從WP8中的xml讀取時出現System.InvalidOperationException

Question

這是如何在Windows Phone 8中創建空xml的后續問題。

我這樣做是為了創建xml：

public void create()
    {
        List<DataModel> __dataList = new List<DataModel>();

        XmlWriterSettings xmlWriterSettings = new XmlWriterSettings();
        xmlWriterSettings.Indent = true;

        using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
        {
            using (IsolatedStorageFileStream stream = myIsolatedStorage.OpenFile("Data.xml", FileMode.Create))
            {
                XmlSerializer serializer = new XmlSerializer(typeof(List<DataModel>));
                using (XmlWriter xmlWriter = XmlWriter.Create(stream, xmlWriterSettings))
                {
                    serializer.Serialize(stream, __dataList);
                }
            }
        }
    }

當我嘗試使用此代碼閱讀時，出現另一個System.InvalidOperationException

    public void read()
    {
        List<DataModel> __dataList = new List<DataModel>();
        try
        {
            using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
            {
                using (IsolatedStorageFileStream stream = myIsolatedStorage.OpenFile("Data.xml", FileMode.Open))
                {
                    XmlSerializer serializer = new XmlSerializer(typeof(List<DataModel>));
                    __dataList = (List<DataModel>)serializer.Deserialize(stream);
                }
            }
        }
        catch (Exception e)
        {
            string s = e.Message;
            e.ToString();
        }
    }

異常消息為“ XML文檔（2，118）中存在錯誤”。 我的代碼有什么問題？

編輯 ：內部異常是“在根級別的數據無效。第2行，位置118。”

編輯2 ：在反序列化之前，我使用StreamReader.ReadToEnd()讀取xml的內容，這是返回字符串： <?xml version="1.0" encoding="utf-8"?> <ArrayOfDataModel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" />

這是我第一次使用xml，因此問題可能很簡單，但我可能沒有意識到。 有什么幫助嗎？

Answer 1

下面的代碼還會給出錯誤嗎？ 數據模型的構造是什么？

      public void create()
  {
     List<DataModel> __dataList = new List<DataModel>();

     //XmlWriterSettings xmlWriterSettings = new XmlWriterSettings();
     //xmlWriterSettings.Indent = true;

     using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
     {
        using (IsolatedStorageFileStream stream = myIsolatedStorage.OpenFile("Data.xml", FileMode.Create))
        {
           try
           {
              XmlSerializer serializer = new XmlSerializer(typeof(List<DataModel>));
              //using (XmlWriter xmlWriter = XmlWriter.Create(stream, xmlWriterSettings))
              //{
              serializer.Serialize(stream, __dataList);
              //}
           }
           catch { }
        }
     }
  }

  public void read()
  {
     List<DataModel> __dataList = new List<DataModel>();
     try
     {
        using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
        {
           using (IsolatedStorageFileStream stream = myIsolatedStorage.OpenFile("Data.xml", FileMode.Open))
           {
              XmlSerializer serializer = new XmlSerializer(typeof(List<DataModel>));
              __dataList = (List<DataModel>)serializer.Deserialize(stream);
           }
        }
     }
     catch (Exception e)
     {
        string s = e.Message;
        e.ToString();
     }
  }

在某處：

public class DataModel
{ }

上面的代碼對我有用。