how to consume the json web service in objective c? - objective-c

Question

i am consuming the json webservice .i am assigning the stringurl to nsurl but the nsurl always assigning the null value. also i didn't get the response. can anyone suggest me what is the mistake i done in the following coding
- (IBAction)addbutton:(id)sender {
NSString *urltest = #"sample url";
NSURL *url = [NSURL URLWithString:urltest];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response,
NSData *data, NSError *connectionError)
{
if (data.length > 0 && connectionError == nil)
{
NSDictionary *greeting = [NSJSONSerialization JSONObjectWithData:data
options:0
error:NULL];
NSString *test= [[greeting objectForKey:#"code"] stringValue];
NSString *test1 = [greeting objectForKey:#"message"];
}
}];}

Answer 1

Your URL string is invalid, note the part:
taxName=ÂU.F¿Kåa¥gh
Those characters are not allowed in URL. Fix your URL to a valid URL (e.g. percent-encode parameter values).
E.g. the above with URL encoding would be:
taxName=%C3%82U.F%C2%BFK%C3%A5a%C2%A5gh
but I am not sure that's correct. The parameter value does not seem to be valid.

Answer 2

Please use this:
NSString *urlString = #"http://localhost:8080/MyWebservice.asmx/GetHelloWorldWithParam";
NSURL *url = [NSURL URLWithString:urlString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod: #"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
NSString *myRequestString = #"param="; // Attention HERE!!!!
[myRequestString stringByAppendingString:myParamString];
NSData *requestData = [NSData dataWithBytes:[myRequestString UTF8String] length:[myRequestString length]];
[request setHTTPBody: requestData];
Thank you