How to login to ASP.Net MVC website (Forms authentication) using HttpClient in Windows Store App? -

first created httpclienthandler cookie container

cookiecontainer cookies = new cookiecontainer(); httpclienthandler handler = new httpclienthandler(); handler.cookiecontainer = cookies; handler.usecookies = true; var hc = new httpclient(handler); 

then hit base url cookie "__requestverificationtoken"

string r = await hc.getstringasync(baseurl); 

then post username/password login url

httpcontent content = new formurlencodedcontent(new[] {     new keyvaluepair<string, string>("username", "admin"),     new keyvaluepair<string, string>("password", password), }); httpresponsemessage response = await hc.postasync(loginurl, content); 

then server error "the required anti-forgery form field "__requestverificationtoken" not present".

but when check request in fiddler, can see "__requestverificationtoken" added in cookies of request.

then tried login manually in ie, , check kind of request ie sent.

then discovered ie put "__requestverificationtoken" in form, added cookie in form

new keyvaluepair<string, string>("__requestverificationtoken", cookies.getcookies(new uri(baseurl)).cast<cookie>().firstordefault(x => x.name == "__requestverificationtoken").value) 

then got error

"validation of provided anti-forgery token failed. cookie "_requestverificationtoken" , form field "_requestverificationtoken" swapped."

then couldn't search result on google error.

any idea?

thanks

found issue.

the "__requestverificationtoken" added cookie different 1 added form.

so took value of "__requestverificationtoken" in form returned html string, worked!