正在将ObservableCollection写入文件
本文关键字:文件 ObservableCollection | 更新日期: 2023-09-27 18:00:54
我有什么:
我目前有这样的课程:
class Storico
{
private string rigaStorico;
public string Name
{
get { return rigaStorico; }
set { rigaStorico = value; }
}
public Storico(string storic)
{
rigaStorico = storic;
}
}
此可观测集合:
ObservableCollection<Storico> rigaStorico = new ObservableCollection<Storico>();
这个DataTemplate,位于一个LongListSelector:中
<DataTemplate>
<Grid>
<TextBlock Text="●" Margin="0,8,0,0" Foreground="#EE7B00"/>
<TextBlock Text="{Binding Name}" ManipulationStarted="TextBlock_ManipulationStarted" ManipulationCompleted="TextBlock_ManipulationCompleted">
<toolkit:ContextMenuService.ContextMenu>
<toolkit:ContextMenu Name="ContextMenu" >
<toolkit:MenuItem Name="DeleteItem" Header="Delete Item" Click="DeleteItem_Click"/>
</toolkit:ContextMenu>
</toolkit:ContextMenuService.ContextMenu>
</TextBlock>
</Grid>
</DataTemplate>
我需要做什么:
实际上,我需要将包含在LongListSelector中的所有字符串,这可能类似于:
String1
String2
String3
并以相反的顺序将它们写入到IsolatedStorage中的文件中。类似这样的东西:
String3
String2
String1
显然,Storico的物品来源是rigaStorico本身:
Storico.ItemsSource = rigaStorico;
我希望我的目标是明确的,我提供了解决它所需的所有东西。
试试这个:
IsolatedStorageFile savegameStorage = IsolatedStorageFile.GetUserStoreForApplication();
IsolatedStorageFileStream fs = null;
using (fs = savegameStorage.CreateFile("FILENAME"))
{
if (fs != null)
{
var index = 0;
foreach(var rigaStor in rigaStorico.Reverse())
{
byte[] bytes = Encoding.UTF8.GetBytes(rigaStor.Name);
fs.Write(bytes, index, bytes.Length);
index = bytes.Length;
}
}
}
不确定为什么需要相反的顺序,但您可以使用此FileStorage来写入数据。
FileStorage.WriteSharedData("MyItems.js", rigaStorico.Reverse());
FileStorage在引擎盖下使用json.net,如果你想的话,你可以做:
var storage = IsolatedStorageFile.GetUserStoreForApplication();
using (var fileStream = storage.CreateFile(fileName))
{
//Write the data
using (var isoFileWriter = new StreamWriter(fileStream))
{
var json = JsonConvert.SerializeObject(rigaStorico.Reverse());
isoFileWriter.WriteLine(json);
}
}
感谢您的帮助。我用以下代码解决了我的问题:
string[] contenutoStorico = rigaStorico.Select(x => x.Name).ToArray();
IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication();
using (StreamWriter writeFile = new StreamWriter(new IsolatedStorageFileStream("history.txt", FileMode.Create, FileAccess.Write, myIsolatedStorage)))
{
for (int i = 0; i < contenutoStorico.Length; i++)
{
writeFile.WriteLine(contenutoStorico[contenutoStorico.Length-i-1]);
}
writeFile.Close();
}