DataContractResolver.TryResolveType 方法

定义

命名空间:

System.Runtime.Serialization

程序集:

System.Runtime.Serialization.Xml.dll

Source:

DataContractResolver.cs

在序列化期间，重写此方法以将数据协定类型映射到 xsi:type 名称和命名空间。

public:
 abstract bool TryResolveType(Type ^ type, Type ^ declaredType, System::Runtime::Serialization::DataContractResolver ^ knownTypeResolver, [Runtime::InteropServices::Out] System::Xml::XmlDictionaryString ^ % typeName, [Runtime::InteropServices::Out] System::Xml::XmlDictionaryString ^ % typeNamespace);

public abstract bool TryResolveType (Type type, Type? declaredType, System.Runtime.Serialization.DataContractResolver knownTypeResolver, out System.Xml.XmlDictionaryString? typeName, out System.Xml.XmlDictionaryString? typeNamespace);

abstract member TryResolveType : Type * Type * System.Runtime.Serialization.DataContractResolver * XmlDictionaryString * XmlDictionaryString -> bool

Public MustOverride Function TryResolveType (type As Type, declaredType As Type, knownTypeResolver As DataContractResolver, ByRef typeName As XmlDictionaryString, ByRef typeNamespace As XmlDictionaryString) As Boolean

参数

type

Type

要映射的类型。

declaredType

Type

在数据协定中声明的类型。

knownTypeResolver

DataContractResolver

已知类型的解析器。

typeName

XmlDictionaryString

xsi:type 名称。

typeNamespace

XmlDictionaryString

xsi:type 命名空间。

返回

Boolean

如果映射成功，则为 true；否则为 false。

示例

下面的示例演示 TryResolveType 方法的实现。

// Used at serialization
// Maps any Type to a new xsi:type representation
public override bool TryResolveType(Type type, Type declaredType, DataContractResolver knownTypeResolver, out XmlDictionaryString typeName, out XmlDictionaryString typeNamespace)
{
    string name = type.Name;
    string namesp = type.Namespace;
    typeName = new XmlDictionaryString(XmlDictionary.Empty, name, 0);
    typeNamespace = new XmlDictionaryString(XmlDictionary.Empty, namesp, 0);
    if (!dictionary.ContainsKey(type.Name))
    {
        dictionary.Add(name, typeName);
    }
    if (!dictionary.ContainsKey(type.Namespace))
    {
        dictionary.Add(namesp, typeNamespace);
    }
    return true;
}

注解

如果您想要在您的实现内使用已知类型的解析逻辑，则对它的引用将会作为 knownTypeResolver 参数传入。