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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Storage;
using Windows.Storage.Streams;
using Windows.System;
using Windows.UI.Popups;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
// “空白页”项模板在 http://go.microsoft.com/fwlink/?LinkId=391641 上有介绍
//using System.Runtime.InteropServices.WindowsRuntime;//P164
namespace App3
{
/// <summary>
/// 可用于自身或导航至 Frame 内部的空白页。
/// </summary>
public sealed partial class MainPage : Page
{
//必应壁纸地址
private string TodayPictureUri = "http://appserver.m.bing.net/BackgroundImageService/TodayImageService.svc/GetTodayImage?dateOffset=0&urlEncodeHeaders=true&osName=windowsPhone&osVersion=8.10&orientation=480x800&deviceName=WP8&mkt=zh-CN";
public MainPage()
{
this.InitializeComponent();
//设置动画用
this.NavigationCacheMode = NavigationCacheMode.Required;
sliderPanel.PointerExited += sliderPanel_PointerExited;
//设置壁纸链接
background.UriSource = new Uri(TodayPictureUri);
saveButton.IsEnabled = true;
}
//指针移出面板
void sliderPanel_PointerExited(object sender,PointerRoutedEventArgs e) {
topTransform.Y = -240;
}
/// <summary>
/// 在此页将要在 Frame 中显示时进行调用。
/// </summary>
/// <param name="e">描述如何访问此页的事件数据。
/// 此参数通常用于配置页。</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
// TODO: 准备此处显示的页面。
// TODO: 如果您的应用程序包含多个页面，请确保
// 通过注册以下事件来处理硬件“后退”按钮:
// Windows.Phone.UI.Input.HardwareButtons.BackPressed 事件。
// 如果使用由某些模板提供的 NavigationHelper，
// 则系统会为您处理该事件。
}
//开始动画：滑下设置透明度面板
private void AppBarButton_Click_showSlider(object sender, RoutedEventArgs e)
{
showSlider.Begin();
}
//保存壁纸:代码来自林政老师的书上的实例，不过修改为了保存至媒体库
private async void saveWallpaper(object sender, RoutedEventArgs e)
{
List<Byte> allBytes = new List<byte>();
using (var response = await HttpWebRequest.Create(TodayPictureUri).GetResponseAsync())
{
using (Stream responseStream = response.GetResponseStream())
{
byte[] buffer = new byte[4000];
int bytesRead = 0;
while ((bytesRead = await responseStream.ReadAsync(buffer, 0, 4000)) > 0)
{
allBytes.AddRange(buffer.Take(bytesRead));
}
}
}
/*var file = await ApplicationData.Current.LocalFolder.CreateFileAsync(//ApplicationData只能保存在应用的私有文件存储中，在“照片”应用内看不到
"bingPicture" + DateTime.Now.Ticks + ".jpg", CreationCollisionOption.ReplaceExisting);
await FileIO.WriteBytesAsync(file, allBytes.ToArray());
*/
var file1 = await KnownFolders.SavedPictures.CreateFileAsync("jlulib_bingWallpaper_" + DateTime.Today.Ticks + ".jpg", CreationCollisionOption.ReplaceExisting);
await FileIO.WriteBytesAsync(file1, allBytes.ToArray());
//http://msdn.microsoft.com/zh-cn/library/windows/apps/xaml/dn639127.aspx KnownFolders：在 Windows Phone 应用中访问媒体库（Windows Phone 应用商店应用）
ContentDialog dialog = new ContentDialog()
{//http://www.bcmeng.com/contentdialog/ 在 Windows Phone 应用中访问媒体库（Windows Phone 应用商店应用）
Title = "保存成功", //标题
Content = "壁纸已保存至"保存的图片"",//内容
FullSizeDesired=false, //是否全屏展示
PrimaryButtonText = "知道了",//第一个按钮内容
//SecondaryButtonText = "No, Dont!"
};
await dialog.ShowAsync();
//dialog.SecondaryButtonClick += dialog_SecondaryButtonClick;//第二个按钮单击事件
//dialog.PrimaryButtonClick += dialog_PrimaryButtonClick;
//ContentDialogResult result = await dialog.ShowAsync();
//if (result == ContentDialogResult.Primary) { } //处理第一个按钮的返回
//else if (result == ContentDialogResult.Secondary) { }//处理第二个按钮的返回
}//2014-11-10 18:00
}
}
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