如何将动态列表框项保存到文本文件WP8
本文关键字:保存 文本 文件 WP8 动态 列表 | 更新日期: 2023-09-27 18:05:47
我有一个ListBox,运行时为空,但项目(按钮)是动态添加的。我在我的解决方案收藏夹。txt中有一个文本文件,我需要这个列表框。要保存以供将来显示的项目名称。在XAML中,我有两个按钮放置在不同的列表框中:
<ListBox x:Name="mainlist" >
<Button x:Name="but1" / >
</ListBox>
<ListBox x:Name="favlist" >
<Button x:Name="fav1" Click="Button_Click_2" Tag="but1" />
</ListBox>
在。cs中,我通过fav1搜索but1。标记并将其添加到收藏列表框:
private void Button_Click_2(object sender, RoutedEventArgs e)
{
var button = (Button)sender;
button.Opacity = 0;
button.Click -= Button_Click_2;
object item = mainlist.FindName(button.Tag.ToString());
if (item is Button)
{
Button findedBut = (Button)item;
Button newbut = new Button();
newbut.Name = findedBut.Name;
//add this button to other ListBox called Favorites that is empty
Favorites.Items.Add(newbut);
}
}
我想保存收藏夹项目为将来启动,因为如果我关闭应用程序的列表框收藏夹是空的。类似于函数:
void updateFavs()
{
// this is not working ((
using (FileStream S = File.Open((new Uri(@"favorites.txt", UriKind.Relative)), FileMode.Open))
{
using (StreamWriter st = new StreamWriter(S))
{
foreach (var aa in Favorites.Items)
st.WriteLine(aa.ToString());
}
}
}
,每次在Application.Current.Terminate();
之前调用该函数也许还有其他我不知道的方式…也许是隔离存储?像在这里:http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj681698 (v = vs.105) . aspx
我认为你必须使用隔离存储:
''Create file and save data
using (IsolatedStorageFileStream stream = new IsolatedStorageFileStream("file.txt", FileMode.Create, IsolatedStorageFile.GetUserStoreForApplication()))
{
using (StreamWriter writer = new StreamWriter(stream))
{
writer.WriteLine(1);
writer.WriteLine("Hello");
}
}
''To read from the file
using (IsolatedStorageFileStream stream = new IsolatedStorageFileStream("file.txt", FileMode.Open, IsolatedStorageFile.GetUserStoreForApplication()))
{
using (StreamReader reader = new StreamReader(stream))
{
int number = Convert.ToInt32(reader.ReadLine());
string text = reader.ReadLine();
}
}