通过目标C调用时未找到Web服务方法

Question

My App_Code/IGetEmployees.vb file

<ServiceContract()> _
Public Interface IGetEmployees
 <OperationContract()> _
<WebInvoke(Method:="POST", ResponseFormat:=WebMessageFormat.Json, BodyStyle:=WebMessageBodyStyle.Wrapped, UriTemplate:="json/contactoptions")> _
Function GetAllContactsMethod(strCustomerID As String) As List(Of NContactNames)
End Interface

My App_Code/GetEmployees.vb file

   <WebMethod()> _
 <ScriptMethod(ResponseFormat:=ResponseFormat.Json)> _
Public Function GetAllContactsMethod(strCustomerID As String) As List(Of NContactNames) Implements IGetEmployees.GetAllContactsMethod
    Utilities.log("Hit get all contacts at 56")
    Dim intCustomerID As Integer = Convert.ToInt32(strCustomerID)
    Dim lstContactNames As New List(Of NContactNames)
 'I add some contacts to the list.
Utilities.log("returning the lst count of " & lstContactNames.Count)
    Return lstContactNames
End Function

NContactNames is a class with 3 properties. So i am using ASP.NET web services to retrieve information from SQL server and pass it to my iPad in JSON format. I have a problem with parameter passing. So like you see i have 2 files IGetEmployees.vb and GetEmployees.vb. I am implementing the method GetAllContactsMethod. What's happening is the two lines in GetEmployees.vb file (Utilities.log), they never get logged. The function is not getting called at all.

My objective c code to call this function

    NSString *param = [NSString stringWithFormat:@"strCustomerID=%@",strCustomerID];
    jUrlString = [NSString stringWithFormat:@"%@",@"http://xyz-dev.com/GetEmployees.svc/json/contactoptions"];
    jurl = [NSURL URLWithString:jUrlString];
    NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:jurl];

    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:[param dataUsingEncoding:NSUTF8StringEncoding]];
    NSLog(@" request string is %@",[[request URL] absoluteString]);
    NSLog(@"Done");

    NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
    if(theConnection)
    {
        jData = [NSMutableData data];
        NSError *jError;
        NSMutableDictionary *json =[NSJSONSerialization JSONObjectWithData:jData options:kNilOptions error:&jError];
        NSLog(@"%@",json); //Gets Here and prints (null)
        NSLog(@"Done"); //prints this as well.

    }
    else
    {
        NSLog(@"No");
    }

At the time of posting this code the "if" statement is true and (null) is printed followed by "Done" The output of my absolute request is: request string is http://xyz-dev.com/GetEmployees.svc/json/contactoptions This is the first time i am writing json to accept parameters. So i might be missing something.What is it?Why is the function not getting called at all on the Visual Studio side. If you need more info please ask.Thanks...

Answer 1

this is the moethod in Objetive-C, for that.

-(void) insertEmployeeMethod

{

    if(firstname.text.length && lastname.text.length && salary.text.length)

    {

        NSString *str = [BaseWcfUrl stringByAppendingFormat:@"InsertEmployee/%@/%@/%@",firstname.text,lastname.text,salary.text];

        NSURL *WcfSeviceURL = [NSURL URLWithString:str];
        NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

        [request setURL:WcfSeviceURL];

        [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"];


        //create some label field to display status
        status.text = (isSuccessNumber && [isSuccessNumber boolValue] == YES) ? [NSString stringWithFormat:@"Inserted %@, %@",firstname.text,lastname.text]:[NSString stringWithFormat:@"Failed to insert %@, %@",firstname.text,lastname.text];
    }
}

Before to run the code, test your URL with POSTMAN, is an app from Google Chrome. regards.