与我的应用程序中的属性名称不匹配(典型)。这意味着为了构建一个可以使用的对象,我必须创建一个对象,并将其与XML组合在一起。像这样:C# 如何从XSD生成类,但保持属性不变?,c#,xml,serialization,xsd,C#,Xml,Serialization,Xsd,我正在从数据库接收XML,并试图将其处理到我的系统中。我从另一个团队收到的XSD生成了一个类。我遇到的问题是,现在XSD中的属性名称与我的应用程序中的属性名称不匹配(典型)。这意味着为了构建一个可以使用的对象,我必须创建一个对象,并将其与XML组合在一起。像这样: DynamicEntity auth = new DynamicEntity(EntityAuthorization); auth.Properties["DealerId] = authprm.new_dealerid[0].Val
DynamicEntity auth = new DynamicEntity(EntityAuthorization);
auth.Properties["DealerId] = authprm.new_dealerid[0].Value;
auth.Properties["CarId"] = authprm.new_carid[0].Value;
etc...
我可能要设置40到100个属性。我曾考虑将XmlElement应用于类属性,但每次必须(从XML)重新生成类时,我都会丢失先前应用的XmlElement。有什么建议
谢谢大家 您可以使用元数据“buddy class”,方法是将。我将使生成的类成为分部类(如果尚未生成),然后创建另一个分部类并将MetadataType属性添加到该类中。然后,如果您从XSD重新生成类,并且它不是部分的,编译器会抱怨,并且您会记得将它变成部分的
我真的不喜欢“buddy类”,因为属性是重复的,不是很干,但它可能是您正在寻找的解决方案。对于元数据类的简单概述,通常是关于验证属性的,但它适用于任何属性,您可以在MS上找到
您可以看到如何让XmlSerializer了解buddy类的答案
更新
现在我考虑一下,如果不想使用Buddy类,可以构建一个fluent api来配置XML序列化程序
我们将从中保留CustomAttributeProvider类,但创建一个XmlSerializerConfiguration类
public class XmlSerializerConfigurator<T>
{
private readonly XmlAttributeOverrides _xmlAttributeOverrides;
public XmlSerializerConfigurator(XmlAttributeOverrides xmlAttributeOverrides)
{
_xmlAttributeOverrides = xmlAttributeOverrides;
}
public XmlSerializerConfigurator() : this(new XmlAttributeOverrides())
{
}
/// <summary>
/// Adds attributes to properties or fields and strongly typed
/// </summary>
/// <typeparam name="TData"></typeparam>
/// <param name="property"></param>
/// <param name="xmlAttributes"></param>
/// <returns></returns>
public XmlSerializerConfigurator<T> AddPropertyOrFieldAttributes<TData>(Expression<Func<T, TData>> property,
params Attribute[] xmlAttributes)
{
var memberName = property.GetName();
_xmlAttributeOverrides.Add(typeof (T), memberName,
new XmlAttributes(new CustomAttributeProvider(xmlAttributes)));
return this;
}
/// <summary>
/// Adds class level attributes
/// </summary>
/// <param name="xmlAttributes"></param>
/// <returns></returns>
public XmlSerializerConfigurator<T> AddClassLevelAttributes(params Attribute[] xmlAttributes)
{
_xmlAttributeOverrides.Add(typeof(T), new XmlAttributes(new CustomAttributeProvider(xmlAttributes)));
return this;
}
/// <summary>
/// Creates an XmlSerializerConfigurator that is tied to the main one
/// </summary>
/// <typeparam name="K"></typeparam>
/// <returns></returns>
public XmlSerializerConfigurator<K> ChildClassConfigurator<K>()
{
// passes in own XmlAttributeOverrides and since object reference it will fill the same object
return new XmlSerializerConfigurator<K>(_xmlAttributeOverrides);
}
/// <summary>
/// Returns back an XmlSerializer with this configuration
/// </summary>
/// <returns></returns>
public XmlSerializer GetSerializer()
{
return new XmlSerializer(typeof(T), _xmlAttributeOverrides);
}
}
公共类XmlSerializerConfiguration
{
私有只读XmlAttributeOverrides\u XmlAttributeOverrides;
公共XmlSerializerConfiguration(XmlAttributeOverrides XmlAttributeOverrides)
{
_xmlAttributeOverrides=xmlAttributeOverrides;
}
公共XmlSerializerConfiguration():此(新XmlAttributeOverrides())
{
}
///
///将属性添加到属性或字段以及强类型
///
///
///
///
///
公共XmlSerializerConfiguration AddPropertyOrFieldAttributes(表达式属性,
参数属性[]xmlAttributes)
{
