Question

I am getting list using url by doing parsing it using xml parser. sometimes the server is not working properly. then how to give an alert when server is not working properly. I have given the code below

-(NSMutableArray*)getCustomerList:(NSString *)count category:(NSString *)aCategory alphabetic:(NSString *)alphabeticValue favorite:(NSString *)isFavoriteString
{
    [self updateStatus];
    if (internetConnectionStatus == NotReachable) 
    {

        UIAlertView *reachbleAlert = [[UIAlertView alloc] initWithTitle:@"message"
                                                                message: @"No network available alert"
                                                               delegate:self 
                                                      cancelButtonTitle:@"Ok"
                                                      otherButtonTitles: nil];
        [reachbleAlert show];   
        [reachbleAlert release];
        return 0;
    }
    else 
    {

        NSString *urlString=@"http:getCustomerList.jsp";
        urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
        [dataParser parseXMLFileAtURL:[NSURL URLWithString:urlString]];
        NSMutableArray *list =[dataParser getCustomerListFromParser];
        printf("\n url for Customer List%s",[urlString UTF8String]);
        printf("\n Customer List   %d",[list count]);
        return list;
    }
}

I am sending parameter to url to return repctive list when it returns zero I am dispalying alert in view controller.

but when server is not working properly then how to display this alert.

Please help me out of this.

Thank you,
Madan mohan.

Answer 1

In my opinion :
First perform the request operation to the server for any response.

Secondly Catch the the response received in a BOOL variable .

Finally when your BOOL variable is TRUE perform the desired operation [Such as parsing..]
Otherwise just show an alert message with a proper error message.