Consume WCF service in xcode 5 and ios 7 - wcf

Question

I have created a WCF Service to insert data in sql server, so that why I have followed the below structure.
I created first the method and his Implementation;
In WCF interface:
[OperationContract]
[WebInvoke(Method = "POST",
ResponseFormat = WebMessageFormat.Json,
RequestFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped,
UriTemplate = "json/InsertEmployee/{id1}/{id2}/{id3}")]
bool InsertEmployeeMethod(string id1,string id2, string id3);
In Implementation:
public bool InsertEmployeeMethod(string id1, string id2, string id3)
{
int success = 0;
using (SqlConnection conn = new SqlConnection("Data Source=NXT1;User ID=zakaria;Password=11;Initial Catalog=EmpDB;Integrated Security=false"))
{
conn.Open();
decimal value = Decimal.Parse(id3);
string cmdStr = string.Format("INSERT INTO EmpInfo VALUES('{0}','{1}',{2})", id1, id2, value);
SqlCommand cmd = new SqlCommand(cmdStr, conn);
success = cmd.ExecuteNonQuery();
conn.Close();
}
return (success != 0 ? true : false);
}
to test the web service, try that URL:
"41.142.251.142/JsonWcfService/GetEmployees.svc/json/InsertEmployee/myName/MylastName/6565"
until here all is working well,
So to test this web servcie, I created in my Main.storyboard 3 textFields (firstName.text and lastName.text and salary.text and a button to send the data entered). note that I have worked with xcode 5 and ios 7.
I declared the url inside my viewcontroller.m as following:
myViewController.m:
#define BaseWcfUrl [NSURL URLWithString:#"41.142.251.142/JsonWcfService/GetEmployees.svc/json/InsertEmployee/{id1}/{id2}/{id3}"]
Then I implemented the Insert Employee Method related to click button.
-(void) insertEmployeeMethod
{
if(firstname.text.length && lastname.text.length && salary.text.length)
{
NSString *getValue= [BaseWcfUrl stringByAppendingFormat:#"InsertEmployee/%#/%#/%#",firstname.text,lastname.text,salary.text];
NSURL *WcfServiceURL = [NSURL URLWithString:getValue];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:WcfServiceURL];
[request setHTTPMethod:#"POST"];
// connect to the web
NSData *respData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
// NSString *respStr = [[NSString alloc] initWithData:respData encoding:NSUTF8StringEncoding];
NSError *error;
NSDictionary* json = [NSJSONSerialization
JSONObjectWithData:respData
options:NSJSONReadingMutableContainers
error:&error];
NSNumber *isSuccessNumber = (NSNumber*)[json objectForKey:#"InsertEmployeeMethodResult"];
}
}
So the issue that I have encountered is that the system always return the str value as "Nil"
NSString *getValue= [BaseWcfUrl stringByAppendingFormat:#"InsertEmployee/%#/%#/%#",firstname.text,lastname.text,salary.text];
so you can see all the message error here :
2014-02-17 19:49:49.419 InsertData[2384:70b] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'data parameter is nil'
* First throw call stack:
0 CoreFoundation 0x017395e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x014bc8b6 objc_exception_throw + 44
2 CoreFoundation 0x017393bb +[NSException raise:format:] + 139
3 Foundation 0x012037a2 +[NSJSONSerialization JSONObjectWithData:options:error:] + 67
4 InsertData 0x0000236c -[ViewController sendData:] + 1452
5 libobjc.A.dylib 0x014ce874 -[NSObject performSelector:withObject:withObject:] + 77
6 UIKit 0x0022c0c2 -[UIApplication sendAction:to:from:forEvent:] + 108
7 UIKit 0x0022c04e -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61
8 UIKit 0x003240c1 -[UIControl sendAction:to:forEvent:] + 66
9 UIKit 0x00324484 -[UIControl _sendActionsForEvents:withEvent:] + 577
10 UIKit 0x00323733 -[UIControl touchesEnded:withEvent:] + 641
11 UIKit 0x0026951d -[UIWindow _sendTouchesForEvent:] + 852
12 UIKit 0x0026a184 -[UIWindow sendEvent:] + 1232
13 UIKit 0x0023de86 -[UIApplication sendEvent:] + 242
14 UIKit 0x0022818f _UIApplicationHandleEventQueue + 11421
CoreFoundation 0x016c283f CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 15
16 CoreFoundation 0x016c21cb __CFRunLoopDoSources0 + 235
17 CoreFoundation 0x016df29e __CFRunLoopRun + 910
18 CoreFoundation 0x016deac3 CFRunLoopRunSpecific + 467
19 CoreFoundation 0x016de8db CFRunLoopRunInMode + 123
20 GraphicsServices 0x036de9e2 GSEventRunModal + 192
21 GraphicsServices 0x036de809 GSEventRun + 104
22 UIKit 0x0022ad3b UIApplicationMain + 1225
23 InsertData 0x00002d5d main + 141
24 libdyld.dylib 0x01d7770d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
can you please help me on that, i'm very stressed with.
much appreciate .

Answer 1

I think you just have the wrong URL, you're adding InsertEmployee twice.
Change BaseWcfUrl to just [NSURL URLWithString:#"41.142.251.142/JsonWcfService/GetEmployees.svc/json/"] instead of [NSURL URLWithString:#"41.142.251.142/JsonWcfService/GetEmployees.svc/json/InsertEmployee/{id1}/{id2}/{id3}"]
To be absolutely sure, log the final URL to the console (or look at it in the debugger) to make sure it's correct.
Also, in your code, in NSURL *WcfServiceURL = [NSURL URLWithString:str];, where is str coming from? Did you mean getValue there?