What is different to get the Client Context by the following two methods.

Hi Expert,

Until now, I am a little confusing on the Client Context of the SharePoint Online. I can get the context by using the following solutions. what is different between the two methods. and how should I choose the correct method to get client context at the right time.?

one is as below: (To be honest, sometime I can get the context but sometimes cannot ... till now mycontextTokenString is stillnull).

string contextTokenString = TokenHelper.GetContextTokenFromRequest(Request);
_contextToken = TokenHelper.ReadAndValidateContextToken(contextTokenString, Request.Url.Authority);
_sharepointUrl = new Uri(Request.QueryString["SPHostUrl"]);
_realm = TokenHelper.GetRealmFromTargetUrl(_sharepointUrl);
var _responseToken = TokenHelper.GetAppOnlyAccessToken(TokenHelper.SharePointPrincipal, _sharepointUrl.Authority, _realm);
TokenHelper.GetClientContextWithAccessToken(_sharepointUrl.ToString(), _responseToken.AccessToken)

another is:

var _spContext = SharePointContextProvider.Current.GetSharePointContext(Context);
var _clientContext = _spContext.CreateUserClientContextForSPHost()

Hi there, if you found my comment very helpful then please | Propose as answer | . Thanks and Regards.