var memberName=property.GetName();
_添加(typeof(T),memberName,
新的XmlAttributes(新的CustomAttributeProvider(XmlAttributes));
归还这个;
}
///
///添加类级属性
///
///
///
公共XmlSerializerConfiguration AddClassLevelAttributes(参数属性[]xmlAttributes)
{
_Add(typeof(T),新的XmlAttributes(新的CustomAttributeProvider(XmlAttributes));
归还这个;
}
///
///创建绑定到主XmlSerializerConfiguration的XmlSerializerConfiguration
///
///
///
公共XmlSerializerConfiguration子类配置器()
{
//传入自己的XmlAttributeOverrides,由于对象引用,它将填充相同的对象
返回新的XmlSerializerConfiguration(_xmlAttributeOverrides);
}
///
///返回具有此配置的XmlSerializer
///
///
公共XmlSerializer GetSerializer()
{
返回新的XmlSerializer(typeof(T),\u xmlAttributeOverrides);
}
}
该类允许您配置序列化程序的类/属性上的属性,而不依赖于buddy类。当类有另一个类作为其属性时,我们需要ChildClassAttributes来允许配置该类
我还使用了一个扩展方法,该方法从名为GetName的表达式返回属性或字段
public static string GetName<TEntity, TData>(this Expression<Func<TEntity, TData>> field)
{
var name = "";
if (field.Body is MemberExpression)
{
var body = field.Body as MemberExpression;
var ebody = body.Expression as MemberExpression;
if (ebody != null)
{
name = ebody.Member.Name + ".";
}
name = name + body.Member.Name;
}
else if (field.Body is UnaryExpression)
{
var ubody = field.Body as UnaryExpression;
var body = ubody.Operand as MemberExpression;
var ebody = body.Expression as MemberExpression;
if (ebody != null)
{
name = ebody.Member.Name + ".";
}
name = name + body.Member.Name;
}
else if (field.Body is ConstantExpression)
{
var cbody = field.Body as ConstantExpression;
name = cbody.Value.ToString();
}
else
{
throw new InvalidOperationException(String.Format("{0} not supported.", field));
}
return name;
}
公共静态字符串GetName(此表达式字段)
{
var name=“”;
if(field.Body是MemberExpression)
{
var body=字段。body作为MemberExpression;
var ebody=body.Expression作为MemberExpression;
if(ebody!=null)
{
name=ebody.Member.name+”;
}
name=name+body.Member.name;
}
else if(field.Body是UnaryExpression)
{
var ubody=字段。Body作为一元表达式;
var body=ubody.操作数作为MemberExpression;
var ebody=body.Expression作为MemberExpression;
if(ebody!=null)
{
name=ebody.Member.name+”;
}
name=name+body.Member.name;
}
else if(field.Body为恒压)
{
var cbody=字段。主体为恒定压力;
name=cbody.Value.ToString();
}
其他的
{
抛出新的InvalidOperationException(String.Format(“{0}不受支持。”,字段));
}
返回名称;
}
现在您可以这样使用/配置它
var xmlConfiguration = new XmlSerializerConfigurator<Group>();
xmlConfiguration.AddPropertyOrFieldAttributes(x => x.Employees, new XmlArrayItemAttribute(typeof (Employee)),
new XmlArrayItemAttribute(typeof (Manager)));
xmlConfiguration.AddClassLevelAttributes(new XmlRootAttribute("GroupName"));
var childConfiguration = xmlConfiguration.ChildClassConfigurator<Employee>();
childConfiguration.AddPropertyOrFieldAttributes(x => x.FullName, new XmlElementAttribute("Name"));
var xmlSerializer = xmlConfiguration.GetSerializer();
var-xmlConfiguration=new-XmlSerializerConfigurator();
xmlConfiguration.AddPropertyOrFieldAttributes(x=>x.Employees,新的XmlArrayItemAttribute(typeof(Employees)),
新的XmlArrayItemAttribute(typeof(Manager));
AddClassLevelAttributes(新的XmlRootAttribute(“GroupName”));
var childConfiguration=xmlConfiguration.ChildClassConfigurator();
AddPropertyOrFieldAttributes(x=>x.FullName,新的XmlElementAttribute(“名称”);
var xmlSerializer=xmlConfiguration.GetSerializer();
现在,所有属性和字段都是强类型的,在buddy类中不重复 谢谢,伙计,我很感激!