將實體框架對象實例持久化為xml

Question

我正在使用從帶實體框架的數據庫生成的域模型。 我如何在/從xml序列化/反序列化此域模型的對象實例？ 我可以使用.edmx文件嗎？ 任何代碼示例？ 謝謝

Answer 1

您可以使用XmlSerializer類。 WCF還引入了DataContractSerializer 。 例如，如果您想使用XmlSerializer類將現有對象序列化為XML：

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

並將XML反序列化回現有模型：

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

Answer 2

我使用此VB代碼將EF模型序列化為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

編輯：您也可以像這樣使用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

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