c# - NullReferenceException when calling Sitecore Database.Templates[] inside WCF service -

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i'm new sitecore development, apologies if question basic. i've created both agent (scheduled task) , wcf service , have them both added sitecore project. agent calls same code wcf service code calls.

the issue having when call database.template[id template] passing in id container of corresponding template item want process, works inside agent task, not inside wcf service.

any call database.template[id id] inside wcf service giving me nullreferenceexception, exact same call inside agent gathers template properly.

is due structural reason dependent on calling application being webpage instead of webservice?

edit #1: have svc allowed extension, , have tried both 

sitecore.configuration.factory.getdatabase("master")

and 

var sitecontext = sitecore.configuration.factory.getsite("websitemaster"); sitecontext.database.template[];

both return nullreferenceexception.

i can obtain item, using getitem, when try access template property of item, nullreferenceexception.

you have no sitecore context wcf service , sitecore.context.database null.

you can either add svc list of allowed extensions or data via sitecore.configuration.factory.getdatabase("master")


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