C# Windows 8 phone保存和加载对象列表
我想保存并加载我的历史记录列表,其中包含历史记录条目对象。我试图通过隔离存储来实现这一点,这样当用户打开和关闭应用程序时,他们的浏览历史不会丢失。它会被保存,单击应用程序后即可加载。我环顾了一下四周,在stackoverflow上看到了这个问题,我试着去理解它,但遇到了很多错误 这是密码 历史入门类C# Windows 8 phone保存和加载对象列表,c#,windows-phone-8,serialization,deserialization,isolatedstoragefile,C#,Windows Phone 8,Serialization,Deserialization,Isolatedstoragefile,我想保存并加载我的历史记录列表,其中包含历史记录条目对象。我试图通过隔离存储来实现这一点,这样当用户打开和关闭应用程序时,他们的浏览历史不会丢失。它会被保存,单击应用程序后即可加载。我环顾了一下四周,在stackoverflow上看到了这个问题,我试着去理解它,但遇到了很多错误 这是密码 历史入门类 public string URL { get; set; } public string timestamp { get; set; } public string date { get; set
public string URL { get; set; }
public string timestamp { get; set; }
public string date { get; set; }
主页代码:
using System.Xml.Serialization;
using System.Collections.ObjectModel;
using System.IO;
List<HistoryEntry> urls = new List<HistoryEntry>();
public HistoryEntry selectedHistory;
public MainPage()
{
InitializeComponent();
Deserialize<>(urls, ???);
}
void Browser_Navigated(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
HistoryEntry urlObj = new HistoryEntry();
urlObj.URL = url;
urlObj.timestamp = DateTime.Now.ToString("HH:mm");
urlObj.date = url.Remove(url.LastIndexOf('.'));
urls.Add(urlObj);
textBox1.Text = url;
listBox.ItemsSource = null;
listBox.ItemsSource = urls;
Serialize(urlObj, urls);
}
private static void Serialize(string fileName, object source)
{
var userStore = IsolatedStorageFile.GetUserStoreForApplication();
using (var stream = new IsolatedStorageFileStream(fileName, FileMode.Create, userStore))
{
XmlSerializer serializer = new XmlSerializer(source.GetType());
serializer.Serialize(stream, source);
}
}
public static void Deserialize<T>(ObservableCollection<T> list, string filename)
{
list = new ObservableCollection<T>();
var userStore = IsolatedStorageFile.GetUserStoreForApplication();
if (userStore.FileExists(filename))
{
using (var stream = new IsolatedStorageFileStream(filename, FileMode.Open, userStore))
{
XmlSerializer serializer = new XmlSerializer(list.GetType());
var items = (ObservableCollection<T>)serializer.Deserialize(stream);
foreach (T item in items)
{
list.Add(item);
}
}
}
}
Serialize具有一些无效参数,这与调用反序列化时相同。要发送给该方法的适当值是什么,这将成功保存和加载历史对象
提前感谢您:
如果您需要更多详细信息,请发表评论,我很乐意进一步详细解释:您是否使用MemoryStream尝试过这种方法,它对Win 8起到了作用: 要序列化:
希望有帮助 FileMode不存在意味着您尚未添加命名空间。确保你有这个。使用System.IO名称空间;谢谢,我已经做了编辑。尽管调用Serialize和Deserialize时仍有错误,因为它有一些无效参数@安南山
MemoryStream sessionData = new MemoryStream();
DataContractSerializer serializer = new
DataContractSerializer(typeof(ObservableCollection<NewsByTag>));
serializer.WriteObject(sessionData, data);
StorageFile file = await ApplicationData.Current.LocalFolder
.CreateFileAsync(sFileName);
using (Stream fileStream = await file.OpenStreamForWriteAsync())
{
sessionData.Seek(0, SeekOrigin.Begin);
await sessionData.CopyToAsync(fileStream);
await fileStream.FlushAsync();
}
StorageFile file = await ApplicationData.Current.LocalFolder.
GetFileAsync(sFileName);
using (IInputStream inStream = await file.OpenSequentialReadAsync())
{
DataContractSerializer serializer =
new DataContractSerializer(typeof(ObservableCollection<NewsByTag>));
var data = (ObservableCollection<NewsByTag>)serializer
.ReadObject(inStream.AsStreamForRead());
}