From CoreData to XML Export

[brush51]

Hey folks,

i have some Data in my TableView(saved and loaded with coreData and sqlite). Now i want to export this data as an *.xml file.

How can i do that? Links and tips for me?


Thanks,
brush51

[TUX2K]

Fetch the object, via NSFetchRequest.
Create a NSMutableString, loop threw the items in the array create with the fetchRequest.
Append each item as needed to the MutableString, with the XML format you want,

Then you have your XML.

[brush51]

Originally Posted by TUX2K

Fetch the object, via NSFetchRequest.
Create a NSMutableString, loop threw the items in the array create with the fetchRequest.
Append each item as needed to the MutableString, with the XML format you want,

Then you have your XML.

Thanks for your answer,

but i dont understand the "Fetch the object, via NSFetchRequest.
Create a NSMutableString, loop threw the items in the array create with the fetchRequest" part.

Like this? :

NSFetchRequest *fr = [[NSFetchRequest alloc] init];
		[fr valueForKey:@"barCode"];

[TUX2K]

Read this: Loading…

[brush51]

Originally Posted by TUX2K

Read this: Loading…

Ah ok i understand. Now i do this:

	NSManagedObjectContext *moc = [self managedObjectContext];
	NSFetchRequest *req = [[NSFetchRequest alloc] init];
	
	[req setEntity:[NSEntityDescription entityForName:@"Event" inManagedObjectContext:moc]];
	[req setIncludesPropertyValues:NO];
	
	NSError *error;
	
	NSArray *cars = [moc executeFetchRequest:req error:&error];
	[all release];
	
	for (NSManagedObject *Event in codes) {
		NSLog(@"look at that: ----> %@", Event);
		NSLog(@"whats this? : ------------> %@", codes);		
	}

I dont know how to get only the property.

[TUX2K]

	NSManagedObjectContext *moc = [self managedObjectContext];
	NSFetchRequest *req = [[NSFetchRequest alloc] init];
	
	[req setEntity:[NSEntityDescription entityForName:@"Event" inManagedObjectContext:moc]];
	[req setIncludesPropertyValues:NO];
	
	NSError *error;
	
	NSArray *cars = [moc executeFetchRequest:req error:&error];
	[all release];
	
	for (Event *event in cars) {
               //Now you can get at all the properties of the class type event.

		NSLog(@"look at that: ----> %@", event);
		
	}

[brush51]

I know but i want just the data from ONE property, named barCode.

How to do that?

[TUX2K]

try this:

   NSMutableString *xmlString = [NSMutableString string];
   [xmlString appendString:@"<?xml version=\"1.0\" ?>\n"];
   [xmlString appendString:@"<BarCodeList>\n"];
   
    for (Event *event in cars) {
       [xmlString appendFormat:@"<BarCode>%@</BarCode>\n", event.barCode];
   }
   [xmlString appendString:@"</BarCodeList>"];

  NSLog(@"%@", xmlString);

[brush51]

Originally Posted by TUX2K

try this:

   NSMutableString *xmlString = [NSMutableString string];
   [xmlString appendString:@"<?xml version=\"1.0\" ?>\n"];
   [xmlString appendString:@"<BarCodeList>\n"];
   
    for (Event *event in cars) {
       [xmlString appendFormat:@"<BarCode>%@</BarCode>\n", event.barCode];
   }
   [xmlString appendString:@"</BarCodeList>"];

  NSLog(@"%@", xmlString);

Thanks for sharing this code, i have included the Event class and defined es property event. But doesnt, work, i get (null).

Maybe the datas are not saved persistently??

When i do in case of event.barCode this:

[[managedObject valueForKey:@"barCode"] description]]

i get a few times the same code. For example i have 5 rows in the tableview, then i get 5 times the last row.