[英]How to save the state of a checkbox
如何使用C#在Visual Studio Ultimate 2012中保存复选框的状态。 即使在我再次重新打开应用程序终止后,最后查看的状态应该可见? 该怎么办? 你可以帮我解释一下代码吗?
提前致谢.....
J.Visali
在这里,您应该找到所需的一切: http : //msdn.microsoft.com/en-us/library/windows/apps/hh986968.aspx
对于大多数Windows 8商店应用程序,数据可以大致分为两类:
本文数据持久性和应用程序生命周期管理应该帮助您了解您需要什么类型的持久性。 数据可以作为键值对中的应用程序设置保留,但也可以保存为应用程序文件 ,通常存储在应用程序具有的沙盒文件系统访问中。
作为一个快速示例,您应该:
// Reference to Local Application Settings.
Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
// Reference to Roaming Application Settings.
Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.RoamingSettings;
// Persisting simple Application Settings.
localSettings.Values["myOption1"] = myBox1.isChecked;
roamingSettings.Values["myOption2"] = myBox2.isChecked;
// Reading settings back.
var mySavedOption1 = (bool)(localSettings.Values["myOption1"]);
var mySavedOption2 = (bool)(roamingSettings.Values["myOption2"]);
编辑
有效的测试示例:
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
// Reference to Local Application Settings.
Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
// Reading settings back.
object mySavedOption1;
localSettings.Values.TryGetValue("myOption1Key", out mySavedOption1);
if (mySavedOption1 != null)
myOption1.IsChecked = (bool)mySavedOption1;
}
private void myOption1_Checked_1(object sender, RoutedEventArgs e)
{
// Reference to Local Application Settings.
Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
// Persisting simple Application Settings.
localSettings.Values["myOption1Key"] = myOption1.IsChecked;
}
在xaml中: <CheckBox x:Name="myOption1" Grid.Row="1" Checked="myOption1_Checked_1" Unchecked="myOption1_Checked_1"/>
您可以使用该应用提供的本地存储:
Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
localSettings.Values["CheckboxState"] = "checked";
然后,您可以通过从值中提取状态来使用相同的localSettings
进行恢复。
应用程序设置是存储应用程序数据的最佳方式... http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.applicationdata.localsettings的最佳解决方案
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