将Entity Framework对象实例持久化为XML。

Question

我正在使用由Entity Framework生成的数据库领域模型。如何将此领域模型的对象实例序列化/反序列化为XML？我可以使用.edmx文件吗？有任何代码示例吗？ 谢谢。

- user603007

Answer 1

你可以使用 XmlSerializer 类。还有一个 DataContractSerializer，它是随 WCF 一起引入的。例如，如果你想使用 XmlSerializer 类将现有对象序列化为 XML：

SomeModel model = ...
var serializer = new XmlSerializer(typeof(SomeModel));
using (var writer = XmlWriter.Create("foo.xml"))
{
    serializer.Serialize(writer, model);
}

同时，将XML反序列化为现有模型：

var serializer = new XmlSerializer(typeof(SomeModel));
using (var reader = XmlReader.Create("foo.xml"))
{
    var model = (SomeModel)serializer.Deserialize(reader);
}

- Darin Dimitrov

Answer 2

我使用这段VB代码将我的EF模型序列化为Xml：

 Try
     Dim serializer = New XmlSerializer(GetType(GestionEDLService.Biens))
     Dim localFolder As StorageFolder = ApplicationData.Current.LocalFolder
     Dim sampleFile As StorageFile = Await localFolder.CreateFileAsync("dataFile.xml", CreationCollisionOption.OpenIfExists)
     Dim stream As Stream = Await sampleFile.OpenStreamForWriteAsync()

     serializer.Serialize(stream, MyEFModel.MyEntity)

 Catch ex As Exception
     Debug.WriteLine(ex.ToString)
 End Try

编辑：您也可以像这样使用DataContractSerializer

Imports System.Runtime.Serialization

Public Sub WriteToStream(sw As System.IO.Stream)

    Dim dataContractSerializer As New DataContractSerializer(GetType(MyDataSource))

    dataContractSerializer.WriteObject(sw, _MyDataSource)

End Sub

Public Sub ReadFromStream(sr As System.IO.Stream)

    Dim dataContractSerializer As New DataContractSerializer(GetType(MyDataSource))

    _MyDataSource = dataContractSerializer.ReadObject(sr)

End Sub

HTH

- Cédric Bellec