/// <summary>
/// 初始化单一实例应用程序对象。这是执行的创作代码的第一行，
/// 已执行，逻辑上等同于 main() 或 WinMain()。
/// </summary>
public App()
{
this.InitializeComponent();
this.Suspending += OnSuspending;
using (var db = new Data.PasswordContext())
{
db.Database.Migrate();
}
using (var db = new Data.HistoryContext())
{
db.Database.Migrate();
}
}
private async void AddressBox_TextChanged(AutoSuggestBox sender, AutoSuggestBoxTextChangedEventArgs args)
{
if (args.Reason == AutoSuggestionBoxTextChangeReason.SuggestionChosen)
{
return;
}
string text = sender.Text;
string[] result;
using (var db = new Data.HistoryContext())
{
var query = from Data.HistoryEntry item in db.Histories
where item.Url.Contains(text)
orderby item.Time descending
select item.Url;
result = await query.Take(10).Distinct().ToArrayAsync();
}
sender.ItemsSource = result;
}
/// <summary>
/// 导航到指定的地址。需要登录时自动弹出登录界面。导航失败时，自动导航到失败页面。
/// 不抛出异常。
/// </summary>
/// <param name="address">要导航到的地址</param>
/// <returns>导航是否成功</returns>
private async Task <bool> NavigateAsync(Uri address)
{
await ftpSemaphore.WaitAsync();
try
{
errorMessage.Visibility = Visibility.Collapsed;
progressBar.Visibility = Visibility.Visible;
progressBar.IsIndeterminate = true;
currentAddress = address;
// 显示新的地址
UriBuilder uriBuilder = new UriBuilder(currentAddress);
uriBuilder.UserName = string.Empty;
uriBuilder.Password = string.Empty;
addressBox.Text = uriBuilder.Uri.ToString();
// 不是ftp协议则抛出异常
if (address.Scheme != "ftp" && address.Scheme != "ftps")
{
throw new InvalidOperationException("只支持ftp协议");
}
// Host改变时重新连接
if (client == null)
{
client = CreateFtpClient(address, GetCredential(address.UserInfo), address.Scheme == "ftps");
await FtpConnectAsync(client);
}
else if (client.Host != address.Host ||
(client.EncryptionMode != FluentFTP.FtpEncryptionMode.None && address.Scheme == "ftp") ||
(client.EncryptionMode != FluentFTP.FtpEncryptionMode.Explicit && address.Scheme == "ftps") ||
(client.Port != 21 && address.Port < 0) ||
(client.Port != address.Port && address.Port >= 0) ||
!string.IsNullOrEmpty(address.UserInfo))
{
client.Disconnect();
client.Dispose();
client = CreateFtpClient(address, GetCredential(address.UserInfo), address.Scheme == "ftps");
await FtpConnectAsync(client);
}
// FTP路径可能包含#号，#号后面的内容会被归入Fragment。
string remotePath = address.LocalPath + address.Fragment;
listItemsVM.Clear();
foreach (var item in (await client.GetListingAsync(remotePath)).OrderBy(x => x.Name))
{
listItemsVM.Add(await FtpListItemViewModel.FromFtpListItemAsync(item));
}
using (Data.HistoryContext db = new Data.HistoryContext())
{
Data.HistoryEntry h = new Data.HistoryEntry
{
Time = DateTimeOffset.Now,
Url = uriBuilder.Uri.ToString()
};
await db.AddAsync(h);
await db.SaveChangesAsync();
}
return(true);
}
catch (FluentFTP.FtpCommandException exception)
{
if (exception.CompletionCode == "530")
{
errorMessage.Text = "认证失败，请尝试登录。";
loginButton.Flyout.ShowAt(loginButton);
loginErrorMessage.Visibility = Visibility.Visible;
}
else
{
errorMessage.Text = string.Format(
"发生错误，FTP返回代码：{0}。详细信息：\n{1}", exception.CompletionCode, exception.Message);
}
errorMessage.Visibility = Visibility.Visible;
listItemsVM.Clear();
return(false);
}
catch (Exception exception)
{
errorMessage.Text = string.Format("发生错误。详细信息：\n{0}", exception.Message);
errorMessage.Visibility = Visibility.Visible;
listItemsVM.Clear();
return(false);
}
finally
{
progressBar.Visibility = Visibility.Collapsed;
ftpSemaphore.Release();
}
}
