/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="sender">
/// The source of the event; typically <see cref="NavigationHelper"/>
/// </param>
/// <param name="e">Event data that provides both the navigation parameter passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
/// a dictionary of state preserved by this page during an earlier
/// session. The state will be null the first time a page is visited.</param>
private void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
{
// About message
string[] aboutInfo = CommonTaskClient.AboutInfo();
this.DefaultViewModel["AppTitle"] = aboutInfo[0];
this.DefaultViewModel["DetailInfo"] = aboutInfo[1];
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="sender">
/// The source of the event; typically <see cref="NavigationHelper"/>
/// </param>
/// <param name="e">Event data that provides both the navigation parameter passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
/// a dictionary of state preserved by this page during an earlier
/// session. The state will be null the first time a page is visited.</param>
private void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
{
PostCodeItem postCodeItem = (PostCodeItem)e.NavigationParameter;
this.DefaultViewModel[PostCodeItemName] = postCodeItem;
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="sender">
/// The source of the event; typically <see cref="NavigationHelper"/>.
/// </param>
/// <param name="e">Event data that provides both the navigation parameter passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
/// a dictionary of state preserved by this page during an earlier
/// session. The state will be null the first time a page is visited.</param>
private void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
{
// TODO: Create an appropriate data model for your problem domain to replace the sample data.
_currentDistrict = (District)e.NavigationParameter;
this.DefaultViewModel[DistrictDataName] = _currentDistrict;
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="sender">
/// The source of the event; typically <see cref="NavigationHelper"/>.
/// </param>
/// <param name="e">Event data that provides both the navigation parameter passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
/// a dictionary of state preserved by this page during an earlier
/// session. The state will be null the first time a page is visited.</param>
private async void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
{
if (ApplicationData.Current.LocalSettings.Values["Launched"] == null)
{
ApplicationData.Current.LocalSettings.Values["Launched"] = true;
_isUpdateChecked = true;
_isDownloading = true;
ShowUpdateStatus("正在准备数据");
UpdateProgress updateProgress = ChangeProgress;
try
{
await CommonTaskClient.Download(updateProgress);
await CommonTaskClient.UpdateFileVersion();
}
catch (HttpRequestException)
{
ShowUpdateStatus("下载邮编数据失败");
_isDeletingFile = true;
}
if (_isDeletingFile)
{
var folder = ApplicationData.Current.LocalFolder;
var file = await folder.GetFileAsync("DistrictData.json");
await file.DeleteAsync();
var backupFile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///DataModel/DistrictDataBackup.json"));
// var backupFile = await StorageFile.GetFileFromApplicationUriAsync(new Uri(@"ms-appx:///DataModel/DistrictData.json"));
backupFile.MoveAsync(folder, backupFile.DisplayName, NameCollisionOption.ReplaceExisting);
}
}
// TODO: Create an appropriate data model for your problem domain to replace the sample data
DistrictDataSource dataSource = DistrictDataSource.GetInstance();
try
{
await dataSource.GetDistrictData();
_defaultViewModel[DistrictDataSetName] = dataSource;
}
catch (FileNotFoundException)
{
ShowUpdateStatus("本地邮编数据库加载失败");
}
// Async check update
_isUpdateChecked = (e.PageState == null || !e.PageState.ContainsKey("IsUpdateChecked")) ? _isUpdateChecked : (bool)e.PageState["IsUpdateChecked"];
if (!_isUpdateChecked)
{
_isUpdateChecked = true;
bool isCheckUpdateSucceed = true;
ShowUpdateStatus("正在检查更新...");
_statusBar.ProgressIndicator.ShowAsync();
try
{
bool isUpdateAvailable = await CommonTaskClient.IsUpdateAvailable();
await Task.Delay(500);
if (isUpdateAvailable)
{
ShowUpdateStatus("邮编数据库有新版本");
MessageDialog updateAvalible = new MessageDialog("有可用的邮编数据库更新，要下载吗？", "提示");
updateAvalible.Commands.Add(new UICommand("开始下载", UpdateDialogCommanHander, 0));
updateAvalible.Commands.Add(new UICommand("以后再说", null, 1));
updateAvalible.DefaultCommandIndex = 0;
updateAvalible.CancelCommandIndex = 1;
await updateAvalible.ShowAsync();
}
else
{
ShowUpdateStatus("无可用更新");
_statusBar.ProgressIndicator.HideAsync();
}
}
catch (HttpRequestException)
{
isCheckUpdateSucceed = false;
}
catch (WebException)
{
isCheckUpdateSucceed = false;
}
if (!isCheckUpdateSucceed)
{
ShowUpdateStatus("获取更新失败");
_statusBar.ProgressIndicator.HideAsync();
}
await Task.Delay(500);
_defaultViewModel["UpdateStatus"] = "";
}
}
