将实体框架对象实例持久化到 xml答案

【问题标题】：persist Entity Framework object instance to xml将实体框架对象实例持久化到 xml
【发布时间】：2011-03-13 01:51:35
【问题描述】：

我正在使用从带有实体框架的数据库生成的域模型。如何将此域模型的对象实例序列化/反序列化到/从 xml？我可以为此使用 .edmx 文件吗？任何代码示例？谢谢

【问题讨论】：

【解决方案1】：

您可以使用XmlSerializer 类。还有 WCF 引入的DataContractSerializer。例如，如果您想使用 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);
}

并将 XML 反序列化回现有模型：

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

【讨论】：

【解决方案2】：

我使用此 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

【讨论】：