How To Login With LinkedIn In MVC

Ankit Kanojia

6y61.6k24100Article

ASP.NET MVC LoginLinkedIn

24 Comments

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atul6y ago
Hi Ankit,My response is coming blank, I dont know where I am doing wrong IRestResponse response = client.Execute(request); var content = response.Content;
- Ankit Kanojia6y ago
  Can you provide me all the details of requested call? Let's be in personal window.
- atul6y ago
  var client = new RestClient("https://www.linkedin.com/oauth/v2/accessToken"); var request = new RestRequest(Method.POST); request.AddParameter("grant_type", "authorization_code"); request.AddParameter("code", code); request.AddParameter("redirect_uri", "http://localhost:57633/Home/LinkedINAuth"); request.AddParameter("client_id", "784g41ihl71bgk"); request.AddParameter("client_secret", "1RmX0nqHJymVJRUe"); IRestResponse response = client.Execute(request); var content = response.Content;
- atul6y ago
  I just saw. Client.execute is giving following exception The request was aborted: Could not create SSL/TLS secure channel. Any idea where it is failing..
Ankit Kanojia6y ago
Thank you so much Raja sekhar
Ankit Kanojia6y ago
Thank you so much Raja sekhar
Ankit Kanojia6y ago
Thank you so much Ashish Upalekar
Ankit Kanojia6y ago
Thank you so much vishal joshi for being interactive
Ankit Kanojia6y ago
Have you tried with your tokens and credentials Vikas Singh? can you elloborate the actual scenerio of issue so that it helps me to resolve issue on same direction.
- atul6y ago
  Hi Vikas, were you able to solve this?
- Vikas Singh6y ago
  Here hiting this Api------------------------------------------------------------------------------------- https://api.linkedin.com/v1/people/~?oauth2_access_token=AQWLqoB0s0apvtrlRekktEe2XUZLC44Vwie0G2dAzsErUaOVKdIZBTBx5G-BEClYCrAJfq0xhofwUrvxgvlHd8IWezvZElSJZr2dIz5ycP0ixv8e_SO7XLcCrGMqieg8RSzZPP7kCs6pT3ER8FLmKVhg79xXatKapmnjHD054VlPcwvfMmP8c71FOekuVXBFB5nHCJgagWH_47hQdIL6x0V3OH7996uh-UExC1BOqbKLQpQvfFk9TBI4D_OVwNYGc4j-7Byg_RbxNyCuv2A8qg0drgVHZKGloRZp7CcQgCeXd0HgCB0EILVO6NB4GWlPrRUeDKq9_VxaiKH-kkCdqhb7o21G1g&format=json ----------------------------------------------------------------Here on this Api Responce like this :- { "errorCode": 0, "message": "This resource is no longer available under v1 APIs", "requestId": "C429K7QIS2", "status": 410, "timestamp": 1583994616705 } The Code Is :- ------------------------------------------------------------------------------------------------- var client = new RestClient("https://www.linkedin.com/oauth/v2/accessToken"); var request = new RestRequest(Method.POST); request.AddParameter("grant_type", "authorization_code"); request.AddParameter("code", code); request.AddParameter("redirect_uri", "http://localhost:57633/Home/LinkedINAuth"); request.AddParameter("client_id", "81qwzypoua0y97"); request.AddParameter("client_secret", "gH2exhTg1r6jqK1K"); IRestResponse response = client.Execute(request); var content = response.Content; //Fetch AccessToken JavaScriptSerializer jsonSerializer = new JavaScriptSerializer(); LinkedINVM linkedINVM = jsonSerializer.Deserialize(content); //Get Profile Details client = new RestClient("https://api.linkedin.com/v1/people/~?oauth2_access_token=" + linkedINVM.access_token + "&format=json"); request = new RestRequest(Method.GET); response = client.Execute(request); content = response.Content; jsonSerializer = new JavaScriptSerializer(); LinkedINResVM linkedINResVM = jsonSerializer.Deserialize(content); return View(linkedINResVM);
Ankit Kanojia6y ago
Thank you so much Vikas Singh, will revert back once i fot the resolution for the issue posted by you. By the way again thanks for being interactive.
Ankit Kanojia6y ago
Thank you so much Raja sekhar
Ankit Kanojia6y ago
Thank you so much Dheeraj Pandey
Ankit Kanojia6y ago
Rajeev Ranjan : There are many choices.. but i choose restsharp.. its light weight and simple that is the reason..
Vikas Singh6y ago
Here access_token is invalid because api responce is invalid -----------------------------------------------------------------------Var client = new RestClient("https://www.linkedin.com/oauth/v2/accessToken"); var request = new RestRequest(Method.POST); request.AddParameter("grant_type", "authorization_code"); request.AddParameter("code", code); request.AddParameter("redirect_uri", "http://localhost:57633/Home/LinkedINAuth"); request.AddParameter("client_id", "81qwzypoua0y97"); request.AddParameter("client_secret", "gH2exhTg1r6jqK1K"); IRestResponse response = client.Execute(request); var content = response.Content; //Fetch AccessToken JavaScriptSerializer jsonSerializer = new JavaScriptSerializer(); LinkedINVM linkedINVM = jsonSerializer.Deserialize<LinkedINVM>(content); //Get Profile Details client = new RestClient("https://api.linkedin.com/v1/people/~?oauth2_access_token=" + linkedINVM.access_token + "&format=json"); request = new RestRequest(Method.GET); response = client.Execute(request); content = response.Content; jsonSerializer = new JavaScriptSerializer(); LinkedINResVM linkedINResVM = jsonSerializer.Deserialize<LinkedINResVM>(content); return View(linkedINResVM);
Raja sekhar8y ago
Hi Suchit How can i retrieve Email Address??
siva c8y ago
Hi Suchit, I tried to get the access token by this Local IIS url like request.AddParameter("redirect_uri", "http://our system ipaddress/virdirname/Home/LinkedINAuth"); but, after login i am getting the object null reference error. Could you please help on this?
Ashish Upalekar9y ago
Hi Suchit, Code is working fine for r_basic profile but when I replace it with r_fullprofile its not working. Getting null response. I have one app where I configured r_fullprofile permission. I understand that I need to expand LinkedInVM class to hold additional info. But atleast I should have got response. Do you have any code for r_fullprofile ?
Dheeraj Pandey9y ago
In above example "linkedINVM.access_token " is not define any where and thats why i am not able to gate profile detail. so please help me to get user profile detail.
- vishal joshi9y ago
  Whatever the response came on that we have to get access_token for ex: var responseAcces = client.Execute<InventoryItem>(request); Now InventoryItem this one is class that you have declare like this : public class InventoryItem { public string access_token {get;set;} } Next step : string access_token = responseAcces.Data.access_token; Thats it . than follow above code..:)
Rajeev Ranjan10y ago
Super article sir, but why Restsharp?there is already linkedin dll for same task

