private async void Start_Click(object sender, RoutedEventArgs e)
{
// The value of 'AddressField' is set by the user and is therefore untrusted input. If we can't create a
// valid, absolute URI, we'll notify the user about the incorrect input.
Uri resourceUri = Helpers.TryParseHttpUri(AddressField.Text);
if (resourceUri == null)
{
rootPage.NotifyUser("Invalid URI.", NotifyType.ErrorMessage);
return;
}
Helpers.ScenarioStarted(StartButton, CancelButton, OutputField);
rootPage.NotifyUser("In progress", NotifyType.StatusMessage);
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, resourceUri);
MeteredConnectionPriority priority = MeteredConnectionPriority.Low;
if (MediumRadio.IsChecked.Value)
{
priority = MeteredConnectionPriority.Medium;
}
else if (HighRadio.IsChecked.Value)
{
priority = MeteredConnectionPriority.High;
}
request.Properties[HttpMeteredConnectionFilter.MeteredConnectionPriorityPropertyName] = priority;
// This sample uses a "try" in order to support TaskCanceledException.
// If you don't need to support cancellation, then the "try" is not needed.
try
{
HttpRequestResult result = await httpClient.TrySendRequestAsync(request).AsTask(cts.Token);
if (result.Succeeded)
{
await Helpers.DisplayTextResultAsync(result.ResponseMessage, OutputField, cts.Token);
rootPage.NotifyUser("Completed", NotifyType.StatusMessage);
}
else
{
Helpers.DisplayWebError(rootPage, result.ExtendedError);
}
}
catch (TaskCanceledException)
{
rootPage.NotifyUser("Request canceled.", NotifyType.ErrorMessage);
}
Helpers.ScenarioCompleted(StartButton, CancelButton);
}
private async void Start_Click(object sender, RoutedEventArgs e)
{
Uri resourceAddress;
// The value of 'AddressField' is set by the user and is therefore untrusted input. If we can't create a
// valid, absolute URI, we'll notify the user about the incorrect input.
if (!Helpers.TryGetUri(AddressField.Text, out resourceAddress))
{
rootPage.NotifyUser("Invalid URI.", NotifyType.ErrorMessage);
return;
}
Helpers.ScenarioStarted(StartButton, CancelButton, OutputField);
rootPage.NotifyUser("In progress", NotifyType.StatusMessage);
try
{
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, resourceAddress);
MeteredConnectionPriority priority = MeteredConnectionPriority.Low;
if (MediumRadio.IsChecked.Value)
{
priority = MeteredConnectionPriority.Medium;
}
else if (HighRadio.IsChecked.Value)
{
priority = MeteredConnectionPriority.High;
}
request.Properties["meteredConnectionPriority"] = priority;
HttpResponseMessage response = await httpClient.SendRequestAsync(request).AsTask(cts.Token);
await Helpers.DisplayTextResultAsync(response, OutputField, cts.Token);
rootPage.NotifyUser("Completed", NotifyType.StatusMessage);
}
catch (TaskCanceledException)
{
rootPage.NotifyUser("Request canceled.", NotifyType.ErrorMessage);
}
catch (Exception ex)
{
rootPage.NotifyUser("Error: " + ex.Message, NotifyType.ErrorMessage);
}
finally
{
Helpers.ScenarioCompleted(StartButton, CancelButton);
}
}
private async void Start_Click(object sender, RoutedEventArgs e)
{
Helpers.ScenarioStarted(StartButton, CancelButton, OutputField);
rootPage.NotifyUser("In progress", NotifyType.StatusMessage);
try
{
// 'AddressField' is a disabled text box, so the value is considered trusted input. When enabling the
// text box make sure to validate user input (e.g., by catching FormatException as shown in scenario 1).
Uri resourceAddress = new Uri(AddressField.Text);
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, resourceAddress);
MeteredConnectionPriority priority = MeteredConnectionPriority.Low;
if (MediumRadio.IsChecked.Value)
{
priority = MeteredConnectionPriority.Medium;
}
else if (HighRadio.IsChecked.Value)
{
priority = MeteredConnectionPriority.High;
}
request.Properties["meteredConnectionPriority"] = priority;
HttpResponseMessage response = await httpClient.SendRequestAsync(request).AsTask(cts.Token);
await Helpers.DisplayTextResultAsync(response, OutputField, cts.Token);
rootPage.NotifyUser("Completed", NotifyType.StatusMessage);
}
catch (TaskCanceledException)
{
rootPage.NotifyUser("Request canceled.", NotifyType.ErrorMessage);
}
catch (Exception ex)
{
rootPage.NotifyUser("Error: " + ex.Message, NotifyType.ErrorMessage);
}
finally
{
Helpers.ScenarioCompleted(StartButton, CancelButton);
}
}