wan.liyang/TryIT.MicrosoftGraphApiv2.1.0

How to use this library

access https://docs.microsoft.com/en-us/graph/auth-v2-user to understand more

1. create a page to allow manual sign in account
2. page callback method, obtain access_token and save it in somewhere (e.g. Session / DB)
3. use that access_token to call Graph Service

How to use TokenHelper to obtain access_token

1. add reference to TryIT.MicrosoftGraphApi into your code
2. create a page to allow Administrator initial token
3. in that page, use example code below to get token and save it

// page action call this method, and this method will redirect to AD login page private MsGraphGetTokenConfig GetTokenConfig { get { return new MsGraphGetTokenConfig { OAuth_AuthorizeUrl = "", OAuth_TenantId = "", OAuth_ClientId = "", OAuth_RedirectUrl = "", // this is Callback url OAuth_Scope = "", OAuth_GetTokenUrl = "", OAuth_ClientSecret = "", OAuth_IsProxyRequired = "", Proxy_Url = "", Proxy_Username = "", Proxy_Password = "" }; } } public void SignIn() { TokenHelper tokenHelper = new TokenHelper(GetTokenConfig); // 1. validate token config if (tokenHelper.IsOAuthParameterValid) { // if token parameter is valid, then use browser redirect to the tokenHelper.AuthorizeUrl (Callback below) string authorizeURL = tokenHelper.AuthorizeUrl; // use code to redirect to authorizeURL this.RedirectUrl(authorizeURL); } } // this url is configured in Azure, after sign in, will redirect back to this url public void Callback() { string code = string.Empty; string state = string.Empty; if (!string.IsNullOrEmpty(code)) { GetTokenResponse tokenResponse = tokenHelper.GetToken(code, state); // save token if need } else { // invalid response } } private void SaveToken(GetTokenResponse token) { // save token somewhere } private string GetToken() { /* * 1. get exists token (StateGuid, ExpiresOn, Access_token, Refresh_token) * 2. check token expiry, if ExpiresOn < Now, need refresh token to get new token * 3. save new token */ var savedToken = "" // get saved token from session / db, this could be Object or DataTable if("savedToken is valid" == true) // check the token validity, e.g. check is not null { GetTokenResponse token = new GetTokenResponse { state = "[get state from exists token]", expires_on = "[get expires_on from exists token]", access_token = "[get expires_on from exists token]", refresh_token = "[get refresh_token from exists token]" }; // here check token expiry, expires_on < DateTime.Now, if expired, will call RefreshToken to get latest valid token if(token.expires_on < DateTime.Now) { MsGraphGetTokenConfig tokenConfig = GetTokenConfig; TokenHelper tokenHelper = new TokenHelper(tokenConfig); GetTokenResponse tokenResponse = tokenHelper.RefreshToken(token.refresh_token, token.state); SaveToken(tokenResponse); return tokenResponse.access_token; } return token.access_token; } else { throw new Exception("Token not exists, please SignIn first."); } }