/// <summary>
/// Called when parameters change.
/// </summary>
/// <returns>The asynchronous test.</returns>
protected override async Task OnParametersSetAsync()
{
if (Uid != lastUid)
{
lastUid = Uid;
await LoadingService.WrapExecutionAsync(
async() =>
History =
await DocumentService.LoadDocumentHistoryAsync(lastUid));
}
await base.OnParametersSetAsync();
}
/// <summary>
/// Called when the <see cref="Document"/> identifier is set.
/// </summary>
/// <returns>An asynchronous task.</returns>
protected override async Task OnParametersSetAsync()
{
var newUid = WebUtility.UrlDecode(Uid);
if (newUid != uid)
{
var history = string.Empty;
var query = NavigationHelper.GetQueryString(
NavigationService.Uri);
if (query.ContainsKey(nameof(history)))
{
history = query[nameof(history)];
}
Loading = false;
NotFound = false;
uid = newUid;
try
{
Loading = true;
if (string.IsNullOrWhiteSpace(history))
{
await LoadingService.WrapExecutionAsync(
async() => Document = await
DocumentService.LoadDocumentAsync(uid));
NotFound = Document == null;
Audit = false;
}
else
{
await LoadingService.WrapExecutionAsync(
async() => Document = await
DocumentService.LoadDocumentSnapshotAsync(Guid.Parse(history), uid));
Audit = true;
NotFound = Document == null;
}
Loading = false;
await TitleService.SetTitleAsync($"Viewing {Title}");
}
catch
{
NotFound = true;
}
}
await base.OnParametersSetAsync();
}
