ios调用c#后台接口报文格式

- NSString *soapMessage =
-     [NSString stringWithFormat:
-      @"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
-      "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
-      "<soap:Body>"
-      "<Save xmlns=\"http://www.myapp.com/\">"
-      "<par1>%i</par1>"
-      "<par2>%@</par2>"
-      "<par3>%@</par3>"
-      "</Save>"
-      "</soap:Body>"
-      "</soap:Envelope>", par1, par2, par3
-      ];
- NSURL *url = [NSURL URLWithString:@"http://....asmx"];
-     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
-
-     NSString *msgLength = [NSString stringWithFormat:@"%lu", (unsigned long)[soapMessage length]];
-
-     [request addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
-     [request addValue: msgLength forHTTPHeaderField:@"Content-Length"];
-
-     [request setHTTPMethod:@"POST"];
-     [request setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
-
- AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
- operation.responseSerializer = [AFXMLParserResponseSerializer serializer];
- [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
-         if([self.delegate respondsToSelector:@selector(myAppHTTPClientDelegate:didUpdateWithWeather:)]){
-             [self.delegate myAppHTTPClientDelegate:self didUpdateWithWeather:responseObject];
-         }
-     } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
-         if([self.delegate respondsToSelector:@selector(myAppHTTPClientDelegate:self:didFailWithError:)]){
-             [self.delegate myAppHTTPClientDelegate:self didFailWithError:error];
-         }
-     }];
-
-     [operation start];

UPDATE
NSDictionary *s_request = @{@"par1": [NSString stringWithFormat:@"%i", par1], @"par2": par2, @"par3": par3, @"par4": [NSString stringWithFormat:@"%i", par4], @"par5": par5};

    AFHTTPSessionManager* s_manager = [[AFHTTPSessionManager alloc] init];

    [s_manager POST:@"http://192.168.10.26/mywebservice/myservice.asmx?op=MethodName" parameters:s_request success:^(NSURLSessionDataTask *task, id responseObject) {
        NSLog(@"DONE!");
    } failure:^(NSURLSessionDataTask *task, NSError *error) {
        NSLog(@"FAILED %@, %@", [error localizedDescription], [error localizedFailureReason]);
    }];

- [manager SOAP:@"/WebServices/WeatherWebService.asmx" constructingBodyWithBlock:^(NSMutableURLRequest *request) {
-     [request setHTTPBody:[soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
- } success:^(AFHTTPRequestOperation *operation, id responseObject) {
-     NSString *response = [[NSString alloc] initWithData:(NSData *)responseObject encoding:NSUTF8StringEncoding];
-     NSLog(@"%@, %@", operation, response);
- } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
-     NSString *response = [[NSString alloc] initWithData:(NSData *)[operation responseObject] encoding:NSUTF8StringEncoding];
-     NSLog(@"%@, %@", operation, error);
- }];