DataContractResolver.TryResolveType 方法

定義

命名空間:
System.Runtime.Serialization
組件:
System.Runtime.Serialization.dll, System.Runtime.Serialization.Xml.dll
組件:
System.Runtime.Serialization.dll
組件:
netstandard.dll

在序列化時，覆寫此方法，將資料合約類型映射到名稱 xsi:type 與命名空間。

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

參數

type
Type

要標記的類型。

declaredType
Type

資料合約中宣告的類型。

knownTypeResolver
DataContractResolver

已知型別解析器。

typeName
XmlDictionaryString

xsi：type 名稱。

typeNamespace
XmlDictionaryString

xsi：type 命名空間。

傳回

Boolean

true如果映射成功;否則，。 false

範例

以下範例展示了該 TryResolveType 方法的實作。

// 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;
}

備註

如果你想在實作中使用已知型別解析邏輯，會以參數方式傳遞 knownTypeResolver 該參考。

適用於