So, we need to install RestSharp Library because we use RestAPI for OAuth 2.0. For the same, go to Tools > NuGet Package Manager > Package Manager Console.

Type "Install-Package Restsharp" and hit Enter.
Then, we need to request the Authorization Code.

URL(GET)

https://www.linkedin.com/oauth/v2/authorization

Parameter
1. response_type: code
2. client_id: Your client id
3. redirect_uri: Return url of your website
4. scope: r_basicprofile
Create an Action Method as Below.
1. public ActionResult LinkedIN() {
2. //Need to install below library
3. //Install-Package Restsharp
4. return View();
5. }
6. Add View
7. for that action method Paste Below code in LinkedIN.cshtml < html > < head > < title > LinkedIN Login API < /title> < /head> < body > < div > < a href = "https://www.linkedin.com/oauth/v2/authorization?response_type=code&client_id=enter your client id here&redirect_uri=enter your redirect url here&state=987654321&scope=r_basicprofile"
8. class = "btn btn-primary" > Hureee!Login with LinkedIN < /a> < /div> < /body> < /html>
So. we have already requested for an Authorization code in the above code. Now, we need to handle Response of that request. We got code and state parameter in response.

By using the below code, we can get "access_token". Then, by using access_token, we can get the basic information about the user.

Here we go.
1. Create an ActionResult method to handle Authorization.
2. public ActionResult LinkedINAuth(string code, string state) {
3. //This method path is your return URL
4. return View();
5. }
First, we need to get access_token for same we use RestAPI

URL(POST)

https://www.linkedin.com/oauth/v2/accessToken

Parameter
1. grant_type: authorization_code
2. code: code that is get from Authorization response
3. redirect_uri: Return url of your website
4. client_id: your client id
5. client_secret: your client secret
6. public ActionResult LinkedINAuth(string code, string state) {
7. //This method path is your return URL
8. try {
9. //Get Accedd Token
10. var client = new RestClient("https://www.linkedin.com/oauth/v2/accessToken");
11. var request = new RestRequest(Method.POST);
12. request.AddParameter("grant_type", "authorization_code");
13. request.AddParameter("code", code);
14. request.AddParameter("redirect_uri", "http://localhost:57633/Home/LinkedINAuth");
15. request.AddParameter("client_id", "your client id here");
16. request.AddParameter("client_secret", "your client secret here");
17. IRestResponse response = client.Execute(request);
18. var content = response.Content;
19. } catch () {
20. throw;
21. }
22. return View();
23. }
We got the access_token. Now, we get "basic profile detail" of user based on access_token using RestAPI.

URL(POST)

https://api.linkedin.com/v1/people/~?oauth2_

Parameter
1. access_token: access token that is get from above response
2. code: code that is get from Authorization response
3. format: json
4. public ActionResult LinkedINAuth(string code, string state) {
5. //This method path is your return URL
6. try {
7. //Get Accedd Token
8. var client = new RestClient("https://www.linkedin.com/oauth/v2/accessToken");
9. var request = new RestRequest(Method.POST);
10. request.AddParameter("grant_type", "authorization_code");
11. request.AddParameter("code", code);
12. request.AddParameter("redirect_uri", "http://localhost:57633/Home/LinkedINAuth");
13. request.AddParameter("client_id", "your client id here");
14. request.AddParameter("client_secret", "your client secret here");
15. IRestResponse response = client.Execute(request);
16. var content = response.Content;
17. //Get Profile Details
18. client = new RestClient("https://api.linkedin.com/v1/people/~?oauth2_access_token=" + linkedINVM.access_token + "&format=json");
19. request = new RestRequest(Method.GET);
20. response = client.Execute(request);
21. content = response.Content;
22. } catch () {
23. throw;
24. }
25. return View();
26. }

All done....