f4334277
 Hu Chunming
提交3rdparty
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//*********************************************************
//
// Copyright (c) Microsoft. All rights reserved.
// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
//
//*********************************************************
//
// SuspensionManager.h
// Declaration of the SuspensionManager class
//
#pragma once
#include <ppltasks.h>
namespace SDKSample
{
namespace Common
{
/// <summary>
/// SuspensionManager captures global session state to simplify process lifetime management
/// for an application. Note that session state will be automatically cleared under a variety
/// of conditions and should only be used to store information that would be convenient to
/// carry across sessions, but that should be disacarded when an application crashes or is
/// upgraded.
/// </summary>
ref class SuspensionManager sealed
{
internal:
static void RegisterFrame(Windows::UI::Xaml::Controls::Frame^ frame, Platform::String^ sessionStateKey);
static void UnregisterFrame(Windows::UI::Xaml::Controls::Frame^ frame);
static Concurrency::task<void> SaveAsync(void);
static Concurrency::task<void> RestoreAsync(void);
static property Windows::Foundation::Collections::IMap<Platform::String^, Platform::Object^>^ SessionState
{
Windows::Foundation::Collections::IMap<Platform::String^, Platform::Object^>^ get(void);
};
static Windows::Foundation::Collections::IMap<Platform::String^, Platform::Object^>^ SessionStateForFrame(
Windows::UI::Xaml::Controls::Frame^ frame);
private:
static void RestoreFrameNavigationState(Windows::UI::Xaml::Controls::Frame^ frame);
static void SaveFrameNavigationState(Windows::UI::Xaml::Controls::Frame^ frame);
};
}
}
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