/// <summary>
/// Checks that a Graph client is available.
/// </summary>
/// <returns>The Graph client.</returns>
public static async Task <ActiveDirectoryClient> EnsureGraphClientCreatedAsync()
{
// Active Directory service endpoints
const string AadServiceResourceId = "https://graph.windows.net/";
Uri AadServiceEndpointUri = new Uri("https://graph.windows.net/");
try
{
AuthenticationContext = new AuthenticationContext(CommonAuthority);
TokenCacheItem cacheItem = null;
if (AuthenticationContext.TokenCache.ReadItems().Count() > 0)
{
// Bind the AuthenticationContext to the authority that sourced the token in the cache
// this is needed for the cache to work when asking for a token from that authority
// (the common endpoint never triggers cache hits)
cacheItem = AuthenticationContext.TokenCache.ReadItems().First();
AuthenticationContext = new AuthenticationContext(cacheItem.Authority);
}
else
{
// Nothing was found in the cache, so let's acquire a token.
var token = await AcquireTokenAsync(AuthenticationContext, AadServiceResourceId);
// Check the token
if (String.IsNullOrEmpty(token))
{
// User cancelled sign-in
return(null);
}
else
{
// If a token was acquired, the TokenCache will contain a TokenCacheItem containing
// all the details of the authorization.
cacheItem = AuthenticationContext.TokenCache.ReadItems().First();
}
}
// Store the Id of the logged-in user so that we can retrieve more user info later.
_loggedInUser = cacheItem.UniqueId;
// Create our ActiveDirectory client.
var client = new ActiveDirectoryClient(
new Uri(AadServiceEndpointUri, cacheItem.TenantId),
async() => await AcquireTokenAsync(AuthenticationContext, AadServiceResourceId));
return(client);
}
// The following is a list of all exceptions you should consider handling in your app.
// In the case of this sample, the exceptions are handled by returning null upstream.
catch (DiscoveryFailedException dfe)
{
MessageDialogHelper.DisplayException(dfe as Exception);
// Discovery failed.
AuthenticationContext.TokenCache.Clear();
return(null);
}
catch (MissingConfigurationValueException mcve)
{
MessageDialogHelper.DisplayException(mcve);
// Connected services not added correctly, or permissions not set correctly.
AuthenticationContext.TokenCache.Clear();
return(null);
}
catch (AuthenticationFailedException afe)
{
MessageDialogHelper.DisplayException(afe);
// Failed to authenticate the user
AuthenticationContext.TokenCache.Clear();
return(null);
}
catch (ArgumentException ae)
{
MessageDialogHelper.DisplayException(ae as Exception);
// Argument exception
AuthenticationContext.TokenCache.Clear();
return(null);
}
}
/// <summary>
/// Checks that an OutlookServicesClient object is available.
/// </summary>
/// <returns>The OutlookServicesClient object. </returns>
public static async Task <OutlookServicesClient> EnsureOutlookClientCreatedAsync()
{
try
{
AuthenticationContext = new AuthenticationContext(CommonAuthority);
if (AuthenticationContext.TokenCache.ReadItems().Count() > 0)
{
// Bind the AuthenticationContext to the authority that sourced the token in the cache
// this is needed for the cache to work when asking for a token from that authority
// (the common endpoint never triggers cache hits)
string cachedAuthority = AuthenticationContext.TokenCache.ReadItems().First().Authority;
AuthenticationContext = new AuthenticationContext(cachedAuthority);
}
// Create a DiscoveryClient using the discovery endpoint Uri.
DiscoveryClient discovery = new DiscoveryClient(DiscoveryServiceEndpointUri,
async() => await AcquireTokenAsync(AuthenticationContext, DiscoveryResourceId));
// Now get the capability that you are interested in.
CapabilityDiscoveryResult result = await discovery.DiscoverCapabilityAsync("Mail");
var client = new OutlookServicesClient(
result.ServiceEndpointUri,
async() => await AcquireTokenAsync(AuthenticationContext, result.ServiceResourceId));
return(client);
}
// The following is a list of all exceptions you should consider handling in your app.
// In the case of this sample, the exceptions are handled by returning null upstream.
catch (DiscoveryFailedException dfe)
{
MessageDialogHelper.DisplayException(dfe as Exception);
// Discovery failed.
AuthenticationContext.TokenCache.Clear();
return(null);
}
catch (MissingConfigurationValueException mcve)
{
MessageDialogHelper.DisplayException(mcve);
// Connected services not added correctly, or permissions not set correctly.
AuthenticationContext.TokenCache.Clear();
return(null);
}
catch (AuthenticationFailedException afe)
{
MessageDialogHelper.DisplayException(afe);
// Failed to authenticate the user
AuthenticationContext.TokenCache.Clear();
return(null);
}
catch (ArgumentException ae)
{
MessageDialogHelper.DisplayException(ae as Exception);
// Argument exception
AuthenticationContext.TokenCache.Clear();
return(null);
}
}
