Void destination

The Void destination can be used to discard records

Core package#

The VoidDestination is part of the ETLBox core package - you don’t need to reference any additional package to use this destination.

Usage#

The VoidDestination is best used when using predicate in your flow. All records in you flow need to be send to some kind of destination, otherwise your data flow will never finish. To discare records, simple send data into the VoidDestination.

public class MyRow {
    public int Value { get; set; }
}
var source = new CsvSource<MyRow>("test.txt");
var destKeep = new MemoryDestination<MyRow>();
var destVoid = new VoidDestination();

source.LinkTo(destKeep, v => v.Value > 10);
source.LinkTo(destVoid, v => v.Value <= 10);

Network.Execute(source);

Implict use#

The example above can be simplified to use it without an explicit declaration of the VoidDestination.

You can omit the declaration of the VoidDestination and change the linking of the flows using the third method parameter of the LinkTo() method:

public class MyRow {
    public int Value { get; set; }
}
var source = new CsvSource<MyRow>("test.txt");
var destKeep = new MemoryDestination<MyRow>();

source.LinkTo(destKeep, v => v.Value > 10, v => v.Value <= 10>);

Network.Execute(source);