C# NameValueCollection.AddItemIfNotEmpty方法代码示例

		/// <summary>
		/// Gets the extra data obtained from the response message when authentication is successful.
		/// </summary>
		/// <param name="response">
		/// The response message. 
		/// </param>
		/// <returns>A dictionary of profile data; or null if no data is available.</returns>
		protected override NameValueCollection GetExtraData(IAuthenticationResponse response) {
			FetchResponse fetchResponse = response.GetExtension<FetchResponse>();
			if (fetchResponse != null) {
				var extraData = new NameValueCollection();
				extraData.AddItemIfNotEmpty("email", fetchResponse.GetAttributeValue(WellKnownAttributes.Contact.Email));
				extraData.AddItemIfNotEmpty("fullName", fetchResponse.GetAttributeValue(WellKnownAttributes.Name.FullName));

				return extraData;
			}

			return null;
		}

		/// <summary>
		/// Given the access token, gets the logged-in user's data. The returned dictionary must include two keys 'id', and 'username'.
		/// </summary>
		/// <param name="accessToken">
		/// The access token of the current user. 
		/// </param>
		/// <returns>
		/// A dictionary contains key-value pairs of user data 
		/// </returns>
		protected override NameValueCollection GetUserData(string accessToken) {
			MicrosoftClientUserData graph;
			var request =
				WebRequest.Create(
					"https://apis.live.net/v5.0/me?access_token=" + MessagingUtilities.EscapeUriDataStringRfc3986(accessToken));
			using (var response = request.GetResponse()) {
				using (var responseStream = response.GetResponseStream()) {
					graph = JsonHelper.Deserialize<MicrosoftClientUserData>(responseStream);
				}
			}

			var userData = new NameValueCollection();
			userData.AddItemIfNotEmpty("id", graph.Id);
			userData.AddItemIfNotEmpty("username", graph.Name);
			userData.AddItemIfNotEmpty("name", graph.Name);
			userData.AddItemIfNotEmpty("link", graph.Link == null ? null : graph.Link.AbsoluteUri);
			userData.AddItemIfNotEmpty("gender", graph.Gender);
			userData.AddItemIfNotEmpty("firstname", graph.FirstName);
			userData.AddItemIfNotEmpty("lastname", graph.LastName);
			return userData;
		}

        /// <summary>
        /// Given the access token, gets the logged-in user's data. 
        /// The returned dictionary must include two keys 'id', and 'username'.
        /// </summary>
        /// <param name="accessToken">The access token of the current user.</param>
        /// <returns>A dictionary contains key-value pairs of user data</returns>
        protected override NameValueCollection GetUserData(string accessToken)
        {
            var uri = new Uri(userEndpoint + "?access_token=" + accessToken);
            var webRequest = (HttpWebRequest)WebRequest.Create(uri);
            using (var webResponse = webRequest.GetResponse())
            {
                using (var stream = webResponse.GetResponseStream())
                {
                    if (stream == null)
                        return null;

                    NameValueCollection c = new NameValueCollection();
                    var result = JsonSerializer.DeserializeFromStream<Dictionary<string, string>>(stream);
                    foreach (var item in result)
                    {
                        c.AddItemIfNotEmpty(item.Key, item.Value);
                    }
                    return c;
                }
            }
        }

		/// <summary>
		/// The get user data.
		/// </summary>
		/// <param name="accessToken">
		/// The access token.
		/// </param>
		/// <returns>A dictionary of profile data.</returns>
		protected override NameValueCollection GetUserData(string accessToken) {
			var userData = new NameValueCollection();
			try {
				AzureADGraph graphData;
				WebRequest request =
					WebRequest.Create(
						GraphEndpoint + this.tenantid + "/users/" + this.userid + "?api-version=2013-04-05");
				request.Headers = new WebHeaderCollection();
				request.Headers.Add("authorization", accessToken);
				using (var response = request.GetResponse()) {
					using (var responseStream = response.GetResponseStream()) {
						graphData = JsonHelper.Deserialize<AzureADGraph>(responseStream);
					}
				}

				// this dictionary must contains 
				userData.AddItemIfNotEmpty("id", graphData.ObjectId);
				userData.AddItemIfNotEmpty("username", graphData.UserPrincipalName);
				userData.AddItemIfNotEmpty("name", graphData.DisplayName);

				return userData;
			} catch (Exception e) {
				System.Diagnostics.Debug.WriteLine(e.ToStringDescriptive());
				return userData;
			}
		}

        /// <summary>
        /// Given the access token, gets the logged-in user's data. 
        /// The returned dictionary must include two keys 'id', and 'username'.
        /// </summary>
        /// <param name="accessToken">The access token of the current user.</param>
        /// <returns>A dictionary contains key-value pairs of user data</returns>
        protected override NameValueCollection GetUserData(string accessToken)
        {
            FacebookMe graphData = null;
            string requestUrl = "https://graph.facebook.com/me?access_token=" + UriHelper.EscapeUriDataStringRfc3986(accessToken);
            var request = System.Net.WebRequest.Create(requestUrl);
            using (var response = request.GetResponse())
            {
                using (var responseStream = response.GetResponseStream())
                {
                    if (responseStream != null)
                    {
                       var serializer = new DataContractJsonSerializer(typeof(FacebookMe));
                        graphData = (FacebookMe)serializer.ReadObject(responseStream);
                    }
                }
            }

            // this dictionary must contains
            var userData = new NameValueCollection();
            if (graphData != null)
            {
                userData.AddItemIfNotEmpty("id", graphData.Id);
                userData.AddItemIfNotEmpty("username", graphData.Email);
                userData.AddItemIfNotEmpty("name", graphData.Name);
                userData.AddItemIfNotEmpty("link", graphData.Link == null ? null : graphData.Link.AbsoluteUri);
                userData.AddItemIfNotEmpty("gender", graphData.Gender);
                userData.AddItemIfNotEmpty("birthday", graphData.Birthday);
            }
            return userData;
        }

		/// <summary>
		/// The get user data.
		/// </summary>
		/// <param name="accessToken">
		/// The access token.
		/// </param>
		/// <returns>A dictionary of profile data.</returns>
		protected override NameValueCollection GetUserData(string accessToken) {
			FacebookGraphData graphData;
			var request =
				WebRequest.Create(
					"https://graph.facebook.com/me?access_token=" + MessagingUtilities.EscapeUriDataStringRfc3986(accessToken));
			using (var response = request.GetResponse()) {
				using (var responseStream = response.GetResponseStream()) {
					graphData = JsonHelper.Deserialize<FacebookGraphData>(responseStream);
				}
			}

			// this dictionary must contains 
			var userData = new NameValueCollection();
			userData.AddItemIfNotEmpty("id", graphData.Id);
			userData.AddItemIfNotEmpty("username", graphData.Email);
			userData.AddItemIfNotEmpty("name", graphData.Name);
			userData.AddItemIfNotEmpty("link", graphData.Link == null ? null : graphData.Link.AbsoluteUri);
			userData.AddItemIfNotEmpty("gender", graphData.Gender);
			userData.AddItemIfNotEmpty("birthday", graphData.Birthday);
			return userData;
		}