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copied!<p>Try below , it might help you ...</p> <pre><code>NSString *purchaseURL=@"your url string inside"; NSString *postString=[NSString stringWithFormat:@"userid=1&couponid=1&Ccnum=7b6cd9a44365752cf39c1edf97890b72&Cctype=Visa&Cvv=434&Billingfirstname=Ankit&Billinglastname=Ankit&Street=some&getCity=mycity&State=mystate&getZip=54355&Ccexpmonth=5&Ccexpyear=2012&Phone=43423342"]; NSData *postData=[postString dataUsingEncoding:NSUTF8StringEncoding]; NSURL *url = [NSURL URLWithString:purchaseURL]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; [request setHTTPMethod:@"POST"]; [request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; [request setHTTPBody:postData]; [request setValue:[NSString stringWithFormat:@"%i",postData.length] forHTTPHeaderField:@"Content-Length"]; [request setHTTPShouldHandleCookies:YES]; [request setTimeoutInterval:30]; [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData]; NSError *err=nil; NSData *responseData=[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:&err]; NSString *responseString=[[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; NSLog(@"response String is %@",responseString); </code></pre> <p>If still will give some error try changing post string as given below</p> <pre><code> NSMutableDictionary *postDix=[[NSMutableDictionary alloc] init]; [postDix setValue:@"1" forKey:@"userid"]; [postDix setValue:@"7b6cd9a44365752cf39c1edf97890b72" forKey:@"Ccnum"]; [postDix setValue:@"Visa" forKey:@"Cctype"]; [postDix setValue:@"434" forKey:@"Cvv"]; [postDix setValue:@"Ankit" forKey:@"Billingfirstname"]; [postDix setValue:@"Ankit" forKey:@"Billinglastname"]; [postDix setValue:@"some" forKey:@"Street"]; [postDix setValue:@"mycity" forKey:@"getCity"]; [postDix setValue:@"mystate" forKey:@"State"]; [postDix setValue:@"54355" forKey:@"getZip"]; [postDix setValue:@"5" forKey:@"Ccexpmonth"]; [postDix setValue:@"2012" forKey:@"Ccexpyear"]; [postDix setValue:@"43423342" forKey:@"Phone"]; NSString *postString=[NSString stringWithFormat:@"%@", postDix]; </code></pre> <p>OR changing post data as :-</p> <pre><code>NSMutableDictionary *postDix=[[NSMutableDictionary alloc] init]; [postDix setValue:@"1" forKey:@"userid"]; [postDix setValue:@"7b6cd9a44365752cf39c1edf97890b72" forKey:@"Ccnum"]; [postDix setValue:@"Visa" forKey:@"Cctype"]; [postDix setValue:@"434" forKey:@"Cvv"]; [postDix setValue:@"Ankit" forKey:@"Billingfirstname"]; [postDix setValue:@"Ankit" forKey:@"Billinglastname"]; [postDix setValue:@"some" forKey:@"Street"]; [postDix setValue:@"mycity" forKey:@"getCity"]; [postDix setValue:@"mystate" forKey:@"State"]; [postDix setValue:@"54355" forKey:@"getZip"]; [postDix setValue:@"5" forKey:@"Ccexpmonth"]; [postDix setValue:@"2012" forKey:@"Ccexpyear"]; [postDix setValue:@"43423342" forKey:@"Phone"]; NSMutableData *postData = [[NSMutableData alloc] init]; NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:postData]; [archiver encodeObject:postDix forKey:@"json"]; [archiver finishEncoding]; </code></pre>

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